LQG control for sensing mode of micro tunneling gyroscope

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	LQG control for sensing mode of micro tunneling gyroscope
	Liu, Yi-Fang ; Wang, Ling-Yun ; Sun, Dao-Heng ; Wu, De-Zhi ; Liu YF(刘益芳) ; Wang LY(王凌云) ; Sun DH(孙道恒) ; Wu DZ(吴德志)
刊名	http://dx.doi.org/10.3788/OPE.20122010.2214
	2012
关键词	Adaptive control systems Feedback control Gyroscopes Linearization
英文摘要	In order to maintain the tunneling gap and its fluctuation between a tunneling tip and a detecting electrode at the operation points of 1 nm and 0.1 nm respectively, a Linear Quadratic Gauss (LQG) closed-loop feedback control system was designed to reduce the system noise and to expand the bandwidth of the Micro Tunneling Gyroscope (MTG). Based on the linearization of the exponential tunneling effect using the minification method, the linearized model of the sensing mode of the MTG was deduced. By taking the Coriolis acceleration and electronic tunneling 1/f noise as the process noise and output noise of the sensing mode of the MTG, respectively, the LQG controller composed of a optimal state estimator and a Linear Quadratic (LQ) regulator was designed. The simulated system and the real LQG control circuit were established for the dynamic test. The simulation results show that the signal-to-noise ratio can be increased by 24 dB and the deviation of the tunneling gap between the two electrodes can be maintained at the value of 10-4 nm by the proposed LQG feedback controller. Furthermore, the testing curve indicates that the peak-to-peak amplitude of the tunneling current noise is 0.4 nA and the tunneling gap can be controlled to be 1 nm under the excitation of dynamic acceleration.
语种	英语
出版者	Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/92163]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Liu, Yi-Fang,Wang, Ling-Yun,Sun, Dao-Heng,et al. LQG control for sensing mode of micro tunneling gyroscope[J]. http://dx.doi.org/10.3788/OPE.20122010.2214,2012.
APA	Liu, Yi-Fang.,Wang, Ling-Yun.,Sun, Dao-Heng.,Wu, De-Zhi.,刘益芳.,...&吴德志.(2012).LQG control for sensing mode of micro tunneling gyroscope.http://dx.doi.org/10.3788/OPE.20122010.2214.
MLA	Liu, Yi-Fang,et al."LQG control for sensing mode of micro tunneling gyroscope".http://dx.doi.org/10.3788/OPE.20122010.2214 (2012).