CN101979883A - Loaded piston deflection test system and test method for large-sized servo hydraulic cylinder - Google Patents
Loaded piston deflection test system and test method for large-sized servo hydraulic cylinder Download PDFInfo
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- CN101979883A CN101979883A CN2010105159849A CN201010515984A CN101979883A CN 101979883 A CN101979883 A CN 101979883A CN 2010105159849 A CN2010105159849 A CN 2010105159849A CN 201010515984 A CN201010515984 A CN 201010515984A CN 101979883 A CN101979883 A CN 101979883A
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Abstract
The invention relates to a loaded piston deflection test system and a loaded piston deflection test method for a large-sized servo hydraulic cylinder. The technical scheme is that: a hydraulic pump (11) is communicated with a port P of an electro-hydraulic servo valve (16); the large-sized servo hydraulic cylinder (18) is arranged in a closed frame (17); a rod-less cavity is connected with the port A or B of the electro-hydraulic servo valve (16); a rod cavity is connected with a low pressure pump; displacement sensors (1, 5) and pressure sensors (2, 9), which are arranged on the large-sized servo hydraulic cylinder (18), are electrically connected with the input channel of a data acquisition card (6) respectively; the pressure sensor (9) is electrically connected with a controller (8); one end of a servo amplifier (10) is electrically connected with the output channel of the data acquisition card (6) by the controller (8); the other end of the servo amplifier (10) is electrically connected with the control coil of the electro-hydraulic servo valve (16); the data acquisition card (6) and computer aided testing software (7) are arranged in a computer; and a cushion block is arranged between the closed frame (17) and a piston rod. The system has the advantages of simple structure, closeness to the actual working condition, accurate test result and high automation degree.
Description
Technical field
The invention belongs to the oil hydraulic cylinder technical field of measurement and test, be specifically related to a kind of large-scale servo hydraulic cylinder band and carry piston beat test system and test method thereof.
Background technique
Hydraulic system has that power is big, response is fast, precision advantages of higher and be widely used in the significant points of the equipment of industrial product.Large-scale servo hydraulic cylinder has higher service behaviour, in strict hydraulic control system, is a kind of desirable actuator therefore.But the servo hydraulic cylinder that diameter is bigger, owing to reasons such as processing, installation, uses, can cause its piston generation beat in the course of the work, easily make large-scale servo hydraulic cylinder produce concentrated wear, cause hydraulic fluid leak, reduce working life, even cisco unity malfunction, therefore large-scale servo hydraulic cylinder band carried very necessity of piston beat test.
At present domestic method to large-scale servo hydraulic cylinder piston beat test mainly is: tested large-scale servo hydraulic cylinder is placed on the test bench, piston rod vertically upward, the hydraulic fluid port that connects large-scale servo hydraulic cylinder, rod chamber adds back pressure, rodless cavity is controlled fuel feeding by electrohydraulic control, before the test piston retraction is arrived bottom the cylinder barrel, then the installation position displacement sensor.Two the large-scale relatively servo hydraulic cylinder of same model displacement transducer center symmetries are installed on the cylinder barrel, and the relative displacement to cylinder barrel and piston rod detects respectively, and sensor signal is guided in the computer.During test, the rodless cavity fuel feeding promotes piston and piston rod and moves up, and calculates the displacement signal of gathering displacement transducer simultaneously, and draw two displacement diagrams, calculate the maximum difference of two curve displacements, this value is called the maximum beat value of tested large-scale servo hydraulic cylinder piston (Huang Zhiwu, Guo Ai, Liu Liming, Chen Xinyuan, profound from prosperous, pair dawn, the high precision measurement method research of servo hydraulic cylinder piston beat, hydraulic pressure and pneumatic, 2010,8, P25).There is following point in said method: (1) it draws out is displacement-time curve, in zero load, carry out, in the actual conditions, large-scale servo hydraulic cylinder is that band carries, and the amount that directly causes the piston beat to produce is a loading force, and therefore displacement-time response curve of being drawn can not reflect the real conditions of tested large-scale servo hydraulic cylinder piston beat; What (2) adopt in the above-mentioned test method is Displacement Feedback, at first give the certain overhang of piston rod, and supposition large-scale servo hydraulic cylinder piston beat amount at this moment is 0, in piston rod displacement-time response curve of drawing with this overhang as the displacement reference origin, but in actual detected, there is beat at this moment, therefore influenced the accurate measurement of piston beat.
