A brake actuator performance test bench

Abstract

The utility model relates to a brake actuator performance test board belongs to the aerospace technical field, solved the prior art in prior brake actuator performance test board cannot realize the closed -loop control of wheel speed and actuator output force, reduce the problem of the accuracy of test board simulation. The utility model discloses force unit, speed simulation motor and signal collector, force unit is connected with the brake actuator of being measured, and force unit is used for measuring the measured brake actuator exerted loading force, signal collector is connected with speed simulation motor, and signal collector is used for detecting and exporting the real -time speed signal of speed simulation motor, the loading force signal of force unit collection and the speed signal that signal collector collected export to control unit, the measured brake actuator receives the action signal of control unit, and speed simulation motor receives the speed signal of control unit output. The utility model can realize the closed -loop control of speed and actuator output force, improve the accuracy of test board simulation.

Description

Technical Field

[0001] This utility model relates to the field of aerospace technology, and in particular to a brake actuator performance test bench. Background Technology

[0002] Traditional hydraulic brake actuator performance test benches typically use hydraulic power sources, which cannot adapt to the characteristics of electric motor drives and lack the ability to test electrical signal coupling. Dedicated test equipment for aircraft all-electric brake actuators is lacking; existing tests usually use inertial test benches, integrating the wheels and braking system together for testing, resulting in high testing costs and long setup and commissioning cycles. Existing actuator test benches cannot measure actuator output force and cannot achieve closed-loop control of wheel speed and actuator output force, reducing the accuracy of the test bench simulation. Utility Model Content

[0003] Based on the above analysis, the present invention aims to provide a brake actuator performance test bench to solve the problem that existing brake actuator performance test benches cannot achieve closed-loop control of wheel speed and actuator output force, thus reducing the accuracy of the test bench simulation.

[0004] The objective of this utility model is mainly achieved through the following technical solutions:

[0005] A brake actuator performance test bench includes a force measuring unit, a speed simulation motor, and a signal acquisition unit;

[0006] The force measuring unit is connected to the brake actuator under test, and the force measuring unit is used to measure the loading force applied by the brake actuator under test; the signal acquisition unit is connected to the speed simulation motor, and the signal acquisition unit is used to detect and output the real-time speed signal of the speed simulation motor;

[0007] The force measurement unit collects the applied force signal and the speed signal collected by the signal acquisition device, and outputs them to the control unit; the brake actuator under test receives the action signal from the control unit, and the speed simulation motor receives the speed signal output by the control unit.

[0008] Furthermore, the tested brake actuator consists of two parts.

[0009] Furthermore, the two brake actuators under test are arranged symmetrically.

[0010] Furthermore, the force measuring unit includes a force sensor and a sensor indenter;

[0011] The central axis of the brake actuator under test is collinear with the central axis of the force sensor and the sensor head; when the applied force is not applied, there is a gap between the brake actuator under test and the sensor head; when the applied force is applied, the extended end of the brake actuator under test is in contact with the sensor head.

[0012] Furthermore, the gap between the brake actuator under test and the sensor pressure head is 2-14mm.

[0013] Furthermore, it also includes fixed units;

[0014] The fixing unit includes a frame and a connector; the brake actuator under test and the force measuring unit are fixed to the frame through the connector.

[0015] Furthermore, the connector includes a positioning part, a bearing part, and a connecting part, wherein the positioning part is used to fix the connector to the frame;

[0016] The connecting parts are disposed at both ends of the bearing part, and the connecting parts are used to connect the brake actuator under test and the force measuring unit.

[0017] Furthermore, parallel first platform structures are provided on the circumferential edges of opposite sides of the connecting part; the brake actuator under test has an actuator mounting plate, and the force measuring unit further includes a force sensor mounting plate;

[0018] The actuator mounting plate is provided with a first mounting through hole, and a second platform structure is provided inside the first mounting through hole, the first platform structure being fitted with the second platform structure; and / or

[0019] The sensor mounting plate is provided with a second mounting through hole, and the inner peripheral wall of the second mounting through hole is provided with a third platform structure that is radially opposite and parallel to each other; the third platform structure is fitted with the first platform structure.

[0020] Furthermore, the connector also includes an anti-loosening part; the anti-loosening part is disposed on one side of the connector to prevent the tested brake actuator and the force measuring unit from becoming loose from the connector.

