A method for analyzing the stability of the power shunt regulator system based on the description function method
A technology of shunt regulator and description function method, applied in control/regulation systems, general control systems, instruments, etc., can solve the problems of wrong judgment of system stability, unable to fully display the nonlinear characteristics of the system, etc., to improve the accuracy Effect
Active Publication Date: 2016-08-31
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0007] This method is simple and easy to implement. However, due to the approximate linearization of the double-stage hysteresis structure during mathematical modeling, the mathematical model cannot fully express the nonlinear characteristics of the system, such as AC and DC characteristics. Therefore, the existing approximate linear modeling The model method has errors in judging the stability of the system under a specific parameter range
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[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0045] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...
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The present invention proposes a method for analyzing the stability of the power shunt regulator system based on the description function method, including the following steps: S1, simplifying the mathematical model of the power shunt regulator system, wherein the simplified power shunt regulator system The mathematical model includes the hysteresis comparator part and the linear part; S2, modeling the linear part to obtain the transfer function G(jω) of the linear part; S3, using the description function method to model the hysteresis comparator part Obtain the description function N(A) of the hysteresis comparator part; S4, carry on the stability of the power shunt regulator system according to the transfer function G(jω) of the linear part and the description function N(A) of the hysteresis comparator part analyze. The method for analyzing the stability of the power shunt regulator system based on the description function method of the present invention can more accurately represent the nonlinear characteristics of the power shunt regulator system, thereby improving the accuracy of the stability analysis of the power shunt regulator system.
Description
technical field [0001] The invention relates to the technical field of automatic control, in particular to a method for analyzing the system stability of a power shunt regulator based on a description function method. Background technique [0002] Hysteresis control, also known as bang-bang control, was first proposed by Pontryagin and is the most common comprehensive control form in the engineering field. In hysteresis control, according to the motion status of the system, each control variable of the optimal control is taken as the positive maximum value or negative maximum value of the allowable control range segmentally in the whole process, specifically as figure 1 and 2 shown. figure 1 is the nonlinear characteristic curve of the input and output of the hysteresis control link, where x is the input voltage and f(x) is the output voltage. figure 2 is the input and output waveform of the hysteresis control link, where, v in is the input voltage, v out is the output...
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IPC IPC(8): G05B13/04
Inventor 李虹王诗姮游小杰郑琼林郝瑞祥孙湖林飞
Owner BEIJING JIAOTONG UNIV