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216results about "Cosmonautic components" patented technology

Interplanetary low-thrust transfer orbit design method based on polynomial approximation

The invention relates to an interplanetary low-thrust transfer orbit design method based on polynomial approximation. Firstly, variable initial value guess is designed, the initial value guess of the transfer orbit design is given, then, the beginning and tail end boundary conditions of a detector are calculated, next, a second type Chebyshev polynomial is adopted for fitting the transfer orbit of the detector, the performance indexes and the constrained conditions are calculated, finally, whether the feasibility conditions are met or not is judged according to the calculated thrust restriction in accordance with whether the calculated performance indexes meet the optimum conditions or not, if all requirements are met, the optimization is successful, the optimum transfer orbit is obtained, and if one requirement is not met, the initial value guess of the design variable in the first step is regulated until the optimization is successful. The method utilizes the Chebyshev polynomial for approximating the low-thrust transfer orbit shape, the time is used as the independent variable, and the flight time restriction is avoided. The polynomial factor is determined through the beginning and tail end orbit state restriction of the detector, and the method has the advantage that the fast design on the low-thrust transfer orbits in different task types can be realized according to the given beginning and tail end boundary conditions.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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