Thrust Evaluation in Wide Frequency Range Using Active Control and Disturbance Observer

摘要: In this paper, a new method is proposed for evaluating thrust in the wide-frequency range from 0 Hz beyond pendulum resonant frequency. The uses position control and disturbance observer based on acceleration solenoid-actuator current. A controller monitors motion adjusts force of solenoid actuator such way that angular displacement kept constant. Simultaneously, evaluates both invariant time-varying components by use Spring damping coefficients originating wires, tubes, stand can be ignored due to control. calibrator, yielding constant periodically varying, biased forces, was also prototyped show evaluate prototype successfully measured frequency fro...