A non-powered aircraft approach and landing trajectory design method

The present invention discloses a landing approach trajectory design method unpowered aircraft landing trajectory in the design of the flare, the flare is first assumed that the starting point of a known height, and derive an expression for the trajectory of each geometry parameter according to design flare landing trajectory. To design the ideal landing flare trajectory, and by the optimization algorithm to find a suitable starting point for the flare height, the landing trajectory along a trajectory deduction, so that the ground over the dynamic pressure of the dynamic pressure ground. Deep decline leveled landing trajectory and the ideal trajectory constitutes the optimal landing approach and landing trajectory. The present invention is not considered the aerodynamic forces and moments of the aircraft suffered also considered various aerodynamic control surfaces and landing gear down deflecting aerodynamic influence on the landing track design data. Landing trajectory design principles of the present invention provides a simple method of using computer software to optimize the design, improve the design efficiency.