Concept

Fractional factorial design

Related publications (39)

Sensorless Speed Control of Traveling Wave Ultrasonic Motor

Yves Perriard, Markus Flückiger, Matteo Bullo

Ultrasonic motors are a good alternative to electromagnetic motors in medical robotics, since they are electromagnetically compatible. Estimating speed instead of using encoders reduces cost and dimension of the robot on the one hand and increases reliabil ...

2006

Competitive effects of herbaceous vegetation on tree seedling emergence, growth and survival: does gap size matter?

Alexandre Buttler, Charlotte Vandenberghe, François Frelechoux

Question: What is the effect of gap size on the seedling emergence, growth and survival of four common tree species in wooded pastures? Location: A pasture in the Jura mountains, Switzerland. Methods: Seeds were sown in a complete three-way factorial desig ...

2006

Sensitivity Analysis and Optimization of a Standing Wave Ultrasonic Linear Motor

Yves Perriard, José Fernandez Lopez

This paper presents the sensitivity analysis of an ultrasonic linear motor using design of experiments (DOE) and the finite element (FE) optimization of its deformation amplitude. A first ultrasonic linear motor prototype has been built at the laboratory. ...

2006

Design optimization analysis of a standing wave ultrasonic linear actuator

Yves Perriard, José Fernandez Lopez, Yann Ruffieux

The design, properties and optimization of an ultrasonic actuator are presented. Numerical modeling has been carried out and simulations with the FEM Ansys software have been realized. To avoid performing a large number of simulations, input parameters lik ...

2005

Monitoring and control of Gluconacetobacter xylinus fed-batch cultures using in situ mid-IR spectroscopy

Urs von Stockar, Ian William Marison, Sergio Valentinotti, Henri Kornmann

A partial least-squares calibration model, relating mid-IR spectral features with fructose, ethanol, acetate, gluconacetan, phosphate and ammonium concns. has been designed to monitor and control cultivations of Gluconacetobacter xylinus and prodn. of gluc ...

2004

Development of high temperature superconductor current leads for 70 kA

Rainer Wesche

The Forschungszentrum Karlsruhe (FZK) and the Centre de Recherches en Physique des Plasmas (CRPP) are working on a joint development program to construct and test a 70 kA current lead using High Temperature Superconductors (HTS) for the Toroidal Field (TF) ...

2002

Preferential Treatment of Acknowledgment Packets in a Differentiated Services Network

Patrick Thiran

In the context of Differentiated Services (DiffServ), we investigate the effect of acknowledgment marking on the throughput of TCP connections. We carry out experiments on a testbed offering three classes of service (Premium, Assured and Best-Effort), and ...

2001

Electrothermal atomic absorption spectrometric determination of lead and tin in slurries. optimization study

A comparative study of the efficiencies of W, Mg, Mg + Pd, Ir + Mg and Ir + W + PO43- as chem. modifiers for the thermal stabilization of Pb and Sn in slurries was performed. The Ir + Mg modifier contributes more than the others to minimizing matrix effect ...

1997

Studies of Self-Consistent-Field Structure in a Quasi-Optical Gyrotron

Minh Quang Tran

The presence of an electron beam in a quasioptical gyrotron cavity alters the structure of the fields from that of the empty cavity. A computer code has been written that calculates this alteration for either an electron beam or a thin dielectric tube plac ...

1993

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