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683 results on '"Longhi, Sauro"'

152. Robust ripple-free regulation and tracking for parameter-dependent sampled-data systems

Author

Grasselli, Osvaldo Maria, Longhi, Sauro, Tornambe, Antonio, and Valigi, Paolo

Subjects
Discrete-time systems -- Research, Control systems -- Research, Systems analysis -- Models
Abstract

The robust ripple-free asymptotic tracking and disturbance rejection problem is studied for sampled-data systems whose matrices are assumed to depend on some "physical" parameters, each of which possibly affects all the elements of the matrices describing the system, and for the case when only a subset of the scalar outputs must track corresponding exogenous reference signals; ripple-free dead-beat regulation and tracking is also required at the nominal parameters. The necessary and sufficient conditions are given for the existence of a solution which may exist even when no solution exists for wholly independent variations of the entries of the matrices describing the system. A design procedure of both the continuous-time internal model and the discrete-time controller is also outlined.

Published
1996

154. Structural properties of multirate sampled-data systems

Author

Longhi, Sauro

Subjects
Discrete-time systems -- Analysis, Systems analysis -- Methods
Abstract

A complete analysis of the structural properties of multirate sampled-data systems is considered in this paper. Necessary and sufficient conditions for the reachability, controllability and stabilizability and for the dual notions are given in terms of simple rank tests. These results obtained by the structural theory of periodic systems, generalize to the multirate case the well-known conditions of the single-rate case.

Published
1994

165. A Smart Sensing Architecture for Domestic Monitoring: Methodological Approach and Experimental Validation

Author

Monteriù, Andrea, primary, Prist, Mario, additional, Frontoni, Emanuele, additional, Longhi, Sauro, additional, Pietroni, Filippo, additional, Casaccia, Sara, additional, Scalise, Lorenzo, additional, Cenci, Annalisa, additional, Romeo, Luca, additional, Berta, Riccardo, additional, Pescosolido, Loreto, additional, Orlandi, Gianni, additional, and Revel, Gian, additional

Published
2018
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184. Fram evaluation as unified memory for convex optimization algorithms

Author

Cimini Gionata, Ippoliti Gianluca, Longhi Sauro, and Bemporad Alberto

Subjects
Hardware_MEMORYSTRUCTURES, business.industry, Computer science, Uniform memory access, Semiconductor memory, Non-volatile memory, Model predictive control, Embedded system, Computer data storage, Convex optimization, Static random-access memory, business, Wireless sensor network, Algorithm
Abstract

Ferroelectric Random Access Memory (FRAM) by Texas Instruments (TI) is a non-volatile memory which allows lower power and faster data throughput compared to other non-volatile solutions. These features have accelerated the interest in this technology as the future of embedded unified memory, in particular in data logging, remote sensing and Wireless Sensor Network (WSN). The application of Model Predictive Control (MPC) in WSN has gained lot of attention in the last years and it requires solving convex optimization problems in real-time. In this paper several convex optimization algorithms have been implemented and compared on a FRAM-based MSP-EXP430FR5739 node by TI, to evaluate its suitability in extending the potentialities of onboard volatile Static Random Access Memory (SRAM) for embedded optimization-based control.

Published
2014
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