[0021] Furthermore, it also includes locking washers and round nuts;

[0022] The anti-loosening part has an external thread, and a first stop groove is provided on the external thread;

[0023] The round nut is screwed onto the external thread, and the inner stop tooth of the stop washer engages with the first stop groove; the round nut has a second stop groove, and the outer stop tooth of the stop washer engages with the second stop groove of the round nut.

[0024] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0025] (1) In this utility model, the force measuring unit is connected to the brake actuator under test to measure the loading force applied by the brake actuator under test. The signal acquisition unit collects the speed signal of the speed simulation motor. The control unit calculates a new speed signal based on the loading force signal collected by the force measuring unit and the speed signal collected by the signal acquisition unit, and controls the operation of the speed simulation motor, thereby forming a closed-loop control of loading force - force measurement - motor rotation - speed acquisition - control unit calculates new speed - motor rotates according to the new speed - speed acquisition and force sensor, realizing dynamic and accurate simulation of the actuator output force.

[0026] (2) The brake actuator performance test bench provided by this utility model uses the brake actuator as the test piece, instead of integrating the wheel and brake device together for testing, which reduces the testing cost and simplifies the clamping method.

[0027] (3) Multiple brake actuators are measured according to the actual needs of the aircraft. The embodiments provided in this application can measure two brake actuators to compare the test data of the two brake actuators and verify each other to avoid excessive error. In addition, the two brake actuators are arranged symmetrically, and the force on the fixed unit is balanced.

[0028] (4) The force sensor is used to measure the loading force of the brake actuator. The central axes of the two are collinear, making the measurement more accurate. Before loading, the gap between the brake actuator and the sensor head can be adjusted between 2-14mm by adjusting the sensor head. This is used to simulate the wear of the aircraft brake disc to verify the automatic gap adjustment function of the brake actuator. This is the same as the actual braking requirements of the aircraft, so as to improve the measurement accuracy.

[0029] (5) The brake actuator and force measuring unit under test are fixed to the frame by a connector. The loading force of the loading unit is borne by the connector to prevent it from being transmitted to the frame and damaging it. The connector includes a positioning part, a bearing part, a connecting part, and an anti-loosening part. The positioning part is used to fix the connector to the frame; the bearing part is used to bear the loading force; the connecting part is used to connect the brake actuator and the force measuring unit. The first platform structure of the connecting part is fitted with the second platform structure of the actuator mounting plate and / or the third platform structure of the force measuring unit to connect them; the anti-loosening part is used to prevent the actuator mounting plate and / or the sensor mounting plate from loosening from the connecting part. The anti-loosening part is secured by the inner locking teeth of the locking washer engaging with the locking groove of the outer thread of the anti-loosening part, and the outer locking teeth of the locking washer engaging with the locking groove of the round nut for double anti-loosening.

[0030] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0031] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0032] Figure 1 This is a schematic diagram of the brake actuator performance test bench according to a specific embodiment;

[0033] Figure 2 This is a schematic diagram of the isometric structure of a test bench without a control cabinet, according to a specific embodiment.

[0034] Figure 3 This is a top view of a test bench without a control cabinet, according to a specific embodiment.

[0035] Figure 4 This is a schematic diagram of the connector structure in a specific embodiment;

[0036] Figure 5 This is a schematic diagram of the actuator mounting plate in a specific embodiment;

[0037] Figure 6 This is a schematic diagram of the sensor mounting plate in a specific embodiment;

[0038] Figure 7 This is a schematic diagram of the sensor pressure head in a specific embodiment;

[0039] Figure 8 This is a schematic diagram of the structure of the motor mounting bracket in a specific embodiment;

[0040] Figure label:

[0041] 1-Fixing unit; 11-Frame; 12-Connector; 121-Positioning part; 122-Bearing part; 123-Connecting part; 1231-First platform structure; 124-Anti-loosening part; 1241-First stop groove; 2-Brake actuator; 21-Actuator mounting plate; 211-Arc-shaped notch; 212-First mounting through hole; 2121-Second platform structure; 3-Force measuring unit; 31-Force sensor; 32-Sensor pressure head; 33-Sensor mounting plate; 331-Second mounting through hole; 3311-Third platform structure; 4-Speed ​​simulation motor; 41-Motor mounting base; 5-Encoder; 6-Control cabinet. Detailed Implementation

[0042] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0043] A specific embodiment of this utility model is as follows: Figure 1 , Figure 2 , Figure 3 As shown, a brake actuator performance test bench is disclosed, including a force measuring unit 3, a speed simulation motor 4, and a signal acquisition unit.

