A review of aircraft environmental control system simulation and diagnostics

The aircraft Environmental Control System (ECS) enables the to maintain a comfortable and safe environment for its passengers throughout operating envelope. Pressurised Air Conditioner (PACK) is heart of ECS, composed multiple sub-systems: heat exchangers, valves, compressor, turbine, water separator. PACK’s principle function enable conditioning hot, high pressure bleed air from engine or APU, temperature, humidity against cabin requirements. operation PACK governed by control system which has ability mask degradation in component during until severe failure results. required maintenance then both costly disruptive. been reported as major driver unscheduled operators. aviation industry currently proactively exploring innovative health management solutions that aid key systems based on predictive approaches using online condition monitoring techniques. This paper presents comprehensive review simulation diagnostic methodologies applicable fault diagnostics ECS PACK. existing literature suggests model-based data-driven methods are effective conducting detection isolation system. conceived findings indicate approach have extensively employed conduct at level only. Their successful implementation requires robust experimental verification validation actual data under healthy faulty conditions. Although substantial amount work developing first principles models strategies acquired suggest there compelling need verified validated model accurate system-level single scenarios. It also identified lacks evaluation regulation effect performance characteristics. Finally, taxonomy techniques compiled available literature.