pid控制簡(jiǎn)介--中英文翻譯word版(編輯修改稿)
2024-09-05 00:51 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 g the Internet to achieve its longrange control functions.1, Openloop control systemOpenloop control system is the object of the output (volume control) on the controller does not affect the output. In this control system, do not rely on volume will be charged back to the formation of antiany closedloop circuit.2, Closedloop control systemClosedloop control system is characterized by the output of the system object (volume control) will be sent back to the impact of antioutput controller to form one or more of the closedloop. Closedloop control system has positive feedback and negative feedback, if the feedback signal and the system to set the value of the signal the other hand, is referred to as negative feedback, if the same polarity is called positive feedback, the general closedloop control system using negative feedback, also known as negative feedback control system. Closedloop control system has many examples. For example, people with negative feedback is a closedloop control system, the eye is the sensor to act as a feedback, the human body system through the constant variety of the right to make amendments to the final action. If there are no eyes, there is no feedback loops, it became an openloop control system. Another example, when a fullautomatic washing machine with a real continuously check whether the washed clothing, and wash off automatically after the power supply, it is a closedloop control system.3, Step response Step response refers to a step input (step function) when added to the system, the system output. Steadystate error is the system response into the steadystate, the system39。s desired output and actual output of the difference. The performance of control system can be stable, accurate and fast three words to describe. Stability is the stability of the system, a system must be able to work, first of all must be stable, from the step response should be a convergence point of view。 quasicontrol system refers to the accuracy, control precision, stability is usually state error description, it said the system output steadystate value and the difference between expectations。 fast control system refers to the rapid response, and usually to a quantitative description of the rise time.4, Theory and the characteristics of PID control In engineering practice, the most widely used control laws regulate the proportional, integral, differential control, referred to as PID control, also known as PID regulator. PID controller has been available for nearly 70 years of history, which in its simple structure, stable, reliable, easy to adjust and bee the main industrial control technologies. When charged with the structure and parameters of the object can not pletely grasp, or lack of accurate mathematical model, control theory it is difficult using other techniques, the system controller structure and parameters have to rely on experience and onsite testing to determine when the application PID control of the most convenient technology. That is, when we do not fully understand the
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