CAJ | 학술논문

针对临近空间飞行器再入飞行受到热流率、动压和过载等多约束情况下的轨迹优化问题,提出了基于OPTIMUS优化软件平台搜索初值的编程求解方案。首先根据再入飞行动力学原理建立数学模型,并合理简化,应用最优控制理论设计滚转角控制律;然后利用OPTIMUS软件平台搭建系统工作流程,进行试验设计并建立响应面模型,通过平台集成的优化算法寻找初值;最后结合不同优化算法的优点,基于遗传算法加模式搜索法编写程序求解轨迹。结果表明,基于OPTIMUS分析所设计的轨迹优化方案,可以快速确定较为准确的初值,计算效率显著提高,且能够保证较高精度。
침대림근공간비행기재입비행수도열류솔、동압화과재등다약속정황하적궤적우화문제,제출료기우OPTIMUS우화연건평태수색초치적편정구해방안。수선근거재입비행동역학원리건립수학모형,병합리간화,응용최우공제이론설계곤전각공제률;연후이용OPTIMUS연건평태탑건계통공작류정,진행시험설계병건립향응면모형,통과평태집성적우화산법심조초치;최후결합불동우화산법적우점,기우유전산법가모식수색법편사정서구해궤적。결과표명,기우OPTIMUS분석소설계적궤적우화방안,가이쾌속학정교위준학적초치,계산효솔현저제고,차능구보증교고정도。
A trajectory optimization method with heating rate,dynamic pressure and load constraints is proposed for near space vehicle based on the OPTIMUS optimization software platform.The dynamic model of entry flight is given and reasonably simplified.The optimal bank angle control law is designed then.The system working flow,design of experiment（DOE） and response surface model（RSM） are built up on OPTIMUS platform.The initial guess is obtained using the optimal algorithms on the platform.With benefits of local and global algorithms,a program combining genetic algorithm and pattern search method is developed to optimize trajectory.The simulation results show that the proposed trajectory optimization method based on OPTIMUS can find accurate initial guess rapidly and improve computation efficiency with high precision.