一种带有过渡因子的下压指令设计方法

针对高超声速飞行器由滑翔段转入下压段的过程中运动状态无法快速与制导律进行匹配,从而引起弹道震荡的问题,设计了一种带有过渡因子的下压指令,改善了飞行器的过渡品质。首先,分析了高超声速飞行器平衡滑翔弹道,提出了平滑过渡的基本条件,并引入了一次函数、多项式、正弦、指数形式的过渡因子;然后,设计了3种带有过渡因子的下压指令;最后,通过仿真验证了下压指令的合理性。结果表明,该算法设计出的下压指令计算量小、制导精度高,且具有一定工程应用价值。

A Design Method for Dive Instruction with Transition Factors

The trajectory becomes unsteady from the glide phase to the dive phase because the motion state of hypersonicaircraft cannot match the guidance law quickly. So the dive instruction with transition factors was designed and then thequality of transition phase was improved. The steady glide trajectory was analyzed and then the basic condition for steadytransition was proposed. Three kinds of dive instructions with transition factors were designed on the foundation of intro.ducing transition factors included linear function, polynomial function, sine function and exponential function. Finally, thesimulation result proved the rationality of these dive instructions. The result showed that this algorithm needed little com.putation and had high guidance accuracy. Besides, it had definite value to engineering application.