Paper Info
Title
Multivariable predictive control of laser-aided powder deposition processes
Abstract
This paper derives and illustrates a multivariable predictive control scheme for laser-aided powder deposition (LAPD) processes utilizing a mobile co-axial laser and powder nozzle. First, a control-oriented multi-input-multi-output (MIMO) process model is adopted that captures the coupled nonlinear dynamics of deposited layer height and average melting pool temperature, with laser power and scanning speed as process inputs. Then, a nonlinear model predictive control (NMPC) scheme is devised in a transformed spatial coordinate system for simultaneous online control of deposition height and melting pool temperature. The conditions that ensure the closed-loop stability of the proposed control scheme are also provided. The effectiveness of the approach as well as the clear trade-offs in the multivariable control is illustrated via a case study on a single layer deposition process.
Year
DOI
Venue
2015
10.1109/ACC.2015.7171893
ACC
Keywords
Field
DocType
laser-aided powder deposition, multivariable control, nonlinear MPC
Coordinate system,Multivariable calculus,Nonlinear system,Computer science,Control theory,Model predictive control,Control engineering,Laser power scaling,Process control,Steady state,Nozzle
Conference
ISSN
ISBN
Citations 
0743-1619
978-1-4799-8685-9
2
PageRank 
References 
Authors
0.40
2
2
Name
Order
Citations
PageRank
Xiaoqing Cao1393.35
Beshah Ayalew25612.79