Design of multi-channel redundant control system based on DSP and FPGA

Abstract

Whether in the field of industrial automation or military industry, redundancy design is the most common and effective way to improve the safety and reliability of control system. Taking the factors of system stability and economy into consideration, this article uses dual-machine hot-backup system based on master-slave mode. In this article, DSP and FPGA are used as the CPU of the control system, which can communicate with the digital input board, digital output board and relay board through the backplane bus. The CPU, digital input board, output board and relay board in the control system need redundant design and in order to balance the specific working conditions and working modes, different redundancy optimization schemes are designed for different parts of the control system. The test platform is built to test the synchronization ability, fault detection ability and redundancy switching ability of the control system. The test results illustrate that the redundancy design scheme in this paper can improve the stability and reliability of the control system.