CN114441123B - High-temperature force limit vibration test method - Google Patents
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- CN114441123B CN114441123B CN202111521732.1A CN202111521732A CN114441123B CN 114441123 B CN114441123 B CN 114441123B CN 202111521732 A CN202111521732 A CN 202111521732A CN 114441123 B CN114441123 B CN 114441123B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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Abstract
The application provides a high-temperature force limit vibration test method, which comprises the following steps: performing a normal-temperature vibration test on the test piece, and obtaining vibration data of the test piece; in response to determining that a deviation value between vibration data of the test piece and target vibration data of the test piece is within a predetermined tolerance range, input vibration data of the force sensor is standard input vibration data, and vibration excitation data of a vibration excitation input point of the vibration table is standard vibration excitation input point data; and carrying out a high-temperature vibration test on the test piece based on the standard input vibration data and the standard vibration excitation input point data, thereby realizing accurate control on vibration of the test piece in a high-temperature environment.
Description
Technical Field
The application relates to the technical field of aviation, in particular to a high-temperature force limit vibration test method.
Background
Aviation devices such as ultra-high sound velocity aircrafts and the like need to work in a thermal vibration composite environment, and the thermal vibration composite environment is at most hundreds of degrees celsius or even thousands of degrees celsius and is accompanied by strong random vibration. The real thermal vibration composite environment is simulated through a high-temperature vibration test, and the method has important significance in accurately testing and analyzing the adaptability of aviation devices such as ultra-high sound velocity aircrafts and the like in the thermal vibration composite environment.
In a thermal vibration composite environment, a thermal load is required to be applied to the test piece. The control sensor for controlling the vibration response of the test piece has poor high temperature resistance and cannot be arranged on the test piece, so that the accurate control of the vibration response of the test piece cannot be realized.
Disclosure of Invention
In view of the above, the present application is directed to a high-temperature force-limited vibration test method, which solves or partially solves the above-mentioned problems.
In view of the above-mentioned objects, the present application provides a high temperature force limit vibration test method, applied to a high temperature force limit vibration test system, the system including a controller, a driving member, a vibration table, and a force sensor, the vibration table including a vibration excitation input point, the driving member being configured to input a vibration force to the vibration table at the vibration excitation input point, the vibration table being configured to output the vibration force and vibration excitation data, the force sensor being configured to transmit the vibration force to a test piece; the controller is configured to store target vibration data of the test piece, receive a force signal input to the force sensor, and output input vibration data corresponding to the force signal; the method comprises the following steps:
performing a normal-temperature vibration test on the test piece, and obtaining vibration data of the test piece;
In response to determining that a deviation value between vibration data of the test piece and target vibration data of the test piece is within a predetermined tolerance range, input vibration data of the force sensor is standard input vibration data, and vibration excitation data of a vibration excitation input point of the vibration table is standard vibration excitation input point data;
and carrying out a high-temperature vibration test on the test piece based on the standard input vibration data and the standard vibration excitation input point data.
From the above, the high temperature force limit vibration test method provided by the application is characterized in that standard input vibration data of the force sensor and standard vibration excitation input point data of the vibration excitation input point of the vibration table are obtained through a normal temperature vibration test. In the high-temperature vibration test, an indirect control method is adopted, vibration data input by a control force sensor are standard input vibration data, and excitation input point data of vibration excitation input points of a vibration table are standard vibration excitation input point data, so that the purpose of accurately controlling vibration of a test piece is achieved.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high temperature force limit vibration test system according to an embodiment of the present application;
FIG. 2 is a flow chart of a high temperature force limit vibration test method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a normal temperature vibration test arrangement structure according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a high temperature vibration test arrangement according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a high temperature force limit vibration test method system according to an embodiment of the present application.
In the figure: 1-a test piece; 2-force sensor; 3-a vibrating table; 4-a first control sensor; 5-measuring sensors; 6-a second control sensor.
