Applied Non-Linear Dynamical Systems
Applied Non-Linear Dynamical Systems
复制标题
应用非线性动力系统
DOI：
10.1007/978-3-319-08266-0_36
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Gallacher B
中科院分区：
文献类型：
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作者：
Gallacher B
参数激励，通过静电刚度调制，可以利用在谐振MEMS陀螺仪。在速率陀螺仪的情况下，参数激励可用于放大对角速率的响应。在更复杂的操作模式中，称为“速率积分”，陀螺仪的输出直接与速率陀螺仪的角速度相反。在这种速率积分操作模式下，参数激励确实提供了用于启动和维持振动并使阻尼扰动最小化的有效能量控制。提出了一种利用数字信号处理技术实现速率陀螺和速率积分陀螺参数激励的实用方案。实验结果表明使用参数激励的好处。通过利用参数放大的相位相关性以及科里奥利力和正交力的正交性，可以通过将特定相位的激励直接施加到感测模式来参数地放大对所施加的角速度的响应。
Parametric excitation, via electrostatic stiffness modulation, can be exploited in resonant MEMS gyroscopes. In the case of the rate gyroscope parametric excitation may be used to amplify either the response to angular rate. In the more complex mode of operation, known as “rate integrating,” the output of the gyro is angled directly as opposed to angular velocity in the case of rate gyro. In this rate-integrating mode of operation parametric excitation does offer an effective energy control used to initiate and sustain the vibration and minimize damping perturbations. A practical parametric excitation scheme implemented using digital signal processing has been developed for both the rate and rate-integrating gyro. Experimental results are presented demonstrating the benefit of using parametric excitation. By taking advantage of the phase dependence of parametric amplification and the orthogonality of the Coriolis force and quadrature forcing, the response to the applied angular velocity may be parametrically amplified by applying excitation of a particular phase directly to the sensing mode.