【摘要】 变直径倾转旋翼机作为一种新构型倾转旋翼机，通过对其飞行特性进行仿真，可根据仿真结果为设计阶段的变直径方案选择提供设计依据。本文建立了变直径倾转旋翼机飞行性能计算模型和非线性飞行动力学模型，并对样机进行仿真计算。根据参数对于飞行性能及配平结果的影响，规划算例样机的旋翼直径变化范围、变直径时机及变直径操纵策略，得到样机最佳旋翼直径变化范围为0.7R～1.15R，最佳变直径时机为：360 km/h固定翼模式前飞时完成旋翼直径增大过程，250 km/h固定翼模式前飞时完成旋翼直径减小过程。同时基于西科夫斯基变直径旋翼设计了一种变截面扭管形式的变直径旋翼操纵策略。更多还原

【Abstract】 As a new configuration tilt rotor aircraft, the variable diameter tiltrotor aircraft can provide design basis for the selection of variable diameter plan in the design stage according to the simulation results of its flight characteristics. In this paper, the flight performance calculation model and nonlinear flight dynamics model of variable diameter tiltrotor aircraft are established, and the prototype is simulated. According to the parameter influence on flight performance and trim results, the rotor diameter variation range, diameter variation timing and diameter variation control strategy of the numerical example prototype are planned.Finally, the best rotor diameter variation range of the prototype is 0.7R—1.15R. The best time to change the diameter is to complete the process of rotor diameter increase when flying forward in 360 km/h fixed wing mode, and complete the process of rotor diameter decrease when flying forward in 250 km/h fixed wing mode. At the same time, a variable cross-section twist tube type variable diameter rotor control strategy is designed based on Sikovsky variable diameter rotor.更多还原