id控制的意義中英文翻譯資料-全文預(yù)覽
【正文】 the PID controller parameters are adjusted through the intelligent or selfcorrection, adaptive algorithms to achieve. PID control are achieved using pressure, temperature, flow, liquid level controller, PID control can achieve programmable controller (PLC), also allows PID control of PC systems, etc.. Programmable Logic Controller (PLC) is to use the closedloop PID control module to achieve control, programmable logic controller (PLC) can be connected directly with ControlNet, such as Rockwell39。s output through the output interface, the implementing agency, added to the charged system。s expected output and actual output of the difference. Control system performance can be stable, accurate, fast and three words to describe. Stability is the stability of the system (stability), a system to work properly, first of all must be stable, from the step response appears to be that convergence。s output and the input error signal proportional to the integral. An automatic control system into the steady state if there is steadystate error, claimed that this control system is called a steadystate error or poor system (System with Steadystate Error). In order to eliminate steady state error, the controller must introduce the integral term. Integral term of the error depends on the time integral, as time increases, integral term will increase. Thus, even if the error is very small, integral term will increase over time to increase its promotion of the controller output increases to further reduce the steadystate error, until zero. Therefore, the ratio of + integral (PI) controller allows the system to enter steady state of no steady state error.Differential (D) control In the differential control, the controller output and differential input error signal (ie, rate of change of error) is proportional to. Automatic control system to overe the errors in the adjustment process of oscillation or even instability may occur. The reason is because of greater inertia ponents (links), or a lag (delay) ponent, can inhibit the role of error, the changes always lag behind changes in the error. The solution is to change the role of inhibition of error, ahead, that is close to zero in the error and suppress the role of error should be zero. This means that the controller only the introduction of the ratio item is often not enough, the proportion of item only to enlarge the role of th
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