SUN Qian, LIU Jian-ye, LI Rong-bing. Modeling and simulation of closed-loop detection system of MEMS gyroscope based on ∑-Δ modulator[J]. 2009, 28(1): 36-39.
SUN Qian, LIU Jian-ye, LI Rong-bing. Modeling and simulation of closed-loop detection system of MEMS gyroscope based on ∑-Δ modulator[J]. 2009, 28(1): 36-39. DOI: 10.13873/j.1000-97872009.01.005.
The basic principle of force balance closed-loop detection of MEMS gyroscope is discussed.A ∑-Δ modulator is used in the closed-loop detection
and a hybrid feedback network is designed based on ∑-Δ modulator
PI controller and speed feedback.The model of closed-loop detection system of the MEMS gyroscope is constructed and simulations are carried out.The result shows that the circuit noise of the proposed closed-loop model has decreased by 67.7% and the bias stability is improved by 3 times compared with opened-loop detection.The simulations validate the hybrid closed-loop detection scheme.