Method for modifying on-orbit product software on satellite without influencing normal operation

Abstract

The invention provides a method for modifying on-orbit product software on a satellite without influencing normal operation. The method comprises the following steps: (1), obtaining first injection code information which comprises a new product function execution code and an injection region head address, and extracting the new product function execution code from the first injection code information and storing the new product function execution code into an injection region; and (2) obtaining second injection code information including a jump function execution code jumping to the head address of the injection region and the head address of the storage region where the to-be-modified code is located, extracting a jump function execution code; storing the to-be-modified code in a storagearea where the to-be-modified code is located; replacing the to-be-modified code in the program running in the on-board product with the skip function execution code, when the skip function executioncode enables the program pointer to run to the to-be-modified code, skipping to the head address of the injection area, calling a new product function execution code, and executing the new product function execution code. According to the invention, the safety of product on-orbit operation and the product maintainability are greatly improved.

Description

technical field [0001] The invention relates to a method for on-orbit modification of on-satellite product software without affecting normal operation. The on-satellite product software is modified under the condition of stable attitude control of the on-orbit satellite and belongs to the technical field of satellite on-orbit maintenance and control. Background technique [0002] At present, most of the on-board products use high-performance processors and large-capacity modifiable program memory. The technical status of the whole machine is new, and the development technology is extremely difficult. At the same time, the software code is large in scale and not mature enough, and the ground assessment intensity and development time are limited. , in order to avoid the risk of long-term operation in orbit, there is a strong demand for single-machine on-orbit program modification and maintenance. [0003] During the satellite's in-orbit operation, business continuity and attit...

AI Technical Summary

Problems solved by technology

[0004] (1) Only on-orbit modification of system controller products (such as star mission computer, control computer) and star sensor stand-alone software is carried out, rarely involving actuators (executors need to keep working in orbit, if the software is modified and maintained , generally needs to exit the normal working state, which may affect the stable operation of the satellite. In addition, the software and hardware design of the single-machine system of the actuator is generally solidified in the PROM, which cannot be modified and maintained on-orbit, and only parameter modification can be performed;

[0005] (2) Generally, when performing on-orbit modification of the software of stand-alone products such as star sensors, it is necessary to set other stand-alone devices to take over to determine the attitude (for example, multiple star sensors, set other star sensors to determine the attitude by command) or Attitude control, the modified product exits the working mode, and only the modification and maintenance of the on-orbit program is performed, which affects the normal control

If the on-board product software cannot be modified on-orbit, and the verification on the ground is not sufficient or in place, it is very likely that there will be common software problems, which will affect the success or failure of the mission.

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