To solve the high-cost of frequent maintenance of public reference points which are widely used to build global coordinate system in the digital aircraft level adjustment recently, a novel level adjustment method for aircraft with-out public reference points was proposed. The mathematical model of horizontal coordinate system without public reference points is established, and the horizontal coordinate system is built with the moveable dual-axis inclinometer of high preci-sion and the mounting base of inclinometer. Based on the horizontal coordinate system, the horizontal posture of aircraft is calculated, and numerical control positioners are driven to move coordinately to achieve aircraft level adjustment. Then the test system for the level adjustment of aircraft is developed. Besides that, an application experiment on a certain type aircraft has been conducted in the assembly plant, which demonstrates that the level adjustment precision of test system is better than 0.4 mm, and the horizontal coordinate system can provide an accurate adjustment datum for the whole adjust-ment process. The method can complete the level adjustment process ideally, and also improve the efficiency and precision of measurement and adjustment.%针对当前飞机数字化水平调整中广泛采用公共基准点建立全局坐标系,基准点维护频繁、成本高等问题,提出一种新的无公共基准点的飞机水平调整方法.构建了无公共基准点的水平坐标系数学模型,通过高精度可移动式双轴倾角传感器及其安装底座建立水平坐标系,以此为基准,进行飞机水平姿态的解算,然后由数控定位器协同运动实现飞机水平状态的调整.构建了飞机水平调整试验系统,并在某型飞机装配现场进行了应用试验.结果表明试验系统的水平调整精度优于0.4mm,建立的水平坐标系可为整个调整过程提供准确的调整基准,该方法可有效完成飞机水平调整过程,提高了测量、调整的效率和精度.
展开▼
