研究室紹介
Dynamics of Machinery
Department of Mechanical Engineering, Faculty of Engineering
Department of Mechanical Engineering, Graduate School of Engineering
Department of Mechanical Engineering, 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 phase information 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. 5) Development of approaches for analysis and design of mechanical systems using self-synchronization, a kind of nonlinear phenomena. 6) Development of open-loop control method for nonlinear transportation systems with time-varying parameters. Our target is not only mechanical and structural systems but extends to wide fields including biological objects and foods, and, further, we are actively conducting joint research with companies. |
Staff
Prof. Takumi Inoue
Assoc.Prof. Hiroki Mori
Asst.Prof. Nobuyuki Sowa
The Main Research Topics
- Effective vibration analysis method
- New mechanism that its passive vibration automatically follows the excitation frequency
- Non-destructive testing and measurement using ultrasound
- Development of methods for clarification of vibration characteristics and open-loop control of nonlinear systems
