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Performance in Solar Orientation Determination for Regular Pyramid Sun Sensors
Jiang Wang1, Yongchao Zhang2, Yin Zhang3
1School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China. rivers2000@163.com.
Sensors (Basel, Switzerland)
|March 27, 2019
Summary
This study introduces a novel frequency-domain method for precise solar orientation determination in spacecraft sun sensors. The new approach effectively suppresses interference, enhancing accuracy without adding size or mass.
Area of Science:
- Spacecraft instrumentation
- Attitude determination and control systems
- Optical sensing technologies
Background:
- Non-planar sun sensors utilize existing components to determine solar orientation, minimizing spacecraft size and mass.
- Current limitations in accuracy stem from insufficient performance assessments of interference suppression techniques.
Purpose of the Study:
- To develop a novel frequency-domain method for accurate solar orientation determination using regular pyramid sun sensors.
- To establish formulations for evaluating solar azimuth and elevation angle errors in this new method.
- To analyze the relationship between interference, sensor geometry, and orientation accuracy.
Main Methods:
- Development of a frequency-domain solar orientation determination method for regular pyramid sun sensors.
- Establishment of two error evaluation formulations for solar azimuth and elevation angles.
- Mathematical analysis of interference spectrum, array geometry, solar irradiance, and angle errors.
- Validation through simulations and field experiments.
Main Results:
- A new frequency-domain method for solar orientation determination was successfully developed.
- Formulations for error evaluation in solar azimuth and elevation angles were established.
- The mathematical relationship between interference sources and orientation error was elucidated for the first time.
- Internal detection system interference can be completely suppressed, and constant interference eliminated in azimuth estimation.
Conclusions:
- The proposed frequency-domain method significantly enhances solar orientation accuracy in spacecraft.
- The developed error formulations provide a robust tool for performance assessment and sensor design.
- Interference suppression capabilities are mathematically defined, improving understanding of sensor limitations and performance.
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