Robust variable horizon MPC with move blocking

This paper introduces a new formulation of variable horizon model predictive control (VH-MPC) that utilises move blocking for reducing computational complexity. Various results pertaining to move blocking are derived, following which, a generalised blocked VH-MPC controller is formulated for linear...

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Published in:Systems & control letters Vol. 61; no. 4; pp. 587 - 594
Main Authors: Shekhar, Rohan C., Maciejowski, Jan M.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01.04.2012
Elsevier
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ISSN:0167-6911, 1872-7956
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Abstract This paper introduces a new formulation of variable horizon model predictive control (VH-MPC) that utilises move blocking for reducing computational complexity. Various results pertaining to move blocking are derived, following which, a generalised blocked VH-MPC controller is formulated for linear discrete-time systems. Robustness to bounded disturbances is ensured through the use of tightened constraints. The resulting time-varying control scheme is shown to guarantee robust recursive feasibility and finite-time completion. An example is then presented for a particular choice of blocking regime, as would be applicable to vehicle manœuvring problems. Simulations demonstrate the efficacy of the formulation.
AbstractList This paper introduces a new formulation of variable horizon model predictive control (VH-MPC) that utilises move blocking for reducing computational complexity. Various results pertaining to move blocking are derived, following which, a generalised blocked VH-MPC controller is formulated for linear discrete-time systems. Robustness to bounded disturbances is ensured through the use of tightened constraints. The resulting time-varying control scheme is shown to guarantee robust recursive feasibility and finite-time completion. An example is then presented for a particular choice of blocking regime, as would be applicable to vehicle manAuvring problems. Simulations demonstrate the efficacy of the formulation.
This paper introduces a new formulation of variable horizon model predictive control (VH-MPC) that utilises move blocking for reducing computational complexity. Various results pertaining to move blocking are derived, following which, a generalised blocked VH-MPC controller is formulated for linear discrete-time systems. Robustness to bounded disturbances is ensured through the use of tightened constraints. The resulting time-varying control scheme is shown to guarantee robust recursive feasibility and finite-time completion. An example is then presented for a particular choice of blocking regime, as would be applicable to vehicle manœuvring problems. Simulations demonstrate the efficacy of the formulation.
Author Maciejowski, Jan M.
Shekhar, Rohan C.
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  fullname: Maciejowski, Jan M.
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Cites_doi 10.1109/CDC.2007.4434747
10.1016/j.jprocont.2007.01.001
10.1002/rnc.1059
10.1016/S0005-1098(99)00214-9
10.1016/j.automatica.2009.09.020
10.1016/S0005-1098(98)00178-2
10.1109/CDC.2009.5400609
10.1109/9.262032
10.1109/ACC.2007.4283000
10.1109/CACSD.2004.1393890
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Issue 4
Keywords Move blocking
Robust control
Variable horizon
Predictive control
Model predictive control
Time varying system
Discrete time
Blocking
Recursive method
Feasibility
Robustness
Computational complexity
Language English
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References Maciejowski (br000025) 2002
J. Löfberg, YALMIP : A toolbox for modeling and optimization in MATLAB, in: Proceedings of the CACSD Conference, Taipei, Taiwan, 2004, pp. 284–289.
Heubach, Mansour (br000055) 2009
Gondhalekar, Imura, Kashima (br000040) 2009; 45
F. Oldewurtel, R. Gondhalekar, C. Jones, M. Morari, Blocking parameterizations for improving the computational tractability of affine disturbance feedback MPC problems, in: Proceedings of the 48th IEEE Conference on Decision and Control, held jointly with the 28th Chinese Control Conference, 2009, pp. 7381–7386.
Y. Kuwata, A. Richards, J. How, Robust receding horizon control using generalized constraint tightening, in: Proceedings of the 26th American Control Conference, 2007, pp. 4482–4487.
.
URL
Bemporad, Morari (br000020) 1999; 35
Richards, How (br000010) 2006; 16
Richards, How (br000015) 2003; 5
E.C. Kerrigan, Robust constraint satisfaction: invariant sets and predictive control, Ph.D. Thesis, University of Cambridge, 2000.
