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Graduation Design (Thesis)

Design and Simulation of

Double Loop DC Motor Control System

By Wu Jie

Supervised by

Associate Prof. Zhang zhenyan

Department of Automation Engineering

Nanjing Institute of Technology

May, 2014

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ABSTRACT

In order to raise application efficiency of the motion control system in actual project ,this article discussed the engineering design methods of the speed-governing system of DC motor. The mathematical modeling and system simulation of direct current governor system are researched by means of MATLAB platform . The simulation method can adjust the system controller parameters flexibly, so as to achieve the ideal design results, and the design of the system are analyzed.

A controller design method is the principles of: £¨1£©The concept of clear, easy to understand. £¨2£©Simple formula, easy to remember.

£¨3£©Not only gives the parameter calculation formula, and indicates the parameter adjustment direction.

£¨4£©Can consider the saturation nonlinear control, and gives a simple formula. £¨5£©Suitable for all kinds of feedback control systems can be simplified into a typical system.

Because this subject is relatively simple, I joined the correlation content inside to enrich the breadth and depth of the subject. In this design, I added three simple single loop DC speed regulation system, and then analyze them, compared to find their deficiencies, and thus more clearly showed the superiority of double closed loop DC speed regulating system. And through the simulation analysis of two kinds of typical double loop DC speed control system, so as to better understand and use the double loop DC speed control system.

Keywords: DC motor, double closed loop£¬MATLAB£¬Simulation£¬V-M£¬PWM-M£¬The engineering design method

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