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Research and Implementation of Fuzzy PID Control System Based on DSP for Linaer Motor

Author: ZouMin
Tutor: LiQing
School: Wuhan University of Technology
Course: Communication and Information System
Keywords: Permanent magnet synchronous linear motor PID control algorithm Fuzzy algorithm DSP
CLC: TM359.4
Type: Master's thesis
Year: 2010
Downloads: 510
Quote: 7
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Abstract


Linear motor because of its unique performance, widely used in various precision positioning applications. With the positioning accuracy and speed of response have become increasingly demanding, on the one hand, the processing of the linear motor increasingly stringent requirements; On the other hand, in the linear motor processing, basic performance have been identified to make the linear motor exhibit excellent The performance of the control system are increasingly high requirements. The conventional PID control as the first control strategy, is still widely used in industrial control. Fuzzy algorithm is one of the most recent decades gradually developed intelligent control strategy, with the support of the generation of the hardware chip fuzzy algorithm, fuzzy algorithm is also more and more used in various fields. However, the two algorithms is still inadequate. Conventional PID control is generally adapted to the control object model has been created, and the linear case, in fact, in many cases, the control object is not linear, and the mathematical model can not be established, and the working environment in which interference is more, if only using conventional PID control, can not control effect. Fuzzy algorithm is a nonlinear control, can be applied to nonlinear systems, and better dynamic performance and anti-jamming capability. However, fuzzy algorithm is no fixed method of analysis and modeling, fuzzy rules can only be obtained through the experience of experts and the actual control process, and this has led to the control accuracy is not very high, there is a static error, high speed and high precision control can not be applied in the linear motor. The design of the permanent magnet synchronous linear motor combined to address the problem of high-speed response requirements, this paper studied the PID control and fuzzy control based on a combination of the two algorithms build a fuzzy PID controller for permanent magnet synchronous linear motor speed closed-loop, and proposed improved fuzzy algorithm. In this paper, the linear motor control system design, including hardware platforms and software algorithms. Hardware DSP chip as the core of the control panel and power module IRAMS10UP60B, as the core driver board. The software algorithm consists of three closed-loop: displacement closed-loop and closed-loop speed and current closed-loop. Displacement closed-loop and closed-loop current conventional PID control algorithm, the speed closed-loop design fuzzy PID control algorithm. Linear motor control system simulation model created in Matlab software platform, simulation comparative analysis of speed closed-loop speed response curve, the simulation results show that fuzzy PID control PID control is more suitable for the system of two algorithms. Build good hardware platform on the linear motor control system experiment, found through experiments speed closed-loop fuzzy PID control has a small overshoot, anti-interference ability, good dynamic performance, to meet the motor high positioning accuracy and speed response Fast requirements.

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CLC: > Industrial Technology > Electrotechnical > Motor > A special motor > Linear motor
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