The principle of PID control is based on the adjustment of three aspects of the error of the control system.
Where P represents proportional control, I represents integral control, and D represents derived control.
Proportional control is used to directly adjust the current error, integral control is used to adjust the accumulation of error, and derived control is used to adjust the rate of change of error to achieve stability control of the system.
At the same time, PID control can also be adjusted and optimized according to different control requirements to achieve more accurate and efficient control effects. PID control has been widely used in various industrial automatic control fields, such as temperature control, mechanical engineering, chemical industry, etc., and has become an irreplaceable control method.
At present, the development of PID control shows a trend of more and more intelligent, adaptive and networked, and there are broader application prospects in the future.
The principle of PID control is that the error between the target and the actual output is taken as the input, and the error is corrected through the three control methods of proportion, integral and differential, and the control signal is finally output to realize the control of the controlled object.
Where, the proportional control parameter is directly proportional to the error, the integral control parameter is the time integral of the error, and the differential control parameter is the derivative of the error with time. The combination of the three control methods can be adjusted according to the characteristics of the specific control object.
PID control by constantly correcting the error, so that the actual output gradually close to the target value, has a wide range of applications, such as temperature control, speed control and current control.
In general, when the output of the system is obtained, the output is superimposed into the input through three operations, namely, proportion, integration and differentiation, so as to control the behavior of the system.
The principle of PID control is a control method based on error feedback.
PID controller is composed of proportional controller, integral controller and differential controller, which calculates the control quantity in real time according to the error signal of the system, so that the system can respond to changes quickly and stably and achieve the control goal.
The proportional controller controls the response speed and accuracy of the system by adjusting the proportional relationship between the output and the error amount, the integral controller improves the dynamic performance and static error of the system by accumulating error signals, and the differential controller controls the system overshoot and oscillation by calculating the error change rate.
PID controllers are widely used in various industrial control systems and automation control fields.
The principle is based on the mathematical model of the system, through theoretical calculation to determine the controller parameters. The calculated data obtained by this method may not be used directly, but must be adjusted and modified through engineering practice.
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The second is the engineering setting method, which mainly relies on engineering experience and is carried out directly in the test of the control system
PID control is a widely used feedback control algorithm used to adjust the output of a controller to control a process. The basic principle is to carry out feedback control according to the error signal, that is, by constantly adjusting the output of the controller, the error gradually tends to zero, and finally achieve the stability and accuracy of the control process.
PID controller is composed of proportional control, integral control and differential control. The proportional controller adjusts the output according to the current error; The integral controller adjusts the output according to the accumulation of historical errors. The differential controller adjusts the output according to the rate of error change to achieve good control effect. At present, PID controller has been widely used in automatic control, industrial production and other fields, and constantly integrated with other control algorithms for optimization, has become an indispensable technical means in the field of control engineering.
The principle of PID control is that after sampling and measuring the control system, by comparing the error between the actual value and the expected value, and then calculating the final control amount according to the three parameters of proportion, integral and differential, in order to achieve the purpose of making the system as close as possible to the expected state.
Among them, proportional control can realize the direct adjustment of error, integral control can eliminate the deviation problem of error, differential control can eliminate the rate of change of error, and reasonable Settings of these three can achieve good PID control effect. In addition, PID control has a very wide range of applications in practical applications, such as electronic equipment, automatic control and industrial production.