Optimization of Control Laws for Performance Maintenance of Turboshaft Engines

In order to address the issue of engine performance degradation resulting from component deterioration during the operational lifespan of turboshaft engines, this paper conducts an in-depth study on the analysis of turboshaft engine performance degradation and the optimization of performance maintenance control strategies. Firstly, utilizing the component-level model of the turboshaft engine, the study investigates the impact of various online controllable parameters, including the adjustable guide vane angle of the compressor, the gas generator speed, and the power turbine speed, on the overall engine performance. Subsequently, an optimized control strategy for the combination of these online controllable parameters is devised. The primary objective of this strategy is to ensure that the total temperature at the power turbine inlet remains within safe limits, that the gas generator speed and power turbine speed do not exceed their respective maximum rpm values, while simultaneously maintaining the engine's output power. The effectiveness of this control strategy is rigorously verified through simulation. The simulation results demonstrate that the optimized control strategy is capable of effectively sustaining the turboshaft engine's output power during emergency conditions, resulting in a remarkable extension of engine life by 111.4%.