Naoki Hiraiwa

Kyushu University | Kyudai · Department of Aeronautics and Astronautics

This study develops a novel methodology for constructing time-optimal low-thrust transfers between quasi-periodic orbits (QPOs) in the vicinity of the libration points L 1 and L 2 based on their heteroclinic connections. Initial guesses for the optimization are derived from the heteroclinic connections found in the previous work. These heteroclinic...

Geometrical trajectory design methods often utilize Poincare maps to extract characteristics of the dynamics in the planar circular restricted three-body problem. However, extending these methods to the spatial problem is challenging due to its high dimensionality. As a first step to solving this issue, this paper focuses on a three-dimensional vol...

Modern space missions with uncrewed spacecraft require robust trajectory design to connect multiple chaotic orbits by small controls. To address this issue, we propose a control scheme to design robust trajectories by leveraging a geometrical structure in chaotic zones, known as a . Our scheme shows that appropriately selected lobes reveal possible...

Modern space missions with uncrewed spacecraft require robust trajectory design to connect multiple chaotic orbits by small controls. To address this issue, we propose a novel control scheme to design robust trajectories by leveraging a geometrical structure in chaotic zones, known as lobe. Our scheme shows that appropriately selected lobes reveal...

The Gateway will be constructed as a staging point for exploring cislunar space in the Artemis program. For the maintenance of this platform, uncrewed cargo transport is planned by JAXA. To efficiently conduct cargo transport, this study proposes a novel methodology to design low-energy chaotic transfers based on lobe dynamics in the planar circula...

This paper proposes an algorithm to systematically search for a good sequence and the number of intermediate orbits in order to design the low-thrust minimum-fuel halo-to-halo transfer. The proposed algorithm applies successive convex optimization for the optimal transfer design, and initial guesses for the optimization are generated by beam search...

Trajectory design for asteroid exploration is a challenging problem owing to irregular gravitational fields of asteroids. This paper extends the center manifold method to obtain bounded orbits under these complex gravitational fields to support the preliminary design of asteroid observation missions. The center manifold method can calculate traject...

This paper constructs the framework to design low-thrust minimum-fuel trajectories for a phase-free orbit-to-orbit transfers by leveraging convex optimization and beam search. The proposed method formulates the convex optimization problem involving the departure and arrival phases as optimization parameters; it optimizes the position and velocity o...

This paper proposed the algorithm to search for the good sequence and number of intermediate orbits in order to design the optimal halo-to-halo transfer. Intermediate halo orbits that construct initial guesses are chosen from a family of halo orbits so that they are located between the initial and final halo orbits. The proposed algorithm can colle...

This paper analyzed the ballistic escaping trajectory in the Earth-Moon circular restricted three-body problem that performs ballistic escape when the gravitational perturbation of the Sun is introduced. As a preliminary study for the preparation of the analysis of ballistic escape in the four-body problem, we investigated the dynamical structure o...

This paper considers the dynamical environment of 65803 Dydimos and applies the center manifold approximation method to compute quasi-periodic orbits. Its dynamical environment is known to be complex due to the unique shapes of the primaries and the nonexistence of symmetric properties which is useful to obtain Lyapunov or halo orbits. The center m...