DocumentCode :
2203546
Title :
Optical axis stabilization of semi-strapdown seeker based on disturbance observer
Author :
Sun, Gao ; Zhu, Mingchao ; Yin, Shengli ; Jia, Hongguang
Author_Institution :
Changchun Inst. of Opt., Fine Mech. & Phys., Chinese Acad. of Sci., Changchun, China
fYear :
2011
fDate :
6-8 June 2011
Firstpage :
550
Lastpage :
553
Abstract :
Based on the kinematics of semi-strapdown seeker, the framework coordinate of the seeker is established. The optical axis stability equation of semi-strapdown seeker is deduced by using attitude transformation matrix. Then, the stability control principle block diagram of semi-strapdown seeker is shown based on the stability equation. The main factors that influence the stabilization precision are pointed out, such as friction disturbance, velocity-measuring noise and missile disturbance. In order to improve the stabilization precision, disturbance observer was proposed in semi-strapdown seeker stability control. The low frequency external disturbance and high frequency velocity measurement noise are effectively restrained by the disturbance observer as shown in hardware-in-loop simulation, and optical axis stabilization precision is improved nearly 20 times and 5 times due to two different frequencies with same amplitude.
Keywords :
matrix algebra; missile guidance; observers; robust control; attitude transformation matrix; disturbance observer; friction disturbance; hardware-in-loop simulation; missile disturbance; optical axis stability equation; optical axis stabilization precision; semistrapdown missile seeker; stability control; velocity-measuring noise; Adaptive optics; Missiles; Noise; Observers; Optical filters; Optical noise; Optical sensors; attitude calculate; disturbance observer; optical axis stabilization; semi-strapdown;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information and Automation (ICIA), 2011 IEEE International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4577-0268-6
Electronic_ISBN :
978-1-4577-0269-3
Type :
conf
DOI :
10.1109/ICINFA.2011.5949054
Filename :
5949054
Link To Document :
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