Research And Implementation Of An Adaptive Rectification Controller Based On DSP

Plastics, paper, cloth, leather is an important semi-manufactured and raw materials in industrial production. According to the winding process, this production often produces the strip lateral offset because of the mechanical vibration and failure, and seriously affects the quality of products. Nowadays, conventional PID is a popular control method of strip rectification controllers both inland and abroad. However, With the strip quality and driving torque, rectification system is a nonlinear control system. these control methods are difficult to the need of high-precision in the correction process. Therefore, it is very important to research correction control in the scientific value and economic significance.Firstly, this paper proposes the status of corrective technology development at inland and abroad and the composition and principle of the correction system. Then the paper designs a mathematical model about control object correction, analyzes the control theory of conventional PID and fuzzy control. Combining these advantages, the paper designs a modified adaptive fuzzy PID controller. The fuzzy controller can automatically modify the PID control parameters based on the control error signal and overcome the disadvantage of traditional PID ineffective due to parameters fix. To verify the effect of the control of the controller, this controller improves the robustness of the control system and respectively uses three kinds of method such as self-adaptive fuzzy control method based on the proportionality factors, fuzzy PID of self-adaptation, conventional PID to use the same simulation model to control. The results shows that the scaling factor fuzzy self-tuning PID controller has more short of time, smaller of percent overshoot, more stable than the other controllers.Finally, the paper designs and implements the hardware circuits and software applications based on the above control strategy. The hardware circuit includes:TMS320F28335 DSP interface peripheral circuit, interactive circuit, actuator circuits, power module circuit, position limitation protection circuits. Software applications include:rectification control module, LCD display and refresh module, PWM generator module, A/D data conversion module. Experimental results show that the proposed paper and designed the adaptive rectification controller reaches the target, the correction error is ?1.0mm.The Adaptive correction controllers has a strong practicability, a high precision correction and faster, can be the needs of the field correction. The case study shows that the prediction result is of high accuracy.