Department of Mechanical Engineering, Faculty of Engineering
Department of Mechanical Engineering, Graduate School of Engineering
Department of Mechanical and Aerospace Engineering, Mechanical Engineering Course, School of Engineering
Mechanical vibration is an important phenomenon affecting performance, quality and safety of machines. There are many demands for effective analysis, control and beneficial use of the vibration. Also, analyzing the machine vibration and the structural vibration excited by an external device is effective for health diagnosis of the machine and the structure. The diagnosis and non-destructive testing are industrially important issues. So in our laboratory, we operate following studies: 1) Effective vibration analysis and control method to improve the performance and quality of the machines. 2) A new mechanism whose passive vibration automatically follows the excitation frequency. This mechanism has potential to apply a vibration control device and a power generator for vibration energy harvesting. 3) New diagnosis methods focusing on instantaneous frequency of ultrasonic pulse. The instantaneous frequency is time varying frequency of waves. It is a sensitive property for small changes of the pulse. 4) Non-destructive testing and measurement using vibrations such as ultrasound.