Dual-computer redundancy control method and control device thereof

Abstract

The invention discloses a dual-computer redundancy control method and a control device thereof. The control device is characterized by comprising a control unit A and a control unit B which are of the same structure, wherein each control unit comprises a switch latching circuit, a DSP microprocessor and an output blocking circuit, the input interlocking signal ends and the output interlocking signal ends of the switch latching circuits of the two control units are respectively crosswise connected, and the outputs of the two control units are connected in parallel to an actuating mechanism. The method comprises the following steps: after being electrified, the control unit A and the control unit B compete for conduction, the first started control unit is the main controller, and the other control unit is the backup controller; and when failure occurs, the interlocking signal outputs of the main controller and the backup controller are mutually converted, and the states of the main controller and the backup controller are switched. By connecting the two control units with the same structure with the actuating mechanism in parallel with one operative and other hot standby, the invention switches the main controller and the backup controller when failure occurs, thereby realizing the dual-computer redundancy control mode.

Description

technical field [0001] The invention relates to an automatic control method and device, in particular to a dual-machine redundant control method and a control device thereof, which are applicable to various automatic control systems with redundant configurations. Background technique [0002] In the field of industrial automation, in order to improve the reliability of the system, the core units in some systems usually adopt the redundant configuration mode of working and standby hot backup, which is also called hot standby redundant configuration. In the hot standby redundant configuration, both units are set in the running state, and one of the units is set in the working state, and the other is set in the standby state. When the working unit fails, the system enters the switching of working / standby state, switches the failed unit in working state to standby state, and switches the other unit in standby state to working state, thus ensuring the whole system Normal operati...

AI Technical Summary

Problems solved by technology

However, in the redundant control mode configured with this structure, once the components in the hot standby processing unit fail, instead of the controlled object (main control unit), the switch cannot be completed, and the main control unit in the working state After not receiving the control signal from the hot standby processing unit, it will not be able to work normally, resulting in the paralysis of the entire system, so the real hot standby redundant configuration mode has not been achieved

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