Summary of the invention
The present invention is intended to solve existing technological deficiency, purpose provide a kind of system architecture simple, carry piston beat test system and test method thereof near actual conditions, test result is accurate and automaticity is high large-scale servo hydraulic cylinder band.
For achieving the above object, the technological scheme that test system of the present invention adopts is: the inlet port of oil hydraulic pump communicates with fuel tank, the oil outlet of oil hydraulic pump communicates with the P mouth of electrohydraulic control by filter, the T mouth of electrohydraulic control communicates with fuel tank, is connected with electromagnetic relief valve between the P of electrohydraulic control mouth pressuring oil pipe and T mouth return tube; The A mouth of electrohydraulic control communicates with the rodless cavity of tested large-scale servo hydraulic cylinder, the B mouth sealing of electrohydraulic control, or the B mouth of electrohydraulic control communicates the A mouth sealing of electrohydraulic control with the rodless cavity of tested large-scale servo hydraulic cylinder; The rod chamber of tested large-scale servo hydraulic cylinder communicates with low pressure pump; Tested large-scale servo hydraulic cylinder is installed in the closed frame, and cushion block is laid in the piston rod upper end of tested large-scale servo hydraulic cylinder.
On the cylinder barrel of the rod chamber end of tested large-scale servo hydraulic cylinder, the center is provided with the first sensor support and second sensor stand symmetrically, between first sensor support and piston rod upper-end surface, be fixed with first displacement transducer, be fixed with second displacement transducer between second sensor stand and piston rod upper-end surface, second displacement transducer is identical with first displacement transducer; Second displacement transducer is electrically connected with the A/D-2 passage of data collecting card, and first displacement transducer is electrically connected with the A/D-3 passage of data collecting card; The rod chamber hydraulic fluid port of large-scale servo hydraulic cylinder and rodless cavity hydraulic fluid port respectively correspondence first pressure transducer and second pressure transducer are housed, first pressure transducer is identical with second pressure transducer, first pressure transducer is electrically connected with the A/D-1 passage of data collecting card, and second pressure transducer is electrically connected with the A/D-4 passage of data collecting card and an end of controller respectively; One end of servoamplifier is electrically connected with the control coil of electrohydraulic control, and the other end of servoamplifier is electrically connected with data collecting card D/A-1 passage by controller, and data collecting card and computer aided testing software are installed in the computer.
In technique scheme, the main flow of described computer aided testing software is:
S1-1, initializing variable, timing point n=0, target setting loading force F, control voltage u
0Incremental change with control voltage
Δu；
S1-2, by D/A-1 passage output control voltage u
N+1=u
n+ Δ u, wherein: u
nBe the control voltage of the n time output of D/A-1 passage, Δ u is the difference of the n+1 time output control voltage and the n time output control voltage, promptly controls the incremental change of voltage;
S1-3, the timing point n=n+1 that adds up;
S1-4, scan A/D-1 record the voltage U of bar cavity pressure corresponding conversion
A/D-1, calculate the rod chamber hydraulic action
Scan A/D-2, the voltage U of recording and analyses bar left side displacement corresponding conversion
A/D-2, calculate piston rod left side displacement
Scan A/D-3, the voltage U of recording and analyses bar right side displacement corresponding conversion
A/D-3, calculate piston rod right side displacement
Scan A/D-4, the voltage U of record rodless cavity pressure corresponding conversion
A/D-4, calculate the rodless cavity hydraulic action
In S1-4: U
A/D-1, U
A/D-2, U
A/D-3, U
A/D-4It is respectively the magnitude of voltage of data collecting card A/D-1, A/D-2, A/D-3, A/D-4 passage; K
1, K
2Be respectively the sensitivity of pressure transducer and displacement transducer, be power gain again;
A
1, A
2Be respectively tested large-scale servo hydraulic cylinder rod chamber effective pressure area and tested large-scale servo hydraulic cylinder rodless cavity effective pressure area.
S1-5, judgement F
N2-F
N1Whether greater than target loading force F, if greater than then carrying out next step, if less than then returning S1-2;
S1-6, the proportionate relationship of pressing diameter of piston rod and piston diameter, with the absolute value of piston rod both sides displacement difference | S
N1-S
N2| be converted to piston beat amount S, then with the suffered loading force F of large-scale servo hydraulic cylinder
N2-F
N1Be abscissa, piston beat amount S is a y coordinate, draws large-scale servo hydraulic cylinder piston beat amount-loading force characteristic curve.
