CN114034456B - Automatic control device and method for drop test - Google Patents
Automatic control device and method for drop test Download PDFInfo
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- CN114034456B CN114034456B CN202111296328.9A CN202111296328A CN114034456B CN 114034456 B CN114034456 B CN 114034456B CN 202111296328 A CN202111296328 A CN 202111296328A CN 114034456 B CN114034456 B CN 114034456B
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- lifting
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- falling body
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- body system
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000003068 static effect Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000009863 impact test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01M7/08—Shock-testing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to an automatic control device and a method for a drop test, wherein the device comprises a rack, an impact platform, a lifting system and a drop system; the lifting system consists of a measuring mechanism, a driving mechanism and a locking mechanism, and the falling system consists of a loading mechanism and a lifting mechanism; the rack is fixedly connected to the upper surface of the impact platform, the driving mechanism is connected to the bottom of the upper surface of the rack, the locking mechanism is connected to the lower portion of the driving mechanism, the measuring mechanism is connected to the top of the driving mechanism and the bottom of the locking mechanism, the load mechanism is connected to the bottom of the locking mechanism, and the lifting mechanism is connected to the lower portion of the load mechanism. The method comprises the steps of calibration, resetting, lifting, throwing, judging, terminating and the like; the invention skillfully utilizes the characteristic position of the falling body system in the falling body test, can realize the automatic operation of the falling body test based on the position feedback control, reduces the risk of personnel participation, improves the test efficiency and reliability, and can be applied to the automatic implementation of the falling body test of the lifting mechanism in the aerospace field.
Description
Technical Field
The invention relates to the technical field of aerospace, in particular to an automatic control device and method for a drop test.
Background
The landing gear is widely applied to the technical field of aerospace, is used for absorbing and dissipating impact energy when a machine body lands (or lands on a ship), and plays a vital role in ensuring the safety of the machine body. The purpose of the drop test is to verify whether the design parameters and the structural reliability of the drop test meet the design requirements through the impact test of the lifting mechanism. Drop tests are dynamic impact tests, are relatively high in complexity and risk, and if multiple drop tests are used to verify the damage tolerance or fatigue durability of the landing gear, the existing manual operation test mode is undoubtedly a high-cycle, high-cost and low-efficiency mode.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an automatic control device and method for a drop test, and the method ingeniously utilizes the characteristic position of a drop system in the drop test, can realize the automatic operation of the drop test based on position feedback control, reduces the risk of personnel participation, improves the test efficiency and reliability, and can be applied to the automatic implementation of the drop test of a lifting mechanism in the aerospace field.
The technical scheme adopted by the invention is as follows:
the invention provides an automatic control device for a drop test, which comprises a rack, an impact platform, a lifting system and a drop system, wherein the rack is arranged on the impact platform; the lifting system consists of a measuring mechanism, a driving mechanism and a locking mechanism; the falling body system consists of a load mechanism and a lifting mechanism; the rack is fixedly connected to the upper surface of the impact platform, the driving mechanism is connected to the lower surface of the top end of the rack, the locking mechanism is connected below the driving mechanism, and the measuring mechanism is arranged between the top of the connecting driving mechanism and the bottom of the locking mechanism; the load mechanism is connected to the bottom of the locking mechanism, and the lifting mechanism is connected to the lower part of the load mechanism.
An automatic control method for a drop test is characterized by comprising the following steps of: the method comprises the following steps:
step S1: calibrating a reset position, a base point position and a vertex position;
step S2: returning the falling body system to the reset position;
step S3: lifting the falling body system to the vertex position;
step S4: disconnecting the lifting system locking mechanism to enable the falling system to fall to the impact plane;
step S5: judging whether the number of times of vibration falling meets the requirement;
step S6: and (5) ending the test.
Further, the specific process of step S1 is as follows:
(1.1) calibration of reset position: when the falling body system is statically parked on the impact platform, namely the falling body system bears 1 time of gravity, the position of the falling body system is calibrated to be a reset position through the measuring mechanism;
(1.2) calibrating the base point position: lifting the falling body system, so that when the lifting mechanism just leaves or contacts the impact platform, the position of the falling body system at the moment is calibrated to be a base point position through the measuring mechanism;
(1.3) vertex position calibration: and continuously lifting the falling body system, so that the distance between the falling body system and the base point is equal to the falling vibration height, and calibrating the position of the falling body system at the moment as the vertex position through the measuring mechanism.
Further, the specific process of step S2 is as follows:
(2.1) controlling the lifting system to move to a calibrated reset position according to the position deviation;
(2.2) locking the locking mechanism of the lifting system with the falling body system.
Further, the specific process of step S3 is as follows:
(3.1) controlling the lifting system to drive the falling body system to lift to a calibrated vertex position according to the position deviation;
(3.2) ensuring that the locking mechanism of the lifting system remains locked.
