Dynamics and Control for Surface Exploration of Small Bodies

Bellerose, Julie; Scheeres, Daniel J.

doi:10.2514/6.2008-6251

Cited by 28 publications

(16 citation statements)

References 11 publications

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“…The surface topographical information and gravitational field data of asteroids are the basis for establishing the mathematical model of surface motion. Bellerose et al [66] used the tri-axial ellipsoid model to discuss the descriptive method for motion on the asteroid surface and to analyze the conditions of contact between the probe and the asteroid surface. The authors investigated the impact of non-spherical gravitational force on surface motion and simulated the motion at the surface of asteroids under different collision conditions and different friction parameters.…”

Section: Near Asteroid Orbital Dynamicsmentioning

confidence: 99%

A survey on orbital dynamics and navigation of asteroid missions

Baoyin

2014

Acta Mech Sin

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Asteroid exploration is currently one of the most concerned topics among international space agencies. Orbital dynamics and navigation are obviously crucial for asteroid exploration. This paper aims to give a brief review on the dynamics, control and navigation of asteroid reconnaissance orbits, including the heliocentric transfer orbit and near asteroid orbit. The developments in optimization techniques of the transfer segment are discussed in detail. We surveyed global researches in this field and made comments on several important progresses. The final section proposed a prospective of future studies with emphasis on the key techniques of these issues in the asteroid exploration missions.

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Section: Near Asteroid Orbital Dynamicsmentioning

confidence: 99%

A survey on orbital dynamics and navigation of asteroid missions

Baoyin

2014

Acta Mech Sin

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“…A numeric method with adequate degree of sophistication would be crucial for this investigation because over-simplified models may lead to the loss of some essential properties. Bellerose et al [11] presented a general discussion on dynamics of particles on the surface of a uniformly rotating ellipsoid, in which an analytical tool for total migrating distance was developed to help designing the control laws of landing vehicles on asteroid surface. Guibout et al [12] presented a full analysis on the motion of a particle restricted on the surface of an ellipsoid, which is a general discussion of the motion properties through a wide range of parameters.…”

Section: Introductionmentioning

confidence: 99%

Routing the asteroid surface vehicle with detailed mechanics

Baoyin

2014

Acta Mech Sin

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The motion of a surface vehicle on/above an irregular object is investigated for a potential interest in the insitu explorations to asteroids of the solar system. A global valid numeric method, including detailed gravity and geomorphology, is developed to mimic the behaviors of the test particles governed by the orbital equations and surface coupling effects. A general discussion on the surface mechanical environment of a specified asteroid, 1620 Geographos, is presented to make a global evaluation of the surface vehicle's working conditions. We show the connections between the natural trajectories near the ground and differential features of the asteroid surface, which describes both the good and bad of typical terrains from the viewpoint of vehicles' dynamic performances. Monte Carlo simulations are performed to take a further look at the trajectories of particles initializing near the surface. The simulations reveal consistent conclusions with the analysis, i.e., the openfield flat ground and slightly concave basins/valleys are the best choices for the vehicles' dynamical security. The dependence of decending trajectories on the releasing height is studied as an application; the results show that the pole direction (where the centrifugal force is zero) is the most stable direction in which the shift of a natural trajectory will be well limited after landing. We present this work as an example for pre-analysis that provides guidance to engineering design of the exploration site and routing the surface vehicles.

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“…3 The dynamic equation of motion as well as the existence and stability of equilibria on the smooth surface of the ellipsoid is studied by Guibout and Scheeres (2003). The Lagrangian (Guibout and Scheeres 2003) and Jacobian integral (Bellerose and Scheeres 2008;Liu et al 2013) can be defined using the gravitational potential and the motion parameters. The linear stability of equilibria on the smooth surface of a cube can be computed by the eigenvalues of the equilibria (Liu et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Surface motion relative to the irregular celestial bodies

Jiang¹,

Zhang²,

Baoyin³

2016

Planetary and Space Science

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Abstract. We study the motion and equilibria of the grains on the surface of the irregular celestial body (hereafter called irregular bodies). Motions for the grains on the smooth and unsmooth surfaces are discussed, respectively. The linearized equations of motion relative to a surface equilibrium point and its characteristic equations are presented. Considering the stick-slip effect, the damping forces and the spring forces for the grain are calculated, then the linearized equations of motion and the characteristic equations relative to the surface equilibrium points are derived. The number of non-degenerate surface equilibria is an even number. We compute the motion of a grain released above three different regions relative to the irregular asteroid 6489 Golevka, including the flat surface, the concave region, and the convex region. Following the grain release and initial bounce, three kinds of motions exist: the orbital motion, the impact motion and the surface motion. We find that the maximum height of the next hop may be bigger than the maximum height of the current hopping. We also used Monte Carlo simulations to calculate 100 grains' hopping motions, the results shows that the stable surface equilibria are on the concave region and flat surface of the asteroid.

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Dynamics and Control for Surface Exploration of Small Bodies

Cited by 28 publications

References 11 publications

A survey on orbital dynamics and navigation of asteroid missions

A survey on orbital dynamics and navigation of asteroid missions

Routing the asteroid surface vehicle with detailed mechanics

Surface motion relative to the irregular celestial bodies

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