The maximum load capacity of described closed frame is greater than the nominal load-bearing capacity of tested large-scale servo hydraulic cylinder.
The loading force of described tested large-scale servo hydraulic cylinder is less than or equal to its nominal load-bearing capacity.
Large-scale servo hydraulic cylinder band of the present invention carries the test method of piston beat test system and the steps include:
S2-1, startup computer are opened computer aided testing software;
S2-2, starting electrical machinery, the oil hydraulic pump low load operation is progressively set up the pressure of electromagnetic relief valve, and hydraulic system is started working;
S2-3, parameter is set in computer aided testing software: tested large-scale servo hydraulic cylinder target loading force F, control voltage u
0, control voltage incremental change Δ u and timing point n;
S2-4, begin test, wait for that large-scale servo hydraulic cylinder band carries the result of piston beat test;
S2-5, the deposit of tested large-scale servo hydraulic cylinder piston beat amount-loading force characteristic curve is printed;
S2-6, disable motor, hydraulic system quits work;
S2-7, withdraw from computer aided testing software, shut down computer.
Owing to adopt technique scheme, the present invention have system architecture simple, near actual conditions, test result is accurate and automaticity is high advantage, be in particular in:
1, electrohydraulic control carries out the pressure adjusting, and pressure transducer carries out Pressure testing, and displacement transducer carries out displacement detecting, and computer aided testing software is handled test result, and system architecture is simple.
2, in this test system, place cushion block between the piston rod of tested large-scale servo hydraulic cylinder and frame, the deformation force of frame and cushion block acts on on the tested large-scale servo-hydraulic cylinder piston rod, the actual conditions of so more approaching large-scale servo hydraulic cylinder.
3, export the slope control signal by the D/A-1 passage of computer aided testing software, via controller adjustment gain, the current signal that is converted to power amplification by servoamplifier drives the electromagnet of electrohydraulic control, thereby controls the piston motion of tested large-scale servo hydraulic cylinder; The detected piston pressure of pressure transducer signal feed back is given controller simultaneously, to constitute the power closed loop control system, can accurately measure large-scale servo hydraulic cylinder piston beat amount-loading force characteristic.
4, computer aided testing software sends signal by the D/A-1 passage in whole test process, pressure signal by A/D passage recorded bit displacement sensor detected piston rod both sides displacement signal and large-scale servo hydraulic cylinder two chambeies, and calculate by computer aided testing software, and draw out tested large-scale servo hydraulic cylinder piston beat amount-loading force characteristic curve, so the automaticity height.
The accurate test that accurate test, the especially rolling mill hydraulic of the large-scale servo hydraulic cylinder piston beat that suitable all the internal diameter 700mm of the present invention are above depressed (AGC) large-scale servo hydraulic cylinder piston beat.
Description of drawings
Fig. 1 is a kind of test system schematic representation of the present invention;
Fig. 2 is the main flow block diagram of the computer aided testing software 7 among Fig. 1;
Fig. 3 is a kind of test result schematic representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention being further described, is not the restriction to protection domain:
A kind of large-scale servo hydraulic cylinder band carries piston beat test system and test method thereof, this test system is as shown in Figure 1: the inlet port of oil hydraulic pump 11 communicates with fuel tank 13, the oil outlet of oil hydraulic pump 11 communicates with the P mouth of electrohydraulic control 16 by filter 14, the T mouth of electrohydraulic control 16 communicates with fuel tank 13, is connected with electromagnetic relief valve 15 between the P of electrohydraulic control 16 mouth pressuring oil pipe road and T mouth return line; The A mouth of electrohydraulic control 16 communicates with the rodless cavity of tested large-scale servo hydraulic cylinder 18, the B mouth sealing of electrohydraulic control 16, or the B mouth of electrohydraulic control 16 communicates the A mouth sealing of electrohydraulic control 16 with the rodless cavity of tested large-scale servo hydraulic cylinder 18; The rod chamber of tested large-scale servo hydraulic cylinder 18 communicates with low pressure pump; Tested large-scale servo hydraulic cylinder 18 is installed in the closed frame 17, and cushion block 3 is laid in the piston rod of tested large-scale servo hydraulic cylinder 18 upper end.
