@INPROCEEDINGS{Hemsel1997,
  author = {Hemsel, Tobias and Wallaschek, J{\"o}rg},
  title = {Ultrasonic motors for linear positioning tasks in automobiles},
  booktitle = {Proceedings of the 30th International Symposium on Automotive Technology
	\& Automation (ISATA)},
  year = {1997},
  pages = {631-637},
  address = {Florenz, Italien},
  abstract = {Piezoelectric ultrasonic motors are a new kind of actuators that produce
	high driving-forces related to their volume. Beside rotary drives
	like the travelling wave motor many linear drives have been developed
	and are already commercially available today. These motors can provide
	static holding-forces and driving-forces of up to 30 N at velocities
	of up to 220 mm/s. These operational characteristics, which are expected
	to be improved continuously, make these devices attractive as direct-drives
	for sliding roofs or windows in automobiles.
	
	In this contribution a short outline of the present state-of-the-art
	of linear ultrasonic motors is given. Different operating principles
	are compared with respect to the potential driving-force and power.
	Finally the working-principle of a newly developed motor, which uses
	the piezoelectric d33-effect, is explained in detail. Theoretical
	and experimental results show that this motor is capable of achieving
	high driving-force and rated output-power},
  file = {hniid1250.pdf:hniid1250.pdf:PDF},
  owner = {K. Agbons jr},
  timestamp = {2013.11.23}
}