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Lorenzo
Trainelli Alcune
attività di ricerca Some research activities Principali ricerche applicate
/ l Prove di volo / Flight testing I co-operate in POLI-Xflight,
a laboratory of the Department of Aerospace Engineering (DIA) focusing on
flight operations and procedures, with an emphasis on flight testing, and in
the development of flight instrumentation (FTI). We operate the DIA P-92 very
light airplane (VLA) and work together with Club Astra and Nando Groppo srl in various
flight testing activities, included the successful flight test campaign for
the tye certification of a new VLA model. See the Poli-Xflight
page. l Simulazione e diagnostica di attuatori
elettromeccanici / Electromechaical actuator simulation and diagnostics We started an activity
concerning the dynamic modelling, simulation and monitoring of an innovative
flap actuator, under Umbra Cuscinetti ( l Analisi del Brake squeal / Brake squeal analysis We have been involved in
disc brake squeal analysis geared towards brake system robust design and
optimization, under Brembo
( l Misure delle risorse eoliche / Wind resource measuring As scientific consultant,
I supported TecnoGaia,
an Italian firm involved in wind resource assessement.
A test campaign has been carried out in 2008 with a MiniSODAR (Sound Detection and Ranging) equipment
in conjunction with a traditional met mast to assess the capability of this
instrument as a wind profiler. l Modellazione e simulazione di generatori eolici
/ Wind turbine modeling
and simulation The research group led by
Carlo Bottasso is significantly involved in modern
wind turbine generator (WTG) technologies under a number of sponsorships,
including Leitner, Trevi, Tozzi Nord ( See the Poli-Wind
pages on prof. Bottasso's
website. l Modellazione e simulazione di elicotteri e
convertiplani / Rotorcraft modeling and simulation Traditionally, the
Aerospace Engineering Dept. of Politecnico di Milano co-operates with AgustaWestland, a
world-leading rotorcraft manufacturer, in the analysis, simulation and
testing of rotorcraft systems. Our research group is involved in the aeroelastic simulation of helicopter and tilt-rotor machines
and their subsystems, trajectory optimization and optimal control of
rotorcraft maneuvers, rotorcraft UAV control system
design, implementation and testing, rotorcraft simulator design,
implementation and testing, etc. See the Poli-Rotorcraft pages on prof.
Bottasso's website. Formulazioni teoriche e numeriche / Theoretical and numerical formulations l Teoria delle rotazioni e del moto rigido
/ Theory of rotation and rigid motion Since inception of my PhD
project, I was involved in the problem of the representation and
parameterization of rigid motion. An appropriate formulation, which does not
involve significant additional complexity, can be used to obtain numerical
procedures endowed with nonconventional geometric integration properties,
such as frame invariance, momenta conservation and
energy conservation. This formulation basically extends well known formalism
and properties of pure rotation to complete rigid motion, yielding very
elegant expressions fit for practical use. l Integrazione numerica di ODE e DAE / Numerical integration of ODEs and DAEs I am interested in the
geometric integration of stiff differential equations arising in various
areas of computational mechanics. By this approach, through the preservation of
certain invariants, one may get enhanced stability features, and an overall
higher quality solution. I am working on two separate threads that may
eventually overlap: energy preserving/decaying integrators and consistent
index reduction procedures for DAEs (Embedded
Projection Method). Recently, I joined in a novel, promising effort to solve
numerical difficulties connected to DAE solution through another approach
involving preconditioning of the related linearized
system. l Dinamica strutturale e multicorpo
/ Structural and multibody dynamics Our research group is
active in flexible multibody dynamics since the
early '90. In co-operation with prof. O.A. Bauchau's group at GaTech,
we developed a modern, highly reliable, finite-element based multibody code that implements geometrically nonlinear
formulations for various structural elements, classical as well as
nonconventional joint elements, contact-impact procedures, complex
aerodynamic force fields, hydraulic and electric elements, control systems,
etc. within a robust time integration framework. The code allows for full
steady-state, dynamic (transient) and periodic stability analyses, and has
been tested against a number of industrial real-life problems, including
rotorcraft aeroelastic analysis. l Meccanica del volo ala fissa e rotante / Aircraft and rotorcraft flight mechanics Apart from teaching Basic
Flight Mechanics at the undergraduate level, I am interested in diverse
aspects of this subject. Among them, I worked on prof.
Borri's formulation of basic aircraft trim and
stability, a remarkably simple approach that can be effectively used both in
education and in preliminary aircraft design. Documentazione disponibile / Dowloadables l Elenco completo / Complete list l Selezione di pubblicazioni / Selected publications Gruppo di lavoro / Research group l Prof. Carlo L. Bottasso, PhD l Alessandro Croce, PhD, lecturer l
Massimo Ricciardi, research assistant |
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Last updated
26/11/2010 |
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