On the cylinder barrel of the rod chamber end of tested large-scale servo hydraulic cylinder 18, the center is provided with the first sensor support 4 and second sensor stand 19 symmetrically, between first sensor support 4 and piston rod upper-end surface, be fixed with first displacement transducer 5, it is identical with first displacement transducer 5 to be fixed with second displacement transducer, 1, the second displacement transducer 1 between second sensor stand 19 and piston rod upper-end surface; Second displacement transducer 1 is electrically connected with the A/D-2 passage of data collecting card 6, and first displacement transducer 5 is electrically connected with the A/D-3 passage of data collecting card 6; The rod chamber hydraulic fluid port of large-scale servo hydraulic cylinder 18 and rodless cavity hydraulic fluid port respectively correspondence first pressure transducer 2 and second pressure transducer 9 are housed, first pressure transducer 2 is identical with second pressure transducer 9, first pressure transducer 2 is electrically connected with the A/D-1 passage of data collecting card 6, and second pressure transducer 9 is electrically connected with the A/D-4 passage of data collecting card 6 and an end of controller 8 respectively; One end of servoamplifier 10 is electrically connected with the control coil of electrohydraulic control 16, and the other end of servoamplifier 10 is electrically connected with the D/A-1 passage of data collecting card 6 by controller 8, and data collecting card 6 and computer aided testing software 7 are installed in the computer.
The main flow of the described computer aided testing software 7 of this embodiment is as shown in Figure 2:
S1-1, initializing variable, timing point n=0, target setting loading force F, control voltage u
0Incremental change Δ u with control voltage;
S1-2, by D/A-1 passage output control voltage u
N+1=u
n+ Δ u, wherein: u
nBe the control voltage of the n time output of D/A-1 passage, Δ u is the difference of the n+1 time output control voltage and the n time output control voltage, promptly controls the incremental change of voltage;
S1-3, the timing point n=n+1 that adds up;
S1-4, scan A/D-1 record the voltage U of bar cavity pressure corresponding conversion
A/D-1, calculate the rod chamber hydraulic action
Scan A/D-2, the voltage U of recording and analyses bar left side displacement corresponding conversion
A/D-2, calculate piston rod left side displacement
Scan A/D-3, the voltage U of recording and analyses bar right side displacement corresponding conversion
A/D-3, calculate piston rod right side displacement
Scan A/D-4, the voltage U of record rodless cavity pressure corresponding conversion
A/D-4, calculate the rodless cavity hydraulic action
In S1-4: U
A/D-1, U
A/D-2, U
A/D-3, U
A/D-4It is respectively the magnitude of voltage of data collecting card A/D-1, A/D-2, A/D-3, A/D-4 passage; K
1, K
2Be respectively the sensitivity of pressure transducer and displacement transducer, be power gain again; A
1, A
2Be respectively tested large-scale servo hydraulic cylinder rod chamber effective pressure area and tested large-scale servo hydraulic cylinder rodless cavity effective pressure area.
S1-5, judgement F
N2-F
N1Whether greater than target loading force F, if greater than then carrying out next step, if less than then returning S1-2;
S1-6, the proportionate relationship of pressing diameter of piston rod and piston diameter, with the absolute value of piston rod both sides displacement difference | S
N1-S
N2| be converted to piston beat amount S, then with the suffered loading force F of large-scale servo hydraulic cylinder
N2-F
N1Be abscissa, piston beat amount S is a y coordinate, draws large-scale servo hydraulic cylinder piston beat amount-loading force characteristic curve.
The maximum load capacity of the closed frame 17 in this embodiment is greater than the nominal load-bearing capacity of tested large-scale servo hydraulic cylinder 18; The loading force of tested large-scale servo hydraulic cylinder 18 is less than or equal to its nominal load-bearing capacity.
Test method and testing procedure thereof that the described large-scale servo hydraulic cylinder band of present embodiment carries piston beat test system are:
S2-1, startup computer are opened computer aided testing software 7;
S2-2, starting electrical machinery 12, oil hydraulic pump 11 low load operations are progressively set up the pressure of electromagnetic relief valve 15, and hydraulic system is started working;
S2-3, parameter is set in computer aided testing software 7: tested large-scale servo hydraulic cylinder 18 target loading force F, control voltage u
0, control voltage incremental change Δ u and timing point n;
S2-4, begin test, wait for that large-scale servo hydraulic cylinder 18 bands carry the result of piston beats test;
S2-5, the deposit of tested large-scale servo hydraulic cylinder 18 piston beat amounts-loading force characteristic curve is printed;
S2-6, disable motor 12, hydraulic system quits work;
S2-7, withdraw from computer aided testing software 7, shut down computer.
