Papers by Keyword: Angular Rate

Abstract: The paper considers mathematical model developed by the authors which determines the relation of design factors of transmission tooled with hydraulic cylinders to kinematic parameters of output element movement. The paper also provides description of methods to determine pumping unit efficiency for rotary transmission tooled with hydraulic cylinders.

Abstract: New ways of improving the property of the piezoelectric fluidic angular rate sensor are described in the paper. According to the improved schemes of the structure and the process, the repeatability of null voltage, the cross-coupling and stability of the sensor are improved. The numerical results have shown that the repeatability of null voltage increases from 0.2°/S to 0.1°/S and the cross-coupling decreases from 2% to 1%.

Abstract: In this paper, a mathematical model of the piezoelectric fluidic angular rate sensor is created. At first, starting from the Coriolis acceleration, obtain a comparison expression for the angular rate and the flow velocity. At second, according to the heat balance theory, solve a comparison expression for the thermal resistance wire current and flow velocity under the forced convection heat transfer condition. At last, obtain a comparison expression for the angular rate and the thermal resistance wire current. Thus a mathematical model of the piezoelectric fluidic angular rate sensor is created. Experiments prove that the average deviation between theoretical and experimental values is less than 10%.

Abstract: We report a silicon micro-machined gyroscope without the driven conformation. The output signal of the gyroscope contains the rolling, yawing, and pitching angular rates information. The principle of signal generation of the gyroscope is described with the equation, and the demodulation method of the gyroscope signals is illustrated by the experimental evidences. Toward the end, the key performances of the gyroscope are also presented.

Abstract: In order to detect the rolling、pitch and yaw angle of high-speed-spin vehicle, a novel attitude sensor system is designed by using a digital signal processor TMS320F2812. The configuration of the sensor consists of two MEMS sensing elements and signal processing circuit and micro-processor. A new silicon MEMS gyroscope based on the Coriolis effect can sense three angular rate of spin vehicle, which can provide a synthesis signal, including roll, yaw and pitch angular rate. And a MEMS accelerometer reacts on demodulating the three angular rates. The design of the hardware circuit, the algorithm and implement of software are presented. The demodulation algorithm is validated by simulation experiment on the ground and the experimental results are presented.