Proceedings ArticleDOI
A piecewise linear approach towards sheet control in a printer paper path
TLDR
In this paper, an approach towards sheet control in a printer paper path is presented, where the complex overall control question is formulated in a hierarchical control set-up with a low level motor control part and a high level sheet control part.Abstract:
In this paper an approach towards sheet control in a printer paper path is presented. To make the control problem feasible, the complex overall control question is formulated in a hierarchical control set-up with a low level motor control part and a high level sheet control part. To understand the essence of the sheet control problem we consider a basic paper path in which industrial constraints and requirements are relaxed. Furthermore, the motor control part is assumed to be ideal and the sheet dynamics are captured in the piecewise linear modeling formalism. Based on the model of the sheet dynamics, the controller synthesis is carried out. Both state and output feedback control designs are presented and stability and tracking performance are analyzed. The effectiveness of the control design approaches is demonstrated via simulations.read more
Citations
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Proceedings ArticleDOI
Robust Stability of Networked Control Systems with Time-varying Network-induced Delays
TL;DR: In this article, the stability of a networked control system with time-varying delays is analyzed and conditions in terms of LMIs are presented guaranteeing the robust asymptotic stability of the discrete-time system.
Journal ArticleDOI
Tracking control for sampled-data systems with uncertain time-varying sampling intervals and delays
TL;DR: It is shown that feedforward preview can significantly improve the tracking performance and an online extremum seeking (nonlinear programming) algorithm is proposed to online estimate the optimal preview time.
Proceedings ArticleDOI
Analysis of distributed control systems with shared communication and computation resources
TL;DR: This work proposes an approach based on three steps: control system analysis in terms of sampling times and delays, mapping of control loops to computation/communication hardware components, and scheduling analysis, which is especially important for applications that place a heavy load on the available computation and communication resources.
Tracking control for networked control systems
TL;DR: In this paper, a solution to the approximate tracking problem for networked control systems (NCSs) with uncertain, time-varying sampling intervals and network delays is presented, and sufficient conditions for the input-to-state stability of the tracking error dynamics with respect to this perturbation are given.
Proceedings ArticleDOI
Tracking control for networked control systems
TL;DR: A solution to the approximate tracking problem for networked control systems (NCSs) with uncertain, time-varying sampling intervals and network delays is presented and bounds on the steady-state tracking error are provided.
References
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Feedback Control of Dynamic Systems
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Mikael Johansson,Anders Rantzer +1 more
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Nonlinear regulation: The piecewise linear approach
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Journal Article
Computation of Piecewise Quadratic Lyapunov Functions for Hybrid Systems
Mikael Johansson,Anders Rantzer +1 more
TL;DR: In this paper, the search for a piecewise quadratic Lyapunov function is formulated as a convex optimization problem in terms of linear matrix inequalities, and the relation to frequency domain methods such as the circle and Popov criteria is explained.