研究飞机制导优化问题,由于飞行速度快,跟踪存在问题,制导精度差.传统民用飞机制导采用检索的三维跟踪,算法简单,但制导精度低,且没有对时间的精确控制,而先进制导理论具有较高的精度,但快速性低,难以实现工程应用.为了同时满足制导精确性和飞行快速性与实时跟踪的要求,提出利用模态切换的四维制导算法.以上升段为例进行实验,结果导引自动飞行模态实现了轨迹与时间的四维跟踪,改善了制导算法快速性和制导精确性.仿真结果表明,提出的制导方法可以达到较高的精度.与国内外的其它制导算法相比,复杂度低,实现简单,适合工程应用.%Classical guidance of civilian airplane were three - dimensional guidance based on flight handbook searching, it was easy but had low precision and without control of time, while advanced guidance algorithms had high precision, but were complex and short of speed, could hardly realized in real system. Since the presented algorithms can not meet the require of precision, speed and time at the same time, a four - dimension guidance based on multi - mode switching method was presented to guide auto flight modes to achiev the goal of four - dimension tracking on trajectory and time, which can reduce the complexity and improve the calculate speed. Experiment results illustrate that the proposed method can follow the optimized trajectory with high accuracy and meet the time limits. Compared with other methods, it is easily realized with lower complexity, and fits for engineering project.
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