Control system for angular displacement sensor
Simplified strapped down inertial navigation utilizing bang-bang gyro torquing
Force balanced piezoelectric vibratory rate sensor
ApplicationNo. 679462 filed on 10/04/2000
US Classes:73/504.12Vibratory mass
ExaminersPrimary: Chapman, Jeanette E.
Attorney, Agent or Firm
Foreign Patent References
International ClassG01P 009/04
AbstractA mechanical rate gyroscope including a micro-fabricated mechanical sensor. The mechanical sensor includes a first segmented drive system used to impart vibration to a mass and a transverse segmented drive system used to cancel a Coriolis force applied to the mass when the mechanical sensor undergoes rotation. The mechanical rate gyroscope further includes a force-feedback control mechanism used to provide at least one cycle of drive signals employed by the first drive system to the transverse drive system. The force-feedback control mechanism generates a feedback signal used to control the polarity of the drive signals provided to the transverse drive system. The feedback signal has a pulse repetition frequency proportional to the applied angular rate. The proportionality constant relating the applied angular rate to the pulse repetition frequency includes transduction coefficients that are less sensitive to the mechanical and electrical properties of the gyroscope.