Detailed Description
The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The high heat can cause the change of physical and mechanical properties of the material of the aviation device, change the elastic modulus of the material, influence the vibration characteristics and rigidity of the material structure, and reduce the bearing capacity and strength limit of the material structure; different material transmissivities are different, and the structure can be deformed thermally to generate faults; in the violent vibration environment, the structure can be misplaced, separated or shed, and the normal use of the structure is influenced. Therefore, the real thermal vibration composite environment is simulated, and the material bearing capacity, strength limit, deformation characteristic, structural change and the like in the thermal vibration composite environment are studied.
In the high-temperature vibration test, the vibration response of a test piece is difficult to control, and two main modes exist in the prior art. One is direct control: the high temperature control sensor is stuck on the test piece, and the vibration response of the test piece is directly regulated and controlled through the high temperature control sensor. However, the most advanced high temperature control sensor in foreign countries is known at present, the highest tolerance temperature is 650 ℃, but according to the test record of NASA (national aviation and aerospace agency), the sensor is used in a temperature environment exceeding 500 ℃, the reliability is not high, the failure of the test is easy to cause, the price is high, and the sensor is difficult to be suitable for high temperature vibration test.
The other is indirect control, such as vibration control on a vibration excitation input point of the vibration table, and vibration response of the test piece at the high-temperature part is not controlled; or an extension rod is arranged on the monitoring point of the test piece, and a control sensor is stuck on the extension rod to perform vibration control. On one hand, the indirect control neglects the transmission characteristics of force attenuation, increment and the like, and the vibration response accuracy of the test piece is poor, for example, the test piece is supposed to need 10g of acceleration, but when 10g of acceleration is input on the vibration table, the acceleration is attenuated from the vibration table to the test piece, so that the acceleration reaching the test piece is only 9.5g; on the other hand, in a high temperature state, the natural frequency of the test piece can drift, if the natural frequency drifts to the working frequency range of the vibration test, the test piece can generate structural resonance point response (namely acceleration surge under a certain vibration frequency), the resonance point response is similar to an open loop control state, closed loop control of the control system can not be inhibited, and the test piece structure is in a test state, so that the test piece is damaged. Thus, it is important to control exactly how the test piece vibration response and also avoid the test piece resonance point response.
In view of this, one or more embodiments of the present application provide a high temperature force limited vibration test method. And (3) performing a vibration test of the test piece in a normal temperature environment, acquiring standard input vibration data of the force sensor capable of achieving target vibration data of the test piece, and acquiring standard vibration excitation input point data at a vibration excitation input point of the vibration table. Then, carrying out a vibration test of the test piece in a high-temperature environment, and regulating and limiting the input vibration data of the force sensor based on the standard input vibration data of the force sensor obtained in the normal-temperature vibration test; the vibration table is based on standard vibration excitation input point data obtained in a normal-temperature vibration test, and the vibration excitation data of the vibration excitation input point of the vibration table are regulated and limited, so that accurate control of vibration of a test piece in a high-temperature environment is realized by an indirect control method.
The following describes one or more embodiments of the present application in detail by way of specific examples.
A high-temperature force limit vibration test method is applied to a high-temperature force limit vibration test system. Referring to fig. 1, the system comprises a controller, a driving member, a vibration table 3, and a force sensor 2, wherein the vibration table 3 comprises a vibration excitation input point, the driving member is configured to input a vibration force to the vibration table 3 at the vibration excitation input point, the vibration table 3 is configured to output the vibration force and vibration excitation data, and the force sensor 2 is configured to transmit the vibration force to a test piece 1; the controller is configured to store target vibration data of the test piece 1 and receive a force signal input to the force sensor 2, and output input vibration data corresponding to the force signal.
Referring to fig. 2, the high temperature force limit vibration test method includes the steps of:
And 101, performing a normal-temperature vibration test on the test piece 1, and obtaining vibration data of the test piece 1.
In this step, a vibration test was performed at normal temperature. The driving member inputs vibration force to the vibration table 3 at the vibration excitation input point, the vibration table 3 outputs the vibration force and vibration excitation data, and the vibration force and the vibration excitation data are transmitted to the test member 1 through the force sensor 2 to obtain vibration data of the test member 1.
