Publications associées à Instrumentation (science)

Direct Data-Driven Vibration Control for Adaptive Optics

Adaptive optics (AO) systems are used in ground- based telescopes to improve image resolutions, especially for long-exposure photography, by compensating for the effects of atmospheric turbulence and internal vibrations. Most current AO systems are based o ...

2023

Distributed Temperature Sensing Using Gas-filled Conjoined-tube Anti-resonant Fiber

Luc Thévenaz, Malak Mohamed Hossameldeen Omar Mohamed Galal, Li Zhang

Distributed temperature measurement is conducted for the first time in a gas-filled conjoined-tube hollow-core anti-resonant fiber (HC-CAF) at a pressure of 34.7 bar. A Brillouin gain of 0.08 m−1W−1 and a temperature sensitivity of 2 MHz/K are yielded. ...

Optica Publishing Group2022

Gas pressure measurement device

Ian Michael Rousseau, Pirouz Sohi

The present invention concerns vacuum pressure gauge or gas pressure measurement device comprising a polar semiconductor structure, at least one light source for illuminating a surface of the polar semiconductor structure, measurement means configured to m ...

2019

Ordering Events Based on Intentionality in Cyber-Physical Systems

Jean-Yves Le Boudec, Simon Bliudze, Wajeb Saab, Maaz Mashood Mohiuddin

We consider cyber-physical systems (CPSs) comprising a central controller that might be replicated for high-reliability, and one or more process agents. The controller receives measurements from process agents, causing it to compute and issue setpoints tha ...

2018

Ordering Events Based on Intentionality in Cyber-Physical Systems

Jean-Yves Le Boudec, Simon Bliudze, Wajeb Saab, Maaz Mashood Mohiuddin

We consider cyber-physical systems (CPSs) comprising a central controller that might be replicated for high-reliability, and one or more process agents. The controller receives measurements from process agents, causing it to compute and issue setpoints tha ...

2017

Practical control methods for vacuum driven soft actuator modules

Jamie Paik, Matthew Aaron Robertson

Vacuum-powered Soft Pneumatic Actuator (VSPA) Modules have been described to afford advantages for rapid development of reconfigurable, multi-DoF soft pneumatic robots powered by vacuum by reducing their logistical complexity, however they also present new ...

2017

Adaptive control of a deployable tensegrity structure

Ian Smith, Ann Christine Sychterz, Nicolas Willy Veuve

Deployable structures belong to a special class of moveable structures that are capable of form and size change. Controlling movement of deployable structures is important for successful deployment, in-service adaptation and safety. In this paper, measurem ...

2017

WHO'S ON BOARD? Probabilistic Membership for Real-Time Distributed Control Systems

Rachid Guerraoui, David Kozhaya

To increase their dependability, distributed control systems (DCSs) need to agree in real time about crashed hosts, i.e., they need a real-time membership service. In this paper, we prove that such a service cannot be implemented deterministically if, besi ...

Ieee2016

An Update on Experimental Data Obtained at the Santis Tower

Mario Paolone, Marcos Rubinstein, Mohammad Azadifar, Farhad Rachidi-Haeri, Davide Pavanello

The Santis Tower was instrumented in May 2010 and, to this date, more than 400 flashes were successfully recorded. Lightning current waveforms and their time-derivatives are measured at two different heights along the tower (24-m and 82-m AGL). In this pap ...

IEEE2015