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Dead-zone-equipped DC motor system adaptive full-state constraint control method

A technology of adaptive controller and constrained control, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as load phase current distortion, influence on motor stability, voltage torque fluctuation, etc., to achieve Improve the running status, ensure stability, and improve the overall performance

Inactive Publication Date: 2018-03-16
NORTHEASTERN UNIV
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Problems solved by technology

In the DC motor system, the existence of the dead zone makes there is a deviation between the actual output voltage and the given voltage, which causes the distortion of the load phase current, and the torque of the voltage fluctuates accordingly, even affecting the stability of the motor

Method used

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  • Dead-zone-equipped DC motor system adaptive full-state constraint control method
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  • Dead-zone-equipped DC motor system adaptive full-state constraint control method

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] An adaptive full-state constrained control method for DC motor systems with dead zones, such as figure 1 As shown, the method of this embodiment is as follows.

[0039] Step 1: Establish a mathematical model of a DC motor with no vibration mode, as shown in formula (1), namely

[0040]

[0041] Among them, α 1 (t) is the angular position of the motor; J is the known inertia, f and T fare viscous friction and nonlinear friction respectively; d(t) is unknown disturbance, ||d(t)||≤d M , d M is the upper bound of d(t); T is the motor torque, which is related to the control input of the asymmetric dead zone; y∈R is the output.

[0042] Step 2: Consider the nonli...

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Abstract

The invention provides a dead-zone-equipped DC motor system adaptive full-state constraint control method, and relates to the technical field of DC motor control. According to the method, the mathematical model of a DC motor having a vibration-free mode is established and then a nonlinear input model, i.e. the dead zone model, is established, a state feedback adaptive controller is designed basedon a radial basis function neural network, angular position measurement is performed by using the optical encoder of an orthogonal decoding chip in the operating DC motor system, and the state feedback adaptive controller is accessed. The state feedback adaptive controller is adopted and inputting can be performed based on the dead zone so that the overall performance of the DC motor set and the control accuracy of the system can be enhanced, the influence of the asymmetric dead zone on the DC motor can be eliminated, the operation state of the DC motor set can be greatly enhanced and the power output stability can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of DC motor control, in particular to an adaptive full-state constraint control method for a DC motor system with a dead zone. Background technique [0002] In recent years, the development of power electronics technology, magnetic material technology, rotor dynamics, computer technology, digital signal processors, intelligent controllers and control theory has made DC motors the focus of current research. At the same time, DC motors have high efficiency High, simple control, low maintenance and other characteristics, are widely used in industrial fields. With the development of modern control theory, the application of precise control in engineering systems is becoming more and more common. However, for many engineering systems, precise control is greatly restricted due to the existence of dead zones, friction forces, and installation clearances. In the 1950s, DC servo systems began to be widely used in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 王占山刘磊高浩源柳义鹏
Owner NORTHEASTERN UNIV
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