Optimal periodic control of hypersonic cruise vehicle

Object of this work is hypersonic cruise vehicle which cruises at Mach number beyond 5 in atmosphere. Range of this vehicle is often restricted by the poor aerodynamic, propulsive and structural performances and severe persistent aerodynamic heating. To extend its range, optimal periodic cruise trajectory has been adopted herein to improve fuel efficiency and remit heat accumulation. The performance measure is a weighted combination of the two factors. The simulations show that the two factors are mutually contradicted with variation of weighting factor, and that improvement of aerodynamic heating is much more distinct than that of fuel efficiency. The study on single period is helpful to design the whole flight envelop in future research.