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Spaceborne Triple-mode Redundant System Based on Clock Synchronization Technology

A three-mode redundancy, clock synchronization technology, applied in the direction of instruments, electrical digital data processing, digital data processing components, etc., can solve the problems of low synchronization accuracy, high software requirements, a large number of resources, etc., to achieve high versatility, Overcome the effect of large power consumption and improve synchronization accuracy

Active Publication Date: 2015-10-21
ZHEJIANG UNIV
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Problems solved by technology

[0005] At present, mission synchronization technology is mostly used in spaceborne triple-mode redundant systems at home and abroad. Compared with clock synchronization technology, its disadvantages are: (1) The synchronization accuracy is relatively low
The synchronization level is function-level synchronization, while clock synchronization can reach instruction-level synchronization; (2) Poor versatility
Task synchronization can only adapt to the triple-mode redundant system under specified functional requirements; (3) It has high requirements for software and takes up a lot of software resources

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  • Spaceborne Triple-mode Redundant System Based on Clock Synchronization Technology
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  • Spaceborne Triple-mode Redundant System Based on Clock Synchronization Technology

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the implementation and the accompanying drawings.

[0032] figure 1 It is a schematic diagram of an on-board three-mode redundant system of the present invention, including: a three-mode isomorphic microprocessor module, a clock synchronization module, a redundancy judgment module, a mode management module, and an interface expansion module. The three-mode isomorphic microprocessor module is connected with the clock synchronization module and the mode management module; the clock synchronization module is connected with the redundant judgment module and the mode management module; the redundant judgment module is connected with the interface expansion module and the mode management module.

[0033] Each module of the on-board three-mode redundant system is realized by FPGA.

[0034] The three-mode isomorphic microprocessor module is composed of three isomorphic low-power DSPs. Its exter...

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Abstract

The invention discloses a satellite-borne triple modular redundancy system. The satellite-borne triple modular redundancy system comprises a triple modular isomorphism processor module, a clock synchronization module, a redundancy judging module and a model managing module; and a core technology is a clock synchronization technology. The clock synchronization module can be divided into a synchronous loading starting unit and a high-precision clock alignment module; the operation state of microprocessors is monitored through a multistage counting unit realized by an FPGA (Field Programmable Gate Array) to obtain a non-synchronous offset; and an input frequency and keeping time of the triple modular isomorphism processor module are adjusted so that the three microprocessors are at a synchronous operation state. The system is mainly applied to a pico-satellite satellite-borne computer system; the synchronous precision can reach a 10 nanosecond magnitude order; the universality is strong; and the reliability of the satellite-borne computer system can be effectively improved.

Description

technical field [0001] The invention relates to a triple-mode redundant system, in particular to a satellite-borne triple-mode redundant system based on clock synchronization technology. Background technique [0002] Pico-satellites refer to micro-satellites with a weight ranging from 1 to 10Kg. Compared with ordinary satellites, pico-satellites more widely use MNT (Micro-Nano Technology, micro-nano technology) and MEMS (Micro Electronic Mechanical System, micro-electromechanical system), etc. High-tech, high functional density, short development cycle, low cost, small size and light weight. [0003] When a spacecraft flies in space, it is always in the radiation environment of charged particles. In such a radiation environment, microprocessors may be interrupted or even lost in function due to single event disturbances, resulting in catastrophic consequences. This serious problem is mainly caused by the total radiation dose effect and the single event effect. The single e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/00G06F1/16
Inventor 童杰文王慧泉金仲和王婵汪宏浩
Owner ZHEJIANG UNIV
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