GNU Linear Programming Toolkit v4.47, 2011. URL
Cagienard, Grieder, Kerrigan, Morari (br000030) 2007; 17
R. Gondhalekar, J. Imura, Recursive feasibility guarantees in move-blocking MPC, in: Proceedings of the 46th IEEE Conference on Decision and Control, 2007, pp. 1374–1379.
Michalska, Mayne (br000005) 1993; 38
E.N. Hartley, Model predictive control for spacecraft rendezvous, Ph.D. Thesis, University of Cambridge, 2010.
Mayne, Rawlings, Rao, Scokaert (br000050) 2000; 36
10.1016/j.sysconle.2012.02.004_br000045
Richards (10.1016/j.sysconle.2012.02.004_br000015) 2003; 5
10.1016/j.sysconle.2012.02.004_br000035
10.1016/j.sysconle.2012.02.004_br000080
10.1016/j.sysconle.2012.02.004_br000070
Gondhalekar (10.1016/j.sysconle.2012.02.004_br000040) 2009; 45
10.1016/j.sysconle.2012.02.004_br000060
10.1016/j.sysconle.2012.02.004_br000075
10.1016/j.sysconle.2012.02.004_br000065
Heubach (10.1016/j.sysconle.2012.02.004_br000055) 2009
Bemporad (10.1016/j.sysconle.2012.02.004_br000020) 1999; 35
Mayne (10.1016/j.sysconle.2012.02.004_br000050) 2000; 36
Michalska (10.1016/j.sysconle.2012.02.004_br000005) 1993; 38
Cagienard (10.1016/j.sysconle.2012.02.004_br000030) 2007; 17
Maciejowski (10.1016/j.sysconle.2012.02.004_br000025) 2002
Richards (10.1016/j.sysconle.2012.02.004_br000010) 2006; 16
References_xml – reference: J. Löfberg, YALMIP : A toolbox for modeling and optimization in MATLAB, in: Proceedings of the CACSD Conference, Taipei, Taiwan, 2004, pp. 284–289.
– reference: E.C. Kerrigan, Robust constraint satisfaction: invariant sets and predictive control, Ph.D. Thesis, University of Cambridge, 2000.
– reference: GNU Linear Programming Toolkit v4.47, 2011. URL
– year: 2002
  ident: br000025
  article-title: Predictive Control With Constraints
– reference: F. Oldewurtel, R. Gondhalekar, C. Jones, M. Morari, Blocking parameterizations for improving the computational tractability of affine disturbance feedback MPC problems, in: Proceedings of the 48th IEEE Conference on Decision and Control, held jointly with the 28th Chinese Control Conference, 2009, pp. 7381–7386.
– volume: 38
  start-page: 1623
  year: 1993
  end-page: 1633
  ident: br000005
  article-title: Robust receding horizon control of constrained nonlinear systems
  publication-title: IEEE Transactions on Automatic Control
– volume: 17
  start-page: 563
  year: 2007
  end-page: 570
  ident: br000030
  article-title: Move blocking strategies in receding horizon control
  publication-title: Journal of Process Control
– volume: 36
  start-page: 789
  year: 2000
  end-page: 814
  ident: br000050
  article-title: Constrained model predictive control: stability and optimality
  publication-title: Automatica
– reference: .
– reference: E.N. Hartley, Model predictive control for spacecraft rendezvous, Ph.D. Thesis, University of Cambridge, 2010.
– reference: . URL
– volume: 16
  start-page: 333
  year: 2006
  end-page: 351
  ident: br000010
  article-title: Robust variable horizon model predictive control for vehicle maneuvering
  publication-title: International Journal of Robust & Nonlinear Control
– volume: 45
  start-page: 2869
  year: 2009
  end-page: 2875
  ident: br000040
  article-title: Controlled invariant feasibility—a general approach to enforcing strong feasibility in MPC applied to move-blocking
  publication-title: Automatica
– reference: R. Gondhalekar, J. Imura, Recursive feasibility guarantees in move-blocking MPC, in: Proceedings of the 46th IEEE Conference on Decision and Control, 2007, pp. 1374–1379.
