امكانسنجي تبديل سامانه كنترل هيدرومكانيكي موتور توربوپراپ به سامانه كنترل الكترونيكي

Abstract This research investigates the feasibility of converting the hydro-mechanical fuel control system of the PT6A turboprop engine into a Full Authority Digital Engine Control (FADEC) system. As one of the main drivers of modern societal development, the aviation industry continuously deman‎ds improvements in propulsion efficiency an‎d operational safety. Owing to their economic an‎d performance advantages—particularly for short- an‎d medium-range missions—turboprop engines remain a preferred solution for regional aviation an‎d light transport aircraft. However, the hydro-mechanical control systems traditionally used in such engines impose limitations on the implementation of advanced control laws, comprehensive protection functions, an‎d high-fidelity performance monitoring. Adopting a feasibility-oriented approach, this thesis analyzes an‎d eva‎luates the transition from hydro-mechanical control to FADEC. The primary objective is to identify the key requirements, constraints, an‎d can‎didate architectures for the new control system, an‎d to assess the associated safety implications an‎d certification considerations in accordance with FAA an‎d EASA regulations. To this end, the main elements of a digital engine control system—including sensors, actuators, control logic, an‎d protection limiters—are examined, an‎d a dynamic engine model is derived for closed-loop assessment. In addition, engine health monitoring an‎d condition monitoring methods are introduced to enhance system reliability, maintainability, an‎d overall efficiency. The results of this study clarify the engineering decision-making pathway for FADEC development in turboprop engines an‎d contribute to strengthening the technical knowledge base for designing higher-efficiency an‎d safer turboprop propulsion an‎d control systems. Keywords: turboprop engine; FADEC; electronic engine control; hydro-mechanical control; propulsion; digital control; full-authority digital engine control.

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