A Study Of The Climb Trajectory Optimization For Reusable Launch Vehicle

Nowadays, RLV (Reusable Launch Vehicle) represents the developmental direction of aerospace delivery techique in the future,the world primary countries in aerospace are storring the techniques about RLV. To launch RLV successfully,there are some technique problems to be solved, the design and optimization of trajectory is among them, which provides important reference basis for the RLV technique feasibility, also provides the performance parameters for the integrated design, so it is very importance in the RLV design. The main works of this dissertation are focused on the trajectory design and optimization of RLV, including:The atmospheric disturbance analysis of reusable launch vehicleThe atmospheric disturbance influences the RLV in flight, the analysis will be do in this section about it.(1) The model is established. Considering the influence of atmospheric, the RLV dynamic model is deduced. And in the condition of ignoring atmospheric disturbance, the dynamic model is predigested.(2) Simulation and analyze. The magnitude and direction of velocity under influence of gust is analyzed and the variation of terminal constraints is achieved.The simulation shows that velocity, flight-path angle and height under influence of gust is obvious, it cannot be ignored.Fast-reconstruction algorithm of reusable launch vehicleThe influence of atmospheric disturbance is analyzed above, and a conception of fast-reconstruction is proposed to solve the problem, as follows:A conception of fast-reconstruction is that a new ascent trajectory can be gained by fast-reconstruction without newly trajectory optimization or design.The fast-reconstruction algorithm for RLV ascending trajectory based on advance correction and program of state value is detailed and simulated.One algorithm of fast-reconstruction is carried out successfully, but it needs the high request for the control variables, it can be improved by changing the...