| 摘要 |
PROBLEM TO BE SOLVED: To avoid a collision without a judgment on the ground and a communication line with the ground by providing a relative distance measuring device for supplying relative distance information, and determining a thruster injection quantity in reference to a table for the collision avoiding thruster injection quantity according to a preliminarily prepared relative distance. SOLUTION: A distance measuring device 5 measures the relative distanceρwith a target 2, and inputs the value to a collision avoiding injection quantity determining device 6, which then determines the collision avoiding injection quantityΔv according to a preliminarily prepared distance. This value is inputted to a thruster driving device 8 through a switch 7 opened and closed by the presence/absence of abnormality, or ON/OFF signal outputted from an abnormality detector 4 to drive a thruster 9 so that a spacecraft 1 is separated from the target 2 only for a designated time. Thus, the collision avoidance can be executed on board without a judgment on the ground or a judgment by a person.
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