Development of Shock-Wave-Powered Actuators for High Speed Positioning
Akira Kotani*, Toshiharu Tanaka*, and Atsushi Fujishiro**
*Department of Mechanical Engineering, Toyota National College of Technology, 2-1 Eisei-cho, Toyota, Aichi 471-8525, Japan
**Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furou-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
A shock wave is a compressive wave which propagates at supersonic speed. A shock wave is generated by the emission of energy for a very short duration by high speed phenomena, such as explosions, discharges, collisions, high speed flights, etc. Shock tube experiments have played an important role in the field of high speed gas dynamics. A shock tube is usually divided by a diaphragm into a driver section and a driven section. Generally, the initial conditions of the driver and driven sections are high and low pressure, respectively. When the diaphragm breaks, a shock wave is generated in the driven section. The density, temperature and pressure of the gas behind the shock wave rise discontinuously. The shock wave arrives at the end wall of the tube, and a reflected shock wave is generated by the reflection from the wall. The quantities behind the reflected shock wave rise further. If the shock wave can be generated continuously without the diaphragm needing to be changed, this phenomenon could possibly be applied to an actuator having a piston that moves at high speed. In this study, equipment powered by a shock wave is produced, and its performance is examined. The results show that piston movement generated by a shock wave is faster than that which is not and that the piston speeds depend on the initial conditions. Also, the characteristic of the actuator powered by the shock wave is revealed.
-  K. Takayama (Ed.), “Shock Wave Handbook,” Springer-Verlag Tokyo, pp. 7-8, 1996. (in Japanese)
-  T. Suzuki, “An Introduction to Shock Wave Theory,” Shiseibunko, pp. 62-75, 2000. (in Japanese)
-  H. W. Liepmann and A. Roshko, “Elements of Gasdynamics,” Dover Publications, Inc., pp. 39-83, 2001.
-  Z. Han and X. Yin, “Shock Dynamics,” Kluwer Academic Publishers and Science Press, Dover Publications, pp. 1-18, 1993.
-  M. Kadotani, T. Kitagawa, S. Katto, T. Hirayama, T. Matsuoka, H. Yabe, and K. Sasaki, “Development of Pneumatic Servo Bearing Actuator for Nanometer Positioning,” Int. J. of Automation Technology, Vol.3, No.3, pp. 249-256, 2009.
-  T. Muto, “Drive and Control of Actuator,” Corona Publishing co., ltd, pp. 49-50, 2008. (in Japanese)
-  J. Wang, J. Pu, and P. Moore, “A Practical Control Strategy for Servo-Pneumatic Actuator Systems,” Control Engineering Practice, Vol.7, Issue 12, pp. 1483-1488, December 1999.
-  T. Oiwa, M. Katsuki, M. Karita, W. Gao, S. Makinouchi, K. Sato, and Y. Oohashi, “Questionnaire Survey on Ultra-precision Positioning,” Proc. of The Fourth Int. Conf. on Positioning Technology, pp. 160-165, 2010.
-  J. Yang, O. Onodera, and K. Takayama, “Design and Performance of Quick Opening Shock Tube Using Rubber Membrane for Weak Shock Wave Generation,” Trans. of the Japan Society of Mechanical Engineers, Series B, Vol.60, No.570, pp. 473-478, 1994. (in Japanese)
-  A. Abe and K. Takayama, “Interaction of ShockWave with Array of Cylinders,” The Memoirs of the Institute of Fluid Science Tohoku University, Vol.10, pp. 109-129, 1999. (in Japanese)
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 International License.