Title :
Explicit Moving Horizon Estimation in dc-dc converters
Author :
Gaulocher, Sebastian ; Papafotiou, Georgios
Author_Institution :
ABB Corp. Res., Baden - Daettwil, Switzerland
Abstract :
This paper concerns the application of modern computational control tools in a special class of power electronic circuits, namely switch-mode dc-dc converters. Specifically, we aim at developing a disturbance estimation scheme that can be used in addition to recently developed explicit MPC control schemes in order to achieve offset-free output voltage reference tracking in the presence of unknown output load variations. The method presented uses a Moving Horizon Estimation scheme for the disturbance estimation and the underlying optimization problem is solved using multi-parametric programming for the whole range of values of the measurement vector, resulting in an explicitly defined piecewise affine estimation function. Simulation results provide a comparative assessment in terms of performance and implementation complexity of the solutions derived for different lengths of the moving estimation horizon as opposed to a steady state Kalman filter.
Keywords :
DC-DC power convertors; estimation theory; optimisation; power electronics; predictive control; MPC control scheme; computational control tool; disturbance estimation scheme; explicit moving horizon estimation; measurement vector; model predictive control; multiparametric programming; offset-free output voltage reference tracking; optimization problem; piecewise affine estimation function; power electronic circuit; steady state Kalman filter; switch-mode DC-DC converter; Complexity theory; DC-DC power converters; Estimation; Kalman filters; Optimization; Vectors; Voltage control;
Conference_Titel :
Control Conference (ECC), 2009 European
Conference_Location :
Budapest
Print_ISBN :
978-3-9524173-9-3