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Architecture and method for N-fold redundancy control system

A redundant control and power control technology, which is applied in general control systems, control/regulation systems, program control, etc., can solve the problems of automatic switching and low safety level of redundant control systems, and achieve the effect of improving safety performance

Active Publication Date: 2021-10-08
杭州智仝科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the shortcomings in the prior art that self-diagnosis cannot be performed, and when an MCU fails, synchronous switching cannot be performed well; when an MCU fails, automatic switching cannot be performed; and the redundant control system has a low safety level, and provides Architecture and method of an N-fold redundant control system

Method used

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  • Architecture and method for N-fold redundancy control system
  • Architecture and method for N-fold redundancy control system
  • Architecture and method for N-fold redundancy control system

Examples

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Effect test

Embodiment 1

[0049] Architecture of N-fold redundant control system, including power control module, power control module includes power management module, MCU processing module and electrical isolation module; power management module provides power to MCU processing module, MCU processing module and electrical isolation module through CAN bus connection; it is characterized in that there are at least 3 groups of power control modules, and any 2 groups of MCU processing modules are connected to each other through a synchronous bus. There are at least three groups of power control modules, which can improve the safety performance of the control system, and the probability of dangerous failure per hour is less than 10 -9 .

[0050] The MCU processing module includes a safety check module, and the safety check module sends a safety status signal to the electrical isolation module. The status of the MCU processing module is checked in real time through the security check module.

[0051] The...

Embodiment 2

[0055] Based on the architecture of the N-fold redundant control system in Embodiment 1, the method for realizing the N-fold redundant control system includes,

[0056] Initialize, power on the system, and perform MCU diagnosis after power on;

[0057] MCU diagnosis, check the MCU online diagnosis status, if the status is good, monitor the CAN bus, otherwise the system will recover after the failure;

[0058] Monitor the CAN bus, and judge whether there is an Active MCU working normally by monitoring the CAN bus. If so, continue to monitor the CAN bus, otherwise enter the broadcast application message;

[0059] Broadcast the application message, broadcast the application message on the CAN bus, and monitor whether the application message is received from other MCUs, if yes, enter the passive state, and perform MCU diagnosis, otherwise enter the MCU state to determine;

[0060] The MCU status is determined, the calculation results are periodically sent through the CAN bus, and...

Embodiment 3

[0075] On the basis of the above-mentioned embodiments, the power management module of the N-fold redundant control system has multiple power input terminals based on diodes; the nMR of the power management module is a software reset application, and nRESET is a hardware reset application, both of which are related to nMR and nRESET of the MCU are connected; nActiveCAN in the MCU module is connected to the CAN bus request, and nERROR is the MCU system failure event; the ENABLE pin is active high, and the electrical isolator is connected to the MCU and CAN when nERROR is invalid and the nActiveCAN request is valid. bus.

[0076] The process of the system reset circuit includes whether the power-on system reset application is received, and if so, set the pin nRESET of the MCU power management module to an active low level, that is, Active nRESETpin (low voltage), otherwise it is judged that it is enough for the MCU system Fault, such as pin nERROR low level, if yes, set MCU powe...

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Abstract

The invention relates to an electric power control system technology, and discloses an architecture and method of an N-fold me redundancy control system. The architecture comprises power control modules; each power control module comprises a power supply management module, an MCU processing module and an electrical isolation module, wherein the power management module provides power for the MCU processing module, and the MCU processing module is connected with the electrical isolation module through a CAN bus; the number of the power control modules is at least three, and any two sets of MCU processing modules are connected through a synchronous bus; each MCU processing module adopts a double-lock-step processor design and has a self-diagnosis function; each MCU processing module comprises a safety check module, and the safety check module sends a safety state signal to the corresponding electrical isolation module; through the redundancy design architecture of the control system, the safety coefficient is high, and the probability of dangerous faults per hour is smaller than 10 <-9 >; and the designed control system can be used in traffic vehicles, industrial automation, aircrafts, or other controllers requiring high reliability and safety.

Description

technical field [0001] The invention relates to power control system technology, in particular to the architecture and method of an N-fold redundant control system. Background technique [0002] The safety level of the control system of the current technology cannot well meet the ASIL-D specification described in the international standard ISO26262 or the DAL-A specification in the aviation industry standard DO-254, especially in the power control system. [0003] For example, patent name: patent application number: CN201210294539.3; patent application date: 2012-08-17, the patent application records that the anti-irradiation three-mode redundant circuit structure copies both the combinational logic circuit and the sequential logic circuit of the circuit For three copies, a voter is added after the three sequential logic circuits, so that each path of the circuit becomes three copies. In addition, a voter is added to each path, hoping to eliminate single event faults in eac...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0421G05B2219/24182Y02P80/10
Inventor 汤曦东
Owner 杭州智仝科技有限公司
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