Fluidic mechanism for dual-axis gyroscope

• Published in: Mechanical systems and signal processing 2018-08, Vol.108, p.73-87
• Main Authors: Dau, Van Thanh, Dinh, Thien Xuan, Tran, Canh Dung, Bui, Phong Nhu, Vien, Du Dinh, Phan, Hoa Thanh
• Format: Article
• Language: English
• Subjects: 3D transient simulation; Fluid mechanics; Fluidic gyroscope; Gyroscopes; Hotwire; Jet flow circulation; Lump model; Mathematical models; Numerical analysis; Resonant frequencies; Resonant frequency; Sensitivity; Studies
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2018.02.017

•We developed a miniaturized device that can generate multiple jet flows for angular rate sensing.•Transient simulation, lump model analysis and experimental measurement were conducted.•The device was tested using a turntable. The scale factor and cross-sensitivity were 0.26 μVs/° and 1.2%, respectively.•The effects of linear acceleration, actuating voltage on the diaphragm, heating power and position of hotwires were also investigated. In this paper, we report a further study of flow-network generating four jet flows which circulate in a sealed device to experimentally investigate the feasibility and efficiency of a dual-axis gyroscope. The experiment is carried out successfully and the experimental results reasonably agreed with those obtained by numerical analysis using OpenFOAM. The flow rectifying coefficient is determined using the mathematical lump model for a vibrating system, which takes into account of the device geometry and resonant frequency. Experimental and numerical results demonstrate that the coefficient of the new system developed in this study is significantly higher than those of conventional designs. The hotwire-integrated device which can function as a dual-axis gyroscope is tested using a turntable with speeds up to 1900 rpm. The scale factor and cross-sensitivity of the system are 0.26 μV s/° and 1.2%, respectively. The cross-sensitivity and the effects of linear acceleration, actuating voltage on the diaphragm, heating power and position of hotwires are also investigated.