A self-balancing maglev rotor system based on same-frequency displacement adaptive filtering

Abstract

The invention provides a same-frequency displacement self-adaptive filtering automatic balancing magnetic levitation rotor system, which comprises a same-frequency displacement adaptive filter, a feedforward compensator, a controller, a power amplifier, an electromagnet, a rotor and a displacement sensor, wherein the rotor displacement signal is accurately divided into a displacement signal with the same frequency with the rotational speed of the rotor, and a displacement signal not at the same frequency with the rotational speed of the rotor through the same-frequency displacement adaptive filter, with the latter sent to the controller while the same-frequency current rigidity force is ensured to be zero, and the former sent to the feedforward compensator to eliminate the same-frequency displacement rigidity force; and the displacement signal with the same frequency with the rotational speed of the rotor and the displacement signal not at the same frequency with the rotational speed of the rotor are combined to eliminate same-frequency magnetic axis bearing, thereby realizing automatic balancing of the rotor. According to the invention, aiming to the problem that the detection error of rotor rotational speed seriously affects the automatic balancing precision, the same-frequency displacement adaptive filter is adopted to evaluate and track the rotational speed of the rotor, and as a result, the detection precision of the same-frequency displacement signal is obviously improved, and the automatic balancing precision of the magnetic levitation rotor is greatly improved. Therefore, the system provided by the invention is simple, feasible, and particularly a practical magnetic levitation rotor system.

Description

Technical field

[0001] The invention belongs to the technical field of magnetic suspension rotors, and specifically relates to an automatic balance magnetic suspension rotor system based on the same frequency displacement adaptive filtering, which is used for high-precision automatic balance of the magnetic suspension rotor, and is especially suitable for high-speed magnetic suspension rotor systems such as magnetic suspension control moment gyroscopes. Background technique

[0002] Magnetic suspension bearing is a new type of high-performance bearing that uses a controllable electromagnetic field to stably suspend the rotor at a given position. It has outstanding advantages such as non-contact and active controllable stiffness. It is an ideal support method for high-precision, long-life high-speed rotor systems.

[0003] Industrial rotors have residual imbalance and long-term slow change. The centrifugal force of the imbalance during high-speed rotation is one of the most important...

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