|
With the popularity of cars in China , more and more demands on the car 's safety performance . Existing car Anti-lock Braking System-ABS ( anti-lock braking system) . ABS system , a brake is an important component . The brakes are the most important components to guarantee the safe driving of the car . The life of the brake directly determines the performance of the ABS . ABS brakes fatigue test rig is a physical simulation test equipment , and its function is to reproduce under laboratory conditions , ABS brakes during braking by the load , the traditional fatigue test experience becomes under laboratory conditions predictive test, performance test data for the development and application of new type of brake . This article was detailed , in-depth study of the ABS brakes fatigue test rig valve control pressure system ; dynamic servo valve , the static characteristics derive the transfer function of the driving force control system analysis and simulation analysis using Matlab . This article describes the principles and characteristics of the traditional PID controller , the algorithm and its advantages exist , full use of the advantages of the software servo the dynamic PID correction system , to improve the speed and control of the system performance . Fatigue test stand of ABS brake pressure control system electronic control unit (ECU) using SCM signal is generated by the software , to improve the reliability of the system ; servo valve drive with single-chip driver , software , hardware design simple . Assembled and tested in the experimental section , the ABS test bench control system part , on the entire test , the pressure curve error is very small , and the simulation results , which we pressure the valve control system to meet the design requirements .
|