| The steering system has experienced many types such as mechanical steeringhydraulic Power steering and electric Power steering which is Provides Power directly byelectric motor.The power is controlled by ECU.which has many advantages suchenvironmental protection, the low power as the adjusted power the good road feels, theconsumes and the convenience maintaining and so on.It has the advantage which thetraditional hydraulic power steering is impossible.So it is both a topic hotly talked incurrent vehicle technology and one of the top techniques.The subject of the development of regenerative braking controller hardware toFreescale the MC9S12DG128as the control center, including data acquisition module,communication modules, control module. communication modules, including serial portand CAN interface; communication circuit; control module including DC motor circuitand exception handles circuit; Data acquisition module includes wheel speed sensorsignal acquisition circuit, torque speed sensor signal acquisition circuit, DC motor signalcircuit. And the hardware is verified through the testing.Lower computer program embedded C language, including system initializationmodule, data acquisition modules, communications modules, control modules. PCprogram written by VB6.0, include system initialization interface, data acquisitioninterface. Calibration interface will need to calibrate the parameters of transmission tothe next bit machine can also view the lower machine operating parameters, dataacquisition interface with the data, the curve of real-time rendering, and data storage. Thecontroller software which divided into lower computer-controller and PC-PC machinetwo parts, connect o communications and data transmission through the USB-CAN card.The experiment proves that the testing system is feasible and effective Programmedand debugged the corresponding control Procedures. But during the research there aresome problems were found needed to be improved and consummated further. |
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