Category: Technical diagnostics and controllable systems


Sapozhnikov Val. V. , Sapozhnikov Vl. V. , Efanov D. V.

The paper discusses typical fault-tolerant structures based on multiple redundancy of original discrete devices with subsequent comparison of signals and error concealment. The main advantages and disadvantages of typical fault-tolerant structures are described. A fault-tolerant structure with a reduced technical implementation complexity in comparison with those already known is proposed. The complexity is reduced by eliminating redundancy with integer multiplicity and using simpler devices in the correction circuit. The correction circuit synthesis method is based on the Boolean complement of signals. The new structure is described, its advantages and disadvantages are specifi ed. The paper proposes a method for obtaining Boolean complement and signal correction functions. An example of a fault-tolerant structure synthesis for a combinational automation device is given. The experiment results using the MCNC Benchmarks system of control combinational automation devices for the synthesis of fault-tolerant structures by various methods are discussed.

Key words:
Fault-tolerant discrete devices, error correction circuits, discrete systems with fault detection, control by parity code, control by summation code, duplication, triplication, majority control principle, Boolean complement method

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