Research On Drive And Control System Of Vehicle Using Proportional Displacement Electromagnetic Actuator

Proportional displacement electromagnetic actuator, which is a key component of mechatronic system, is widely used in all kinds of vehicle electronic speed control system. With the rapid development of computer control technology, digital, intelligent control has become an inevitable trend. In recent years, a highly reliable CAN bus has been widely used in automotive electronic control system.In this paper, we first reviewed the development of electromagnetic actuator and its control technology from domestic and abroad, including the actuator body and related materials technology, the drive control technology, electric-gas servo and development and research of proportional control technology. Then, based on application requirements of subject background, we introduce the structure of magnetic actuator body and some theory involved. We design the driving and control system, which is valid in vehicle using proportion displacement electromagnetic actuator. The hardware control system is designed by using LPC11C12 ARM as core, which is with CAN bus control functions. This system is consisted of the input module, AD sampling module, PWM control module, the angular displacement of the feedback module, power module, CAN bus module and serial communication modules and other components. In order to improve accuracy of control system, we design adaptive fuzzy PID controller for the nonlinear and time-varying of inductive angular displacement of the actuator feedback signals. Based on the control algorithm and hardware design, we use a modular approach for the design of software.In the end, we carry out some preliminary experiments of proportional control, by using vehicle using proportion displacement electromagnetic actuator as the control object. The results of experiments show that the real-time control system of vehicle using proportion displacement electromagnetic actuator is correct. The system has high precision, good stability. It can achieve real-time closed-loop control to the actuator. Research achievements of this paper show some theoretical significance in the field of the electromagnetic actuator and its control system. Test prototype itself has broad market prospect.