[0044] Force measuring unit 3 is connected to the brake actuator 2 under test, and is used to measure the loading force applied by the brake actuator 2 under test. Signal acquisition unit is connected to speed simulation motor 4, and is used to detect and output the real-time speed signal of speed simulation motor 4.

[0045] The force measurement unit 3 collects the applied force signal and the speed signal collected by the signal acquisition device and outputs them to the control unit; the brake actuator under test 2 receives the action signal from the control unit, and the speed simulation motor 4 receives the speed signal output by the control unit.

[0046] In this embodiment, the force measuring unit 3 is connected to the brake actuator 2 under test to measure the loading force applied by the brake actuator 2 under test. The signal acquisition unit collects the speed signal of the speed simulation motor. The control unit calculates a new speed signal based on the loading force signal collected by the force measuring unit and the speed signal collected by the signal acquisition unit, and controls the operation of the speed simulation motor 4. This forms a closed-loop control of loading force - force measurement - motor rotation - speed acquisition - control unit calculates new speed - motor rotates according to the new speed - speed acquisition and force sensor 31, realizing dynamic and accurate simulation of the actuator output force.

[0047] The brake actuator performance test bench provided in this embodiment uses the brake actuator 2 as the test piece, instead of integrating the wheel and brake device together for testing, which reduces testing costs and simplifies the clamping method.

[0048] Specifically, it also includes fixed unit 1. For example... Figure 2 and Figure 3 As shown, the fixing unit 1 includes a frame 11 and a connector 12. In order to prevent the load force from being transmitted to the frame 11 and damaging the frame 11, the brake actuator 2 under test and the force measuring unit 3 are fixed to the frame 11 through the connector 12, and the load force of the brake actuator 2 under test is borne by the connector 12.

[0049] like Figure 4 As shown, the connector 12 includes a positioning part 121, a bearing part 122, and a connecting part 123.

[0050] The positioning part 121 is used to fix the connector 12 to the frame 11. By way of example, the positioning part 121 is provided with a flat surface, and the connector 12 is detachably fixed to the frame 11 by means of the flat surface.

[0051] The bearing part 122 is disposed between the two connecting parts 123 and is used to bear the load.

[0052] The connecting part 123 has parallel first platform structures 1231 on the circumferential edges on both sides for connecting the brake actuator 2 under test and the force measuring unit 3.

[0053] The connector 12 also includes an anti-loosening part 124. The anti-loosening part 124 is provided on one side of the connector 123 to prevent the brake actuator 2 under test, the actuator mounting plate 21, and the force measuring unit 3 from becoming loose from the connector 123.

[0054] Exemplarily, it also includes a locking washer and a round nut. The anti-loosening part 124 has an external thread, on which a first locking groove 1241 is provided. The round nut is screwed into the external thread, and the inner locking teeth of the locking washer engage with the first locking groove 1241 of the external thread. The round nut has a second locking groove, and the outer locking teeth of the locking washer engage with the second locking groove of the round nut, thereby achieving double anti-loosening and improving test safety.

[0055] Brake actuator 2 can be configured as one or more depending on the specific needs of the aircraft. This embodiment is a simulation experiment of brake actuator 2 for a six-ton ​​cargo aircraft, with two brake actuators 2 configured. The use of two brake actuators 2 allows for comparison of measurement data, and based on the actual braking requirements of the aircraft, the data deviation between the two brake actuators 2 should not exceed 10%.

[0056] Preferably, to minimize the error between the two brake actuators 2, the two brake actuators 2 are symmetrically distributed. When it is necessary to measure one brake actuator 2, one of the brake actuators 2 can be shut down through the control unit.

[0057] The brake actuator 2 has a piston at its extended end, and the extension length is adjusted by the control unit.

[0058] The brake actuator 2 under test has an actuator mounting plate 21. The brake actuator 2 is connected to the connector 12 via the actuator mounting plate 21. For example, as shown... Figure 5 As shown, the actuator mounting plate 21 has a first mounting through hole 212 for mounting connection part 123. The inner peripheral wall of the first mounting through hole 212 is provided with a second platform structure 2121 that is radially opposite and parallel to each other. The second platform structure 2121 fits into the first platform structure 1231 to connect the actuator mounting plate 21 and the connector 12 and fix their relative positions.

