航天器多次再入气动巡航变轨

The Spacecraft Multiple Reentry Orbital Transfer with Aerocruise

对航天器多次再入地球大气气动巡航控制方案进行了研究,通过分析高层大气密度的变化特性,结合气动辅助变轨的优化控制策略,引入多次再入大气变轨技术和气动巡航技术,运用高斯伪谱法优化气动巡航推力控制策略,从而实现航天器大范围倾角机动。仿真结果表明,多次再入大气航天器气动巡航技术可以在实现大范围倾角机动的同时,相对于纯推力变轨还能节省大量燃料,并且相对于单次以及多次的轨道再入,多次再入气动巡航技术不仅降低了航天器表面热流密度的峰值,在轨道倾角机动能力上也有提高。

In this paper,the optimization control of multiple reentry spacecraft with aerocruise was studied.The changing characteristics of the upper atmosphere density were analyzed.Combining with the optimization control strat egy of aeroassist orbital transfer,introducing multiple reentry technology and aerocruise technology,and using Gauss ian pseudospectral method to optimize the aerocruise control strategy,the large-scale inclination change of space craft was realized.Simulation results show that multiple reentry spacecraft with aerocruise not only can achieve large-scale inclination change,but also saves a lot of fuel compared to thrust orbital transfer.Compared with single entry technology and multiple reentry technology,multiple reentry spacecraft with aerocruise can reduce the peak heat rate of spacecraft and improve the inclination change.