The fast development and spread of wireless and digital technologies implied a significant effort of maintaining up-to-date the available equipment for active control of the vibrations of structures. Indeed, the challenge consists of developing a solution which combines the features of low cost and easiness of use, desirable for a rapid replacement of the existing systems, together with the requirement of an unaltered performance level. The attention is focused on a laboratory model of a three-stories steel frame, mounted on a shaking table and monitored by accelerometers placed on each floor. On the top, the frame mounts an active mass damper (AMD) which is actually driven by two controllers. The first one uses the feedback of the accelerometers to elaborate a driving signal. The second controller prompts an engine so that the AMD motion follows the path provided by the first controller. The first controller was conceived as connected to the accelerometers by cables, but such a solution is impractical in real situations due to the installation and maintenance issues related to the cabling system. Therefore, a wireless update solution is proposed for the first controller. The second controller was originally conceived of the analogical type and it is now replaced by a digital substitute.
New Generation of Wireless and Digital Active Control Solutions
CASCIATI, SARA;CHEN, ZHICONG;FARAVELLI, LUCIA
2012-01-01
Abstract
The fast development and spread of wireless and digital technologies implied a significant effort of maintaining up-to-date the available equipment for active control of the vibrations of structures. Indeed, the challenge consists of developing a solution which combines the features of low cost and easiness of use, desirable for a rapid replacement of the existing systems, together with the requirement of an unaltered performance level. The attention is focused on a laboratory model of a three-stories steel frame, mounted on a shaking table and monitored by accelerometers placed on each floor. On the top, the frame mounts an active mass damper (AMD) which is actually driven by two controllers. The first one uses the feedback of the accelerometers to elaborate a driving signal. The second controller prompts an engine so that the AMD motion follows the path provided by the first controller. The first controller was conceived as connected to the accelerometers by cables, but such a solution is impractical in real situations due to the installation and maintenance issues related to the cabling system. Therefore, a wireless update solution is proposed for the first controller. The second controller was originally conceived of the analogical type and it is now replaced by a digital substitute.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
