High precision speed measurement method of flywheels in integrated energy-storage and attitude-control system

To accomplish the wide range and high precision speed measurement in the attitude control and energy storage flywheel application, a new measurement method was put forward based on the analysis of the errors. In the low speed region, the time of several integrated flywheel speed pulse signal was measured. While the speed exceeds a certain threshold speed, the pulse number in a certain time was counted. For proving the feasibility of this method, the speed measurement experiment was done by using high precision arbitrary waveform generator and universal counter produced by Agilent Company, and the experiment results showed that the suggested speed measurement method can meet the demand of the integrated flywheel energy storage and attitude control system with the advantages of high precision and wide range.