稳定精度作为光电吊舱的关键性能指标之一，开展瞄准线稳定精度测试方法研究对于光电吊舱测试与验收具有重要意义。结合粗精组合稳定光电系统，提出一种基于时/频域分析的稳定精度测试方法。通过采集随机振动环境下惯性速率传感器和光学补偿元件的角位置信号，基于信号时域分析，得到图像漂移角速率、抖动及概率分布情况；基于信号频域分析，得到瞄准线角位置信号的功率谱密度。提出频段稳定精度贡献度，用于评估不同频段对稳定精度的影响程度；采用二级稳定效能提升度，评价二级稳定在不同频段对系统稳定性能的提升程度。该方法可以直观展示图像抖动及概率分布情况，同时给出影响瞄准线稳定精度的频率要素，对于指导机电系统设计具有重要的工程应用价值。
Abstract
The stabilization accuracy is one of the key performance indicators of electro-optical pod, and the research on the measurement of line of sight stabilization accuracy is significant for the measurement and acceptance of electro-optical pod. Combined with coarse and fine platform stabilization of electro-optical system, a measurement method of stabilization accuracy based on time/frequency domain analysis was proposed. By collecting the data of inertial angular-rate sensor and optical compensation elements under random vibration environment, the angular rate, image jitter and probability distribution of image drift were obtained based on the signal time-domain analysis. Based on the signal frequency-domain analysis, the power spectral density of line of sight angular position signal was obtained. The frequency band stabilization accuracy contribution was proposed, which could evaluate the influence degree of different frequency bands on stabilization accuracy. The efficiency improvement with two-level stabilization was used to evaluate the improvement degree of two-level stabilization in different frequency bands on system stabilization performance. This method can intuitively reveal the image jitter and probability distribution, and give the frequency factors affecting the stabilization accuracy of line of sight, which has important engineering application value for guiding the design of electromechanical system.
关键词
稳定精度 /
时域分析 /
频域分析 /
光电吊舱
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Key words
electro-optical pod /
stabilization accuracy /
time-domain analysis /
frequency-domain analysis
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参考文献
马经帅, 于洵, 刘晓宇, 等. 高精度光电跟踪系统中伺服稳定控制算法研究[J]. 应用光学,2021,42(4):597-607.
徐飞飞, 纪明, 解静, 等. FSM在高精度瞄准线稳定系统中的应用研究[J]. 应用光学,2012,33(1):9-13.
王震, 程雪岷. 快速反射镜研究现状及未来发展[J]. 应用光学,2019,40(3):373-379.
王建, 陈剑, 赵树言, 等. 基于图像灰度的光电吊舱视轴稳定精度检测方法[J]. 电光与控制,2021,28(4):102-105.
陈小军, 胡杰, 张瑜, 等. 瞄准线稳定精度试验方法研究[J]. 火力与指挥控制,2021,46(4):180-183.
徐晓睿, 曲正. 一种基于图像处理的光电平台稳定精度检测的方法: CN113237633A[P]. 2021-08-10.
严少奇. 光电稳瞄系统关键性能检测方法研究[D]. 南京: 南京理工大学, 2014.
孟令东. 光电系统稳定精度测量方法研究[D]. 哈尔滨: 哈尔滨工程大学, 2008.
杨帆. 机载光电成像跟踪系统动态稳定精度的测试方法
MA Jingshuai, YU Xun, LIU Xiaoyu, et al. Servo stabilization control algorithm in high-precision photoelectric tracking system[J]. Journal of Applied Optics,2021,42(4):597-607.
XU Feifei, JI Ming, XIE Jing, et al. Application of FSM in high accuracy line-of-sight stabilization system[J]. Journal of Applied Optics,2012,33(1):9-13.
WANG Zhen, CHENG Xuemin. Research progress and development trend of fast steering mirror[J]. Journal of Applied Optics,2019,40(3):373-379.
WANG Jian, CHEN Jian, ZHAO Shuyan, et al. A method for detecting LOS stabilization accuracy of electro-optical pod based on grayscale of image[J]. Electronics Optics & Control,2021,28(4):102-105.
CHEN Xiaojun, HU Jie, ZHANG Yu, et al. Research on test method for the stabilizing accuracy of the aiming line[J]. Fire Control & Command Control,2021,46(4):180-183.
XU Xiaorui, QU Zheng. Photoelectric platform stability precision detection method based on image processing: CN113237633A[P]. 2021-08-10.
YAN Shaoqi. Key perfo
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