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Novel anti-integral-saturation PID control method

A control method and integral control technology, applied in the field of control, can solve problems such as reliability, stability enhancement, increase anti-integral saturation correction coefficient, stability problems, etc., and achieve the effect of accelerating desaturation speed, simple structure, and simple method

Active Publication Date: 2016-02-03
QUANZHOU INST OF EQUIP MFG
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Problems solved by technology

However, its parameters are selected for specific controlled objects, affected by the system structure and parameters, etc., the adaptability and robustness are relatively poor, and there are even problems in stability.
[0005] In addition, similar patents CN201410529586-PID control system anti-integral saturation and intelligent integration method for suppressing overshoot, patent CN201210019001-motor speed control system anti-saturation PID control method, etc. mentioned methods such as adding anti-integral saturation correction coefficients, models, compensation coefficients, etc. , increasing the complexity of PID control, the reliability and stability need to be strengthened, and different controlled objects still cannot meet the requirements of self-adaptation

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, it will be further described in detail below in conjunction with the accompanying drawings and a discrete PID implementation. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit it, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0026] A new anti-integral windup PID control method, taking the discrete form of PID as an example, such as figure 1 As shown, the specific implementation steps are as follows:

[0027] Step 1: At the kth moment of the discrete system, calculate the error value e(k) of the system through the given input value Ref(k) and the output feedback value Fdb(k) of the system;

[0028] Step 2: Calculation of proportional control volume, integral control volume, differential...

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Abstract

The invention discloses a novel anti-integral-saturation PID control method. An anti-integral-saturation link is added into a common PID control method. When PID control is saturated, the anti-integral-saturation link computes a current integration item in combination with a proportional item and differential item. The novel anti-integral-saturation PID control method is easy to implement, not provided with any extra parameter, and capable of effectively inhibiting integral saturation, accelerating de-saturation time, decreasing overshoot, and guaranteeing the robustness, the reliability, and the stability of a system, and can be used in PID control systems in various variational forms.

Description

technical field [0001] The invention belongs to the technical field of control, and in particular relates to a novel anti-integral saturation PID control method. Background technique [0002] PID control is a linear combination of proportional (P), integral (I), and differential (D) to form a PID control variable to control the controlled object. Because of its simple algorithm, good robustness, and high reliability, it is widely used in process control and motion control systems. However, in the actual control system, due to limiting factors such as power and energy, the control quantity cannot be infinitely output. For example, the maximum voltage, maximum current and other parameters of the controlled object are limited, and the control quantity must be limited within a reasonable range. Therefore, it is necessary to design the PID control quantity, such as limiting the limit and increasing anti-integral saturation parameters, etc., to ensure the normal operation of the ...

Claims

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Application Information

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IPC IPC(8): G05B11/42
Inventor 汪凤翔柯栋梁黄东晓陶鹏于新红
Owner QUANZHOU INST OF EQUIP MFG
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