In this embodiment, the working pressure of this test system is P=25MPa, and back pressure is P
b=5MPa,, the maximum load capacity of closed frame 17 is 50000KN; Motor 12 is the Y250M-4 cage type asynchronous motor, oil hydraulic pump 11 is the A4VSOMA/70R-PPB13N00N Variable plunger pump, filter 14 is DFB-H60 * 10C filter, electrohydraulic control 16 is the D661G75HOCO6NSX2HO electrohydraulic control, electromagnetic relief valve 15 is the DBW20B-2-30B/315G24NZ5L electromagnetic relief valve, displacement transducer 1,5 is the FX-5 displacement transducer, pressure transducer 2,9 is the HDA3845-B-250-0000 pressure transducer, data collecting card 6 is the PCI-9118 data collecting card, and the internal diameter of cylinder of tested large-scale servo hydraulic cylinder 18 is 1500mm.
Piston beat amount-loading force characteristic curve that the test result of this embodiment is drawn as shown in Figure 3, getting the maximum beat amount of tested large-scale servo hydraulic cylinder 18 pistons by COMPUTER CALCULATION is 0.030mm.
This embodiment is by the D/A-1 passage output slope control signal of computer aided testing software 7, via controller 8 is adjusted gain, the current signal that is converted to power amplification by servoamplifier 10 drives the electromagnet of electrohydraulic control 16, thereby controls the piston motion of tested large-scale servo hydraulic cylinder 18; Pressure transducer 9 detects the rodless cavity pressure signal and feeds back to controller simultaneously, to constitute the power closed loop control system, can accurately measure large-scale servo hydraulic cylinder 18 piston beat amount-loading force characteristics.
Computer aided testing software 7 sends signal by the D/A-1 passage in whole test process, pressure signal by A/D passage recorded bit displacement sensor 1,5 detected piston rod both sides displacement signals and 2,9 detected large-scale servo hydraulic cylinders, two chambeies, and calculate and draw out the piston beat amount-loading force characteristic curve of tested large-scale servo hydraulic cylinder by computer aided testing software 7, so the automaticity height.
This embodiment is fit to the accurate test of the piston beat of the above large-scale servo hydraulic cylinder of all internal diameter 700mm, the accurate test of especially large diameter milling train being depressed (AGC) large-scale servo hydraulic cylinder piston beat.
Claims (5)
1. one kind large-scale servo hydraulic cylinder band carries piston beat test system, the inlet port that it is characterized in that oil hydraulic pump [11] communicates with fuel tank [13], the oil outlet of oil hydraulic pump [11] communicates by the P mouth of filter [14] with electrohydraulic control [16], the T mouth of electrohydraulic control [16] communicates with fuel tank [13], is connected with electromagnetic relief valve [15] between the P mouth pressuring oil pipe of electrohydraulic control [16] and T mouth return tube; The A mouth of electrohydraulic control [16] communicates with the rodless cavity of tested large-scale servo hydraulic cylinder [18], the B mouth sealing of electrohydraulic control [16], or the B mouth of electrohydraulic control [16] communicates the A mouth sealing of electrohydraulic control [13] with the rodless cavity of tested large-scale servo hydraulic cylinder [18]; The rod chamber of tested large-scale servo hydraulic cylinder [18] communicates with low pressure pump; Tested large-scale servo hydraulic cylinder [18] is installed in the closed frame [17], and cushion block [3] is laid in the piston rod of tested large-scale servo hydraulic cylinder [18] upper end.
On the cylinder barrel of the rod chamber end of tested large-scale servo hydraulic cylinder [18], the center is provided with first sensor support [4] and second sensor stand [19] symmetrically, between first sensor support [4] and piston upper-end surface, be fixed with first displacement transducer [5], be fixed with second displacement transducer [1] between second sensor stand [19] and piston upper-end surface, second displacement transducer [1] is identical with first displacement transducer [5]; Second displacement transducer [1] is electrically connected with the A/D-2 passage of data collecting card [6], and first displacement transducer [5] is electrically connected with the A/D-3 passage of data collecting card [6]; Large-scale servo hydraulic cylinder [18] rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port respectively correspondence first pressure transducer [2] and second pressure transducer [9] are housed, first pressure transducer [2] is identical with second pressure transducer [9], first pressure transducer [2] is electrically connected with the A/D-1 passage of data collecting card [6], and second pressure transducer [9] is electrically connected with the A/D-4 passage of data collecting card [6] and an end of controller [8] respectively; One end of servoamplifier [10] is electrically connected with the control coil of electrohydraulic control [16], the other end of servoamplifier [10] is electrically connected with the D/A-1 passage of data collecting card [6] by controller [8], and data collecting card [6] and computer aided testing software [7] are installed in the computer.
