Accurate tracking control in LOM application

Yadong Liu, Congxin Li, Xingui Guo, and Decai WangNational Die & Mould CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China

摘 要：<正> The fabrication of accurate prototype from CAD model directly in short time depends on the accurate tracking control and reference trajectory planning in （Laminated Object Manufacture） LOM application. An improvement on contour accuracy is acquired by the introduction of a tracking controller and a trajectory generation policy. A model of the X-Y positioning system of LOM machine is developed as the design basis of tracking controller. The ZPETC （Zero Phase Error Tracking Controller） is used to eliminate single axis following error, thus reduce the contour error. The simulation is developed on a Maltab model based on a retrofitted LOM machine and the satisfied result is acquired.

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