Now showing items 41-60 of 88

• #### Energy efficiency of pulsed actuations on linear resonators ﻿

(2009-12)
Article
Open Access
The objective of this paper is to show that under some circumstances, the sign of a sampled sinusoid sequences, briefly 􀀀, is optimal to provide maximum energy transfer to linear resonators in the context of discrete-time ...
• #### Examen Final ﻿

(Universitat Politècnica de Catalunya, 2014-06-20)
Exam
• #### Examen Final ﻿

(Universitat Politècnica de Catalunya, 2013-06-19)
Exam
• #### Examen Final ﻿

(Universitat Politècnica de Catalunya, 2018-01-16)
Exam
• #### Examen Final ﻿

(Universitat Politècnica de Catalunya, 2015-01-21)
Exam
• #### Examen Final ﻿

(Universitat Politècnica de Catalunya, 2015-06-03)
Exam
• #### Excitation of multiple spatial modes of a MENS cantilever in the pulsed digital oscillator ﻿

(IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
Conference report
Open Access
The aim of this paper is to apply an approach that will allow us to consider different mechanical modes of a MEMS cantilever in the form of separate mass-spring-damper equations with the appropriate form of an external ...
• #### Exploring the performance of a miniature 3D wind sensor under extreme martian winds up to the dust devil scale ﻿

(2019)
Conference report
Open Access
The objective of this paper is to explore the performance of a miniature 3D spherical wind sensor for Mars atmosphere, working under extreme wind speeds, up to the Dust Devil scale. The experimental campaign has been made ...
• #### Fluid dynamics and heat transfer in the wake of a sphere ﻿

(2019-04)
Article
Restricted access - publisher's policy
Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
• #### General dynamics of pulsed digital oscillators ﻿

(IEEE, 2008-02-08)
Article
Open Access
The objective of this work is to analyze pulsed digital oscillators (PDOs), as dynamical systems. It is proved that under some conditions, the bitstream at the output of the oscillator is that of the sign of a sampled ...
• #### Heat flow dynamics in thermal systems described by diffusive representation ﻿

(Institute of Electrical and Electronics Engineers (IEEE), 2016-09-01)
Article
Open Access
The objective of this paper is to analyze the dynamics of heat flow in thermal structures working under constant temperature operation. This analysis is made using the tools of sliding mode controllers. The theory is ...
• #### Impedance spectroscopy interpretation of silica and polystyrene colloidal suspensions ﻿

(2020-03-01)
Article
Restricted access - publisher's policy
Impedance spectroscopy differences between colloidal 295-nm silica and 300-nm polystyrene nanoparticles in deionized water are analyzed in this work. Using two different two-electrode measurement setups, designed for this ...
• #### INSTRUMENTACIO ELECTRONICA 1 (Examen 2n Quadr.) ﻿

(Universitat Politècnica de Catalunya, 2001-06-07)
Exam
• #### INSTRUMENTACIO ELECTRONICA 1 (Examen 2n Quadr.) ﻿

(Universitat Politècnica de Catalunya, 2001-06-11)
Exam
• #### Light source position microsensor ﻿

(Institute of Electrical and Electronics Engineers (IEEE), 2001)
Conference report
Open Access
There exist industrial applications where an accurate estimation of a light source position is needed. That is the case for a heliostat, a device that projects sunlight upon a focus hundreds of meters distant. In this paper ...
• #### Low pressure spherical thermal anemometer for space missions ﻿

(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference report
Restricted access - publisher's policy
The novelty of this 2D thermal anemometer is the spherical compact and robust design with improved sensitivity in the range of 600-900Pa of carbon dioxide pressure and 0.25 to 10 m/s wind speed. The small size (11.2mm ...
• #### Low-cost thermal s-d air flow sensor ﻿

(2002-10)
Article
Open Access
This paper describes the design and optimization of a hot-wire air flowmeter. A low-cost design of the packaging allows good thermal contact with the airflow, as well as good thermal isolation between the hot and cold ...
• #### MEMS technologies for energy harvesting ﻿

(Springer, 2016-11-11)
Part of book or chapter of book
Open Access
The objective of this chapter is to introduce the technology of Microelectromechanical Systems, MEMS, and their application to emerging energy harvesting devices. The chapter begins with a general introduction to the most ...
• #### Model identification of time-varying diffusive systems ﻿

(2018)
Conference report
Restricted access - publisher's policy
This paper presents a characterization method based on diffusive representation for a class of linear or nonlinear time-varying diffusive systems. The system variation with time may come as a result of the own actuation ...
• #### Modelling of a charge control method for capacitive MEMS ﻿

(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference report
Restricted access - publisher's policy
Charging of dielectric materials in microelectromechanical systems (MEMS) actuated electrostatically is a major reliability issue. In our previous work we proposed a feedback loop control method that is implemented as ...