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Towards terrain interaction prediction for bioinspired planetary exploration rovers.

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    Future planetary exploration may use walking rovers on deformable terrain. This study models terrain interaction using granular material physics, enabling simplified mathematical representations for improved thrust generation and control.

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    Area of Science:

    • Planetary Science and Engineering
    • Robotics and Autonomous Systems
    • Granular Mechanics

    Background:

    • Future planetary exploration missions aim to utilize legged vehicles for extended reach.
    • Limited understanding exists regarding the behavior of walking rovers on deformable planetary terrain.
    • Planetary terrain presents complex interactions due to its granular nature.

    Purpose of the Study:

    • To develop and validate a combined model for terrain interaction of walking rovers.
    • To understand the physics and micro-mechanics of granular materials relevant to rover mobility.
    • To simplify complex terrain interactions into a manageable mathematical representation.

    Main Methods:

    • Application of granular material study principles.
    • Detailed characterization of the sinkage process.
    • Development of bespoke testing and analysis tools for terrain interaction.

    Main Results:

    • A validated combined model of terrain interaction for walking rovers was proposed.
    • Unexpected conclusions regarding sinkage and interaction dynamics were revealed.
    • A simplified mathematical model was derived from complex granular interactions.

    Conclusions:

    • The developed model provides insights into walking rover behavior on deformable terrain.
    • Simplified mathematical representation is achievable without numerical methods.
    • Findings suggest avenues for intelligent control and optimized foot geometry for enhanced thrust generation.