A Control Method based on Smith Estimator Applied in Closed-loop I-FOG
With the rapid development of I-FOG,high precision I-FOG is becoming an urgent demand in strategic submarine,navigation and armed vehicles.This paper focuses on the closed-loop control method design.A direct way to improve the precision of I-FOG is to increase the length of fiber.However,the enhanced Sagnac effect brings a longer transition period.If the demodulation frequency of I-FOG is at base frequency,it will cause longer sampling period,narrow bandwidth and small dynamic range.Especially in high dynamic environment,closed-loop feedback can not compensate high frequency noise effectively and increases the dynamic error.An enhanced control method with Smith estimator is presented to solve these critical defects.With the help of Smith estimator,the delay caused by odd times frequency modulation is figured out.Further,the dynamic performance and noise-restrain capability are highly improved.
Smith estimator I-FOG Closed-loop control
Li Xingshan Yuan Huizheng Gao Huiwen Shao Zhihao Lu Junqing Wang Yong
The General Design Department of Hubei Aerospace Technology Academy, Wuhan 430040, China Group State-OWNED Hongfeng Machinery Factory, Xiaogan 432000, China
国际会议
the 25th Chinese Control and Decision Conference(第25届中国控制与决策会议)
贵阳
英文
178-181
2013-05-01（万方平台首次上网日期，不代表论文的发表时间）