针对自适应机翼飞行器设计了一种翼身连动机构,使机翼能够完成变前后掠、变翼展、变上下反角三种变形,从而在整个飞行任务过程中都能使飞行器达到气动性能最优.该连动机构以经典3-RPS并联机构为原型,通过3杆联动完成机翼姿态的变化.根据自适应机翼的变形要求,该结构对经典3-RPS机构进行改进,使机构在单一转动自由度和平动自由度的复合运动中,不会产生衍生自由度.且新结构截面外形与机翼截面的几何构型更为接近,较之经典3-RPS机构更适合应用于自适应机翼的连动机构.此外,电控系统设计也更利于系统未来优化升级.%A linkage mechanism was designed for morphing wing, making it possible for the variation of sweep,dihedral angle and wingspan. And thus the optimum aerodynamic performance can be achieved for the aircraft during the whole flight missions. Based on classic 3-RPS parallel mechanism, the design can alter the attitude of the morphing wing by tri-bar linkage. In order to meet the deformation need of morphing wing, the improvement was made for the classic 3-RPS parallel mechanism so that no derivative freedom was induced during the combined motion of single rotational freedom and translational freedom. The new mechanism fits the linkage of morphing wing better as its cross-section shape is more similar to the geometry of the airfoil section compared to the classic one. Moreover, the design of electric control system makes it possible for future optimization and upgrading.
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