An investigation on the ring thickness distribution of disk resonator gyroscope with high mechanical sensitivity. (October 2016)

• Record Type: Journal Article
• Authors: Zhou, Xin; Wu, Yulie; Xiao, Dingbang; Hou, Zhanqiang; Li, Qingsong; Yu, Dechuan; Wu, Xuezhong
• Is Part Of: International journal of mechanical sciences. Volume 117(2016)
• Page Start: 174
• Page End: 181
• Publication Date: 2016-10
• Subjects: Disk resonator gyroscope -- Ring thickness distribution -- Structure optimization -- Method of moving asymptotes -- Particle swarm optimization; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2016.08.020
• Languages: English
• ISSNs: 0020-7403

Abstract

Abstract: In this paper, we present the mechanical sensitivity improvement of a disk resonator gyroscope (DRG) by optimizing the thickness distribution of the nested rings. We calculate the mechanical sensitivity of the DRG with some given ring thickness distributions by using finite element analysis (FEA). The comparison results suggest that the ring thickness distribution has great influence on the mechanical sensitivity of the DRG. Then we introduce the bio-inspired particle swarm optimization (PSO) to study the ring thickness distribution. The globally optimized ring thickness distribution providing the maximal mechanical sensitivity is obtained and detailedly discussed. Based on this, we study how do basic structure parameters of the DRG affect the optimum ring thickness distribution. The results of this investigation can give detailed ring thickness design rules for designing series of DRGs providing the maximal mechanical sensitivity. Meanwhile, the investigation method of this paper could be expanded to include other objectives, constraints, or variables relevant to the DRG or other MEMS devices. Graphical abstract: Highlights: Ring thickness distribution greatly affect the mechanical sensitivity of DRG. Optimized ring thickness distribution is obtained by using the particle swarm optimization. Detailed ring thickness distribution design rules have been given.