Effects of mechanical non-linearity on the dynamic behaviour of ring-based inertial rate sensors

Popov, Atanas A.; Napoli, Violetta Di; McWilliam, Stewart

Abstract

© 2019 Violetta Di Napoli, et al. This paper presents a mathematical model to describe the 2 in-plane response of supported ring-based MEMS Coriolis Vibrating Gyroscopes (CVGs), including mechanical non-linearity in ring and support structures. Whilst it is well-known that the drive mode resonance frequency of unsupported rings depends on drive amplitude, the proposed model investigates the effects of support geometrical non-linearity on the dynamic behaviour of the 2 modes. Results indicate that the non-linear stiffness of the supports, combined with the ring non-linearity, breaks the rotational symmetry of the resonator when 8 supports are used, leading to a reduction in sensor gain. In contrast the symmetry of the resonator and performance are maintained when 16 supports are used. The proposed model also demonstrates how the mechanical support non-linearity can be used to guide the design of resonators having a linear drive mode frequency backbone curve.

Citation

Popov, A. A., Napoli, V. D., & McWilliam, S. (2019, September). Effects of mechanical non-linearity on the dynamic behaviour of ring-based inertial rate sensors. Presented at 41st International Conference on Vibroengineering, Leipzig, Germany

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 41st International Conference on Vibroengineering
• Start Date: Sep 30, 2019
• End Date: Oct 1, 2019
• Acceptance Date: Aug 28, 2019
• Online Publication Date: Sep 30, 2019
• Publication Date: Sep 1, 2019
• Deposit Date: Dec 12, 2019
• Publicly Available Date: Dec 12, 2019
• Journal: Vibroengineering Procedia
• Print ISSN: 2345-0533
• Electronic ISSN: 2538-8479
• Publisher: JVE International
• Peer Reviewed: Peer Reviewed
• Volume: 27
• Pages: 109-114
• DOI: https://doi.org/10.21595/vp.2019.20957
• Public URL: https://nottingham-repository.worktribe.com/output/3540533
• Publisher URL: https://www.jvejournals.com/article/20957
• Additional Information: Oral presentation at 41st International JVE Conference in Leipzig, Germany, 30 September - 1 October 2019.