Compensation control strategy for photoelectric stabilized platform based on disturbance observation

Chang, Sansan; Cao, Jianzhong; Pang, Ji; Zhou, Feihang; Chen, Weining

doi:10.1016/j.ast.2024.108909

Aerospace Science and Technology

2024

DOI: 10.1016/j.ast.2024.108909

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Compensation control strategy for photoelectric stabilized platform based on disturbance observation

Sansan Chang,

Jianzhong Cao,

Ji Pang

et al.

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2024

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Cited by 2 publications

References 21 publications

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A modeling method for the opto-mechanical coupling problems of photoelectric detection and tracking systems in dynamics process

Song,

Liang,

Zhang

et al. 2024

Struct Multidisc Optim

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A modeling method for the opto-mechanical coupling problems of photoelectric detection and tracking systems in dynamics process

Song,

Liang,

Zhang

et al. 2024

Struct Multidisc Optim

View full text Add to dashboard Cite

An Extend Sliding Mode Disturbance Observer for Optical Inertial Platform Line-of–Sight Stabilized Control

Chang,

Yang,

Cao

et al. 2024

Machines

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As the imaging distance and focal length of photoelectric systems increase, the requirements for line-of–sight stabilization of optical inertial stabilized platforms (ISPs) become higher. Disturbance rejection directly determines the stability accuracy of optical inertial stabilized platforms. However, the accurate observation and suppression of wide-band and rapidly changing disturbances remains a challenge in current engineering applications. This paper proposes a robust extended sliding mode observer (ESMO) method to improve disturbance estimation performance. First, the linear extended state observer (LESO) is designed by taking the total disturbances as extended states. Then, a sliding mode observer (SMO) is incorporated in the extended states of the extended observer, forming a robust ESMO. Subsequently, the robustness and convergence characteristics of the proposed method are mathematically proved, revealing that it operates robustly without knowing the disturbance’s upper bound and offers faster dynamics and higher accuracy than the LESO. Finally, a series of simulation experimental tests are performed to demonstrate the effectiveness of the proposed method. The proposed method observes wide-band and rapidly changing disturbances utilizing the rapidly switching characteristic of the SMO and smooths the jitter of the SMO by cascading sliding mode estimation to the differentiation term of extended observation, achieving the integral effect of the reaching law. Meanwhile, this method only requires adjusting two parameters, making it suitable for engineering applications. It can be effectively used in optical inertial stabilized platform control systems for disturbance estimation and compensation.

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Compensation control strategy for photoelectric stabilized platform based on disturbance observation

Cited by 2 publications

References 21 publications

A modeling method for the opto-mechanical coupling problems of photoelectric detection and tracking systems in dynamics process

A modeling method for the opto-mechanical coupling problems of photoelectric detection and tracking systems in dynamics process

An Extend Sliding Mode Disturbance Observer for Optical Inertial Platform Line-of–Sight Stabilized Control

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