液晶与显示, 2014, 29 (5): 721, 网络出版: 2014-08-18  

舰载光电伺服设备的系统辨识研究

Shipboard photoelectric equipment servo system identification
作者单位
长春工业大学 电气与电子工程学院,吉林 长春 130012
摘要
系统辩识即获取电机机械时间常数Tm和对应的固有放大倍数K。舰载光电系统由于受到横摇、纵摇、艏摇的扰动,其系统辩识的可信度及精度直接影响到调节器参数的设定,从而对稳态和动态精度会有很大的影响。常规公式法求电机机械时间常数在实际应用中非常不便,并且大多数场合不能求得Tm。本文以PC104硬件平台为依托,推导出的近似逼近e指数函数作为阶跃法获取系统辨识的理论依据,并设计了友好的人机交互界面可以方便的显示、修改系统辩识的结果。试验分析表明,应用Origin拟合e指数函数使阶跃法得到的Tm和K拟合可信度达到96%以上,其拟合误差小于01,精度完全满足使用要求。解决了实际工程中获取Tm和K精度低、可信度不高的难题。此方法成功地应用在项目中,并对求得电机机械时间常数有很好的通用性和借鉴性。
Abstract
Obtaining the motor mechanical time constant Tm and inherent magnification K is knowed as system identify. Ship-borne photoelectric system was disturbed due to the roll, pitch, bow wave disturbance,and the reliability and accuracy of the system discerniblile directly affect the regulator parameter setting.Thereby, the steady state and dynamic accuracy will confront serious influence. Conventional formula method for motor mechanical time constant in the practical application is very inconvenient, and most of the occasions for Tm can’t be gotten. Based on PC104 hardware platform, this paper deduced the approximate approach e exponential function as step method for system identification that is the theoretical basis, designed a friendly human-computer interaction interface to display and modify the result of the system on discerniblile easily. By test analysis: applying Origin fitting e exponential function can make the step method of Tm and K fitting credibility more than 96%, the fitting error is less than 01, accuracy can meet the needs completely. The problem of low accuracy and credibility has been solved for getting Tm and K in the practical engineering.This method is successfully used in some projects, and the results show that the method is feasible and practical.

周俊鹏, 李焱, 王一卉, 陈娟. 舰载光电伺服设备的系统辨识研究[J]. 液晶与显示, 2014, 29(5): 721. ZHOU Junpeng, LI Yan, WANG Yihui, CHEN Jun. Shipboard photoelectric equipment servo system identification[J]. Chinese Journal of Liquid Crystals and Displays, 2014, 29(5): 721.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!