Proceedings ArticleDOI
Milli-HRG inertial sensor assembly – a reality
David M. Rozelle,A. D. Meyer,A. A. Trusov,D. K. Sakaida +3 more
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TLDR
The Hemispherical Resonator Gyro (HRG) has proven itself to be an ultra-reliable technology for space application with over 30 million operation hours and 100% mission success.Abstract:
The Hemispherical Resonator Gyro (HRG) has proven itself to be an ultra-reliable technology for space application with over 30 million operation hours and 100% mission success. Northrop Grumman Advanced Navigation Systems is developing a small size and lightweight terrestrial inertial sensor assembly (ISA) based on the HRG approach. This ISA will be the core of future inertial measurement unit (IMU) and inertial navigation system (INS) product lines.read more
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Proceedings ArticleDOI
0.00016 deg/√hr Angle Random Walk (ARW) and 0.0014 deg/hr Bias Instability (BI) from a 5.2M-Q and 1-cm Precision Shell Integrating (PSI) Gyroscope
TL;DR: In this paper, a fused-silica micro Precision Shell Integrating (PSI) gyroscope has been reported with an angle random walk (ARW) of 0.00016 deg/√hr and short-term in-run bias instability of 1.0014 deg/hr without any temperature compensation.
Journal ArticleDOI
Cylindrical Fused Silica Resonators Driven by PZT Thin Film Electrodes with Q Factor Achieving 2.89 Million after Coating
Yiming Luo,Tianliang Qu,Yan Cui,Yao Pan,Menglin Yu,Hui Luo,Yonglei Jia,Zhongqi Tan,Jianping Liu,Bin Zhang +9 more
TL;DR: The application of PZT thin film electrodes to drive and detect cylindrical shell fused silica resonator can significantly improve Q factor of resonators and improve the sensitivity of Coriolis Vibratory Gyroscope (CVG).
Proceedings ArticleDOI
Hemipherical wineglass shells fabricated by a Chemical Foaming Process
TL;DR: In this paper, a Chemical Foaming Process (CFP) was used to create 3D wineglass shells with high aspect ratio and smooth and symmetric wineglass structures. But the results indicate that the method for fabricating 3D hemispherical shells of high aspect ratios may provide a basis for hemispheric shell resonators and promise micro-scale Hemispherical Resonator Gyroscope (µHRG) for the future.
Journal ArticleDOI
Trimming of Imperfect Cylindrical Fused Silica Resonators by Chemical Etching
TL;DR: This paper built up the relation between the frequency split and the balanced mass to determine the mass to be removed and found that frequency split can be reduced to lower than 0.05 Hz under rigorous theoretical calculation and optimized chemical trimming parameters.
Proceedings ArticleDOI
A new IMU with a digitally controlled PZT CVG
TL;DR: A new Inertial Measurement Unit aimed at near term, low cost, compact terrestrial navigation and space pointing applications and the need for such an IMU and current state of the art is reviewed.