Step 102, in response to determining that the deviation value between the vibration data of the test piece 1 and the target vibration data of the test piece 1 is within a predetermined tolerance range, the input vibration data of the force sensor 2 is standard input vibration data, and the vibration excitation data of the vibration excitation input point of the vibration table 3 is standard vibration excitation input point data.
In this step, when the deviation value between the vibration data of the test piece 1 and the target vibration data of the test piece 1 is within the predetermined tolerance range, it can be considered that the vibration data of the test piece 1 at this time reaches the control standard, the input vibration data of the force sensor 2 at this time is the standard input vibration data, and the vibration excitation data of the vibration excitation input point of the vibration table 3 is the standard vibration excitation input point data, respectively. And the standard input vibration data is used as a control reference of the input vibration data of the force sensor 2 in the high-temperature vibration test, and the standard vibration excitation input point data is used as a control standard of the vibration excitation data of the vibration excitation input point of the vibration table 3 in the high-temperature vibration test.
And step 103, performing a high-temperature vibration test on the test piece 1 based on the standard input vibration data and the standard vibration excitation input point data.
In the step, a vibration test is carried out in a high-temperature environment, the vibration excitation input point of the vibration table 3 is used as a reference, and the vibration excitation data of the vibration excitation input point of the vibration table 3 is subjected to real-time limiting and adjustment, so that the vibration excitation data of the vibration excitation input point of the vibration table 3 can accord with the standard vibration excitation input point data, further the vibration data of the test piece 1 can accord with the target vibration data of the test piece, the deviation of the vibration data at the test piece 1 caused by the transmission characteristics such as force attenuation and increment is solved, and the purpose of indirectly controlling the vibration data of the test piece 1 is achieved. The force sensor 2 uses the standard input vibration data as a reference, and the input vibration data of the force sensor 2 is limited and regulated in real time, so that the input vibration data of the force sensor 2 can accord with the standard input vibration data, thereby avoiding the resonance response of the test piece 1 and preventing the test piece 1 from exceeding the test phenomenon.
In some embodiments, the target vibration data acquisition process of the test piece comprises: and determining target vibration data of the test piece 1 according to the force limit vibration test requirement. The test piece 1 target vibration data in this embodiment refers to ideal test piece 1 vibration data to be achieved by the test.
Referring to fig. 3, in some embodiments, the system further comprises a first control sensor 4, the first control sensor 4 being located on the test piece 1, the controller being further configured to receive the vibration data output by the first control sensor 4. The first control sensor 4 may be a sensor of the us Dytran3030B4, us Dytran 3054B type.
The normal temperature vibration test is performed on the test piece 1, and vibration data of the test piece 1 are obtained, including:
the vibration signals of the test piece 1 are collected in real time through the first control sensor 4 and output, and the controller receives the vibration signals output by the first control sensor 4 and outputs vibration data corresponding to the vibration signals to obtain the vibration data of the test piece 1.
And comparing the vibration data of the test piece 1 with the target vibration data of the test piece 1 by the controller to judge whether the deviation value between the vibration data of the test piece 1 and the target vibration data of the test piece 1 exceeds a specified tolerance range or not, so as to obtain the vibration data of the test piece 1 meeting the test requirement.
In response to determining that the deviation value between the vibration data of the test piece 1 and the target vibration data of the test piece 1 exceeds the predetermined tolerance range, the controller outputs a regulation instruction to the vibration table 3, regulating the vibration excitation data of the vibration excitation input point of the vibration table 3 until the deviation value between the vibration data of the test piece 1 and the target vibration data of the test piece 1 is within the predetermined tolerance range. The predetermined tolerance range of the vibration data of the test piece 1 and the target vibration data of the test piece 1 is +/-3 dB, and the vibration data of the test piece 1 can be considered to meet the test requirement when the predetermined tolerance range is +/-3 dB.
In general, the first control sensor 4 is adhered to the test piece 1, collects vibration signals of the test piece 1 in real time, inputs the vibration signals into the controller, outputs corresponding vibration data of the test piece 1, compares the vibration data with target vibration data of the test piece 1 stored in the controller, and adjusts the vibration excitation data of the vibration excitation input point of the vibration table in real time according to the comparison result so that a deviation value between the vibration data of the test piece 1 and the target vibration data of the test piece 1 is within a specified tolerance range.