– reference: Y. Kuwata, A. Richards, J. How, Robust receding horizon control using generalized constraint tightening, in: Proceedings of the 26th American Control Conference, 2007, pp. 4482–4487.
– year: 2009
  ident: br000055
  article-title: Combinatorics of Compositions and Words
– volume: 5
  start-page: 4034
  year: 2003
  end-page: 4040
  ident: br000015
  article-title: Model predictive control of vehicle maneuvers with guaranteed completion time and robust feasibility
  publication-title: Proceedings of the American Control Conference
– volume: 35
  start-page: 407
  year: 1999
  end-page: 427
  ident: br000020
  article-title: Control of systems integrating logic, dynamics, and constraints
  publication-title: Automatica
– ident: 10.1016/j.sysconle.2012.02.004_br000080
– ident: 10.1016/j.sysconle.2012.02.004_br000035
  doi: 10.1109/CDC.2007.4434747
– volume: 17
  start-page: 563
  issue: 6
  year: 2007
  ident: 10.1016/j.sysconle.2012.02.004_br000030
  article-title: Move blocking strategies in receding horizon control
  publication-title: Journal of Process Control
  doi: 10.1016/j.jprocont.2007.01.001
– ident: 10.1016/j.sysconle.2012.02.004_br000075
– volume: 16
  start-page: 333
  issue: 7
  year: 2006
  ident: 10.1016/j.sysconle.2012.02.004_br000010
  article-title: Robust variable horizon model predictive control for vehicle maneuvering
  publication-title: International Journal of Robust & Nonlinear Control
  doi: 10.1002/rnc.1059
– year: 2009
  ident: 10.1016/j.sysconle.2012.02.004_br000055
– volume: 36
  start-page: 789
  issue: 6
  year: 2000
  ident: 10.1016/j.sysconle.2012.02.004_br000050
  article-title: Constrained model predictive control: stability and optimality
  publication-title: Automatica
  doi: 10.1016/S0005-1098(99)00214-9
– year: 2002
  ident: 10.1016/j.sysconle.2012.02.004_br000025
– volume: 45
  start-page: 2869
  issue: 12
  year: 2009
  ident: 10.1016/j.sysconle.2012.02.004_br000040
  article-title: Controlled invariant feasibility—a general approach to enforcing strong feasibility in MPC applied to move-blocking
  publication-title: Automatica
  doi: 10.1016/j.automatica.2009.09.020
– volume: 35
  start-page: 407
  issue: 3
  year: 1999
  ident: 10.1016/j.sysconle.2012.02.004_br000020
  article-title: Control of systems integrating logic, dynamics, and constraints
  publication-title: Automatica
  doi: 10.1016/S0005-1098(98)00178-2
– ident: 10.1016/j.sysconle.2012.02.004_br000065
– ident: 10.1016/j.sysconle.2012.02.004_br000045
  doi: 10.1109/CDC.2009.5400609
– volume: 38
  start-page: 1623
  issue: 11
  year: 1993
  ident: 10.1016/j.sysconle.2012.02.004_br000005
  article-title: Robust receding horizon control of constrained nonlinear systems
  publication-title: IEEE Transactions on Automatic Control
  doi: 10.1109/9.262032
– volume: 5
  start-page: 4034
  year: 2003
  ident: 10.1016/j.sysconle.2012.02.004_br000015
  article-title: Model predictive control of vehicle maneuvers with guaranteed completion time and robust feasibility
  publication-title: Proceedings of the American Control Conference
– ident: 10.1016/j.sysconle.2012.02.004_br000060
  doi: 10.1109/ACC.2007.4283000
– ident: 10.1016/j.sysconle.2012.02.004_br000070
  doi: 10.1109/CACSD.2004.1393890
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SubjectTerms Adaptative systems
Applied sciences
Blocking
Computer science; control theory; systems
Control systems
Control theory. Systems
Disturbances
Effectiveness
Exact sciences and technology
Feasibility
Horizon
Mathematical models
Move blocking
Optimal control
Predictive control
Robust control
Robustness
Variable horizon
Title Robust variable horizon MPC with move blocking
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