Rocket power fixed-point landing guidance method
A power and rocket technology, which is applied in the field of fixed-point landing of rocket power, can solve problems such as the inability to achieve fixed-point landing, few constraints, and the inability to effectively consider the impact of trajectory planning, to achieve a balance between fuel optimization and guidance robustness, and to improve convergence performance, and the effect of improving landing safety
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[0070] This embodiment provides a rocket-powered fixed-point landing guidance method, such as figure 1 As shown, the specific implementation is as follows:
[0071] The first step is to input the current state parameters, aircraft parameters and environment parameters
[0072] 1) For rocket-powered landing aircraft, calculate the feasible range of flight time according to the current aircraft position, speed, remaining fuel, and main engine specific impulse and thrust adjustment parameters, etc.
[0073]
[0074] Among them, ||v(t)|| is the current speed, m dry is the structural mass of the landing vehicle, m fuel The current remaining fuel for landing, T min , T max Adjust the upper and lower limits for the engine thrust, ρ 1 , ρ 2 It is the adjustment value of the control margin, α=1 / (I sp g 0 ), I sp is the specific impulse of the engine, g 0 is the gravitational acceleration on the surface of the landing celestial body.
[0075] 2) Determine the guidance targ...
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