Theoretical and Experimental Study of Radial Velocity Generation for Extending Bandwidth of Magnetohydrodynamic Angular Rate Sensor at Low Frequency.
Theoretical and Experimental Study of Radial Velocity Generation for Extending Bandwidth of Magnetohydrodynamic Angular Rate Sensor at Low Frequency.
复制标题
低频磁流体角速率传感器扩宽径向速度产生的理论与实验研究
DOI：
10.3390/s151229869
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发表时间：
2015-12-15
期刊：
影响因子：
--
通讯作者：
Chen C
中科院分区：
文献类型：
--
作者：
Ji Y;Li X;Wu T;Chen C
磁流体力学角速率传感器（MHD ARS）因其在超宽带下的超低噪声和在恶劣环境下的抗冲击性能而受到广泛关注；但其低频性能较差，不利于长时间工作。本文提出了一种结合科里奥利效应和MHD效应的改进MHD ARS，将测量范围扩展到整个带宽，其中应提供适当的径向流速度以满足改进MHD ARS的简化模型。提出了一种利用MHD泵在MHD ARS中产生径向速度的方法。设计了一种研究MHD泵径向流速的装置。通过数值模拟和实验研究了结构参数和物理参数对该装置的影响。仿真结果与实验结果吻合较好，证明了该方法产生径向速度的有效性。该研究可用于改进MHD ARS的径向速度生成和控制，这是实现两种效应在全带宽范围内结合的关键。
The magnetohydrodynamics angular rate sensor (MHD ARS) has received much attention for its ultra-low noise in ultra-broad bandwidth and its impact resistance in harsh environments; however, its poor performance at low frequency hinders its work in long time duration. The paper presents a modified MHD ARS combining Coriolis with MHD effect to extend the measurement scope throughout the whole bandwidth, in which an appropriate radial flow velocity should be provided to satisfy simplified model of the modified MHD ARS. A method that can generate radial velocity by an MHD pump in MHD ARS is proposed. A device is designed to study the radial flow velocity generated by the MHD pump. The influence of structure and physical parameters are studied by numerical simulation and experiment of the device. The analytic expression of the velocity generated by the energized current drawn from simulation and experiment are consistent, which demonstrates the effectiveness of the method generating radial velocity. The study can be applied to generate and control radial velocity in modified MHD ARS, which is essential for the two effects combination throughout the whole bandwidth.