Hot-redundancy CAN (Controller Area Network)-bus high-fault-tolerance control terminal and method based on dual DSPs (Digital Signal Processors)
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A CAN bus, control terminal technology, applied in the field of automation control, can solve the problems of imperfect fault tolerance mechanism, control failure, data loss, etc., achieve strong error correction ability and versatility, improve reliability, and achieve the effect of productization
Active Publication Date: 2013-06-12
HARBIN INST OF TECH
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[0005] The purpose of the present invention is to solve the problem that most of the control terminals in the existing distributed control system adopt cold backup, which may easily cause control failure, data loss and transmission timeout; Dual DSP hot redundant CAN bus high fault-tolerant control terminal and fault-tolerant control method
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specific Embodiment approach 1
[0036] Specific implementation mode one: the following combination figure 1 Illustrate this embodiment, the hot redundant CAN bus high fault-tolerant control terminal based on double DSP described in this embodiment, it comprises digital-analog I / O board and double redundant DSP control board,
[0037] The dual redundant DSP control board includes a master DSP1, a slave DSP2, a first CAN transceiver module 3, a second CAN transceiver module 4, a third CAN transceiver module 5 and a fourth CAN transceiver module 6,
[0038] The digital-analog I / O board includes a power supply module 7, an ADC module 8, a first RS232 communication module 9, a second RS232 communication module 10, a CPLD11, a PWM module 12 and a PWM filter self-test module 13,
[0039] Communication between master DSP1 and slave DSP2 via SPI serial bus,
[0040] The main power supply circuit and the slave power supply circuit of the power supply module 7 are redundant backup structures, and the power supply modu...
specific Embodiment approach 2
[0061] Embodiment 2: This embodiment will further describe Embodiment 1. It also includes a switch input and output module 14, and the input and output terminals of the switch input and output module 14 are connected to the input and output terminals of the CPLD11.
specific Embodiment approach 3
[0062] Embodiment 3: This embodiment further describes Embodiment 1 or 2. It also includes a PWM dimming driving module 15 , and the input end of the PWM dimming driving module 15 is connected to the output end of the PWM module 12 .
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Abstract
The invention relates to a hot-redundancy CAN (Controller Area Network)-bus high-fault-tolerance control terminal and method based on dual DSPs (Digital Signal Processors), belonging to the field of automation and control. The terminal and the method are used for solving the problems of control failure, data loss, transmission timeout and the like easily caused due to the fact that control terminals of existing distributed control systems mostly adopt cold backup and the problem that the existing fault tolerance mechanism is not perfect enough. The terminal comprises a digital-analog I / O (Input / Output) board and a dual-redundancy DSP control board, wherein the dual-redundancy DSP control board comprises a master DSP, a slave DSP, a first CAN transceiving module, a second CAN transceiving module, a third CAN transceiving module and a fourth CAN transceiving module, the digital-analog I / O board comprises a power supply module, an ADC (Analog to Digital Converter) module, a first RS232 (Recommended Standard 232) communication module, a second RS232 communication module, a CPLD (Complex Programmable Logic Device), a PWM (Pulse Width Modulation) module and a PWM filtering and self-inspection module, the master DSP and the slave DSP form redundancy, and the failure of controllers is solved by two manners comprising self inspection and mutual inspection.
Description
technical field [0001] The invention relates to a hot redundant CAN bus high fault-tolerant control terminal and a fault-tolerant control method based on dual DSPs, belonging to the field of automatic control. Background technique [0002] In large-scale chemical, petrochemical, metallurgical, electric power and other enterprises in the field of industrial automation, the control terminal in the distributed control system is very important for the safe operation of the system. When the system is in the running state, if the control terminal causes overall or partial failure due to the failure of some components, or the sampling, operation and output are incorrect due to external disturbances, it will cause very serious consequences, especially for Safety-critical fields (SCS) such as aerospace, aviation, energy and medical health. Therefore, the control terminal of the system must have a complete redundancy mechanism and strong fault tolerance, so that when the system fails...
Claims
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