A dynamic test system for a magnetic levitation system

Abstract

The invention discloses a dynamic test system of a magnetic levitation system. The system mainly comprises an excitation unit, a node selection unit, a tracking band-pass filter unit, an adaptive identification unit and a frequency property extraction unit. The excitation unit is used for generating swept-frequency excitation signals. The node selection unit is used for selecting excitation inputnodes, superposing the swept-frequency excitation signals in a control system, and simultaneously selecting two measurement signal lead-out nodes according to a measured module. The tracking band-pass filter unit is used for filtering lead-out signals. The adaptive identification unit is used for performing Robust adaptive fitting of the processed node lead-out signals by using the swept-frequency excitation signals. The frequency property extraction unit is used for obtaining a frequency property curve of the measured module according to the fitting result. The system disclosed by the invention is integrated in a magnetic levitation control system; observable points are increased; a certain module in the magnetic levitation control system can be subjected to open-loop and closed-loop dynamic test; any equipment is unnecessary to be increased; the cost is saved; and the test efficiency is increased.

Description

technical field [0001] The invention relates to a dynamic test system for a magnetic levitation system, which is used to test the dynamic characteristics of a designated module of the magnetic levitation system in a magnetic levitation electromechanical device in a closed-loop state, and is especially suitable for obtaining magnetic levitation electromechanical devices such as a magnetic levitation motor and a magnetic levitation control torque gyro The dynamic characteristics of the specified module under test in the maglev system. Background technique [0002] Compared with traditional mechanical bearings, magnetic suspension bearings have the characteristics of no contact, no lubrication, no wear, small vibration, low power consumption, allowing high-speed rotation of the rotor and active control, etc., in machine tools, turbomachinery, centrifuges, blowers and aviation Aerospace and other fields have broad application prospects. The structure of the magnetic levitation ...

AI Technical Summary

Problems solved by technology

The existing dynamic characteristic test tool is mainly a dynamic signal analyzer, which is composed of hardware and analysis software, which can analyze its characteristic parameters from the electrical signal representing the physical quantity, and can analyze it from the time domain, frequency domain and amplitude domain. The signal to be tested is widely used in vibration, shock and other measurement and analysis fields, but this solution needs to add special test equipment, and cannot test the internal process variables of the magnetic levitation control system. FFT transformation requires a lot of calculations and requires high hardware. When performing a closed-loop test, the outgoing signal passes through many links, mixed with a large amount of line noise, and has a conversion delay, resulting in inaccurate test results

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