INVESTIGATING SPURIOUS ACTIVATIONS IN AIRCRAFT FIRE SAFETY SYSTEMS WITH CIRCUIT-MAKER NUMERICAL EQUIVALENTS

Abstract

The aviation industry is responsible for ensuring the safety of aircraft and their occupants. Fire alarm systems operate reliably to ensure flight safety. However, false alarms can pose a serious challenge, leading to unnecessary disruption and potentially compromising the effectiveness of fire protection measures. This review of the literature aims to explore the causes and consequences of false activations of the aviation fire protection system caused by short circuits in control blocks. This paper focusses on the analysis of damage to the fire suppression system of the transport aircraft. The analysis of the construction and operation of the amplifier board allowed the determination of the electrical schematic (including the identification of the values of electronic components) and the development of its numerical equivalent in the Circuit-Maker computational package (which allows the design and testing of electrical circuits, including the imaging of the course of voltages and currents in dynamic states). The results of computer simulations and verification tests were used to diagnose the SSP-FK system during the investigation of selected cases of its spontaneous tripping.