Laser Interferometer Star Simulator for Optical Path Jitter Compensation
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Solution Overview
Problem
Traditional star simulators separate vibration compensation and star simulation systems, leading to complex operations and increased errors in spacecraft attitude tracking corrections.
Innovation Solution
A vibration suppression system using laser interference detection, which integrates a jitter compensating mirror and a computer control system to simultaneously perform star simulation and optical path jitter compensation, ensuring accurate feedback compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration compensation and star simulation are performed separately in traditional star simulators, then the systems can be independently optimized, but the operation process becomes complicated and errors increase
Solution Approach 1:
The patent combines the vibration compensation system and star simulation system into a single integrated system. The laser interferometer detects vibrations while the star simulator simultaneously performs star pattern projection, with both functions sharing common optical components and control mechanisms. This merging eliminates the need for separate independent operations, reducing procedural complexity while maintaining or improving accuracy through coordinated vibration compensation during star simulation.
2Measurement precision
If separate compensation and correction systems are used, then each system can be independently calibrated, but the overall error increases and calibration accuracy decreases
Solution Approach 1:
The patent implements a feedback mechanism where the laser interferometer continuously detects vibrations and feeds this information back to the vibration compensation system. The compensation system then adjusts in real-time to counteract detected vibrations during star simulation operations. This closed-loop feedback ensures that calibration accuracy is maintained by dynamically compensating for environmental disturbances, reducing overall error in attitude tracking corrections.
Solution Approach 2:
The system performs preliminary vibration detection and compensation before star pattern projection begins. The laser interferometer continuously monitors vibrations and pre-adjusts compensation parameters to prevent vibration-induced errors from affecting the calibration process. This preliminary action ensures that when star simulation occurs, the system is already optimized for accurate measurements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system improves the accuracy of spacecraft attitude tracking corrections by directly measuring external vibrations and performing targeted jitter compensation, resulting in a stable star simulated graph on the star tracker.
Implementation Method 1
the reference optical path and the detection compensating signal optical path converge at the same time on the CCD detector to constitute a vibration detection interference optical path
Implementation Method 2
the light emitted by the laser light source reaches the collimator set via the first beam splitter to emit first parallel light beams
Implementation Method 3
the light emitted by the laser light source reaches the collimator set via the first beam splitter to emit first parallel light beams which reach the mirror via the second beam splitter
Data Source
AI summary
The present invention discloses a vibration suppression system and method for a star simulation system using laser interference detection. The system includes a laser light source, a first beam splitter, a collimator set, a second beam splitter, a mirror, a detection convergent mirror assembly, a CCD detector, a computer control system, a jitter compensating mirror and a flat splitter; the optical path of the whole system includes a reference optical path and a detection compensating signal optical path. The reference optical path and the detection compensating signal optical path converge at the same time on the CCD detector to constitute a vibration detection interference optical path, and the computer control system performs feedback compensation according to the interferogram intensity change formed by the vibration detection interference optical path. Both the CCD detector and the jitter compensating mirror are connected to the computer control system. The present invention improves the accuracy of spacecraft attitude tracking correction by adding a laser light source and a second beam splitter so that both star simulation imaging and optical path jitter compensation correction can be performed.