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A system and method for maintaining and correcting time of a real-time clock of a satellite-borne computer

A technology of on-board computer and real-time clock, applied in hardware monitoring and other directions, can solve the problem that accuracy and reliability cannot be fully guaranteed, and achieve the effect of saving CPU time for participating in timing and control, improving efficiency and flexible operation.

Active Publication Date: 2017-05-10
NO 771 INST OF NO 9 RES INST CHINA AEROSPACE SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

Using software to realize this function requires a certain amount of resources to maintain the operation of the clock itself, and there are fewer commands provided to the ground, and the accuracy and reliability cannot be fully guaranteed.

Method used

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  • A system and method for maintaining and correcting time of a real-time clock of a satellite-borne computer
  • A system and method for maintaining and correcting time of a real-time clock of a satellite-borne computer
  • A system and method for maintaining and correcting time of a real-time clock of a satellite-borne computer

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0041] see Figure 1 to Figure 9, the maintenance and timing system of the satellite-borne computer real-time clock of the present invention, comprise all being connected with processor, and mutually independent ground timing module, centralized timing module, uniform timing module and GPS timing module, and as clock source Crystal oscillator;

[0042] The ground timing module includes a processor interface module for realizing communication between the ground timing module and different processors, a timing control module for generating ground timing enable signals, a register module for storing planned input time values, and a user The counting module is used to complete the cumulative carry of nanoseconds, microseconds and seconds; the processor interface module is connected to the timing control module and the register module respectively, and the timing control ...

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Abstract

The invention discloses a maintenance and timing system and method for a satellite-borne computer real-time clock. A hardware mode is adopted to realize ground time service and centralized timing of satellite time, so that errors of the ground time service and the satellite time are reduced, and the efficiency of a software program and the reliability of the satellite time are improved. According to the maintenance and timing system and method, a ground time service module of a hardware structure and a centralized timing module of a hardware structure are adopted, so that the time for a CPU to participate in timekeeping and control is saved, delay of software timekeeping is shortened, CPU resources are effectively released, and the utilization rate of the CPU of the whole system is increased; meanwhile, with respect to functions, the method is more flexible compared with an original design method, and operation of a satellite application program is more convenient and flexible; satellite time management can be achieved efficiently and accurately, high-reliability and automatic centralized timing is realized, and therefore the system and method have far-reaching significance in development of the satellite centralized timing management technology.

Description

technical field [0001] The invention belongs to the technical field of time management systems, and relates to a clock maintenance and timing system, in particular to a maintenance and timing system and method for a real-time clock of an on-board computer. Background technique [0002] With the rapid development of the computer field, the computer has stricter requirements for precise time requirements. Especially in the satellite system, it is very necessary to keep the time synchronization and time accuracy of the computer. my country's large satellites and small satellites continue to use the traditional clock management mechanism, which is usually realized by software. The time is corrected through ground timing commands, and the on-board processor maintains the time. Using software to realize this function needs to occupy certain resources to maintain the operation of the clock itself, and there are fewer commands provided to the ground, and the accuracy and reliabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/34
Inventor 何小青李阳行建康杨涛李超宿美佳
Owner NO 771 INST OF NO 9 RES INST CHINA AEROSPACE SCI & TECH
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