[0059] The actuator mounting plate 21 has arc-shaped notches 211 on both sides, which conform to the outer surface of the brake actuator 2. For example, the actuator mounting plate 21 around the arc-shaped notches 211 has threaded holes, and the brake actuator 2 is fixed in the arc-shaped notches 211 by bolts.

[0060] The force measuring unit 3 includes a force sensor 31 and a sensor pressure head 32 connected to the force sensor 31.

[0061] To ensure accurate measurement by the force sensor 31, the central axis of the brake actuator 2 is collinear with the central axes of the force sensor 31 and the sensor head 32. In the unloaded state, there is a gap between the brake actuator 2 and the sensor head 32; in the loaded state, the protruding end of the brake actuator 2 is in contact with the sensor head 32.

[0062] Preferably, when not loaded, the gap between the brake actuator 2 and the sensor head 32 can be adjusted between 2-14mm by adjusting the position of the sensor head 32, in order to simulate the wear of the aircraft brake disc and verify the automatic gap adjustment function of the brake actuator 2.

[0063] The force measuring unit 3 also includes a sensor mounting plate 33, such as Figure 6 As shown, the sensor mounting plate 33 has a second mounting through hole 331 for mounting connection part 123. The inner peripheral wall of the second mounting through hole 331 is provided with a third platform structure 3311 that is radially opposite and parallel to each other. The third platform structure 3311 fits into the first platform structure 1231 to connect the sensor mounting plate 33 and the connector 12 and fix their relative positions.

[0064] Furthermore, the force sensor 31 and the sensor pressure head 32 are respectively disposed on both sides of the sensor mounting plate 33. The force sensor 31 is detachably connected to the sensor mounting plate 33. Figure 7 As shown, the sensor pressure head 32 includes a flat head and a screw portion. The sensor mounting plate 33 has pressure head mounting holes on both sides of the second mounting through hole 331. The screw portion passes through the pressure head mounting hole and is screwed into the internal threaded hole of the force sensor 31. The central axis of the sensor pressure head 32 coincides with the central axis of the force sensor 31. Furthermore, the gap between the flat head and the brake actuator 2 can be adjusted by the screwing length of the screw portion and the intermediate threaded hole of the force sensor 31.

[0065] The speed simulation motor 4 and the signal acquisition device are mounted at one end of the frame 11. Exemplarily, in this embodiment, the signal acquisition device is an encoder 5, which acquires the speed of the speed simulation motor 4 in real time. Figure 3 and 8As shown, a motor mounting base 41 is connected to the frame 11. The speed simulation motor 4 and the encoder 5 are respectively set at both ends of the motor mounting base 41. The output shaft of the speed simulation motor 4 and the input shaft of the encoder 5 are connected by a coupling to ensure the synchronization and accurate transmission of the speed signal.

[0066] The control unit is located in control cabinet 6. The brake actuator under test 2, force measuring unit 3, speed simulation motor 4, and signal acquisition unit are electrically connected to the control unit. The applied force signal collected by force measuring unit 3 and the speed signal collected by signal acquisition unit are output to the control unit. The brake actuator under test 2 receives the action signal from the control unit, and the speed simulation motor 4 receives the speed signal output by the control unit. The control unit calculates a new speed based on the applied force signal collected by force measuring unit 3 and the speed signal collected by signal acquisition unit, and controls the operation of speed simulation motor 4.

[0067] The usage method of this embodiment is as follows:

[0068] During testing, the control unit issues a command to drive the extended end of the brake actuator 2 under test to extend. The extended end of the brake actuator 2 contacts the sensor pressure head 32, and the output force of the brake actuator 2 under test is transmitted to the force sensor 31 through the sensor pressure head 32 for real-time measurement. At the same time, the control unit receives the real-time speed signal from the encoder 5, and calculates the current simulated speed according to the preset braking condition model (such as normal landing and skidding, wet track, etc.) and force feedback signal. It then controls the speed to simulate the rotation of the motor 4, thus forming a closed-loop test system of applying force - measuring force - motor rotation - acquiring speed - control unit calculating new speed - motor rotating according to the new speed - acquiring speed.

