Fast and high-precision tracking technology for image-based closed-loop cascaded control system with a Risley prism...

Area of Science:

• Optics and Photonics
• Control Systems Engineering
• Image Processing

Background:

• Risley prisms offer compact design and high tracking accuracy for photoelectric applications.
• Traditional cascaded control systems face challenges in coarse-fine control input decoupling with single detectors.

Purpose of the Study:

• To develop a fast and high-precision image-based closed-loop tracking cascade control (IBCLTCR-F) system.
• To address input decoupling issues in single-detector cascaded control systems.
• To enhance target tracking performance by integrating Risley prisms and fast steering mirrors (FSM).

Main Methods:

• Proposed a cascade control input-decoupling method (CCIDM) for the IBCLTCR-F system.
• Designed image-based closed-loop tracking controllers for the Risley prism and FSM systems.
• Analyzed the stability of the integrated IBCLTCR-F system.

Main Results:

• The CCIDM method effectively decouples coarse-fine control inputs.
• The Risley prism compensates for FSM deflection angles, ensuring operation within range.
• Experimental tracking of static and moving targets demonstrated system feasibility and high precision.

Conclusions:

• The IBCLTCR-F system achieves fast and high-precision photoelectric image tracking.
• The CCIDM method is effective for single-detector cascaded control systems.
• The integrated system shows significant potential for advanced optical tracking applications.