基于混合优化的车载三轴光电跟踪策略

由于存在一个冗余横倾轴,三轴光电跟踪系统能够解决两轴光电跟踪系统的跟踪盲区问题,实现针对目标的全空间跟踪。针对车载三轴光电跟踪系统,在分析系统运动学特性的基础上,建立了系统的运动学模型,并提出一种基于混合优化算法的车载三轴联动全空间光电跟踪策略。通过对系统运动学模型的研究,分析三轴转动角度之间的关系,从而将三轴转角增量组合的三变量优化问题简化为求解单变量最优问题,然后应用混合优化算法得到最优的三轴角增量组合。仿真和实验结果证明,所设计的三轴跟踪策略可以得到更小的三轴转动角增量组合,能够实现车载三轴光电跟踪系统的三轴联动全空间连续跟踪运动,提高了系统的跟踪性能,具有良好的实际应用价值。

The Tracking System of Vehicular Three-Axis Photoelectric Based on Hybrid Optimization

With a redundant heeling-axis,the three-axis photoelectric tracking system can avoid the spatial blind region of the two-axis tracking system,and track the target in the whole space. By using the quaternion method,the kinematical model of the vehicular three-axis photoelectric tracking system is built based on the movement analysis of the system. Then a hybrid optimization is designed for the tracking strategy of the vehicular three-axis linkage tracking system. Through the analysis of the kinematical model,the relationship of the three axes’ angles can be obtained. Then three-variable optimization of the three axes angular increments can be simplified as the optimization of signal-variable,and the optimal angular increments are calculated by using the hybrid optimization method. The simulation and experimental results show that this tracking strategy could improve the tracking performance of system and is of great practical value,which tracks the target with smaller tracking angular increments,and the system can realize three-axis linkage continuous tracking movement in the whole space.