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Transition process target value control method based on smooth switching function

A smooth switching and transition process technology, applied in the field of control, can solve problems such as overshoot or long adjustment time, and achieve the effect of convenient and fast application and less adjustment parameters

Active Publication Date: 2020-06-05
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] Therefore, to study a simple and practical control method for the target value of the transition process is to solve the practical control problems that are prone to overshoot or the adjustment time is too long in the control process.

Method used

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  • Transition process target value control method based on smooth switching function
  • Transition process target value control method based on smooth switching function
  • Transition process target value control method based on smooth switching function

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] A kind of transition process target value control method based on smooth switching function of the present invention, comprises the following steps:

[0036] Step 1: Select the upper and lower limits of the independent variable of the smooth switching function, namely t + and t - .

[0037] Such as figure 1 and figure 2 Shown, the abscissa t + =0.3,t - =0, the ordinate is the value of the smooth switching function f(x).

[0038] The second step: according to the performance requirements of the control system and the characteristics of the smooth switching function, select an appropriate smooth switching function from three types of smooth switching functions, such as power function, polynomial function and trigonometric function. The overshoot of the control system and the adjustment time of the transition process are essentiall...

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Abstract

The invention relates to a transition process target value control method based on a smooth switching function. The method comprises the following steps of: selecting an upper limit and a lower limitof an independent variable of the smooth switching function according to the transition process adjustment time of a controlled object, then, selecting a proper smooth switching function from three types of smooth switching functions including a power function type, a polynomial type and a trigonometric function type according to the requirements of overshoot and transition process adjusting time,and finally, calculating a target value in the transition process or the control quantity of the controller according to the smooth switching function. Technical guarantee is provided for realizing that the actual value can rapidly, smoothly and stably track the target value in the transition process.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a method for controlling a transition process target value based on a smooth switching function. Background technique [0002] The basic requirements of the control system mainly include rapidity, accuracy and stability, and its control process is usually divided into transition process and steady state process. The adjustment of the transition process directly affects the performance of the steady-state process, so adjusting the transition process is very important to the entire control process, and it also has practical significance and application value for the performance improvement of the control system. [0003] In the past, people paid more attention to the steady-state process, but regardless of the transition process or the steady-state process, the target value is always the same, which easily leads to problems such as excessive overshoot and long adjustment time in th...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 姜志斌刘铁军
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI