The Flight Automatic Control Research Institute

Fengcheng, China

The Flight Automatic Control Research Institute

Fengcheng, China
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Zhao X.-N.,The Flight Automatic Control Research Institute | Han Z.-H.,The Flight Automatic Control Research Institute | Guo X.,The Flight Automatic Control Research Institute | Chen L.-F.,The Flight Automatic Control Research Institute | And 2 more authors.
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2015

Theoretical analysis is made on the vibration performances of mechanically dithered RLG, which shows that the sensitive axis of gyro system under horizontal vibration have elliptical coning effect. Then the expression of equivalent gyro bias produced by the coning motion is derived. The random vibration analysis of mechanically dithered RLG is performed by the finite element software ANSYS, which proves the existence of coning motion effect. Furthermore, the existence of coning motion effect and the magnitude of coning motion argument are proved by physical tests. Numerical calculation shows that the coning motion effect seriously influences the RLG vibration performance, and the method to improve the vibration performance by increasing cross flexural rigidity is put forward, which is useful to improve the anti-vibration design of mechanically dithered RLG. Test results of the improved design show that, by increasing cross flexural rigidity, the vibration result is improved by four times. ©, 2015, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.

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