Asynchronous Fault-Tolerant Control Against Infinite Cycle Faults With Application to a Space-Borne Digital System

Area of Science:

• Control Engineering
• Computer Engineering
• Digital Systems

Background:

• Asynchronous sequential machines (ASMs) are susceptible to infinite cycle faults, leading to system oscillations.
• These faults can occur in both fundamental and non-fundamental modes, posing a significant challenge for system reliability.

Purpose of the Study:

• To develop a fault-tolerant corrective control methodology for ASMs.
• To design a state-burst feedback control scheme that ensures immunity to infinite cycle faults.

Main Methods:

• The study addresses the existence conditions and design procedures for state-burst feedback control.
• Corrective control theory is applied to achieve fault tolerance.

Main Results:

• A novel fault-tolerant control scheme is proposed for ASMs.
• The methodology effectively prevents indefinite oscillations caused by infinite cycle faults.
• Experimental validation on a space-borne digital system using FPGA circuitry demonstrates the scheme's efficacy.

Conclusions:

• The proposed fault-tolerant control methodology enhances the robustness of ASMs against infinite cycle faults.
• The state-burst feedback control scheme provides a practical solution for ensuring system stability in digital applications.