| Summary: | 碩士 === 南亞技術學院 === 機械工程系機械與機電工程碩士班 === 105 === As the human’s heart, motor in mechanical system provides power source for running the equipments, so the motor performances such as the responding speed and the stability are very important. In daily life, the applications of DC motors such as rolling doors, pump motors, are able to operate while beyond the static friction force. In the process it will encounter in magnetic saturation as well as the long stable time that causes the system out of control. Therefore nonlinear research has gradually attracted people’s attentions.
In this study, firstly, Matlab Simulink software was applied to construct the system control model for stability analysis. Secondly, Routh–Hurwitz(R-H) stability criterion and describe function method are used to obtain the stability parameters of controller. By using PID controller, a verification result of subsequent system shows that the response curve of R-H criterion is not acceptable. On the other hand, for better, the description of system stability by DFM demonstrates that the system can still return to the stable state under external disturbance influence.
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