Acta Optica Sinica, Volume. 31, Issue 11, 1112006(2011)
Theoretical Research on Lock-in Error Compensation for Mechanical Dithered Ring Laser Gyro
The mechanical dither ring laser gyro (MDRLG) can achieve high accuracy. But the MDRLG must go across lock-in region twice every dither cycle, thus the information loss is inevitable. Random noise injection in the dither amplitude can only cancel the accumulation of lock-in error, but not the error itself. According to the lock-in equation, the side effect of lock-in phenomenon is interpreted in detail. Theoretical research on lock-in error compensation for MDRLG is carried out. Taking the constant acceleration approximation in lock-in region, the lock-in error representation is obtained. Numerical simulation results show that even in different input angle rates, the compensation is also very effective.
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Fan Zhenfang, Luo Hui, Lu Guangfeng, Hu Shaomin. Theoretical Research on Lock-in Error Compensation for Mechanical Dithered Ring Laser Gyro[J]. Acta Optica Sinica, 2011, 31(11): 1112006
Category: Instrumentation, Measurement and Metrology
Received: May. 16, 2011
Accepted: --
Published Online: Sep. 27, 2011
The Author Email: Zhenfang Fan (nudtfzj@126.com)