Cifa S.p.a.

Sicame

Isaac S.r.l.

Politecnico Di Milano

Penz S.r.l.

Francesco Ripamonti

Paolo Dario Maini

Nicola Pirri

Ferruccio Resta

Mauro Marco Cortellini

Alessandra Manenti

Alessandro Tosi

Alberto Bussini

Paolo Maria Ossi

Mario Francesco Moro

Massimo Mantineo

The present invention relates to a system for identification and active control of vibrations () in a structure (), comprising at least one inertial device () associable with the structure (), comprising at least one movable mass () and configured for a first controlled movement of the at least one movable mass () in order to excite the structure (); one or more movement sensors () configured for detecting vibrations of the structure (); at least one processing device () operatively connected to the one or more movement sensors () and to the least one inertial device (), the at least one processing device () being configured for: identifying a set of first parameters determinable by the one or more movement sensors () in response to environment-induced vibrations of the structure (); identifying a set of second parameters determinable by the one or more movement sensors () in response to the first controlled movement of the at last one movable mass (); calculating a dynamic model, wherein the set of first and second parameters are made consistent taking into account the at least one movable mass (); detecting threshold-exceeding vibrations of the structure () by the one or more movement sensors; controlling the at least one inertial device (), wherein the at least one inertial device () is further configured for a second controlled movement of the at least one movable mass (), based on the dynamic model. The present invention further relates to a respective method for identification and active control of vibrations in a structure.

System for identification and active control of vibrations in a structure and relating method

The present invention relates to a monitoring system of wind-induced motion or vibration in at least one overhead cable (), in particular a conductor aerial cable () of a transmission or distribution electric line. The monitoring system comprises: at least three sensor nodes () adapted to be installed in positions different from each other on a first overhead cable () and configured for detecting the motion or vibration through a synchronous signal acquisition. Each of the at least three sensor nodes () comprises a respective triaxial accelerometer sensor () configured for acquiring a first node signal and a first processor () configured for identifying, in the first node signal, a maximum node amplitude and an associated node frequency through a spectral analysis of the first node signal. The monitoring system further comprises a processing unit () operatively associable with the at least three sensor nodes () and comprising a second processor () configured for comparing to each other at least three maximum node amplitudes respectively of the at least three sensor nodes (), for identifying a selected maximum amplitude and an associated selected frequency, the selected maximum amplitude being the maximum of the at least three maximum node amplitudes. The respective triaxial accelerometer sensor () in each of the at least three sensor nodes () is further configured for acquiring a second node signal. The first processor () is further configured for identifying, in the second node signal, a node selected amplitude and an associated node selected phase through a spectral analysis of the second node signal, the node selected amplitude and the node selected phase being associated with the selected frequency. The second processor () is further configured for calculating a numerical model based on at least three node selected amplitudes and associated at least three node selected phases, for all of the at least three sensor nodes (), for reconstructing the motion or vibration in any point of the at least one overhead cable () according to the selected frequency. The present invention also relates to a related monitoring method and related sensor node.

Monitoring system of wind-induced motion or vibration in at least one overhead cable, in particular a conductor aerial cable of a transmission or distribution

An active control method to control the vibrations of an articulated arm consisting of a plurality of segments articulated with respect to each other, by means of an electronic controller, comprising the following steps:

Method to control the vibrations in an articulated arm for pumping concrete, and relative device

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Erba, Italy

Francesco Ripamonti