DocumentCode :
646011
Title :
Modeling and predictive control of nonlinear hybrid systems using disaggregation of variables - A convex formulation
Author :
Nandola, Naresh N. ; Puttannaiah, Karan
Author_Institution :
Corp. Res. Center, ABB, Bangalore, India
fYear :
2013
fDate :
17-19 July 2013
Firstpage :
2681
Lastpage :
2686
Abstract :
The current work is motivated by the need of achieving global solution and better computational efficiency for control of any arbitrary nonlinear hybrid dynamical systems (NHDS). In this work, we present a novel modeling and corresponding model predictive control (MPC) formulation for NHDS. The proposed modeling approach relies on disaggregation of polynomials of binary variables that appear in the multiple partially linearized (MPL) model. In particular, we use auxiliary continuous variables and linear constraints to model these polynomials and represent the MPL model in a linear fashion. Subsequently, disaggregation of the variables based multiple models are used to formulate the MPC law for NHDS. The MPC formulation takes similar form as multiple mixed logical dynamical (MMLD) model based MPC and yields a convex MIQP optimization problem. Moreover, the proposed modeling approach results in a compact model than the corresponding MMLD model as it refrains from adding any extra binary variables. Therefore, offers certain computational advantage when used for the predictive control of NHDS. The efficacy of the proposed solution is demonstrated on a three-tank benchmark hybrid system.
Keywords :
convex programming; integer programming; linear programming; linearisation techniques; nonlinear dynamical systems; polynomials; predictive control; quadratic programming; MMLD model; MPL model; NHDS; auxiliary continuous variable; binary variable polynomial disaggregation; convex MIQP optimization problem; linear constraint; model predictive control; modeling approach; multiple mixed logical dynamical; multiple partially linearization; nonlinear hybrid dynamical system; Computational efficiency; Computational modeling; Mathematical model; Optimization; Polynomials; Predictive control; Predictive models;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Control Conference (ECC), 2013 European
Conference_Location :
Zurich
Type :
conf
Filename :
6669208
Link To Document :
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