Developing a control architecture for highly accurate multi-axis inertial stabilized platform

Thuan D. Vu; Hiep D. Nguyen; Chinh D. Hoang; Ban D. Nguyen

doi:10.1117/12.2531943

9 October 2019 Developing a control architecture for highly accurate multi-axis inertial stabilized platform

Thuan D. Vu, Hiep D. Nguyen, Chinh D. Hoang, Ban D. Nguyen

Proceedings Volume 11159, Electro-Optical and Infrared Systems: Technology and Applications XVI; 111590I (2019) https://doi.org/10.1117/12.2531943
Event: SPIE Security + Defence, 2019, Strasbourg, France

Abstract

Inertial stabilized platforms (ISP) are used in many acquisition, tracking and pointing systems, in which the line of sight (LOS) of electro-optical sensors must be kept steady. This is very challenging, especially in long range Electro- Optical/Infrared (EO/IR) systems where the LOS is more sensitive to mechanical-electrical noise, aerodynamic force or base motion effects. The efforts to improve the stability of the system includes various approaches from control algorithms, feedback/feed forward compensator to dual-stage controller or six degrees of freedom pivot, etc. n this paper, the authors present several control architectures for a multi-axis ISP system. First, the dynamic of four-axis gimbaled pedestal is modeled taking into account the effects of friction, cross-coupling and mechanical limitation. Then, the control loops for stabilization and pointing are designed using master–slave architecture for each gimbal axis. The pointing accuracy and stabilization level are analyzed and evaluated by simulation and experiment. At the end, by switching the role of each gimbal, an optimal control architecture that performs the stabilization at micro radian level in the wide range of bandwidth has been suggested. It is also proved that the proposed methods are effective for other EO/IR mobile systems that suffered various frequency of disturbance.

Citation Download Citation

Thuan D. Vu, Hiep D. Nguyen, Chinh D. Hoang, and Ban D. Nguyen "Developing a control architecture for highly accurate multi-axis inertial stabilized platform", Proc. SPIE 11159, Electro-Optical and Infrared Systems: Technology and Applications XVI, 111590I (9 October 2019); https://doi.org/10.1117/12.2531943

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