Design And Implementation Of Hardware-in-the-Loop Simulation Test Platform For Wheel Brake System

Wheel brake system that has a complex nonlinear and strongly unpredictable interference characteristic is an important component of aircraft takeoff and landing system. How to quickly and effectively verify the functionality and performance of wheel brake system is an urgent problem to be solved.In view of existing test methods for wheel brake system having some problems such as complex operation, high cost of test, low fide-lity and so on, the functionality and working principle of wheel brake system was analysed, and the development of hardware-in-the-loop simulation platform for wheel brake system was completed in the paper, combining virtual instrument and mathematical modeling with hardware-in-the-loop simulation technology.On the basis of that the background and research significance of the subject was introduced and the existing test methods were summarized and compared, the full digital simulation and ground inertial test device for wheel brake system have some inherent defect, and so the hardware-in-the-loop simulation technology was used as a test method for the wheel brake system. The simulation models such as airframe movement mechanics simulation model, landing gear simula-tion model and so on were modeled in MATLAB/Simulink and the anti-skid brake control unit, hydraulic systems and the other physical systems were used in the simulation loop. Lab VIEW and simulation interface toolkit were used to achieve real-time interaction between the physical system and the data of the models. On the simulation master computer, LabVIEW was used to achieve the development of monitoring interface of hardware-in-the-loop simulation test for aircraft takeoff and landing. Through the monitoring interface, the operating instructions were issued and test data was transmitted, displayed and stored. Taking the embedded real-time controller that is based on PXI bus and LabVIEW Real-Time operating system as the core and multifunction data acquisition card, fault injection unit, CAN communication interface card as peripheral modules, the real-time simulation computer realized the test data acquisition and communica-tion and calculated the simulation models.It is showed that the experiment platform is operated easily, stably, reliably and in good real-time. A vast amount of test data was provided for the development of certain aircraft wheel brake system. In addition, the development cost was decreased greatly and the development cycle was shortened.