Topic： Micor & Nano Engineering (MNE2019) presentation

Time： Thursday 11:00pm, November 21, 2019

Location：Meeting Room A404, West Building 5, Qujiang Campus

Presenter：Yuxing DUAN (段宇兴)

Conference Name: Micor & Nano Engineering (MNE2019)

Conference Time： September23-26, 2019

Conference Location：Rhodes, Greece

Information of conference paper：

Title: Design and performance analysis of a microgravity accelerometer with quasi-zero stiffness characteristic

Author: Yuxing Duan , Xueyong Wei*, Minghui Zhao, Ziming Ren, Huiying Zhao and Juan Ren

Abstract: We report a nonlinear electrothermal-loaded accelerometer for microgravity measurement, achieving quasi-zero stiffness nearby its static equilibrium position. Thehigh mechanical sensitivity is attributed analytically to the compression of the spring, in addition to the geometric parameters matched with quasi-zero stiffness characteristic. To make the designed spring compressed effectively, a V-shape electrothermal actuators was adopted after analysis. The FEA results in multiphysics distinctly show the different property of the accelerometer when it is at applied voltage or not, verifying that the electrothermal-loaded mechanism exerts an effective influence on accelerometer’s sensitivity. At the applied voltage of 22.3 V, the natural frequency of the accelerometer decreases from 501.95 Hz to 8.24 Hz, while the other two higher mode frequencies remain above 500 Hz. This mechanism introduces a narrower linear region of output displacement but a rather large displacement response, that is, the accelerometer’s vertical stiffness is approximately 0.007 N/m and realize the quasi-zero stiffness.