An integrated trajectory optimization method for strong coupling and multi-constraints vehicle is presented. Based on thecharacteristics of strong coupling and multi-constraints, considering the change rate of angle of attack and safety marginof scramjet as additional constraint conditions and taking the minimum coupling degree as optimization index, thereference trajectory is adopted, which uses a smoothing method for solving multi-constraint s optimal problems. Thereference trajectory can avoid the scramjet being in unsafe working condition to a certain extent, and also can greatlyimprove the accuracy of reference trajectory tracking. Based on the precise simulation model, the simulation analysis iscarried out. The simulation results show that the method is effective and reliable.
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