Further, the specific process of step S4 is as follows:
(4.1) keeping the lifting system and the falling system in a static state at the vertex position;
(4.2) unlocking the locking mechanism of the lifting system, and enabling the falling system to fall to the impact platform.
Further, the specific process of step S5 is as follows:
(5.1) when the number of times of earthquake falling reaches the requirement, entering a step S6 to terminate;
and (5.2) when the number of times of vibration falling does not reach the requirement, entering a step S2 for resetting.
Further, the specific process of step S6 is as follows:
(6.1) enabling the lifting system to stay at the vertex position;
(6.2) maintaining the locking mechanism of the lifting system in an unlocked state.
Compared with the prior art, the invention has the following beneficial effects:
the method provided by the invention is based on position feedback, can realize automatic operation of the drop test, reduces the risk of personnel participation, improves the test efficiency and reliability, and can be applied to automatic implementation of the drop test of the landing gear in the aerospace field.
Drawings
FIG. 1 is a flow chart of an automatic control device and method for a drop test according to the present invention;
fig. 2 is a schematic diagram of the structure of each system in the drop test.
Wherein, the reference numerals: 1-a rack; 2-an impact platform; 3-a driving mechanism; a 4-locking mechanism; 5-a load mechanism; 6-a landing gear; 7-measuring means.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "top", "bottom", "one side", "another side", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be configured and operated in a specific orientation.
Referring to fig. 2, a specific structure of an embodiment of an automatic control device for a drop test according to the present invention is shown. The device mainly comprises a rack 1, an impact platform 2, a lifting system and a falling body system; the lifting system consists of a driving mechanism 3, a locking mechanism 4 and a measuring mechanism 7; the falling system consists of a load mechanism 5 and a lifting mechanism 6; the rack 1 is fixedly connected to the upper surface of the impact platform 2, the driving mechanism 3 is connected to the lower surface of the top end of the rack 1, the locking mechanism 4 is connected to the bottom end of the driving mechanism 3, and the measuring mechanism 7 is connected between the top of the driving mechanism 3 and the bottom of the locking mechanism 4; the load mechanism 5 is connected to the bottom of the locking mechanism 4, and the lifting mechanism 6 is connected below the load mechanism 5.
The rack 1 provides support for the whole set of test device; the impact platform 2 simulates a landing impact plane of a landing gear; the driving mechanism 3 is a part of a lifting system and provides lifting driving force; the locking mechanism 4 is a part of the lifting system and is responsible for locking and unlocking the falling body system and the lifting system; the load mechanism 5 is a part of a falling body system and simulates the load of a lifting mechanism; the lifting mechanism 6 is a part of a falling body system and is a test piece to be tested; the measuring means 7 are part of a lifting system for measuring and calibrating position information.
Referring to fig. 1, the automatic control method for the drop test specifically comprises the following steps:
step S1: calibrating a reset position, a base point position and a vertex position; the specific implementation process is as follows:
(1) Calibrating a reset position: maintaining the locking mechanism 4 in a locked state, and locking the lifting system (the driving mechanism 3, the locking mechanism 4 and the measuring mechanism 7) and the falling system (the loading mechanism 5 and the lifting mechanism 6); operating the driving mechanism 3 to enable the falling body system to be static parked on the impact platform 2, enabling the vertical direction of the falling body system to bear only self gravity, calibrating the position of the falling body system at the moment to be a reset position through the measuring mechanism 7, and enabling the position to be 1 meter high;
(2) Calibrating the base point position: maintaining the locking mechanism 4 in a locked state; operating the driving mechanism 3 to lift the falling body system, enabling the lifting mechanism 6 to just leave or contact the impact platform 2, and calibrating the position of the falling body system at the moment to be a base point position through the measuring mechanism 7, wherein the position height is 1.1 meters;
(3) Vertex position calibration: maintaining the locking mechanism 4 in a locked state; operating the driving mechanism 3 to continuously lift the falling body system, so that the distance from the falling body system to the base point position is equal to the falling vibration height, and calibrating the falling body system position to be the vertex position by the measuring mechanism 7 by assuming that the falling vibration height is 0.4 meter, wherein the position height is 1.5 meters;
(4) And (5) finishing the calibration.
