![]() ![]() The vibration usually occurs due to the imbalance of the moving parts of the machine. Spring mounts are essential isolating equipment used in most industrial machinery which by virtue of their design have reciprocating or rotating parts that creates vibration. Mechanical springs and spring-dampers are heavy-duty isolators used for building systems and industry. Featuring durable, metal construction, these passive isolation systems require no maintenance, use little space, and keep functioning under varying temperatures and in corrosive environments. Wire rope isolators are the ideal solution for providing low frequency, highly damped vibration isolation and excellent shock attenuation. ![]() Sometimes this premature deterioration stems from repeated overstress loadings, sometimes from fatigue failures of vital parts, and sometimes from a combination of both. These disturbances erode the life of mechanical and electronic equipment – driving machinery from service long before necessary. ![]() Shock and vibration rank among the most destructive agents in industrial environments. Vibration isolators typically include wire rope, spring mount, ceiling mount and seismic mount types while shock mounts include elastomer, neoprene, pad-type, stud, plate and roof mounts. In machinery applications, vibration damping mounts acting like a shock absorber, allowing motors and equipment to operate more quietly and efficiently. When the surface on one side of the mount receives a sizable force or shock, the resulting tremors are unable to pass through to the other surface, as they would if the two surfaces connected by more conventional means. The basic function of a vibration isolation mount is to act as a highly stable buffer between the source of the vibration and the object or surface being isolated. Eventually this adversely affects product quality and can even bring production to a stop. Those vibrations cause damage to the equipment and create unsafe working conditions. Applications such as large motors and industrial machines generate powerful vibrations and excessive noise when active. The results show that the performance of control system with 5 andĮven 3 optimally placed sensors is at least 8% better than the original benchmark building design with 5 sensors.Vibration isolation mounts protect machinery by reducing the amplitude and frequency of vibrational waves. The benchmark building for placement of 5 and 3 sensors. The efficiency of proposed method is evaluated on To new or existing buildings, as the accelerometer placement is trivial. Due to low cost, high reliability, controlĮffectiveness as well as installation simplicity, acceleration type sensors are considered. Not depend on the control strategy and nonlinear dynamics of the control system. The optimal placement scheme is general for passive, active and semi-active controls and it does In this paper, a general method based on a proposed constrained GA is suggested to optimally The improvements in the effectiveness of the proposed methodology as compared to previously developed techniques are demonstrated through comparative studies.Īppropriate sensor placement can strongly influence the control performance of structures. Control is achieved through the placement of one or more active con- trol devices placed on various floors in an active bracing configuration. ![]() The first example considers a 40-story shear building, and the second is a full-scale, irregular, 9-story building. To illustrate the proposed methodology, two numerical examples are considered. Active control devices are used and an H2/LQG controller based on acceleration feedback is selected for this study based on previous successes with this approach in civil engineering systems. The approach is flexible, allowing the designer to base the placement scheme on performance goals and/or system requirements. This paper proposes an integrat- ed technique to place devices and design controllers based on the use of genetic algorithms. Additionally, for the most effective control system, the placement scheme should be integrated with the design of the controller rather than sequential. Placement of control devices is strongly linked to the performance of a control system, and the most appro- priate device placement scheme is strongly dependent on the performance objectives of the con- trol system. One challenge in the application of control systems to civil engineering structures is appro- priate integration of a control system into a structure to achieve effective performance. ![]()
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