Asynchronous motor instruction filtering discrete control method based on observer

An asynchronous motor, discrete control technology, applied in observer control, motor control, AC motor control and other directions, can solve the problems of performance degradation, unmeasurable system state, inaccurate measurement, etc., to improve reliability and avoid computational complexity , to achieve the effect of stable control

Active Publication Date: 2022-03-11
QINGDAO UNIV
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  • Description
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Problems solved by technology

In addition, in the actual operation of the system, it is very common that the system state is not measurable or the measurement is inaccurate due to reasons such as cost constraints and sensor performance degradation caused by vibration during use

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  • Asynchronous motor instruction filtering discrete control method based on observer
  • Asynchronous motor instruction filtering discrete control method based on observer
  • Asynchronous motor instruction filtering discrete control method based on observer

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] figure 1 It is a schematic diagram of a compound controlled object composed of observer-based asynchronous motor command filtering discrete controller, coordinate transformation unit and SVPWM inverter in the embodiment of the present invention. The components involved in the figure include observer-based asynchronous motor command filtering Discrete controller 1, coordinate transformation unit 2, SVPWM inverter 3, rotational speed detection unit 4 and current detection unit 5, ω represents the angular velocity of the rotor, U α and U β Indicates the voltage in the two-phase rotating coordinate system, and U, V and W indicate the three-phase AC voltage. Among them, the speed detection unit 4 and the current detection unit 5 are mainly used to detect the current value of the speed-related variables of the discrete system of the asynchron...

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Abstract

The invention belongs to the technical field of asynchronous motor position tracking control, and particularly discloses an asynchronous motor instruction filtering discrete control method based on an observer. According to the asynchronous motor instruction filtering discrete control method, an asynchronous motor discrete system model is established in combination with an Euler method for the problem of easy input saturation of an asynchronous motor; constructing a dimension reduction observer to estimate the rotor position and angular velocity of the asynchronous motor; an instruction filtering control technology is introduced into a traditional backstepping method, and the problems of calculation complexity and causal contradiction existing in a backstepping control algorithm are solved. A high-order nonlinear term in an asynchronous motor discrete system is processed by using an RBF neural network, and an asynchronous motor instruction filtering discrete controller based on the observer is constructed. The method can overcome the influence of input saturation, facilitates the improvement of the accuracy of system control, and guarantees the quick and stable operation of the system.

Description

technical field [0001] The invention belongs to the technical field of position tracking control of asynchronous motors, in particular to an observer-based command filter discrete control method for asynchronous motors. Background technique [0002] Asynchronous motors (Induction Motors, referred to as IMs), also known as induction motors, are an AC motor that generates electromagnetic torque through the interaction of the air gap rotating magnetic field and the induced current of the rotor winding, thereby realizing the conversion of electromechanical energy into mechanical energy. In recent years, with the rapid development of information technology, automation technology and microelectronics technology, asynchronous motors are widely used in industrial and agricultural production. However, since the asynchronous motor system is a high-order, strongly coupled, nonlinear multivariable system, it is easily affected by uncertain factors such as load disturbances and parameter...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/00H02P23/12H02P25/02
CPCH02P23/0018H02P23/12H02P25/02H02P2207/01
Inventor 于金鹏张加伟徐雨梦刘加朋于慧慧王栋诚林文娟朱一平司晨怡朱钰
Owner QINGDAO UNIV
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