Referring to fig. 3, in some embodiments, the process of acquiring the input vibration data of the force sensor 2 includes:
The vibration signals of the vibration table 3 are acquired in real time through the force sensor 2, the vibration signals are converted into the force signals and output, and the controller receives the force signals of the force sensor 2 and outputs input vibration data corresponding to the force signals.
In some embodiments, the force sensor 2 is a piezoelectric crystal force sensor. The piezoelectric crystal force sensor has the functions of collecting vibration signals, converting the vibration signals into force signals, regulating the force signals and the like, and the force sensor 2 can be a PMP4300 sensor and a PMP4400 sensor in the Druck brand in the United states.
Referring to fig. 3, in some embodiments, the system further comprises a measurement sensor 5, the measurement sensor 5 being located at a vibration excitation input point of the vibration table 3, the controller being further configured to receive the vibration excitation data output by the measurement sensor 5, obtain vibration excitation data of the vibration excitation input point of the vibration table 3, comprising:
And the vibration signals of the vibration excitation input points of the vibration table 3 are acquired and output in real time through the measurement sensor 5, and the controller receives the vibration signals output by the measurement sensor 5 and outputs the vibration excitation data corresponding to the vibration signals. The measurement sensor 5 may be the same as the first control sensor 4, and may have a function of acquiring a vibration signal in real time, and may be a sensor of the types us Dytran 3030B4 and us Dytran 3054B.
In some embodiments, after the obtaining the vibration excitation data of the vibration excitation input points of the vibration table 3, smoothing, tolerance estimating and enveloping the vibration excitation data of the vibration excitation input points of the vibration table 3, so that the vibration excitation data of the vibration excitation input points of the vibration table 3 more accords with the standard vibration excitation input point data.
In some embodiments, the vibration data of the test piece 1, the input vibration data of the force sensor 2, and the vibration excitation data of the vibration excitation input point of the vibration table 3 all include vibration accelerations. The application selects vibration data as vibration acceleration, which is convenient for visual display, analysis and regulation of force.
In some embodiments, the system further comprises a second control sensor 6, the second control sensor 6 being located at a vibration excitation input point of the vibration table 3, the controller further being configured to receive the vibration excitation data output by the second control sensor 6, the performing a high temperature vibration test on the test piece 1 based on the standard input vibration data and the standard vibration excitation input point data, comprising:
And the second control sensor 6 is used for collecting and outputting vibration signals of the vibration table 3 in real time, and the controller is used for receiving the vibration signals output by the second control sensor 6 and outputting vibration excitation data corresponding to the vibration signals to obtain the vibration excitation data of the vibration excitation input points of the vibration table 3. Comparing vibration excitation data of the vibration excitation input points of the vibration table 3 with the standard vibration excitation input point data. And regulating and controlling the deviation value between the vibration excitation data of the vibration excitation input point of the vibration table 3 and the standard vibration excitation input point data in real time within a preset tolerance range. The predetermined tolerance range of the vibration excitation data of the vibration excitation input point of the vibration table 3 and the standard vibration excitation input point data is ±3dB.
In the high-temperature vibration test, the driving piece is electrified, the high-temperature vibration test is started, and vibration excitation data of the vibration excitation input point of the vibration table 3 are regulated and controlled in real time so as to be in accordance with standard vibration excitation input point data. Specifically, the second control sensor 6 is attached to the vibration table 3, vibration signals of the vibration table 3 are collected in real time through the second control sensor 6, the vibration excitation data of vibration excitation input points of the vibration table 3 are input into the controller, the vibration excitation data of the vibration excitation input points of the vibration table 3 are output through the controller, the vibration excitation data of the vibration excitation input points of the vibration table 3 are compared with standard vibration excitation input point data, once deviation values between the vibration excitation data of the vibration excitation input points of the vibration table 3 and the standard vibration excitation input point data exceed a preset tolerance range, the controller outputs regulation instructions to the vibration table 3 until the deviation values between the vibration excitation data of the vibration excitation input points of the vibration table 3 and the standard vibration excitation input point data are within the preset tolerance range.
