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Chaotic oscillation control method of brushless DC motor

A technology of a DC motor and a control method, applied in the direction of torque ripple control, model/simulation of control purposes, etc., can solve the problem of rare chaotic oscillation of BLDCM, and achieve the effects of excellent control performance, simple design and simple structure

Inactive Publication Date: 2016-10-26
GUANGXI NORMAL UNIV
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Problems solved by technology

So far, although scholars have done a lot of research on the control of chaotic systems by using the finite-time stability theory, the research on the control of BLDCM chaotic oscillations based on the finite-time stability theory is still rare.

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  • Chaotic oscillation control method of brushless DC motor
  • Chaotic oscillation control method of brushless DC motor
  • Chaotic oscillation control method of brushless DC motor

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Embodiment Construction

[0044] A chaos control method of brushless DC motor with finite time stability theory, the specific steps are as follows image 3 Shown, including:

[0045] Step 1. Establish the mathematical model of the brushless DC motor as shown in formula (1):

[0046]

[0047] Where, ω, I q , I d Are the system state variables, respectively representing the rotor angular velocity, d-axis stator current and q-axis stator current; σ, η, γ and δ are system parameters, all of which are positive values, In the operation of BLDCM, the size of the system parameters will be affected by the working environment such as temperature and noise. Research has found that the system parameters σ, η, γ and δ within certain value ranges, BLDCM will produce chaotic oscillation. figure 1 It is the chaotic phase diagram of BLDCM when the system parameters σ=4.55, η=4.8, γ=5.58, and δ=1.0.

[0048] Step 2. Controller design based on finite time stability theory:

[0049] 2.1 The concept of finite time stability theory...

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Abstract

The present invention discloses a chaotic oscillation control method of a brushless DC motor based on a finite time stability theory. The method comprises the following steps of 1) establishing a mathematical model of the brushless DC motor; 2) carrying out the controller design based on the finite time stability theory; 3) simulating and verifying the numerical value of the controller design based on the finite time stability theory. The advantages of the present invention are that: (1) by controlling the parameter change, a system is still located in a stable state, and has a stronger robustness; (2) compared with a general control method, a finite time stability control method has the characteristics of being simple in structure, faster in convergence speed and excellent in control performance, etc.

Description

Technical field [0001] The invention relates to the field of nonlinear control of chaotic motors, in particular to a method for controlling chaotic oscillation of a brushless DC motor based on a finite time stability theory. Background technique [0002] Brushless DC Motor (BLDCM) has the advantages of high torque, high speed, small size, low failure rate, etc., and is widely used in various fields such as industry and agriculture, transportation, and defense technology. Since the stable operation of BLDCM directly affects the efficiency of production automation, its stable operation has attracted widespread attention from experts and scholars. Hemati et al. found through research that the BLDCM system will produce bifurcation, chaos and other instabilities under certain parameter conditions. Its main external manifestations are intermittent oscillations of torque and speed, unstable control performance, etc., chaotic Existence is not only extremely destructive to the stability ...

Claims

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Application Information

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IPC IPC(8): H02P6/10H02P6/34
CPCH02P6/10
Inventor 汪慕峰韦笃取张晓航缪海龙王军刘利花梅春草
Owner GUANGXI NORMAL UNIV
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