pid控制系統(tǒng)外文翻譯-展示頁
2024-11-14 14:31本頁面
【正文】 egral, differential, called PID control, called PID. PID controller has been developed nearly 70year history, with its simple structure, stability, reliability, easy to adjust and bee one of the key technologies in industrial control. When the object is not fully grasp the structure and parameters, or any precise mathematical model, Other technology difficult to control, The controller 無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計說明書 (外文翻譯 ) 4 structure and parameters have to rely on experience and onthespot tests to determine. Then use the most convenient PID control. When a system that we do not fully understand and object, or can not be an effective means to measure system parameters, PID control with the most suitable technology. PID control, and reality have PI PD control. PID controller is based on the error, using a proportional, integral and differential control of the calculated volume control. Proportional (P) control Proportional control is a simple control method. And the controller output signal proportional to input error. When there is only a proportion of output steadystate error control system (Steady error). Integral (I) Control Integral in control, the controller output and input error signal proportional to the integral relationship. For a control system, if there after entering the stable steadystate error. she claimed that the control system is referred to a steadystate error or poor system (System with Steady Error state). To eliminate static error, the controller must introduce the integral. Integration depends on the time integral of the error, with the increase in time, integral increases. Thus, even if the error is very small, subplot will increase with the increase of time. Output increased to enable it to promote the steadystate error controller further reduced, until zero. Therefore, the ratio of plus integral (PI) controller, the system can be no stability in the state into steadystate error Differential (D) control Differential control, the controller output and input error differential signal (that is, the rate of change of error) in proportion. Automatic control system to overe the error in the adjustment process may occur even oscillatory instability. The reason is because there is a greater inertial measurement unit (link) or backward (delay) ponents. inhibit the role of error, the changes are always behind the changes in error. The solution is to change the role of inhibition error get ahead in error close to zero. inhibit the role of error should be zero. This means that the introduction of the 無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計說明書 (外文翻譯 ) 5 controller only proportional items often is not enough. only items of the ratio of the amplitude error is enlarged, and now need to increase the differential item. it forecasts changes in the tre nd, with the proportion of + differential controller early enough so error control will be able to curb the role of zero, or even negative, in order to avoid the amount charged with a serious overshoot. Therefore,
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