A method of using a redundant dual MCU hot backup control system

Abstract

The present invention relates to the field of embedded control systems for power supply control, in particular to a method for using a redundant dual-MCU hot backup control system, comprising the following steps: two MCUs actively preempt the specified memory address ROM1 of the dual-port RAM, and preempt the successful MCU As the main MCU, another MCU is used as a backup MCU, occupying another specified memory address ROM2 of the dual-port RAM; the main MCU occupies the bus of the communication module through the CPLD, obtains control instructions, and executes the state machine program; the backup MCU executes the state machine Program; the main MCU judges according to the execution state machine result data obtained from the backup MCU updated to ROM2; whether the number of inconsistencies is greater than the predetermined threshold, if it is greater than, it will mark the MCU as faulty, and notify the CPLD to control the MCU to switch; if it is less than, return to step 2; the main MCU Output power control signal through CPLD. The use method of the redundant dual MCU hot backup control system of the present invention can effectively improve the reliability of the power control system and meet the power control requirements of complex electromagnetic environments.

Description

technical field [0001] The invention relates to the field of embedded control systems for power supply control, in particular to a method for using a redundant dual MCU hot backup control system. Background technique [0002] Embedded control systems are widely used in various fields such as industrial communications, aerospace, automobile manufacturing, medical treatment, and mobile terminals. They are the core systems for control, monitoring, management, and decision-making. [0003] In power control and management applications, embedded control systems are often in harsh environments, such as high temperature, high voltage, high frequency, strong electromagnetic interference, etc. Power is the cornerstone of system work, and the robustness of its control management system is particularly important. The strong electromagnetic interference from the power supply itself is the main reason for the failure of its control system. [0004] Usually, the power management uses an e...

AI Technical Summary

Problems solved by technology

The response time of the MCU watchdog reset is about 50ms, and the embedded control system is in a non-responsive state during this period; if the code fails, the entire system control will fail

The redundant dual MCUs that are mainly used in flight control systems, such as the failure of the main MCU, can quickly switch between the main MCU and the hot redundant MCU, reaching about 10ms, but if the main and backup MCUs run exactly the same program, the main and backup MCUs are required Two-way synchronous waiting for multiple synchronization points is required, and inconsistent data is analyzed or recalculated. The real-time control is based on high-performance MCU and large-capacity dual-port RAM. The embedded system of power control The use of small-sized, low-performance MCUs, a large number of judgments, calculations, and synchronous operations will reduce the real-time performance of power system control and protection. At the same time, redundant dual MCUs also have the risk of MCU code failures leading to control system failures.

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