DC (direct current) motor speed control method based on hybrid self-adjusting fuzzy PID control

A technology of DC motor and speed regulation method, which is applied in the direction of DC motor speed/torque control, control system, electronic commutation motor control, etc., which can solve the problem of poor anti-interference ability, unsatisfactory high-precision servo control system, and difficult to achieve control Parameter optimization and other issues to achieve the effect of stable control state and suppression of nonlinearity

Inactive Publication Date: 2018-11-13
CHANGCHUN UNIV OF TECH
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Problems solved by technology

[0003] At present, PID control is widely used in the brushless DC motor speed control system. However, the brushless DC motor system is a nonlinear, multi-variable, and strongly coupled time-varying s

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  • DC (direct current) motor speed control method based on hybrid self-adjusting fuzzy PID control
  • DC (direct current) motor speed control method based on hybrid self-adjusting fuzzy PID control

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[0023] Hereinafter, the present invention will be described in detail in conjunction with specific embodiments. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as isolated, and they can be combined with each other to achieve better technical effects.

[0024] The invention provides a DC motor speed regulating method based on hybrid self-regulating fuzzy PID control. Including the establishment of the model and the speed regulation method, the establishment of the model is mainly to establish a hybrid self-adjusting fuzzy PID control model. The method of speed regulation is to first compare the actual speed n of the motor with the given speed n r Comparing and calculating, the final deviation e and deviation change rate ec are obtained. The above two deviations are fuzzified in the fuzzy controller, and the fuzzified E and EC are transferred to the fuzzy controller for inference work...

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Abstract

The invention provides a DC (direct current) motor speed control method based on hybrid self-adjusting fuzzy PID control. The method comprises following steps: firstly, an actual rotating speed n anda given rotating speed nr of a motor are subjected to comparative calculation, a final deviation e and a deviation change rate ec are obtained, the two deviations are subjected to fuzzification in a fuzzy controller, and E and EC after the fuzzification are given to the fuzzy controller for reasoning work, so that kp1 and ki1 after defuzzification are obtained; parameters in a PI controller are adjusted timely, transient and steady conditions in a control process are distinguished with a switching function, finally, a control result is input into a brushless DC motor to realize rotating speedcontrol, and the rotating speed of the motor is controlled. Furthermore, fuzzy control is adopted and is not required to depend on an accurate mathematical model of the controlled motor, so that the controlled motor is more stable in a control state and the nonlinear condition of the controlled motor can be effectively inhibited.

Description

technical field [0001] The invention belongs to the technical field of DC motor speed regulation, and in particular relates to a DC motor speed regulation method based on hybrid self-adjusting fuzzy PID control. Background technique [0002] The brushless DC motor uses an electronic commutator composed of an inverter and a rotor position sensor to replace the mechanical commutator and brushes of the traditional DC motor, which overcomes the interference problems such as noise and sparks caused by the commutation of the traditional DC motor. It maintains the excellent speed regulation characteristics of the DC motor, and has the advantages of reliable operation and convenient maintenance of the AC motor. Therefore, brushless DC motors have been widely used in motion control systems. [0003] At present, PID control is widely used in the brushless DC motor speed control system. However, the brushless DC motor system is a nonlinear, multi-variable, and strongly coupled time-va...

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Application Information

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IPC IPC(8): H02P6/00H02P6/06H02P7/00
CPCH02P6/00H02P6/06H02P7/00
Inventor 胡黄水赵思远杨兴旺
Owner CHANGCHUN UNIV OF TECH
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