比例積分微分控制器外文翻譯-全文預(yù)覽
【正文】 ing used to control the speed of the load and mand the force or torque being applied by the prime mover, then it is beneficial to take the instantaneous acceleration desired for the load, scale that value appropriately and add it to the output of the PID velocity loop controller. This means that whenever the load is being accelerated or decelerated, a proportional amount of force is manded from the prime mover regardless of the feedback value. The PID loop in this situation uses the feedback information to effect any increase or decrease of the bined output in order to 無(wú) 錫 職 業(yè) 技 術(shù) 學(xué) 院 外文翻譯 4 reduce the remaining difference between the process setpoint and the feedback value. Working together, the bined openloop feedforward controller and closedloop PID controller can provide a more responsive, stable and reliable control system. Another problem faced with PID controllers is that they are linear. Thus, performance of PID controllers in nonlinear systems (such as HVAC systems) is variable. Along with the development of Fuzzy Mathematics, control engineers gradually pay much attention to the idea of Fuzzy Control, thus promoting the invention of fuzzy controllers. However, simple fuzzy controller has its own defect, where control effect is quite coarse and the control precision can not reach the expected level. Therefore, the Fuzzy Adaptive PID Controller is created by taking advantage of the superiority of PID Controller and Fuzzy Controller. Taken this controller in use, the corresponding error and its differential error of the control system can be feed backed to the Fuzzy Logic Controller. Moreover, the three parameters of PID Controller is determined online through fuzzification, fuzzy reasoning and defuzzification of the fuzzy system to maintain better working condition than the traditional PID controller. Meanwhile， the design method and general steps are introduced of the Parameter selfsetting Fuzzy PID Controller. Eventually, the Fuzzy Inference Systems Toolbox and SIMULINK toolbox are used to simulate Control System. The results of the simulation show that Selforganizing Fuzzy Control System can get a better effect than the Classical PID controlled evidently. Keywords: Classic PID contro
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