...David Schwartz; Robert T. M’Closkey Axisymmetric microelectromechanical (MEM) vibratory rate gyroscopes are designed so the central post which attaches the resonator to the sensor case is a nodal point of the two Coriolis-coupled modes that are exploited for angular rate sensing. This configuration...

...Liu Heng; Su Wei; Zhang Fu-tang This paper investigates the design of a self-oscillation loop for the gyroscope system. The dynamic equations describing this system are analyzed using the method of averaging, and a criterion for selecting the circuit parameters is established based on the analysis...

... are demonstrated with a satellite simulation that includes initial attitude error, system modeling error, and flywheel imbalance disturbance. artificial satellites attitude control gyroscopes velocity control vibrations wheels Recent work seeks to demonstrate a reduction in satellite weight...

...David Schwartz; Dong Joon Kim; Robert T. M’Closkey Electrostatic tuning of the resonant modes in microelectromechanical vibratory gyroscopes is often suggested as a means for compensating manufacturing aberrations that produce detuned resonances. In high performance sensors, however, this approach...

... (KKF) to general rigid body motion leading to the formulation of the multidimensional kinematic kalman filter (MD-KKF). By combining the measurements from the vision sensor, the accelerometers and the gyroscopes, the MD-KKF can recover the intersample values and compensate for the measurement delay...

... achieve the desired goals. aerospace control aerospace instrumentation control system synthesis gyroscopes motion control robust control 26 01 2007 31 07 2008 05 12 2008 Space stations commonly have long truss arms. The slewing motion of such arms is controlled by V...

... of the forward and backward gyroscopic poles with changes in flywheel speed. The control law is shown to be effective even for (1) large polar to transverse inertia ratios, which increases the stored energy density while causing the poles to become more speed dependent, and for (2) low bandwidth controllers...

... in part by the National Natural Science Foundation of China (Grant No. 60104003) and by Japan Society for the Promotion of Science. Dzielski , J. , Rowell , D. , and Wormley , D. , 1991 , “ Approach to Control Moment Gyroscope Steering Using Feedback Linerization ,” J. Guid. Control...

...Sungsu Park; Roberto Horowitz This paper presents a new adaptive operation strategy that can identify and, in an adaptive fashion, compensate for most fabrication defects and perturbations affecting the behavior of a MEMS z-axis gyroscope. The convergence and resolution analysis presented...

...David M. Bevly This paper demonstrates the ability of a standard low-cost Global Positioning System (GPS) receiver to reduce errors inherent in low-cost accelerometers and rate gyroscopes used on ground vehicles. Specifically GPS velocity is used to obtain vehicle course, velocity, and road grade...

...Amnon Katz, Cudworth Professor; Alton Highsmith, Engineering Research Associate The level of thermal noise in a resonant vibrating beam gyroscope is lower, the longer the beam. A limitation on the length of the beam arises from the consideration that the beam acts as a mechanical bandpass filter...

...Robert T. M’Closkey, Assistant Professor; Steve Gibson, Professor; Jason Hui, Graduate Research Assistant This paper reports the experimental system identification of the Jet Propulsion Laboratory MEMS vibratory rate gyroscope. A primary objective is to estimate the orientation of the stiffness...