利用寻位信息的自由曲面在线测量路径规划方法

Surface online measurement planning based on acquired real state information

自由曲面的高速、高精度、扫描测量是曲面在线检测需要解决的首要问题。为此,提出一种基于寻位信息的测量路径规划方法,使得在满足精度要求的前提下,实现测点优化分布;在此基础上,将自适应控制理论应用在测头自动跟踪控制中,以便测头能够跟随曲面的变化自动调整其位置,完成自由曲面的高速、高精度、扫描测量,理论分析与仿真实验结果表明,所提出的测量方法可行,为曲面的精密测量开辟了一条新的有效途径。

The solve in rapid, precise and scanning measurement of freeform surface is the primary problem to its online inspection. Thus, a measurement planning method based on acquired real state information is proposed and simulated so as to optimize distribution of measurement points within a satisfactory toler- ance band around the CAD model. A new idea using the adaptive control theory is presented for the au- tomatic tracking controlling of measuring probe. Thus, rapid, precise and scanning measuring for large- scale surface can be accomplished. Theoretical analysis and experimental results show that the proposed method is effective, and a new approach to precise measurement of free-form surface.