In the high-temperature vibration test, the input vibration data of the force sensor 2 is compared with the standard input vibration data. And regulating and controlling the deviation value between the input vibration data of the force sensor 2 and the standard input vibration data in real time within a preset tolerance range. The input vibration data of the force sensor 2 is within a predetermined tolerance range of + -3 dB from the standard input vibration data.
In the high-temperature vibration test, the input vibration data vibration excitation data of the force sensor 2 are regulated and controlled in real time through the cooperation of the controller and the force sensor 2 so as to enable the input vibration data vibration excitation data to meet the standard input vibration data. Specifically, vibration signals of the vibration table 3 are collected in real time through the force sensor 2, the vibration signals are converted into force signals to be output, and the controller receives the force signals of the force sensor 2 and outputs input vibration data of the force sensor 2 corresponding to the force signals. The controller compares the input vibration data of the force sensor 2 with the standard input vibration data of the force sensor 2 stored in the controller in advance, when the input vibration data of the force sensor 2 does not accord with the standard input vibration data, the controller gives a regulating and controlling instruction to be input into the force sensor 2, and the force sensor 2 regulates and controls the input vibration data into the standard input vibration data according to the instruction and then transmits the standard input vibration data into the test piece 1. The non-compliance here is typically: because the natural frequency of the test piece 1 shifts, the test piece 1 generates structural resonance point response, and the corresponding acceleration in the input vibration data of the force sensor 2 suddenly increases, and the force sensor 2 pulls the acceleration downwards to the acceleration in the standard input vibration data, so that the resonance response of the test piece 1 is avoided, and the test piece 1 is prevented from being over-tested.
In general, the present application combines the normal temperature vibration test of the test piece 1 to realize the high temperature vibration test of the test piece 1. The normal temperature vibration test and the high temperature vibration test are summarized as follows:
Referring to fig. 3, room temperature vibration test: the test piece 1 is arranged on the force sensor 2 according to the test requirement; a first control sensor 4 is stuck at a point on the test piece 1, which needs to be subjected to vibration monitoring, and a measuring sensor 5 is stuck at a vibration excitation input point of the vibration table 3; the first control sensor 4 of the monitoring point on the test piece 1 is used as a vibration control sensor to perform vibration test at normal temperature, standard input vibration data of the force sensor 2 are recorded, and standard vibration excitation input point data of the vibration excitation input point of the vibration table 3 are recorded.
Referring to fig. 4, high temperature vibration test: the test piece 1 is arranged on the force sensor 2 according to the test requirement; a second control sensor 6 is stuck at the vibration excitation input point of the vibration table 3, the vibration test at high temperature is carried out by taking the excitation input point of the vibration table 3 as a vibration control point through the second control sensor 6, the vibration excitation data of the vibration excitation input point of the vibration table 3 is controlled to be standard vibration excitation input point data, and the input vibration data of the force sensor 2 is controlled to be standard input vibration data.
Based on the same inventive concept, the application also provides a high-temperature force limit vibration test method system corresponding to the method in any embodiment, referring to fig. 5, comprising:
A normal temperature vibration test unit 21 configured to perform a normal temperature vibration test on the test piece 1 and obtain vibration data of the test piece 1;
A standard acquisition unit 22 configured to, in response to determining that a deviation value between vibration data of the test piece 1 and target vibration data of the test piece 1 is within a predetermined tolerance range, input vibration data of the force sensor 2 is standard input vibration data, and vibration excitation data of a vibration excitation input point of the vibration table 3 is standard vibration excitation input point data;
And a high-temperature vibration test unit 23 configured to perform a high-temperature vibration test on the test piece 1 based on the standard input vibration data and the standard vibration excitation input point data.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the application, are intended to be included within the scope of the application.
Those of ordinary skill in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to suggest that the scope of the application, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order and there are many other variations of the different aspects of the application as described above, which are not provided in detail for the sake of brevity.