Step S2: controlling the falling body system (the lifting mechanism 6 and the loading mechanism 5) to return to the reset position according to the position deviation; the specific implementation process is as follows:
(1) The test starts, the deviation between the lifting system and the reset position is measured through the measuring mechanism 7, and the driving mechanism 3 enables the lifting system to move to the calibrated reset position through position feedback control, wherein the height is 1.1 m;
(2) After the lifting system is in place, the locking mechanism 4 is locked with the falling system;
step S3: controlling the falling body system to the vertex position according to the position deviation; the specific implementation process is as follows:
(1) The deviation between the lifting system and the vertex position is measured by using a measuring mechanism 7, and the lifting system drives the falling system to be lifted to a calibrated vertex position by the driving mechanism 3 through position feedback control, wherein the height is 1.5 meters;
(2) The locking mechanism 3 of the lifting system keeps a locking state;
step S4: disconnecting the lifting system locking mechanism to enable the falling system to fall to the impact plane; the specific implementation process is as follows:
(1) Keeping the lifting system and the falling system in a static state at the vertex position for 10 seconds;
(2) The locking mechanism 4 of the lifting system is unlocked, and the falling system falls to the impact platform 2;
(3) And (3) completing a drop test, wherein the drop times are increased by 1.
Step S5: judging whether the number of times of vibration falling meets the requirement; the specific implementation process is as follows:
(1) When the number of times of earthquake falling reaches the requirement, entering a step S6 to terminate;
(2) When the number of times of vibration falling does not meet the requirement, the step S2 is entered for resetting;
step S6: ending the test;
(1) The lifting system stays at the vertex position;
(2) The locking mechanism 4 of the lifting system keeps an unlocked state;
(3) And (5) ending the drop test.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the design of the present invention.
Claims (5)
1. A control method of an automatic control device for a drop test is characterized by comprising the following steps: the device comprises a rack, an impact platform, a lifting system and a falling system; the lifting system consists of a measuring mechanism, a driving mechanism and a locking mechanism; the falling body system consists of a load mechanism and a lifting mechanism; the rack is fixedly connected to the upper surface of the impact platform, the driving mechanism is connected to the lower surface of the top end of the rack, the locking mechanism is connected below the driving mechanism, and the measuring mechanism is arranged between the top of the connecting driving mechanism and the bottom of the locking mechanism; the load mechanism is connected to the bottom of the locking mechanism, and the lifting mechanism is connected below the load mechanism;
the method comprises the following steps:
step S1: calibrating a reset position, a base point position and a vertex position;
step S2: returning the falling body system to the reset position;
step S3: lifting the falling body system to the vertex position;
step S4: disconnecting the lifting system locking mechanism to enable the falling system to fall to the impact plane;
step S5: judging whether the number of times of vibration falling meets the requirement;
step S6: ending the test;
the specific process of the step S1 is as follows:
(1.1) calibration of reset position: when the falling body system is statically parked on the impact platform, namely the falling body system bears 1 time of gravity, the position of the falling body system is calibrated to be a reset position through the measuring mechanism;
(1.2) calibrating the base point position: lifting the falling body system, so that when the lifting mechanism just leaves or contacts the impact platform, the position of the falling body system at the moment is calibrated to be a base point position through the measuring mechanism;
(1.3) vertex position calibration: continuously lifting the falling body system to enable the distance between the falling body system and the base point position to be equal to the falling vibration height, and calibrating the position of the falling body system at the moment to be the vertex position through the measuring mechanism;
the specific process of the step S2 is as follows:
(2.1) controlling the lifting system to move to a calibrated reset position according to the position deviation;
(2.2) locking the locking mechanism of the lifting system with the falling body system.
2. The control method according to claim 1, characterized in that: the specific process of the step S3 is as follows:
(3.1) controlling the lifting system to drive the falling body system to lift to a calibrated vertex position according to the position deviation;
(3.2) ensuring that the locking mechanism of the lifting system remains locked.
3. The control method according to claim 2, characterized in that: the specific process of the step S4 is as follows:
(4.1) keeping the lifting system and the falling system in a static state at the vertex position;
(4.2) unlocking the locking mechanism of the lifting system, and enabling the falling system to fall to the impact platform.
4. A control method according to claim 3, characterized in that: the specific process of the step S5 is as follows:
(5.1) when the number of times of earthquake falling reaches the requirement, entering a step S6 to terminate;
and (5.2) when the number of times of vibration falling does not reach the requirement, entering a step S2 for resetting.
5. The control method according to claim 4, characterized in that: the specific process of the step S6 is as follows:
(6.1) enabling the lifting system to stay at the vertex position;
(6.2) maintaining the locking mechanism of the lifting system in an unlocked state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111296328.9A CN114034456B (en) | 2021-11-03 | 2021-11-03 | Automatic control device and method for drop test |
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| CN202111296328.9A CN114034456B (en) | 2021-11-03 | 2021-11-03 | Automatic control device and method for drop test |
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| CN114034456B true CN114034456B (en) | 2024-03-01 |
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| CN116986014B (en) * | 2023-09-27 | 2023-12-12 | 中国飞机强度研究所 | Device and method for adjusting and maintaining aircraft posture in full-aircraft drop test |
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