30 results about "Periodic orbits" patented technology

The invention discloses a position selection method for observing and tracking a small body based on a Sun-Earth libration point, which belongs to the technical field of aeronautics and astronautics. The method comprises the following steps of: acquiring five dynamic libration points by a three-body system consisting of space observation spacecrafts, the Sun and the Earth; selecting a qusi-periodic orbit near the L2 point as the location point of the first space observation spacecraft; and selecting the L4 point and the L5 point as the location points of the second space observation spacecraft and the third space observation spacecraft so as to construct the observation network of the three space observation spacecrafts to observe and track the small body in combination. In comparison to the prior art, the method provided by the invention can observe and track the small body for a long period, and has the advantages of good stability, less energy consumption for keeping the positions of the spacecrafts, long observation and tracking arc segments, and so on.

The invention discloses a method for precise detection and orbit transfer of low-energy small celestial bodies under complex constraints, which belongs to the field of aerospace technology. The present invention firstly determines the multiple complex non-uniform strong coupling constraints that must be satisfied by the detection track design task, and establishes the mapping relationship between the multiple complex non-uniform strong coupling constraints and the track design parameters; establishes the dynamic equation of the detector under the centroid rotating coordinate system ; The initial value is provided by the established linearized detector dynamic equation, and the accurate quasi-periodic orbit under the ephemeris model is obtained by using the nonlinear dimensionality reduction method and the second-order differential correction; based on the accurate quasi-periodic orbit under the ephemeris model, the The initial value of the transfer orbit is obtained by optimization of the manifold perturbation method; the initial value of the transfer orbit is corrected according to a variety of complex non-uniform strong coupling constraints, and an accurate low-energy transfer orbit is obtained. The invention has the advantages of high efficiency, good convergence and less energy required for transfer.

The invention discloses a method of lorentz force multi-star formation configuration based on a quasi-periodic orbit, and belongs to the field of aerospace. According to the method of lorentz force multi-star formation configuration based on the quasi-periodic orbit, the implementation method includes the steps that motion equations of charged slave stars under an artificial magnetic field of a host star are established, the motion equations are subjected to dimensionless simplification treatment, an equilibrium point of the dimensionless motion equations is determined, periodic orbits near the equilibrium point are obtained by using a differential correction method and a numerical continuation method, the quasi-periodic orbit on the central manifolds of the periodic orbits is calculated,and by deploying a plurality of charged satellites on invariant curves under stroboscopic mapping of the quasi-periodic orbit, lorentz force multi-star formation configuration without working medium consumption is realized. According to the method of lorentz force multi-star formation configuration based on the quasi-periodic orbit, chemical fuel is not required to be consumed, chemical pollutionis avoided, and application prospects are achieved in close distance space formation, in-orbit operation and long time space observation tasks. The method of lorentz force multi-star formation configuration based on the quasi-periodic orbitis is suitable for the charged satellites to conduct close distance formation around a spacecraft with a self-spinned magnetic field on an earth high orbit.