Abstract
The hardware redundancy technology is to reduce the basic reliability in exchange for the high reliability and safety of the system, but the failure rate of the system will increase with the increase of the hardware redundancy. Aiming at the disadvantages of hardware redundancy, the article takes the angle of attack(AOA) as the object, and constructs the analytical value of AOA based on the analytical relationship between the sensors of the flight control system; Introduce an equalization algorithm to eliminate the drift error between redundant signals, further proposes a hybrid redundancy voting algorithm based on hardware redundancy and analysis redundancy. The algorithm calculates the weight of the sensor signal based on the difference between the sensor signal and the analytical value, so that the voting value is closer to the true value, thereby improving the safety of the system. At the end of the article, the feasibility of the voting algorithm is verified by simulation; the analytical study of the AOA proves the effectiveness of the hybrid redundancy design scheme and the voting algorithm.
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