基于实测模型的围框式翼身对接位姿优化

Posture Optimization of Framed Wing-Body Docking Based on Measured Model

部件对接是飞机装配的重要内容,由于围框式翼身对接的对合面形状复杂、尺寸大、容差要求严格,仅采用位姿控制点作为对接基准会使围框式翼身对接的对合面难以准确配合。为了得到围框式翼身对接的最优目标位姿,提出了基于实测模型的翼身对接位姿优化方法。首先构建翼身对接实测模型,利用加权最小二乘算法对位姿控制点进行拟合得到机翼的初始目标位姿;然后通过分析机翼位姿约束,建立位姿优化模型,利用粒子群算法进行求解,可以获取机翼的位姿调整参数,对关键尺寸进行误差分配优化;最后以某翼身模拟件进行试验验证,分析结果满足翼身间相对位置准确度和协调准确度要求,验证了该方法的有效性。

The docking of large parts is an important part of aircraft assembly.Due to the complex shape,large size and strict tolerance requirements of the docking surface of the docking joint of the frame-type wing-body,only using the posture control points as the docking datum often makes it difficult for the frame-type wing-body docking surface to match accurately.In order to obtain the optimal target posture of the framed wing-body docking,this paper proposes an optimization method for the wing-body docking posture based on the measured model.Firstly,the measured model of wing-body docking is constructed,and the initial target posture of the wing is obtained by fitting the posture control points using the weighted least squares algorithm.Then,by analyzing the wing posture constraints,a posture optimization model is established,and the particle swarm algorithm is used to solve the problem.Finally,a certain wing-body simulation part is used for application verification.The analysis results meet the requirements of relative position accuracy and coordination accuracy between wings and bodies,which verifies the effectiveness of the proposed method.