复合式高速无人直升机飞行力学建模及操纵策略研究

Flight dynamics and manipulation strategy of compound high speed helicopter

双螺旋桨复合式高速无人直升机同时具备了直升机和固定翼飞机的优势,是目前高速飞行器的研究热门之一。针对双螺旋桨复合式高速无人直升机进行了飞行力学相关分析和操纵策略研究。首先,以干扰因子的方式构建旋翼对机翼的气动干扰模型,机身模型采用风洞实验数据,然后,建立该直升机的非线性飞行动力学模型。针对操纵冗余问题,提出一种操纵策略,以权重系数来分配操纵通道,通过添加平均螺距杆纵向通道,由螺旋桨平均螺距控制前飞速度。在此基础上进行配平,实现了各个杆操纵量在3个模式间的光滑过渡,从而验证了操纵策略的合理性。

Double-propeller compound high-speed unmanned helicopter,which is currently one of the hottest research topics in high-speed aircraft,has the advantages of both helicopter and fixed wing aircraft.In this paper,the flight-dynamics related analysis and manipulation strategy research of the double-propeller compound high-speed unmanned helicopter are carried out.The aerodynamic interference model of rotor to wing is constructed by using the interference factor,and the fuselage model is based on the wind tunnel test data.Then,the nonlinear flight dynamics model of double-propeller compound high-speed unmanned helicopter is presented.In view of the problem of control redundancy,a manipulation strategy is proposed,which allocates the control channel with the weight coefficient,and controls the forward flight speed by the longitudinal channel of the mean propeller pitch.On this basis,the smooth transition of each rod between the three modes is realized,which verifies the rationality of the control strategy.