摘要
为了对不同型号的航空相机进行地面试验,需要设计一套具有负载自适应功能的摇摆台系统,为此研究了摇摆台负载自适应技术。根据相机的重量变化范围,结合已设计好的摇摆台机电结构,通过理论分析及仿真试验研究了负载(航空相机)大小与电位计(位置反馈器件)反馈信号幅值间的关系,结合数值计算法首次提出了一种易于实现的自动测量负载大小的新方法。对于大部分现有的数字控制系统不需要添加任何器件,只需加段程序即可使用。研究结果表明四次多项式拟合的相关系数R2为0.997 3,均方差RMS为0.171 6;五次多项式拟合的相关系数R2为0.99 96,均方差RMS为0.063 8。进一步分析认为,五次多项式拟合可满足研究的负载自适应摇摆台精度要求。
It is necessary for processing the ground tests from different types of aerial cameras to design a stewart platform with load adaptive capacity. Considering the range of cameras＇ weight and the electrical-mechanical structure of designed stewart platform, the relationship between the load （aerial camera） and the potentiometer （position feedback device） signal amplitude was studied. A measuring method for the inertia moment of the load automatically was presented using numerical calculation method. The method is simple and does not need to add any device to most digital control systems, The simulation experimental results show that R^2 is 0. 997 3, RMS is 0. 171 6 by 4th degree polynomial, while R^2 is 0. 999 6, RMS is 0. 063 78 by Sth degree polynomial. It comes out that the precision of 5th degree polynomial is coincident with the stewart platform.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2008年第8期1436-1439,共4页
Optics and Precision Engineering
基金
航空相机项目
关键词
自适应能力
摇摆台
转动惯量
自动测量
adaptive capacity
stewart platform
inertia moment
automation measurement
