The Design and Validation of a High-Precision Angular Vibration Calibration System Based on a Laser Vibrometer

Area of Science:

• Mechanical Engineering
• Aerospace Engineering
• Metrology

Background:

• Accurate measurement of small angular vibrations is crucial for high-precision applications, particularly in spacecraft.
• Existing calibration systems may lack the necessary precision or stability for demanding aerospace requirements.

Purpose of the Study:

• To design and validate a novel high-precision angular vibration calibration system.
• To meet the stringent requirements for measuring minute angular vibrations.
• To provide technical support for precise angular vibration control in spacecraft.

Main Methods:

• Development of a system comprising a self-driving angular vibration platform and a laser vibrometer.
• Isolation of the platform from ground interference using an air-floating system.
• Finite element analysis (FEA) using ANSYS 11 for modal characteristics and spring plate stability.
• Fundamental frequency testing and measurement accuracy assessment.

Main Results:

• The system achieved a fundamental frequency of 2.69 Hz.
• The maximum measurement error was determined to be 0.00172 arcseconds.
• Validation confirmed the system's effectiveness in dynamic characteristics, stability, and measurement accuracy.

Conclusions:

• The designed angular vibration calibration system meets high-precision measurement requirements.
• The system demonstrates excellent stability and accuracy, validated through simulations and experiments.
• This research offers vital technical support for advanced angular vibration control in spacecraft applications.