Active and passive damping systems for vibration control of metal machining equipment
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Passive damping is used to reduce vibrations of machining tools. The drawback with the passive damping system is that it is adjusted to damp out vibrations in one restricted frequency range. Active damping uses real time measurements to dampen the vibrations and is not tuned for one specific frequency range. Teeness AS wants to be able to investigate different ways of regulating an active damping system on a physical test bench and to investigate if an Arduino is suited for regulating the system. This paper presents the design development of the physical test bench, simulations of the designed test bench and an electrical setup with Arduino as the regulating controller. Actuators were evaluated and purchased. The test bench was designed to fit the actuators using Siemens NX as CAD program. The components of the test bench were produced by Teeness AS. Simulations of the designed test bench were conducted using FEDEM to investigate the dynamics of the system. Requirements for the Arduino were investigated and regulating scripts were coded, tested and evaluated. The simulated test bench was able to significantly reduce the vibrations investigated. However there were some behaviors of the simulated test bench that differ from the measurements made of the physical test bench. This was most likely a result of the modeling of actuators. The results from the simulations give an indication of the general behavior of the test bench, but the use of exact values should be avoided. To improve the validity of the simulations, further work with the simulation of the actuators should be conducted. Using an Arduino as a control mechanism seems promising, but further work needs to be done to reduce the noise of the sensor data and the regulating script presented in this paper should be improved.