Rig Development And Simulation Research Of Embedded Brake System Driven By Driving Simulator

V-Cycle is the basis of electronic control system development.Researchers can verify the control algorithm and tune parameters via open loop virtual field test.However,test results are deeply affected by drivers' factors and test environment,which will influence the development cycle.Taking drivers' factors to early stages of electronic control system development and performing equivalent virtual field tests will reduce research and development cycle and cost.The thesis,aiming at electronic control system of brake system,attempts to introduce driving simulator to early stage of the development.In this paper,the research route contains three aspects.First,build an embedded brake system test rig,which providing a hardware platform for development and verification of the control system.Second,study the effect of concurrent simulation to integration platform's function and performance,which improving its function and performance.Third,enrich the environment of virtual field test,which covers most of the test conditions and close to the real field tests.Following parts are detailed contents.To begin with,build an embedded brake system driven by driving simulator.There are cases that using driving simulator assisting to develop electronic control system domestic and overseas,however the application of load simulation and parameters calibration are relatively backward.According to mechanical and electrical design,sensors and load are introduced to the test rig,which enables the test rig to perform all brake system hardware simulation,partly brake system hardware and model simulation and all brake system model simulation.The test rig can be used to develop control algorithm and parameters calibration in its early stage.Secondly,study the concurrent simulation of the integrated platform between brake system test rig and driving simulator.Concurrent simulation cannot always achieve automatic simulation.Data communication,timing synchronization,and automatic simulation issues have been solved in this paper according to high speed data communication,external timer interrupt and platform application program interfaces,which improve the performance of the platform.Thirdly,enrich virtual test environment.The driving simulator used in this paper only has a single friction coefficient of road surface at present,which does not meet the test standard of brake system controller.Virtual test scenarios,friction coefficient of road surface and road roughness model have been built according to brake system test standard.The virtual test scenarios covers all test conditions,and increase low friction road surface.Besides,road roughness model simulates high frequency stimulate of real road,and two-dimensional inverse Fourier transform method is used to generate three dimension road surface model.Finally,experimental verification has been performed on the integrated platform.Parameters calibration of Anti-lock Braking System control algorithm and functional verification of Anti-lock Braking System control unit have been performed by the test rig showing that test rig driven by driving simulator can be used to verify and calibrate electronic controller in its early development stage.Brake system test rig integrated into the driving simulator and the concurrent simulation have been studied,besides virtual test environment is much richer.A testing and verification platform for brake system control unit has been setup,and parameters calibration of control algorithm and verification of the control unit have been achieved.