Research on feasibility of missile attitude control based on laser gyroscope
CHENG Yao-qiang1, XU De-min1,2, WAN Yan-hui3, LIU Ming-yong1
1.School of Marine Engineering, Northwestern Polytechnical University, Xi’an 710072,China;2.National Key Laboratory for Underwater Information Process & Control, Northwestern Polytechnical University, Xi’an 710072,China;3.The 16th Institute, Chinese Aerospace Science and Technology Corporation,Xi’an 710100,China
Abstract:
According to the disadvantages of traditional mechanical gyro inertial measurement unit(‘IMU’) for steering system not being available for missile attitude control, a concept based on laser gyro IMU is proposed to realize navigation & positioning and attitude control. The concept will save three single-axis rate gyros compared with traditional missile attitude control system, and is available both for strapdown and platform inertial navigation systems. Firstly, this article analyzes the selection requirements of sensitive device for missile attitude control system, and then analyzes the feasibility of missile attitude control based on laser gyro theoretically, on this basis, from four aspects of error characteristics, anti-vibration characteristics, temperature characteristics and dynamic characteristics, validate the feasibility of the concept practically. Secondly according to the strict requirements of dynamic characteristics on attitude control system, a special design is made for gyro signal filtering used for attitude control. By changing the traditional high order FIR filter to adaptive filter and low order FIR filter, laser gyro’s signal phase delay is reduced. The delay time of theoretical design is 1.5 ms. Lastly, this design is validated through an angle vibration test, and test curve indicates that the dynamic characteristics of laser gyro completely meets the requirements of the attitude control system, and the maximum delay time is 1.6144 ms, which satisfies with the attitude update rate of 2 ms per frame. This concept can simplify the missile guidance system design, at the same time, it does not reduce missile guidance accuracy, and also provides reference for the broadening of the application of laser gyro.
Key words: laser gyro attitude control dynamic characteristics adaptive filtering
DOI:10.11916/j.issn.1005-9113.2012.04.019
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Research on feasibility of missile attitude control based on laser gyroscope
本站小编 哈尔滨工业大学/2019-10-23
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