| 摘要 |
The invention is an integrated pick-off, torquer, and reference signal generator system for a two-degree-of-freedom flexure-suspended free-rotor gyroscope and a miniature gyroscope incorporating such an integrated system. The three gyroscopic functions are combined within apparatus including a single coil assembly using a radially permanent magnetized ring located on the gyroscope rotor wheel, with a plurality of pick-off coils mounted compactly with respect to the instrument case and each partially inserted in an air gap provided at the gyroscope rotor wheel periphery. The spacial flux magnitude variation around the rotor wheel in the air gap generates an alternating current in each pick-off coil as the rotor spins. The difference in the voltages induced in diametrically opposed pick-off coils provides an output pick-off signal, while the sum of the signals induced in all coils provides an alternating phase reference voltage. Since there is a finite unidirectional magnetic field in the air gap, controlled direct currents may be applied to the pick-off oils as an effective and economical way of torquing the gyroscope rotor without inducing any spurious error signals in the pick-off system. |
