A Dynamic Compensation Method Based on Pulse Width for Laser Ranging and Distance Determination in Precision-Guided...

Area of Science:

• Aerospace Engineering
• Optical Metrology
• Guidance Systems

Background:

• Miniaturization and high-precision are critical for initiation devices in precision-guided aircraft.
• Existing laser ranging units require improved measurement accuracy for reliable fixed-distance initiation decisions.
• Laser echo characteristics, specifically echo pulse width variations, impact ranging precision.

Purpose of the Study:

• To develop a dynamic compensation method for laser ranging based on pulse width.
• To enhance the measurement accuracy of laser ranging units in initiation device systems.
• To ensure the accuracy and reliability of fixed-distance initiation decisions in guided aircraft.

Main Methods:

• Analysis of laser echo characteristics to understand pulse width variations.
• Establishing a negative correlation between pulse width and detection distance in the mid-range.
• Implementing a dual-correction approach combining a static lookup table with dynamic compensation.
• Developing a system for calibration and correction based on pulse width-to-distance deviation mapping.

Main Results:

• A dynamic compensation method was proposed and implemented.
• The method establishes a mapping relationship between pulse width and distance deviation for correction.
• Testing verified the feasibility, achieving a small relative error between calculated and actual distances.
• The average relative error was found to be approximately 1.33%.

Conclusions:

• The proposed dynamic compensation method effectively improves laser ranging accuracy.
• This technique provides crucial technical support for developing miniaturized and intelligent initiation devices.
• The dual-correction approach ensures reliable distance measurements for precision-guided applications.