[0029] The embodiments of the present invention will be described in further detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0030] Such as figure 1 As shown, the train brake hardware-in-the-loop semi-physical simulation test bed of this embodiment includes: a virtual part 1, a hardware part 3 of the test bed, and a data acquisition and signal conversion circuit 2; the air brake is used as the hardware part 3 of the test bed, The test bed can fully consider the structural complexity and strong nonlinearity of the air brake. The virtual train, virtual train operating environment and virtual electric braking force in the virtual part 1 of the test bed can provide the air-removing brake required for the train brake test. Test conditions other than the motivation hardware.
[0031] The virtual part 1 of the test bed is mounted on the computer terminal of the test bed. It includes a human-computer interaction interface 11, a virtual train module 12 for providing virtual trains and a virtual train operating environment, and a virtual electric brake for providing virtual electric braking force. Module 13; the human-computer interaction interface 11 is respectively connected with the virtual train module 12 and the virtual electric brake module 13, providing an information interaction interface between the tester and the virtual train module 12 and the virtual electric brake module 13, which is used to set the virtual train module 12 parameters, set the configuration of the virtual electric brake module 13, display and store test parameters and test results; the virtual train module 12 includes multi-section virtual vehicles, and the parameters of the virtual train module 12 include the number of virtual trains and the car body Quality, frame quality, wheel set quality, vehicle size, brake shoe friction coefficient, initial train braking speed, train running resistance, wheel-rail adhesion coefficient, etc.
[0032] The hardware part 3 of the test bench includes a driver controller 31 for generating train braking commands, an air brake 32 for providing air brake hardware required for the test, the number of air brakes 32 and the number of virtual trains Match; the driver controller 31 is used to generate a brake command signal and send the brake command signal to the air brake 32, the brake command signal includes normal braking, rapid braking, emergency braking, the driver The controller 31 sends the brake command signal to the man-machine interface 11 through the data acquisition and signal conversion circuit 2, and the man-machine interface 11 displays the brake command signal; the air brake 31 is a straight-through electro-pneumatic The brake is a microcomputer-controlled straight-through electro-pneumatic brake used on the actual train. The information exchange interface between the air brake 32 and the test bench is the same as that on the actual train. Each straight-through electro-pneumatic brake passes through The CAN bus 33 exchanges information.
[0033] The data acquisition and signal conversion circuit 2 is used to provide an information exchange interface between the virtual part 1 of the test bed and the hardware part 3 of the test bed. The data acquisition and signal conversion circuit 2 includes a data acquisition circuit and a signal conversion circuit. The data acquisition circuit and the The virtual part 1 of the test bench is connected, and the signal conversion circuit is connected between the data acquisition circuit and the air brake 32.
[0034] The virtual electric braking module 13 receives the electric braking request signal sent by the air brake 32 through the data acquisition and signal conversion circuit 2, and generates a virtual electric braking force according to the electric braking request signal to act on the virtual train. The electric brake module 13 sends the electric brake feedback signal to the air brake 32 through the data acquisition and signal conversion circuit 2, and the air brake 32 generates a virtual air brake force according to the electric brake feedback signal. The motive 32 applies the air braking force to the virtual train through the data acquisition and signal conversion circuit 2. The virtual train module 11 sends the axle speed and load of each virtual vehicle of the virtual train to the corresponding air brake 32 through the data acquisition and signal conversion circuit 2 as the calculation of the anti-skid and braking force of the air brake 32 in accordance with.
[0035] The present invention also provides a test method for applying the train brake hardware in the loop semi-physical simulation test rig for train brake hardware replacement and semi-physical simulation test. The steps of the test method include:
[0036] S1. Before the test starts, set the parameters of the virtual train module 12 through the human-machine interface 11, including the number of virtual trains, car body quality, frame quality, wheelset quality, vehicle size, brake shoe friction coefficient, and train braking Initial speed, train running resistance, wheel-rail adhesion coefficient, etc., set the configuration of the virtual electric brake module 13 through the human-machine interface;
[0037] S2. The driver controller 31 generates a braking instruction signal, the braking instruction signal includes normal braking, rapid braking, and emergency braking. The braking instruction signal is sent to the air brake 32 on the one hand, and the other On the one hand, it is collected by the data acquisition and signal conversion circuit 2 and converted and displayed by the human-computer interaction interface 11;
[0038] S3. The air brake 32 decodes the brake command signal after receiving the brake command signal, and sends the electric brake request signal in analog form to the virtual electric brake module 13 through the data acquisition and signal conversion circuit 2 After receiving the electric braking request signal, the virtual electric braking module 13 generates a corresponding virtual electric braking force according to the electric braking request signal to act on the virtual train, and the virtual electric braking module 13 converts the virtual electric braking The magnitude of the braking force is sent to the air brake 32 in the form of an analog quantity through the electric braking force feedback signal through the data acquisition and signal conversion circuit 2;
[0039] S4. The air brake 32 determines the amount of air braking force that needs to be supplemented after receiving the electric brake feedback signal, and then controls its internal pneumatic valve to adjust the air pressure in its brake cylinder to generate the required air brake Power, the brake cylinder pressure (which can be converted into brake shoe pressure) is collected by the pressure sensor in the air brake and then sent to the virtual train module 12 in analog form through the data acquisition and signal conversion circuit 2 and acted on the virtual train on;
[0040] S5. After the virtual air braking force and virtual electric braking force are applied to the virtual train, it produces a virtual braking process. During the braking process, the axle speed signal of each vehicle of the virtual train is in the form of pulses. It is sent to the air brake 32 corresponding to the vehicle through the data acquisition and signal conversion circuit 2, and its load signal is sent to the air brake 32 corresponding to the vehicle through the data acquisition and signal conversion circuit 2 in analog form Calculate the anti-skid and braking force of the air brake 32 based on the shaft speed signal and load signal.
[0041] The train brake hardware-in-the-loop semi-physical simulation test bed of the present invention uses an air brake as the hardware-in-the-loop, and uses virtual train modules and virtual electric brake modules to provide virtual trains, virtual train operating environments and virtual electric braking forces, and adopts The data acquisition and signal conversion circuit provides the information exchange interface between the virtual part of the test bed and the hardware part of the test bed, which realizes the hardware-in-the-loop semi-physical simulation test of train braking. It can be set and changed according to the specific test requirements and the braking test that needs to be studied Parameters (such as brake shoe friction coefficient, train running resistance, wheel-rail adhesion, etc.), it can also test the performance of the air brake under various control parameters, especially the worst working conditions. Due to the use of hardware In the ring mode, the obtained brake performance parameters of the train are relatively close to the actual vehicle test, but compared with the actual vehicle test, it is more convenient and quick, which can save a lot of personnel, expenses and time. Therefore, the present invention effectively combines the two braking research methods of relying solely on simulation and completely relying on test, can fully consider the complexity and strong nonlinearity of the brake, the test result is accurate, and the test cost is greatly reduced.
[0042] The embodiments of the present invention are given for the sake of example and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and changes are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention so as to design various embodiments with various modifications suitable for specific purposes.
