| 摘要 |
Alternating current provided at an angular frequency ( omega ) for powering an electromagnet force actuator having a leakage inductance (L1) whereby the alternating current is controlled by a voltage reference and a feedback signal indicative of the controlled current and amplified at a gain factor (K1) having a magnitude greater than or equal to the leakage inductance (L1) times the angular frequency ( omega ), whereby the electromagnet has a flat or positive spring rate.
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