The set of the orbital angular-momentum reversal,or H-reversal,sailcraft trajectory was born as a type of unconventional precursor interstellar mission trajectory by using highperformance solar sails.Starting from an ...The set of the orbital angular-momentum reversal,or H-reversal,sailcraft trajectory was born as a type of unconventional precursor interstellar mission trajectory by using highperformance solar sails.Starting from an outline of the H-reversal sail trajectory,this paper mainly focuses on the 2D reversal-mode solution to the general solar-photon sail motion equations.The feasible region for H-reversal trajectories in fixed sail attitude angles is illustrated.Some interesting applications of the H-reversal trajectory are presented in detail to show its advantages.As a special case,a precursor interstellar probe can be delivered with a constant sail orientation in the H-reversal trajectory to be compared with the direct-motion sail flyby of the Sun.Of importance are the heliocentric periodic orbits in double H-reversal modes,obtained via both fixed and time-varying sail attitude angles.Two more applications involving H-reversal trajectories are discussed in terms of asteroid deflection and transfer trajectory to rectilinear orbits.Finally,some items of the mathematics behind the 3D motion-reversal trajectories are summarized.展开更多
Dear authors and readers,Since the beginning of the space age,the return of samples from the other celestial bodies has been deemed one of the ultimate forms of unmanned robotic missions.Realizing a sample return miss...Dear authors and readers,Since the beginning of the space age,the return of samples from the other celestial bodies has been deemed one of the ultimate forms of unmanned robotic missions.Realizing a sample return mission requires profound knowledge of many wide and different areas of engineering and science.In a special way,astrodynamics plays a crucial role throughout the mission,ranging from accurate guidance and navigation to distant bodies,to precise modeling of dynamical environment of target bodies,precision landing to an aimed point,various surface and proximity activities around the bodies,and orbit design for the round-trip journey.展开更多
Since the 1960s,an increasing interest in space propulsion methods(a)not-high-limited in energy(e.g.,electric rocket propulsion)and(b)involving no propellant(space sailing),has been advancing from theoretical,numerica...Since the 1960s,an increasing interest in space propulsion methods(a)not-high-limited in energy(e.g.,electric rocket propulsion)and(b)involving no propellant(space sailing),has been advancing from theoretical,numericalsimulation,and technological viewpoints.In particular,among the propulsion concepts of type(b),solar-photon sailing(SPS)has received greater and greater attention.展开更多
基金the National Natural Science Foundation of China(No.11602019)the Young Elite Scientist Sponsorship Program by CAST(2016QNRC001)The Excellent Young Teachers Program of Beijing Institute of Technology(2015YG0605)is acknowledged as well.Autho。
文摘The set of the orbital angular-momentum reversal,or H-reversal,sailcraft trajectory was born as a type of unconventional precursor interstellar mission trajectory by using highperformance solar sails.Starting from an outline of the H-reversal sail trajectory,this paper mainly focuses on the 2D reversal-mode solution to the general solar-photon sail motion equations.The feasible region for H-reversal trajectories in fixed sail attitude angles is illustrated.Some interesting applications of the H-reversal trajectory are presented in detail to show its advantages.As a special case,a precursor interstellar probe can be delivered with a constant sail orientation in the H-reversal trajectory to be compared with the direct-motion sail flyby of the Sun.Of importance are the heliocentric periodic orbits in double H-reversal modes,obtained via both fixed and time-varying sail attitude angles.Two more applications involving H-reversal trajectories are discussed in terms of asteroid deflection and transfer trajectory to rectilinear orbits.Finally,some items of the mathematics behind the 3D motion-reversal trajectories are summarized.
文摘Dear authors and readers,Since the beginning of the space age,the return of samples from the other celestial bodies has been deemed one of the ultimate forms of unmanned robotic missions.Realizing a sample return mission requires profound knowledge of many wide and different areas of engineering and science.In a special way,astrodynamics plays a crucial role throughout the mission,ranging from accurate guidance and navigation to distant bodies,to precise modeling of dynamical environment of target bodies,precision landing to an aimed point,various surface and proximity activities around the bodies,and orbit design for the round-trip journey.
文摘Since the 1960s,an increasing interest in space propulsion methods(a)not-high-limited in energy(e.g.,electric rocket propulsion)and(b)involving no propellant(space sailing),has been advancing from theoretical,numericalsimulation,and technological viewpoints.In particular,among the propulsion concepts of type(b),solar-photon sailing(SPS)has received greater and greater attention.
