International Journal of Engineering Technology and Management (IJETM) Available Online at www.ijetm.org Volume 3, Issue 1; January-February: 2016; Page No. 09-17 ISSN: 2394-6881 Corresponding author: Mr. Arunkumar G. 9 Experimental investigation of the vibration suppression of smart beams in the laboratory Mr. Arunkumar G., #1 B.E., M.Tech., (Ph.D.-VTU) , Dr. T.C.Manjunath, *2 B.E., M.E., Ph.D. (IIT Bombay), 1 Research Scholar doing Ph.D., Visvesvaraya Technological University (VTU)-Belgaum, Karnataka 2 Principal, Professor, ECE Dept., Nandi Inst. of Tech. & Mgmt. Sciences, Bangalore-45, Karnataka Email: tcmanjunath@gmail.com ABSTRACT: In this paper, an experiment is conducted in the laboratory to show the demonstration of the suppression of vibrations of a smart cantilever beam when it is subjected to an external disturbance. The experimental results show the effectiveness of the new type of experimental approach developed in this paper. Key Words: Matlab, Simulink, Experiment, POF, FOS, Cantilever Beam INTRODUCTION: A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. Smart Materials and Structures are committed to the understanding, expansion and dissemination of knowledge in this subject matter. To this end, the Journal publishes articles in the following areas [60]: • Smart materials development and application— including, but not limited to, shape memory alloys and polymers, electro and magnetorheological materials, piezoelectrics, ferroelectrics, piezomagnetics, electro and magnetostrictive materials, thermoelectrics, photovoltaics, electro and magnetocaloric materials, electrochromics, IPMCs, electroactive polymers, energy storage materials, ferroelectrics, self-healing materials and multifunctional materials in general [60]. • Smart materials utilized as sensors and actuators with applications at any scale [59]. • Adaptive structural systems, actively controlled structures with smart materials and other non- traditional actuators [58]. • Sensor and sensor networks for smart materials and structure applications, processing of sensor information for adaptive control or structural health monitoring as well as integration of these sensor networks into materials and structures [57]. • Smart optical materials for modification in spectral shifts and refractive index shift [56]. • Structural health monitoring with applications to ground vehicles, aircraft and civil infrastructure [55]. • Intelligent systems, integrated with sensors, actuators and controllers, applied to automation and robotic systems that utilize smart material systems [54]. • Energy harvesting systems including modelling, applications and implementation issues [53]. In recent years, a smart system, which consists of a cantilever beam bonded with a piezoelectric actuator, has drawn much interest of many researchers [1] – [10]. At the same time, the controller designs based on positioning control and vibration suppression of the smart system have attracted wide attention around the world [6]. Especially for dynamic modeling task and vibration reduction work of a smart cantilever beam with piezoelectric materials, there have been lots of studies on suppressing vibration with a designed controller [11] – [20]. For example, a full-order model is developed using assumed model expansion and the Lagrangian approach for a flexible cantilever beam bonded with a PZT patch to control a base motion [21] – [30], a finite element model of the three-layered smart beam is utilized to reduce vibration by a velocity feedback controller [31] – [40], and the multimodal vibration suppression of a smart flexible cantilever beam with piezoceramic actuator and sensor by using a pole placement method is proposed [41] – [50]. Smart materials such as sensors & actuators together integrated or embedded into the structure aƌe ǁhat is Đalled a “ŵaƌt “tƌuĐtuƌe aŶd aƌe ofteŶ