| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系碩士班 === 93 === Nowadays, most process control in industries use P.I.D controller. The reasons that the PID controllers are widely used, are its relatively simple structure, easy to design and implement in practice. However, since tuning of any parameter in the PID control system will inevidently affect the other ones, which may result a poor performance, it is really a challenge work to find an effective method for tuning parameters; As to single input single output system, no matter it is stable, unstable, or any system with time-delay, conventional PID controller parameter designed method can get very good set point response, as well as having good rejection to the load disturbance. In different process, having these PID tuning formula, and knowing some information of the process, we can easily design the PID parameters for meeting the system’s performance criterions. The surveys of existing literatures for the design of PID controller and parameter tuning methods in this thesis, are focused on the typical single input single output systems, inner feedback loop, internal model control (IMC) and Smith predictor. We find all the proposed parameters design methods may guarantee the good response and the load disturbance rejection. However, in view of robust stability, each method has its limitation in applying to a specified system. Through exhaustive analysis and integration, this thesis makes a systematic comparison of parameter-tuning method for those existing PID control systems, and provides some suggestions which in turn will benefit those engineers who are working in the industries or in the laboratories.
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