ROBUST SENSING AND CONTROL OF DIRECT METAL DEPOSITION
Direct metal deposition is one of the rapid manufacturing technologies to fabricate geometrically complicated, dense, near-net-shape components. Deposition process involves a large number of parameters, among which the laser power is considered as the primary variable. In order to develop a control system for the process, molten pool temperature during deposition was monitored by a two-color pyrometer. Laser power and molten pool temperature form a single-input single-output system, whose dynamics were identified using a linear state space model. A generalized predictive control system with input constraints was designed for controlling the direct metal deposition process. To demonstrate the use of the proposed sensor and control algorithm, closed-loop experiments were conducted to adjust the laser power in order to track molten pool temperatures to the reference values.
Lijun Song Jyoti Mazumder
Center for Laser Aided Intelligent Manufacturing, University of Michigan, Ann Arbor, MI 49109, USA
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
582-586
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）