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A trust verification strategy for autonomous control system in launch site


Aeronautics and Aerospace Open Access Journal
Litian Xiao, Mengyuan Li, Kewen Hou, Fei Wang, and Yuliang Li

Abstract

The control system at the launch site has gradually started providing unattended autonomous control during the flight mission. The autonomous control system is very important to autonomous control for ground facilities and equipment in space launch. Even if the autonomous control system has been tested, there is still no very effective method to ensure the trusted operation of the autonomous system. We propose a strategy for the trusted operation and verification of autonomous control system. Based on the state transition model of the control system, the trust verification of autonomous control system ensures the trusted operation of autonomous control. This verification is set up in the intelligent support system of the host computer, which makes lightweight for verification calculation in the control system. Trust verification strategy is the trusted stamp and the verification protocol. The state transferring of each module inside each controller is stamped by the stamping module embedded in PLC. The control output set includes the state stamps and is sent to the intelligent support system. The control verification module of the intelligent support system verifies the correction of autonomous control. The trusted state transferring is used to ensure the credibility of the autonomous operation. The paper analyzes the strategy’s security under environmental impact as well as independent and joint attack. The strategy is applied to a prototype system. It illustrates the feasibility of the strategy at launch site.

Keywords

launch site, autonomous control system, trust verification, trusted stamp, verification protocol

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