1,720,994 research outputs found
Non-minimal factorization approach to the linf-gain of discrete-time linear systems
No full textA method is presented to compute the l∞-gain of discrete-time linear MIMO systems which is based on
a newly derived sequence of factorizations for G(z ). By resorting to a chain-scattering representation of
the system, the proposed approach offers a criterion enabling one to cope with the static output feedback
l
1-control design by solving a finite set of linear inequalities. Numerical examples are reported as well as
an application to the synthesis of a performing decentralized l
1-controller
Hierarchical Model Predictive Control of independent systems with joint constraints
No full textThis paper describes a hierarchical scheme for the control of independent stable systems subject to joint constraints. At the higher layer of the control structure reduced order dynamic models are used to minimize an economic cost function by adopting a long sampling time, while at the lower layer independent shrinking horizon MPC controllers working at a faster rate are designed for the original models to guarantee stability and convergence. A novel model reduction procedure is developed and simulation results are reported to witness the potentialities of the approach
Tracking control of Wiener models with hierarchical and switching model predictive control
No full textA tracking problem is considered for a Wiener model. A two-layer hierarchical control structure is designed: the upper level controller operates at a slow rate and computes the inputs to be ideally provided to the system; the effective control actions are provided by actuators placed at the lower layer and having faster dynamics. Model predictive control (MPC) laws are synthesized for both layers. In order to cope with the discrepancy between the ideal and the effective control action, a robust MPC controller is designed at the upper level. Such a controller can switch among different operating conditions ensuring different level of robustness. In doing so, the overall controller guarantees steady-state zero error regulation for constant reference signals while trading off robustness versus system performance. A numerical example is reported
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