Design of the Fault_tolerant Controller Based on FPGA in the Dual Fault-tolerant System

According to various methods in common use of dual fault-tolerant system and combined with a developing devices,a scheme of the dual fault_tolerant controller is proposed based on FPGA .As the core module of the fault_tolerant controller,the arbitrator mechanism is in charge of achieving the switches between the host and the backup machine. Watchdog is designed in FPGA for inpecting heartbeat of sofeware and hardware . And also high eliminating the output signals' burrs by using FPGA's inner clock signal. The simulational result achieves the command of dual fault-tolerant system and good performance.