Design Sensor Trajectory for Control:Appl;ication to Sheet-Forming Processes

摘要

The conventional scanning sensor generates a zig-zag pattern for the sheet-forming process,immediately leading to the problem of unequal measurement update intervals in stayte est6imation.Instead of reconstructing the profile given a zig-zag pattern,the sensor trajectory was redesigned to better estimation and control.In this work,the characteristics of the conventional scanning sensor were explored as well as the implications in estimation and control.The concept of elliptic sensor contour is presented,deriving analytical expressions for the sensor trajectories.Alternatively,the improved sensor trajectory can be obtained using a uariable-speed scanning sensor under linear sweep.That implies that control performance can be improved by reprogramming the motor of the existing se4nsor.Moreover,several alternatives for sensor arrangement are also explored.The results for estimation and control can be used as guidelines for the development of future sensor technology.