Method for controlling rotary speed of magnetically suspended flywheel

Abstract

The invention relates to a method for controlling a rotary speed of a magnetically suspended flywheel. The method comprises the following steps of: according to a feedback value of the rotary speed of the magnetically suspended flywheel, performing fuzzy adaptive kalman filtration of the feedback value of the rotary speed, performing rotary speed loop control of the magnetically suspended flywheel according to the rotary speed reference value and the filtered rotary speed value, adaptively adjusting the rotary speed loop control parameters according to the rotary speed reference value and the rotary speed deviation, and outputting the current reference value by the rotary speed loop; performing the current loop control according to the current reference value and the current feedback value; and finally, by adjusting the current value of a motor winding, realizing the high-precision control of the rotary speed of the magnetically suspended flywheel in the full-rotary speed range. The method belongs to the technical field of aerospace control, and can also be applied to the high-precision control of other dc brushless motors.

Description

technical field [0001] The invention relates to a method for controlling the rotational speed of a magnetic levitation flywheel, which is suitable for high-precision control of the rotational speed of a magnetic levitation flywheel, and belongs to the technical field of aerospace control. Background technique [0002] Magnetic levitation flywheel has become an important development direction of spacecraft attitude control actuators such as space stations, space maneuvering platforms and agile maneuvering satellites because of its frictionless characteristics, which make it easy to achieve high precision and long life. To realize the high-precision speed control of the maglev flywheel, high-precision speed feedback and speed control are necessary conditions. [0003] At present, there are two main methods of speed measurement: hall position sensor and photoelectric encoder position sensor. The problem of the hall position sensor for speed measurement is that its signal outpu...

AI Technical Summary

Problems solved by technology

The problem with the hall position sensor for speed measurement is that its signal output frequency is too low, and the speed detection accuracy is very poor. Therefore, the hall position sensor is generally not used for high-precision speed control.

The problem of using a photoelectric code disc for speed detection is: when using a photoelectric code disc for speed measurement, because the frequency of the output signal of the photoelectric code disc is very high, it is easy to be interfered by strong electricity. deviation

Using general PID control speed accuracy can not meet the requirements, using complex control algorithm, the reliability can not be guaranteed

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