The embodiments of the application are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present application should be included in the scope of the present application.
Claims (8)
1. A high temperature force limited vibration test method, characterized in that it is applied to a high temperature force limited vibration test system, the system comprising a controller, a driving member, a vibration table, a force sensor, the vibration table comprising a vibration excitation input point, the driving member being configured to input a vibration force to the vibration table at the vibration excitation input point, the vibration table being configured to output the vibration force and vibration excitation data, the force sensor being configured to conduct the vibration force to a test piece; the controller is configured to store target vibration data of the test piece, receive a force signal input to the force sensor, and output input vibration data corresponding to the force signal; the method comprises the following steps:
performing a normal-temperature vibration test on the test piece, and obtaining vibration data of the test piece;
In response to determining that a deviation value between vibration data of the test piece and target vibration data of the test piece is within a predetermined tolerance range, input vibration data of the force sensor is standard input vibration data, and vibration excitation data of a vibration excitation input point of the vibration table is standard vibration excitation input point data;
Performing a high-temperature vibration test on the test piece based on the standard input vibration data and the standard vibration excitation input point data;
The system further comprises a first control sensor, the first control sensor is located on the test piece, the controller is further configured to receive the vibration data output by the first control sensor, perform a normal temperature vibration test on the test piece, obtain vibration data of the test piece, and comprises:
The vibration signals of the test piece are collected in real time through the first control sensor and output, and the controller receives the vibration signals output by the first control sensor and outputs vibration data of the test piece corresponding to the vibration signals;
The system further includes a second control sensor located at a vibration excitation input point of the vibration table, the controller further configured to receive the vibration excitation data output by the second control sensor, and perform a high-temperature vibration test on the test piece based on the standard input vibration data and the standard vibration excitation input point data, including:
the second control sensor is used for collecting and outputting vibration signals of the vibration excitation input point of the vibration table in real time, and the controller is used for receiving the vibration signals output by the second control sensor and outputting vibration excitation data of the vibration excitation input point of the vibration table corresponding to the vibration signals;
Comparing the vibration excitation data of the vibration excitation input point of the vibration table with the standard vibration excitation input point data, and the input vibration data of the force sensor with the standard input vibration data;
And regulating and controlling the deviation value between the vibration excitation data of the vibration excitation input point of the vibration table and the standard vibration excitation input point data in real time, and regulating and controlling the deviation value between the input vibration data of the force sensor and the standard input vibration data within the preset tolerance range.
2. The high temperature force limit vibration testing method according to claim 1, wherein the target vibration data acquisition process of the test piece comprises: and determining target vibration data of the test piece according to the force limit vibration test requirement.
3. The high temperature force limit vibration test method of claim 1, wherein the process of obtaining the input vibration data of the force sensor comprises:
And the controller receives the force signal of the force sensor and outputs input vibration data corresponding to the force signal.
4. The high temperature force limited vibration testing method of claim 1, wherein the system further comprises a measurement sensor located at a vibration excitation input point of the vibration table, the controller further configured to receive the vibration excitation data output by the measurement sensor, obtain vibration excitation data of the vibration excitation input point of the vibration table, comprising:
And the controller receives the vibration signal output by the measurement sensor and outputs the vibration excitation data corresponding to the vibration signal.
5. The high temperature force limit vibration testing method according to claim 1, further comprising, after the obtaining of the vibration excitation data of the vibration excitation input points of the vibration table, smoothing, tolerance estimating, and enveloping the vibration excitation data of the vibration excitation input points of the vibration table to obtain the standard vibration excitation input point data.
6. The high temperature force limited vibration testing method of claim 1, wherein the vibration data of the test piece, the input vibration data of the force sensor, and the vibration excitation data of the vibration excitation input point of the vibration table each comprise a vibration acceleration.
7. The high temperature force limited vibration testing method according to claim 1, wherein the predetermined tolerance range of the vibration data of the test piece and the target vibration data of the test piece is ±3dB.
8. The high temperature force limited vibration testing method of claim 1, wherein the force sensor is a piezoelectric crystal force sensor.
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