[0069] This embodiment is a fully electric drive system, eliminating the inherent defects of hydraulic systems. The test bench parameters are easy to adjust, allowing for rapid and repeated experiments with different parameters. This embodiment uses a speed simulation motor 4 and encoder 5 to accurately simulate the aircraft's landing and taxiing speeds. Force sensor 31 verifies the consistency between the output performance and design performance of the fully electric brake actuator 2, achieving synchronous acquisition and processing of actuator output force, speed, and other parameters. The test bench extensively uses standard and finished components, resulting in low equipment cost, easy installation, and advantages such as compact structure, high testing accuracy, and fast dynamic response. It can meet the research and testing needs of modern aircraft fully electric brake actuators 2 and brake control programs.

[0070] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model.

Claims

1. A brake actuator performance testing bench, characterized in that, It includes a force measuring unit (3), a speed simulation motor (4), and a signal acquisition unit; The force measuring unit (3) is connected to the brake actuator (2) under test, and the force measuring unit (3) is used to measure the loading force applied by the brake actuator (2) under test; the signal acquisition unit is connected to the speed simulation motor (4), and the signal acquisition unit is used to detect the real-time speed signal of the speed simulation motor (4); The force measurement unit (3) collects the loading force signal and the speed signal collected by the signal acquisition device and outputs them to the control unit; the brake actuator under test (2) receives the action signal from the control unit and the speed simulation motor (4) receives the speed signal output by the control unit.

2. The brake actuator performance test bench according to claim 1, characterized in that, There are two brake actuators (2) under test.

3. The brake actuator performance test bench according to claim 2, characterized in that, The two brake actuators (2) under test are arranged symmetrically.

4. The brake actuator performance test bench according to claim 1, characterized in that, The force measuring unit (3) includes a force sensor (31) and a sensor pressure head (32); The central axis of the brake actuator (2) under test is collinear with the central axis of the force sensor (31) and the sensor head (32); when the load is not applied, there is a gap between the brake actuator (2) under test and the sensor head (32); when the load is applied, the extended end of the brake actuator (2) under test is in contact with the sensor head (32).

5. The brake actuator performance test bench according to claim 4, characterized in that, The gap between the brake actuator (2) under test and the sensor head (32) is 2-14 mm.

6. The brake actuator performance test bench according to claim 1, characterized in that, It also includes a fixed unit (1); The fixing unit (1) includes a frame (11) and a connector (12); the brake actuator (2) under test and the force measuring unit (3) are fixed to the frame (11) through the connector (12).

7. The brake actuator performance test bench according to claim 6, characterized in that, The connector (12) includes a positioning part (121), a bearing part (122), and a connecting part (123). The positioning part (121) is used to fix the connector (12) to the frame (11); the bearing part (122) is used to bear the loading force. The connecting part (123) is disposed at both ends of the bearing part (122), and the connecting part (123) is used to connect the brake actuator (2) under test and the force measuring unit (3).

8. The brake actuator performance test bench according to claim 7, characterized in that, The connecting part (123) has parallel first platform structures (1231) on the circumferential edges on both sides; the brake actuator (2) under test has an actuator mounting plate (21); the force measuring unit (3) also includes a sensor mounting plate (33); The actuator mounting plate (21) is provided with a first mounting through hole (212), and a second platform structure (2121) is provided inside the first mounting through hole (212). The first platform structure (1231) is in contact with the second platform structure (2121); and / or The sensor mounting plate (33) is provided with a second mounting through hole (331), and the inner peripheral wall of the second mounting through hole (331) is provided with a third platform structure (3311) that is radially opposite and parallel to each other; the third platform structure (3311) is in contact with the first platform structure (1231).

9. The brake actuator performance test bench according to claim 7, characterized in that, The connector (12) further includes an anti-loosening part (124); the anti-loosening part (124) is disposed on one side of the connector (123), and the anti-loosening part (124) is used to prevent the brake actuator (2) under test and the force measuring unit (3) from becoming loose from the connector (123).

10. The brake actuator performance test bench according to claim 9, characterized in that, It also includes a locking washer and a round nut; The anti-loosening part (124) has an external thread, and a first stop groove (1241) is provided on the external thread; The round nut is screwed into the external thread, and the inner stop tooth of the stop washer engages with the first stop groove (1241); the round nut has a second stop groove, and the outer stop tooth of the stop washer engages with the second stop groove of the round nut.

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