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Identification of Dynamic Characteristics of Gimbals for Line-of-Sight Stabilization Using Signal Compression Method  

Kim, Moon-Sik (부산대학교 지능기계공학과)
Yoo, Gi-Sung (포항산업과학연구원 기전자동화연구실)
Yun, Jung-Joo (현대모비스 샤시부품설계팀)
Lee, Min-Cheol (부산대학교 기계공학부, 기계기술연구원)
Publication Information
Journal of the Korean Society for Precision Engineering / v.25, no.7, 2008 , pp. 72-78 More about this Journal
Abstract
The line-of-sight(LOS) stabilization system is a precision electro-mechanical gimbals assembly for suppressing vibration due to its environment and tracking the target in a desired direction. This paper describes the design of gimbals system to reject the disturbance and to improve stabilization. The controller consists of a DSP with transducer and actuator interfaces. Unknown parameters of the gimbals are estimated by the signal compression method. The cross-correlation coefficient between the impulse response from the assumed model and the one from model of the gimbals is used to obtain the better estimation. The quasi-impulse response through linear element included in the gimbals could be obtained by the signal compression method. The unknown parameter of the linear element could be estimated as comparing the bode plots for impulse response from gimbals with them from model's response.
Keywords
Line-of-sight stabilization; Gimbals; Cross-correlation coefficient; Signal compression method;
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