Prediction function control method for PMSM servo system

A predictive function control and servo system technology, applied in the control system, control generator, vector control system, etc., can solve the problem of not considering the sudden change of rotor load disturbance, the deterioration of the control performance of the servo system, and the inability to eliminate the influence of the sudden change of rotor load disturbance, etc. question

Inactive Publication Date: 2015-07-15
SHANGHAI UNIV +1
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Problems solved by technology

Literature (Xia Zezhong, Zhang Guangming. Predictive function control and its simulation research in servo system [J]. Chinese Journal of Electrical Engineering, 2005, 25(14): 130-134.) proposed a predictive function control method for a typical servo control system , the simulation results show that this method can improve the tracking performance in the servo system, however, in practical industrial ...

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  • Prediction function control method for PMSM servo system
  • Prediction function control method for PMSM servo system
  • Prediction function control method for PMSM servo system

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[0036] The accompanying drawing discloses a non-restrictive structural schematic diagram of a preferred embodiment involved in the present invention, and the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Such as figure 1 As shown, it discloses a system block diagram of a predictive function control method for a PMSM servo system according to the present invention, which uses a photoelectric encoder to collect the position signal θ of the PMSM servo motor. The photoelectric encoder is installed inside the motor, and at the same time The current signal of the motor is collected by the Hall current sensor u i v , and apply Clarke transform and Parker transform to get i d i q , the motor position signal θ, motor current signal i q Feedback to the Kalman filter, use the Kalman filter to observe the rotor load torque, rotor speed and rotor position, and feed back the observation results to th...

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Abstract

The invention discloses a prediction function control method for a PMSM servo system. The method comprises the following steps: firstly collecting rotor position signals theta and motor current signals iq of the PMSM servo system, observing rotor load disturbance through a Kalman filter, so as to obtain a rotor load torque T^L and a rotor rotate speed omega^, then feeding back the rotor load torque T^L and optimal control quantity i*q to a rotate speed predication unit of prediction function control (PFC), so as to obtain a prediction value (omega)m of the rotor rotate speed, inputting the rotor rotate speed omega^ and the predication value (omega)m of the rotor rotate speed into an error predication unit of predication function control, so as to obtain a rotate speed error value e of a rotor, and finally inputting e, (omega)m and omega^ into an optimal control unit of predication function control, so as to obtain optimal control quantity i*q to realize the high-precision control of the PMSM servo system under disturbance influence. The method organically combines the Kalman filter and predication function control, and the complementation of the Kalman filter and predication function control can optimize the control quantity of the servo system and improve the control precision and disturbance rejection capacity of the PMSM servo system.

Description

technical field [0001] The invention relates to a predictive function control method for a permanent magnet synchronous motor (PMSM) servo system, belonging to the technical field of high-precision servo control systems. Background technique [0002] With the improvement of the control precision of the servo system, the disturbance has become an important problem that cannot be ignored. Disturbances often come from uncertain factors neglected in the modeling process, sudden load changes and parameter changes during system operation. The existence of these factors makes the performance of the closed-loop system worse or even unstable. Therefore, in order to improve the control performance of the servo system, its controller must overcome the influence of external disturbance on the system. [0003] In the PMSM servo control system, as a multivariable, nonlinear and strongly coupled controlled object, PMSM has the characteristics of nonlinearity and uncertainty. In order to...

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Application Information

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IPC IPC(8): H02P21/00
Inventor 王爽朱文举黄苏融张琪李光耀李伟伟
Owner SHANGHAI UNIV
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