光电系统捕获跟踪控制方法研究与仿真  

Photoelectric Tracking Capture System Control Method Research and Simulation

作　　者：刘鑫[1,2] 乔彦峰[1] 林兆华[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《计算机仿真》2012年第12期266-269,353,共5页Computer Simulation

基　　金：国家863高技术研究发展计划资助项目(2010AA8080202)

摘　　要：研究光电系统电视捕获的准确跟踪问题。光电系统在跟踪阶段,一旦物体的运动速度较快,方向突变性较强,会造成光电系统中的控制出现超调和振荡,系统性能差。传统算法在对快速运动目标进行捕获时,由于系统的超调和振荡,导致目标在捕获阶段逸出跟踪视场,造成跟踪不准确。针对上述问题,提出了一种采用α-β-γ滤波器的捕获跟踪控制算法。根据目标的运动特性和运动状态建立捕获跟踪模型,通过α-β-γ滤波器预测目标下一时刻位置和速度,采用复合控制进行随动跟踪,降低系统的超调量和缩短过渡时间,从而实现对快速运动目标的捕获跟踪。实验结果表明,运用该控制算法可以有效地解决目标在电视捕获阶段逸出视场的问题,提高系统对快速运动目标的捕获跟踪能力和跟踪精度。Research the problem of TV acquisition and tracking for optoelectronic system. TV auto - tracking for optoelectronic system is divided into two stages, the acquisition stage and the tracking stage. Due to the overshoot and the oscillation, when take the conventional control algorithm to acquire fast moving targets, it is easy to cause the problem that target loss on the acquisition stage of TV auto - tracking. To solve this problem, this paper presented an acquisition and tracking control algorithm based on α-β-γ filter. Through α-β-γ filter predict the target＇s position and velocity at the next time based on the acquisition model established by the target motion state and motion characteristics, the combined control was adopted to acquire the target, thus acquisition and tracking to the fast motion targets were realized. The results show that the proposed control algorithm can effectively solve the problem that target loss on the TV acquisition stage, improve acquisition and tracking ability and tracking precision for fast motion objects.

关 键 词：光电系统 滤波算法 捕获跟踪 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构] V556.5[自动化与计算机技术—计算机科学与技术]