Analysis and modelling of reducing translational vibration responseinmain system and electrical energy generated by dynamic vibration absorber mechanism with Cantilever Piezoelectric (CPVA) method

Vibrations often occur in industrial machinery. One of solution to reduce excessive vibration is to add Dynamic Vibration Absorber (DVA). The principle of dynamic vibration absorber working is addition mass of absorber and spring in the main system. DVA reduce vibration from main system with resulted vibration which has opposite direction to vibration main system. According to the research by Pachpute [1], Using DVA is proven to reduce main system vibration which operated by natural frequency significantly. This research had been design a mechanism of vibration absorber and energy harvesting with Cantilever Piezoelectric Vibration Absorber (CPVA) method. In this research, the main system is flat plate which supported by four springs. The plate has been received an excitation force from springs below which are connected with eccentric masses on DC motor. Spring used to support flat plate has the same value of spring stiffness 300 N / m. So the excitation that occurs on flat plate is only in translational direction. This research are going to analysis various amplitude of eccentric mass at 0.025 m, 0.030 m, and 0.035 m. Rotational velocity of DC motor is 20.61 rad/s (natural frequency), 22.05 rad/s (harvesting frequency), and 25 rad/s (valley frequency). Various number of cantilever piezoelectric which used are 2600, 2800, and 3000 pieces. The result from simulation process shows that the highest value of power generation and percentage of CPVA reduction is 3.52E-7 watt and 20.36% in natural frequency. Furthermore, the simulation also resulted CPVA characteristic and various number of optimum range piezoelectric in 1400 - 2400 pieces. In that following range, power generation and percentage reduction of main mass displacement that can be reached by CPVA are 5.78E-7 watt and 22.75%.