Nonlinear robust control for a passive line-of-sight stabilization system

Ambrose, Hollis; Qu, Zhipeng; Johnson, Richard F.

doi:10.1109/cca.2001.973991

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…In order to obtain good adaptability for the servo system with a nonlinear property and uncertain factors, various kinds of fuzzy proportional-integralderivative (PID) control methods have been proposed for the LOS stabilization of twoaxis ISP in [9][10][11]. Considering the model uncertainties and carrier vibration or external disturbance, robust and disturbance rejection controllers are presented in [12][13][14][15][16][17]. Survey paper [18] confirms that this topic is still relevant within the engineering community and for defence technological needs.…”

Section: Introductionmentioning

confidence: 99%

Vision-Based Target Detection and Tracking for a Miniature Pan-Tilt Inertially Stabilized Platform

et al. 2021

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This paper presents a novel visual servoing sheme for a miniature pan-tilt intertially stabilized platform (ISP). A fully customized ISP can be mounted on a miniature quadcopter to achieve stationary or moving target detection and tracking. The airborne pan-tilt ISP can effectively isolate a disturbing rotational motion of the carrier, ensuring the stabilization of the optical axis of the camera in order to obtain a clear video image. Meanwhile, the ISP guarantees that the target is always on the optical axis of the camera, so as to achieve the target detection and tracking. The vision-based tracking control design adopts a cascaded control structure based on the mathematical model, which can accurately reflect the dynamic characteristics of the ISP. The inner loop of the proposed controller employs a proportional lag compensator to improve the stability of the optical axis, and the outer loop adopts the feedback linearization-based sliding mode control method to achieve the target tracking. Numerical simulations and laboratory experiments demonstrate that the proposed controller can achieve satisfactory tracking performance.

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Section: Introductionmentioning

confidence: 99%

Vision-Based Target Detection and Tracking for a Miniature Pan-Tilt Inertially Stabilized Platform

et al. 2021

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“…As a platform to achieve stable tracking and aim at the intended target, the photoelectric tracking and pointing platform is mainly composed of three parts, which are signal processing and control, a variety of photoelectric sensors, and stable tracking control (Huang et al 2005;Ambrose et al 2001). It's widely used in pods, guided weapons, and fire-control systems.…”

Section: Introductionmentioning

confidence: 99%

Research of the Photoelectric Tracking and Pointing Platform Based on the Servo Control System

Liu

Han

2019

J.Aerosp. Technol. Manag.

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To improve the speed and accuracy of the photoelectric tracking and pointing platform stable tracking, we took the three-axis photoelectric tracking platform, of which the coupling among the rings is ignored, as the research object. Considering the effects of various disturbances, the stable tracking double closed-loop servo control system was built for the azimuth, pitch, and roll rings. In the stabilization loop, output-feedback H∞ controller based on linear matrix inequality was designed to reduce the effects of model perturbations and uncertainties and to maintain the stability of the platform’s inertial space. In the tracking loop, the integral-separation proportional integral derivative (PID) controller was designed to achieve fast and accurate tracking. Smith estimated compensation was adopted to compensate the pure lag caused by video tracking. Finally, the double closed-loop servo control system was built to complete the simulation. The simulation results show that the system not only has good robustness under external disturbances, but also completes the attitude tracking quickly and accurately. Besides, the tracking error is |error| < 5∙e-4 rad, which meets the tracking accuracy requirements.

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“…A few highly complex methods for LOS stabilized control have already been proposed like Self-tuning algorithm, model reference robust control, Direct and Indirect stabilization methods, Fuzzy logic, Robust inverse dynamic control and sliding mode control and fuzzy logic controller trained by particle swarm optimization technique [3][4][5][6][7][8]. However, a majority of these algorithms are complex and difficult to be Kritika In this paper, LOS stabilization of gimbal system is done using simple compensator, PID controller and State Feedback (pole-placement) technique.…”

Section: Introductionmentioning

confidence: 99%

Comparison of different controllers for line-of-sight stabilization of a gimbal system

Bansal

Dewan

2014

2014 Students Conference on Engineering and Systems

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Nonlinear robust control for a passive line-of-sight stabilization system

Cited by 7 publications

References 3 publications

Vision-Based Target Detection and Tracking for a Miniature Pan-Tilt Inertially Stabilized Platform

Vision-Based Target Detection and Tracking for a Miniature Pan-Tilt Inertially Stabilized Platform

Research of the Photoelectric Tracking and Pointing Platform Based on the Servo Control System

Comparison of different controllers for line-of-sight stabilization of a gimbal system

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