Development of Fault Tolerant Digital System Using Triple Modular Redundancy

Abstract

Urban buildings use a large amount of electrical energy every day, especially for cooling. One common reason Fault tolerance is a critical requirement in safety-critical and high-reliability digital systems such as aerospace electronics, medical devices, industrial automation, and communication infrastructure. This project focuses on the design and development of a fault-tolerant digital system using the Triple Modular Redundancy (TMR) technique [1], [3]. In a TMR architecture, three identical modules execute the same operation in parallel, and a majority voting mechanism determines the correct output even if one module fails due to transient faults, permanent hardware failures, or radiation-induced errors [1]. The proposed system implements replication at the hardware level and incorporates a robust majority voter circuit to ensure continuous operation without performance degradation [2], [3]. The design is simulated and validated using digital design tools to analyze system behavior under fault-injection scenarios. Performance metrics such as reliability, error-masking capability, propagation delay, and resource utilization are examined to evaluate the effectiveness of the TMR approach. The results demonstrate that TMR significantly enhances system reliability and resilience by masking single-point failures, making it a practical solution for mission-critical applications where system downtime or incorrect outputs are unacceptable [1], [3]. This project provides a comprehensive understanding of fault-tolerant design strategies and highlights the trade-offs between hardware redundancy, system complexity, and operational reliability.