How to set the PID parameters adjustment

Abstract: how to set the PID parameter adjustment of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. PID is proportional differential and integral calculus, specific you can consult in the automatic control course in detail! Positive action and reaction in the temperature control is when positive role is heated, reaction is refrigeration control. PID control profile, the current industrial automation level has become a measure. More flow meter manufacturers choose model price quote you are welcome to inquire, here is how to set the PID parameters to adjust the article details. PID is proportional differential and integral calculus, specific you can consult in the automatic control course in detail! Positive action and reaction in the temperature control is when positive role is heated, reaction is refrigeration control. Introduction of PID control at present, the industrial automation level has become an important symbol to measure the level of modernization in all walks of life. At the same time, also the development of the control theory of the classical control theory, modern control theory and intelligent control theory of three stages. A classic example of intelligent control are fuzzy automatic washing machine, etc. Automatic control system can be divided into the open loop control system and the closed loop control system. A control system including the controller, sensors, transmitters, actuator, input/output interface. Controller output through the output interface, actuators, add to the controlled system; was charged with the amount of the control system, through the sensor, transmitter, through the input interface to the controller. Different control system, its sensors, transmitters, actuators are not the same. Such as pressure control system pressure sensor must be used. Electric heating control system of the sensor is a temperature sensor. At present, the PID control and the controller or intelligent PID controller ( Instrument) Has a lot of, the products have been widely used in engineering practice, there are all kinds of PID controller products, companies have developed intelligent controller with PID parameters self-tuning functions, including intelligent PID controller parameters can be automatically adjusted by adjusting or self correction, adaptive algorithm to realize. Have used PID control to achieve pressure, temperature, flow, liquid level controller, can realize the PID control function of the programmable controller ( PLC) , and it can realize PID control system of PC and so on. Programmable controller ( PLC) Is the use of the closed loop control module to realize the PID control, the programmable controller can be directly connected, such as Rockwell PLC - 5, etc. And can realize the PID control function of the controller, such as Rockwell Logix products series, it can directly connected, use of network to realize the remote control function. 1, the open-loop control system open loop control system refers to the output of the controlled object, Controlled amount) Has no effect on the output of the controller. In this kind of control system, not depend on the amount will be charged back to send back to form a closed loop. 2, the characteristics of the closed loop control system closed-loop control system is the output of the controlled system ( Controlled amount) Will affect the output of the controller, send back, the formation of one or more of the closed loop. Closed-loop control system with positive feedback and negative feedback, if the feedback signal, in contrast to the given value signal, it is called a negative feedback, if the polarity is the same, it is called a positive feedback, generally closed loop control system adopts negative feedback, also called negative feedback control system. Examples of closed loop control system a lot. Such as a person is one who has a negative feedback closed-loop control system, the eye is the sensor, ACTS as the feedback, the human body system can through constant correction after zui to make the correct actions. If without eyes, there is no feedback loop, has become an open loop control system. Another example, when a real full-automatic washing machine is can check whether clothes washed in a row, and can automatically cut off the power supply after the wash, it is a closed-loop control system. 3, step response step response refers to the one step input to the system, the output of the system. Steady-state error refers to the response of the system after entering the steady state, the difference between the desired output and the actual output of the system.

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