Global ETD Search

1	ADAPTIVE SLIDING MODE CONTROL WITH APPLICATION TO A MEMS VIBRATORY GYROSCOPE Fei, Juntao January 2007 (has links) No description available. Engineering, Mechanical adaptive sliding mode control MEMS vibratory gyroscope angular velocity
2	Attitude Reference Devices for Gun-Launched Rocket Vehicles Hill, William Barry 10 1900 (has links) <p> A proposal is made to extend the present capabilities of gun-launched rocket vehicles to include attitude control during flight. The problems involved are stated and design criteria for possible sensors are listed. A review of presently available sensing devices is made and rejection of unsuitable instruments is based on fundamentals of their design and operation. </p> <p> A report is made upon the sensors which most adequately fulfil the harsh environmental requirements of gun-launch. These sensors are infrared-horizon sensors and a tuning fork vibratory gyroscope. A preliminary design is given for the tuning fork gyroscope a well as a summary of fundamental design considerations. </p> / Thesis / Master of Engineering (ME) mechanical engineering attitude reference device gun-launched rocket vehicle
3	Interface circuits for readout and control of a micro-hemispherical resonating gyroscope Mayberry, Curtis Lee 12 January 2015 (has links) Gyroscopes are inertial sensors that measure the rate or angle of rotation. One of the most promising technologies for reaching a high-performance MEMS gyroscope has been development of the micro-hemispherical shell resonator. (μHSR) This thesis presents the electronic control and read-out interface that has been developed to turn the μHSR into a fully functional micro-hemispherical resonating gyroscope (μHRG) capable of measuring the rate of rotation. First, the μHSR was characterized, which both enabled the design of the interface and led to new insights into the linearity and feed-through characteristics of the μHSR. Then a detailed analysis of the rate mode interface including calculations and simulations was performed. This interface was then implemented on custom printed circuit boards for both the analog front-end and analog back-end, along with a custom on-board vacuum chamber and chassis to house the μHSR and interface electronics. Finally the performance of the rate mode gyroscope interface was characterized, showing a linear scale factor of 8.57 mv/deg/s, an angle random walk (ARW) of 34 deg/sqrt(hr) and a bias instability of 330 deg/hr. uHRG µHRG MEMS CVG Coriolis TIA AM FM Micro-hemispherical resonating gyroscope 3D-HARPSS High-Q Gyroscopes Gyroscopic instruments Gyroscope Vibratory Coriolis vibratory gyroscope Interface Circuits Transimpedance amplifier Rate integrating Inertial sensor Sensor Oscillator Analog Control Electrostatic Capacitive Noise Characterization Mode-matching Wine-glass Duffing Non-linearity Feed-through cancellation Vibratory gyroscopes Polysilicon

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