Research Of ABS In Fuel Cell Electrical Bus

Automobile Anti-lock Braking System is an active safety device. It can raise the rate ofthe safety performance and reduce accident. Now ABS becomes a very necessary deviceequipped in many vehicles. In recent years some interralated legislation has beencompulsively drawn up to call for the setting of ABS on bus and wangon. In China, theresearch of ABS is still behind that of other country, and the core technology inside ABSincluding control algorithm and the realization of hardware and software depends on foreignproduct. What the paper focuses on is the basis of development of the fuel-cell electric busABS system based on embedded technology. Detail and main conclusion are showed asfollows:Studied 3 kinds of more practical ABS control methods from the physically design andimplement of controller, namely traditional control of the logic threshold, PID control andfuzzy control. Discussed them and come up with the right way, then adopted MATLAB/SIMULINK software to simulate these 3 kinds of control methods, and evaluate the imitatingresult.According to build ABS based on embeded system, provides an applied environment forcontrol methods, furthermore studied the constitute and structure of ABS system on electricbus, according to the real condition, designed the circuit of each unit; and analyzed thetransplantation process of embeded Linux deeply, including the transplantation of BootLoader, kernel of Linux, file system, the design of driver.Aiming at strong non-line of Anti-lock Braking System (ABS), according to the resultsof above annlysis about 3 kinds of control methods, By the whole design of ABS, mainlyincluding data collection module, control module, execution module, and the simulation withdata in practical situation, received a relative ideal result at last.Developed ABS system of the fuel cell electric bus according to ARM9 microprocessors.Carried on the design of ABS system, described the process that carrys out the design ofhardware circuit and software logic in the unit. Through feasible test, verified the usefulnessand rationality of system, provide a beneficial basis for the research that the active safety control of electric bus will be integrated in future, and accumulate the technology material forbuilding up the whole integrated control system based on embedded system after this projectin the future.