摘要
基于四象限硅光电池,双轴模拟式太阳敏感器(简称双轴模太)可实现太阳矢量两轴方向角的同时测量。硅光电池各象限光生电流的采集精度直接决定了敏感器的工作性能。然而,测试链环节中存在的不一致性误差会引起双轴模太角度测量偏差。为此,基于数值仿真,分析并建立了硅光电池各象限响应率、各象限光生电流的电压转换、信号放大、A/D转换系数及暗电流等环节偏差的影响模型,进而对各环节的综合偏差进行标定和修正,从而在保证敏感器测量精度的同时,降低对测试链环节的要求。测试结果表明,在不改变测试链性能的情况下,双轴模太的测量精度由修正前的2.05°(α轴,3σ)和1.94°(β轴,3σ)提高到0.28°(α轴,3σ)和0.26°(β轴,3σ)。
Based on 4-quadrant silicon cell, a dual-axial analog sun sensor can get the sun incident angle about two axes simultaneously. The acquisition accuracy of the four quadrant photocurrents determines the sensor performance directly. But the inconformity arisen from the test chain brings measurement deviation to the sensor. Therefore, based on numerical simulation, the influence model of the inconformity in the responsivity of each cell quadrant and then the C/V transformer, amplifier, A/D conversion and dark current for each quadrant photocurrent was established and analyzed. Then the calibration and compensation of such error sources were proposed. As a result, the requirement for the uniformity in the test chain can be lowered with the precondition of the sensor measurement accuracy. Test result shows that without changing the test chain parameters, the measuring accuracy of the sun sensor is improved from 2.05°(α-axis, 3σ) and 1.94°(β-axis, 3σ) to 0.28°(α-axis, 3σ) and 0.26°(β-axis, 3σ).
作者
徐晓丹
王建福
种荟萱
高长山
梁鹤
洪帅
吕政欣
孙艳
王春宇
XU Xiaodan;WANG Jianfu;CHONG Huixuan;GAO Changshan;LIANG He;HONG Shuai;LYU Zhengxin;SUN Yan;WANG Chunyu(Beijing Institute of Control Engineering,Beijing 100190,China;Henan Ruifa Hydropower Equipment Co.Ltd.,Nanyang 474550,China)
出处
《中国空间科学技术》
EI
CSCD
北大核心
2019年第1期19-24,31,共7页
Chinese Space Science and Technology
基金
国家自然科学基金(51405016)
关键词
四象限
太阳敏感器
测试链
不一致
修正
4-quadrant
sun sensor
test chain
inconformity
compensation
