Gyroscope wheel dynamic braking and sequence inhibit circuit

Details Gyroscope wheel dynamic braking and sequence inhibit circuit Gyroscope wheel dynamic braking and sequence inhibit circuit

G - Physics

01

C

79/10

G01C 19/00 (2006.01) G01C 19/04 (2006.01) H02P 3/22 (2006.01)

Patent

CA 1233348

ABSTRACT OF THE DISCLOSURE An inertial measuring unit gyroscope wheel dynamic braking and sequence inhibiting circuit is disclosed. The circuit comprises a first counter for counting a specified time interval and digital logic circuitry for applying an in-phase signal to the phases of a multiphase electric induction motor driving a gyroscope wheel during the time interval, for example, a vertical gyroscope motor wheel. By placing in-phase signals on the inputs of a multiphase electric induction motor, the motor is brought completely to rest in a short time by dynamic braking. In a preferred embodiment, a second counter counts a second specified time interval after the first time interval has term- inated, during which second time interval a second electric induction motor is dynamically braked, for example, an azimuth gyroscope wheel motor. During the time period when the motors are braking, a signal is fed back to an automatic sequencing circuit to inhibit further sequencing of the inertial measuring unit.

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