A real-time implementation of an advanced sensor failure detection, isolation, and accommodation algorithm
John C. DeLaat, Walt Merrill · 22nd Aerospace Sciences Meeting · 1984
show that it is a practical alternative to hardware sensor redundancy.For this effort, the ADIA In recent years, advanced control algorithms algorithm has been implemented on a real-time, for turbofan engines have been implemented using microprocessor-based controls computer.9 This digital electronic control mechanisms.However, implementation was achieved using parallel prodigital electronic controls need some component cessing and a high level programming language.redundancy in order to attain sufficient reliabil-This paper describes the ADIA implementation.The ity.A sensor failure detection, isolation, and algorithm is described and the hardware and softaccommodation algorithm has been developed for ware considerations necessary to achieve the real-NASALewis Research Center which incorporates ana-time implementation are discussed along with some lytic sensor redundancy through software.This of the practical experience gained during the algorithm has been implemented in a high level process.language on a microprocessor based controls computer.Parallel processing and state-of-the-art ADIA Algorithm Description 16-bit microprocessors are used along with efficient programming practices to achieve real-time The ADIA algorithm detects, isolates, and operation, accommodates sensor failures in turbofan engine control systems.The ADIA algorithm was developed