Dsp-based Four-wheel Steering Controller Applied Research

As one of the main methods of improving the controlling stability, the technology of Four-Wheel-Steering (FWS) has directly affected the veracity and precision of steering. Aiming at the open questions of FWS Controller, the thesis selects LCD with powerful functions as display of FWS Controller. By the hardware and software design, the information shown on the display includes malfunction, work module , outer corner of steering wheel and so on . Basing on CAN bus, data communication between FWS Controller and main Controller is accomplished, CAN bus technique has applications in distributed control system of construction machinery, main Controller can scout and control other controllers in long distance by the hardware and software design. Ray and electricity isolation circuit is adopted in hardware and fixed time test is adopted in software, communication can be done credibility. Malfunction self-test module and data memory expansion module are designed. The paper accomplishes the hardware design utilizing DSP as core unit and software design utilizing CC2000 software. At last the function and communication stability of controller are inspected through indoor test. Through the applications studies of FWS Controller based on DSP, lay the foundation of distributed control system of construction machinery study.