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This study assesses the influence of engine dynamic characteristics on helicopter handling quality during hover and low-speed forward flight. First, we construct the helicopter–engine coupling model (HECM) based on the power-matching relationship between the engine and the rotor. The impact of the engine is evaluated by comparing HECM with a helicopter model without the engine. To assess the engine’s influence quantitatively, we consider torque response, height response, and collective–yaw coupling characteristics in ADS-33E-PRF handling quality criteria. The results reveal that the engine power output lag can deteriorate the helicopter’s torque and height response handling quality rate (HQR). After the increase in helicopter mass, the torque HQR caused by engine influence improved, and the altitude HQR further deteriorated. The engine dynamic characteristics can also reverse the yaw rate, decreasing collective–yaw coupling HQR. As the helicopter’s flight speed increased, the engine’s impact on the yaw rate increased by 41.8%. This study can provide valuable insight into the effects of engine dynamic characteristics on helicopter handling quality and offer a reference for the design of helicopter–engine coupling control laws.

V212.4; 分析了发动机动态特性对直升机在悬停和低速前飞状态下飞行品质的影响.基于发动机与直升机之间的功率匹配关系,建立直升机/发动机耦合模型.使用ADS-33E-PRF飞行品质规范中的扭矩响应、高度响应与总距偏航耦合特性指标,定量评估发动机动态特性的影响.结果表明:发动机输出滞后导致直升机扭矩与总距偏航耦合操纵品质下降,同时会对直升机高度响应产生负面影响.随着前飞速度增加,发动机对扭矩响应特性与总距偏航耦合效应的影响进一步加剧,但对高度响应的不利影响得到缓解.该研究可以为直升机/发动机耦合控制律设计提供参考依据.