Rollback-Able On-Orbit Maintenance Method for Embedded Software Based on Running Information

The effectiveness of on-orbit maintenance of onboard embedded software directly affects the correctness of satellite system operation. In order to improve the reliability and safety of on-orbit maintenance, a rollback-able on-orbit maintenance method based on running-state information was designed on the basis of existing implementation methods for onboard embedded software. The running information table of on-orbit injection block is established to describe the abnormal retrieval features of the injection block, and the association information table of on-orbit injection block is established to describe the correlation relationship between the on-orbit blocks. The content of tables is used for anomaly judgment and positioning, and the abnormal operation position and related information are quickly identified. The experimental results show that on-orbit maintenance method proposed in this paper can achieve autonomous removal of exception blocks in the event of on-orbit injection, effectively improving the effectiveness and correctness of on-orbit maintenance for onboard embedded software.