

Deep space exploration has become a new hot spot in international space activities and an important indicator of the country's comprehensive national strength and technological level. Due to the long flying distance of deep space probes, large communication delay, long interruption time, and outstanding real-time control requirements, the traditional method of relying on ground stations to upload command sequences to manage and control Earth-moon satellites can no longer meet the needs of deep space exploration missions. Autonomous management technology for deep space exploration is an effective way to solve the above problems. This project belongs to the discipline of satellite system design and application. It constructs an intelligent software and hardware platform that can conduct autonomous management on deep space probes, and breaks through the autonomous management of key flight events of deep space probes, space-earth collaborative autonomous navigation, and long-term autonomous on-orbit key technologies such as operation, autonomous fault diagnosis, isolation and recovery, and establishes a simulation and test verification system to provide technical support for the implementation of deep space exploration projects such as my country's first autonomous Mars exploration mission. The key technologies of autonomous management broken through by the project have been applied and verified in advance in the satellite, which was successfully launched on November 15, 2017, and all functional performances meet the mission requirements. This project is oriented to the first autonomous Mars exploration mission in China. Based on the common characteristics and requirements of autonomous management of deep space exploration, technical inventions and innovations have been made in the following three aspects: 1) Autonomous management technology in the key stage of deep space exploration invented high-precision integrated navigation enhancement technology of optical navigation and ground radio navigation, solving the problems of poor real-time performance of ground radio navigation and low reliability of on-board optical navigation, and the navigation accuracy can be improved from 100km to 50km. An innovative method for real-time sensing and compensation control of metamorphic center in the process of target celestial body capture is invented, which reduces the disturbance deviation caused by short-time and large-mass propellant consumption in the capture process and improves the success probability of the mission in the capture stage. Invented independent management methods independent of ground measurement and control support, such as autonomous orbit measurement and correction during solar transit period, intelligent autonomous detection during solar transit period, etc., realizing autonomous operation of detector for more than 30 days. 2) The highly integrated integrated comprehensive information processing technology for deep space exploration has invented an integrated communication system for measurement, control and data transmission under the constraint of a communication distance of 400 million kilometers, realizing autonomous switching of multiple channels and multiple frequency bands, and adaptive adjustment technology for multi-code rate, solving the problem of deep space detectors. Technical problems of highly reliable measurement and control communication between heaven and earth. A highly integrated miniaturized comprehensive electronic system has been invented to realize the integration of device service management, telemetry and remote control, thermal control management, power distribution management, propulsion control, mechanism drive, and data storage functions, laying a hardware foundation for comprehensive information management of detectors. A comprehensive information processing method on multi-system and multi-mode processors is proposed to ensure the normal execution of first-level fault tasks and the safety of second-level fault processors. 3) Deep space exploration autonomous management ground simulation verification technology Aiming at the characteristics of long-term autonomous operation management and high-sensitivity communication of deep space detectors, a deep space exploration autonomous management semi-physical simulation system has been built, and deep space detector fault simulation and injection technology, multi-degree of freedom ground simulation technology in the capture section, and a high-sensitivity electromagnetic compatibility test method of-155dBm are used to verify autonomous management functions and performance, solving autonomous management simulation verification problems under complex operating conditions. This project is highly innovative. A total of 10 invention patents have been applied for, 7 of which have been authorized; 1 software copyright has been authorized; 7 papers have been published, including 6 SCI/EI searches, and are generally at the international advanced level. This project has been successfully verified in orbit by the ldquo; Hede-1 satellite and is being used in the engineering development of the orbiter for my country's first autonomous Mars exploration mission. This project will continue to be applied to the engineering development of subsequent asteroids, Jupiter and other detectors, with extensive social and economic benefits.
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