A four-machine three-bus redundant heterogeneous gnc system
A three-bus, redundant technology, applied in the field of spacecraft control, can solve problems such as loss of fault tolerance, and achieve the effects of improving safety, simplifying cable design, and improving reliability
Active Publication Date: 2017-05-03
CHINA ACAD OF LAUNCH VEHICLE TECH
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Problems solved by technology
[0005] The existing GNC system architecture of domestic spacecraft usually adopts three-redundant backup, and adopts a two-out-of-three voting mechanism, which achieves a fault-tolerant design to a certain extent, but the architecture loses fault tolerance in the case of two failures
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[0025] The specific implementation manners of the present invention will be further introduced below in conjunction with the accompanying drawings.
[0026] The invention adopts the structure of four novel control modules and three buses to realize the safe and high-reliability operation of the spacecraft. The GNC system of the present invention is configured with three 1553B buses to complete the transmission of navigation information and control instructions, and realize the information interaction between the flight control computer, the sensor and the actuator; four redundant flight control computers are used to process the navigation information and guidance control of the whole system Issuing instructions; using dual-redundant or triple-redundant sensors to complete the information collection of the entire mission of the spacecraft; using triple-redundant actuators to complete the control instructions issued by the flight control computer.
[0027] like figure 1 As show...
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The invention relates to a four-unit three-bus redundancy heterogeneous GNC system. The four-unit three-bus redundancy heterogeneous GNC system comprises a flight control computer, a sensor, an actuator and 1553B buses. The GNC system is configured with three 1553B buses to complete the transmission of navigation information and control commands to further achieve the information exchange among the flight control computer, the sensor and the actuator. The four-unit redundancy flight control computer is used for processing navigation information and guidance control commands of the whole system. The double-redundancy or triple-redundancy sensor is used for completing the information collection of the whole task section of a spacecraft. The triple-redundancy actuator is used for completing the control commands sent by the flight control computer. The four-unit three-bus redundancy heterogeneous GNC system can meet the requirements of real time, fault tolerance and reliability of the system in the whole task cycle.
Description
technical field [0001] The invention relates to a redundant heterogeneous GNC (guidance, navigation and control) system with four machines and three buses, belonging to the technical field of spacecraft control. Background technique [0002] As the "control brain" of the spacecraft, the GNC system is responsible for the navigation, guidance and control tasks of the entire mission segment of the spacecraft. The system has to withstand the test of harsh environments such as temperature, air pressure, humidity, high radiation, and chemical pollution. Whether the control decision is reasonable is directly related to the success or failure of the flight mission, therefore, the GNC system must have high reliability. [0003] At present, there are two main ways to improve the reliability of the GNC system: one is to avoid fault design, that is, to design a "perfect" system that does not contain faults, it is actually impossible to do this absolutely; the other is fault tolerance T...
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IPC IPC(8): G05B23/02
Inventor 刘小军石庆峰欧连军赵兴张声艳郎鹏飞刘洋
Owner CHINA ACAD OF LAUNCH VEHICLE TECH