Patent ID: 6825592
Filing Date: 2004-11-30
Classification: H01L

Abstract:
A method for configuring a vibratory system for moving a driven element in at least a first and a second direction, the system including the driven element and a vibratory element, the vibratory element having a source of vibration that converts electrical energy directly to physical motion, the vibratory element having a predominant axis and having a selected contacting portion located to be engaged with the driven element at an inclination angle &agr; to a tangent to the driven element at the selected contacting portion, the method comprising:determining a first inclination angle &agr;1 for which the vibratory system optimally moves the driven element in the first direction at a first speed when the source of vibration is excited with a first electric signal of a first frequency; determining a second inclination angle &agr;2 for which the vibratory system optimally moves the driven element in the second direction at a second speed when the source of vibration is excited with a second electric signal of a second frequency, the second inclination angle being different from the first inclination angle; selecting an intermediate inclination angle for the operation of the vibratory system, the intermediate inclination angle being between the first and second inclination angles, for which the vibratory system moves the driven element in the first direction at a third speed when the source of vibration is excited with the first electric signal and moves the driven element in the second direction with a fourth speed when the vibratory element is excited with the second electric signal; wherein the first, second, third and fourth speeds are non-zero.