Concept
Transfer function
Related publications (121)
A Robust Data-Driven Controller Design Methodology With Applications to Particle Accelerator Power Converters
Alireza Karimi, Achille Nicoletti, Michele Martino
A new data-driven approach using the frequency response function (FRF) of a system is proposed for designing robust-fixed structure digital controllers for particle accelerators' power converters. This design method ensures that the dynamics of a system ar ...
2019Properties of Direct-Time and Reversed-Time Transfer Functions to Locate Disturbances along Power Transmission Lines
Mario Paolone, Zhaoyang Wang, Zhe Chen
The paper discusses specific frequency-domain properties of the electromagnetic time reversal (EMTR) method applied to locate faults and, more in general, disturbances in power networks. Specifically, we investigate the properties of two transfer functions ...
IEEE2019Linear Response Theory and Green-Kubo Relations for Active Matter
Ignacio Pagonabarraga Mora, Sara Dal Cengio
We address the question of how interacting active systems in a nonequilibrium steady state respond to an external perturbation. We establish an extended fluctuation-dissipation theorem for active Brownian particles (ABP), which highlights the role played b ...
2019Multichromatic calibration method and device
A Multichromatic Calibration (MC) method of at least a spectral sensor which is one of a list comprising at least a spectrometer, a multispectral sensor, a hyperspectral sensor, a spectral camera, a color camera. The method comprises a. generating a plural ...
2019An Experimental Study of Gas Lubricated Foil Journal Bearings Using an Instrumented Rotor with Wireless Telemetry
Karim Magdi Zakaria Abdelrahman Shalash
In order to increase their efficiency and power-density, turbomachines are continuously pushed to run faster, and hotter rotors. These requirements create enormous engineering challenges that affect the design of turbomachines down to the component level. ...
EPFL2019Broadband Zero-Bias RF Field-Effect Rectifiers Based on AlGaN/GaN Nanowires
Elison de Nazareth Matioli, Giovanni Santoruvo
Microwave zero-bias rectifiers are fast devices capable of rectifying RF signals without applied bias, which have applications ranging from RF power detection to THz imaging systems. Here we present gated nanowire field-effect rectifiers (NW-FERs) fabricat ...
2019Non-linear transfer function identification of pressure probes using Siren Disks
Jürg Alexander Schiffmann, Karim Magdi Zakaria Abdelrahman Shalash, Fatma Ceyhun Sahin
This article presents a Siren Disk proof of concept for the dynamic excitation of pressure probes, and a method to reconstruct distorted signals due to pneumatic channels. Constraints in sensor installation require placing a pressure transducer distant fro ...
2018A Data-Driven Frequency-Domain Approach for Robust Controller Design via Convex Optimization
The objective of this dissertation is to develop data-driven frequency-domain methods for designing robust controllers through the use of convex optimization algorithms. Many of today's industrial processes are becoming more complex, and modeling accurate ...
EPFL2018PDE-constrained optimal control problems with uncertain parameters using SAGA
Fabio Nobile, Matthieu Claude Martin
We consider an optimal control problem for an elliptic partial differential equation (PDE) with random coefficients. The control function is a deterministic, distributed forcing term that minimizes an expected quadratic regularized loss functional. We cons ...
2018Robust H-infinity Controller Design Using Frequency-Domain Data via Convex Optimization
Alireza Karimi, Achille Nicoletti, Yuanming Zhu
A new robust controller design method that satisfies the H-infinity criterion is developed for linear time-invariant single-input single-output (SISO) systems. A data-driven approach is implemented in order to avoid the unmodeled dynamics associated with p ...
Wiley-Blackwell2018