目标运动闭环跟踪模拟系统

提出了一种基于激光技术的、易于工程实现的目标运动模拟方法及实验装置,并进行了实验验证。利用激光的高亮度、发散角小以及激光器体积小、质量轻等特点,设计了针对小目标运动的实验模拟装置。通过多轴复合技术以及空间投影技术,实现了角运动向小目标二维空间运动的转换;运用多媒体定时器技术实现了对电机的内部闭环控制;采用脉冲宽度调制(PWM)技术实现了对电机的速度控制,提高了目标的仿真精度。小目标的运动速度可以达到10°/s,精度<0.1°/s,归一化标准偏差0.09。利用该装置实现了实验室内的目标运动闭环跟踪实验研究,目标捕获跟踪系统的跟踪标准偏差为0.2 mrad。该系统可以作为目标捕获跟踪系统对二维运动目标的闭环实验研究的验证仿真平台。

Simulated Close-Loop Target Tracking System

One target motion simulation method and experimental system were presented. The simulation system was constructed with the advantages of laser, such as high brightness, small divergency, small spot size. The transform from angle motion to two-dimensional (2D) space motion of small target was made with the technique of complex multi-axis and space projection. The inner close-loop control of motor was achieved by multimedia timer. The rolling speed was controlled with the technique of pulse width modulation (PWM). With these technique, the simulation precision was advanced. The moving velocity of simulation target was up to 10°/s. It′s precision was about less than 0.1°/s . The normalized standard deviation was 0.09. The system was small and easy to accomplish in engineering. It can be used as the simulation platform to verify the target acquiring, tracking system for a moving target within 2D space. The tracking standard deviation of the tracking system was 0.2 mrad.