System anti-impact method suitable for Mars landing task

Abstract

The invention discloses a system anti-impact method suitable for a Mars landing task. The system anti-impact method comprises relay anti-impact, balancing wing state autonomous diagnosis and processing and grounding switch state autonomous diagnosis and processing. The electromagnetic coil in the relay is continuously powered up from the time before an initiating explosive device is detonated to the time after the initiating explosive device is detonated, so that the relay works normally; the balancing wing state autonomous diagnosis and processing comprises the following steps: before the initiating explosive device is detonated, if a signal that a certain path of balancing wing is unfolded in place is effective, considering that a switch of the path is in fault, and not using the signal of the path subsequently; after the initiating explosive device is detonated, if one or more paths of balancing wing unfolding in-place signals are collected to be effective, considering that the balancing wing is unfolded in place, and otherwise, considering that the balancing wing is not unfolded; the grounding switch state autonomous diagnosis and processing comprises the following steps: before grounding, if a certain grounding switch is in a grounding state, considering that the grounding switch is in a fault state, and no longer using the signal in the subsequent process; and after grounding, judging whether grounding exists or not according to the states of the remaining grounding switches.

Description

technical field [0001] The invention relates to a system shock resistance method suitable for Mars landing mission, which belongs to the field of satellite control technology. Background technique [0002] During the landing process, the Mars rover needs to go through aerodynamic deceleration, parachuting and power deceleration. During this period, it has successively experienced the detonation process of the pyrotechnic device such as trimming the wing, the parachute, throwing the outsole, spreading the landing legs, and throwing the back cover, and the process of deploying the parachute. Reach 2200g. Each product of the GNC sub-system needs to withstand this mechanical environment, and the system's working sequence is normal and uninterrupted. The Mars landing process takes a short time (about 9 minutes), and the measurement and control time delay is long (20 minutes one way). The EDL process cannot be manually intervened on the ground, and can only be executed by the sy...

AI Technical Summary

Problems solved by technology

The Mars landing process takes a short time (about 9 minutes), and the measurement and control time delay is long (20 minutes one way). The EDL process cannot be manually intervened on the ground, and can only be executed by the system on orbit.

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