Study on the Control System of Electric Vehicle Anti-rollover Based on DSP

摘要

According to the actual need of vehicle anti-rollover, based on the current technology of measuring speed, weighing and measuring turn angle, an anti-rollover control system with differential braking and turn angle limit function for electrical vehicle was researched. The system uses data signal processor (DSP) as the core controller, and includes the speed measuring circuit, the weighing circuit, the steering angle measuring circuit and the steering wheel control circuit. The speed measuring circuit using the orthogonal pulse photoelectric encoder and DSP can realize the acquisition and calculation of speed. The weighing circuit with capacitance sensor can convert the load of vehicle axle to the voltage signal. A/D conversion is completed by DSP, and the vehicle load is calculated with V-M mathematic model. The turn angle measuring circuit is composed of the photoelectric angle sensor, the filter and DSP' counter. The control program of the system was also designed.