Electrical Disturbances in Terms of Methods to Reduce False Activation of Aerial Fire Protection Systems

Abstract

The paper presents an analysis of false triggers of fire protection systems installed on aircraft. They not only cause task interruption but also have a direct impact on flight safety, forcing the crew to land in a risky area. Simulation models of electronic actuators were developed to determine the conditions under which false alarms occur. Testing of the simulation models was carried out in the computational package Matlab-Simulink and Circum-Maker for different electrical disturbance generation conditions. The simulation of overvoltage, voltage drops and voltage decays in the on-board electrical network supplying the fire protection system, occurring during the start-up of aircraft engines and during the switching on and off of on-board high-power devices, was studied. The conducted studies have practical applications since the simulation results are an important element for planning experimental tests of the SSP-FK-BI executive blocks under electrical disturbance conditions. Based on the simulation and experimental studies, the conditions causing false tripping of the fire protection system and the parameters for selected disturbance factors have been determined.

Selected Issues Associated with the Operational and Power Supply Reliability of Fire Alarm Systems

“…Active fire protection found in CI facilities is, among others, a fire alarm system and a fixed extinguishing device (FED). Satisfying this requirement means ensuring reliable FAS functioning at all fire stages and during the extinguishing operation, i.e., detecting the fire, signalling, actuation of suppression systems, and other fire-safety systems [1,110,111]. Therefore, appropriately configured and reliable FAS must be used to ensure the technical security of CI facilities.…”