2. large-scale servo hydraulic cylinder band according to claim 1 carries piston beat test system, it is characterized in that the main flow of described computer aided testing software [7] is:
S1-1, initializing variable, timing point n=0, target setting loading force F, control voltage u
0Incremental change Δ u with control voltage;
S1-2, by D/A-1 passage output control voltage u
N+1=u
n+ Δ u, wherein: u
nBe the control voltage of the n time output of D/A-1 passage, Δ u is the difference of the n+1 time output control voltage and the n time output control voltage, promptly controls the incremental change of voltage;
S1-3, the timing point n=n+1 that adds up;
S1-4, scan A/D-1 record the voltage U of bar cavity pressure corresponding conversion
A/D-1, calculate the rod chamber hydraulic action
Scan A/D-2, the voltage U of recording and analyses bar left side displacement corresponding conversion
A/D-2, calculate piston rod left side displacement
Scan A/D-3, the voltage U of recording and analyses bar right side displacement corresponding conversion
A/D-3, calculate piston rod right side displacement
Scan A/D-4, the voltage U of record rodless cavity pressure corresponding conversion
A/D-4, calculate the rodless cavity hydraulic action
In S1-4: U
A/D-1, U
A/D-2, U
A/D-3, U
A/D-4It is respectively the magnitude of voltage of data collecting card A/D-1, A/D-2, A/D-3, A/D-4 passage; K
1, K
2Be respectively the sensitivity of pressure transducer and displacement transducer, be power gain again; A
1, A
2Be respectively tested large-scale servo hydraulic cylinder rod chamber effective pressure area and tested large-scale servo hydraulic cylinder rodless cavity effective pressure area;
S1-5, judgement F
N2-F
N1Whether greater than target loading force F, if greater than then carrying out next step, if less than then returning S1-2;
S1-6, the proportionate relationship of pressing diameter of piston rod and piston diameter, with the absolute value of piston rod both sides displacement difference | S
N1-S
N2| be converted to piston beat amount S, then with the suffered loading force F of large-scale servo hydraulic cylinder
N2-F
N1Be abscissa, piston beat amount S is a y coordinate, draws large-scale servo hydraulic cylinder piston beat amount-loading force characteristic curve.
3. large-scale servo hydraulic cylinder band according to claim 1 carries piston beat test system, it is characterized in that the nominal load-bearing capacity of the maximum load capacity of described closed frame [17] greater than tested large-scale servo hydraulic cylinder [18].
4. large-scale servo hydraulic cylinder band according to claim 1 carries piston beat test system and test method thereof, it is characterized in that the loading force of described tested large-scale servo hydraulic cylinder [18] is less than or equal to its nominal load-bearing capacity.
5. the test method that large-scale servo hydraulic cylinder band as claimed in claim 1 carries piston beat test system is characterized in that testing procedure is:
S2-1, startup computer are opened computer aided testing software [7];
S2-2, starting electrical machinery [12], oil hydraulic pump [11] low load operation is progressively set up the pressure of electromagnetic relief valve [15], and hydraulic system is started working;
S2-3, parameter is set in computer aided testing software [7]: tested large-scale servo hydraulic cylinder [18] target loading force F, control voltage u
0, control voltage incremental change Δ u and timing point n;
S2-4, begin test, wait for that large-scale servo hydraulic cylinder [18] band carries the result of piston beat test;
S2-5, the deposit of tested large-scale servo hydraulic cylinder [18] piston beat amount-loading force characteristic curve is printed;
S2-6, disable motor [12], hydraulic system quits work;
S2-7, withdraw from computer aided testing software [7], shut down computer.
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| CN 201010515984 CN101979883B (en) | 2010-10-21 | 2010-10-21 | Loaded piston deflection test system and test method for large-sized servo hydraulic cylinder |
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| CN114278647A (en) * | 2021-12-23 | 2022-04-05 | 济南瑞原液压气动设备有限公司 | Loading test device of servo hydraulic cylinder |
| CN114603090A (en) * | 2022-03-11 | 2022-06-10 | 北京海卓博尔科技有限公司 | Crystallizer vibration driving device, control method and control system |
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