| 摘要 |
In manufacturing electromechanical drive elements, vibration properties are defined in a test environment. These properties are found to give a good operation when being arranged in a motor. Two flexural vibration modes are defined. One is an s-mode connected to an element being strapped at two supports at respective outer portions. The s-mode have three nodal points. The other vibration mode is an I-mode (112) connected to an element being strapped at the supports and at a drive pad arranged at a middle portion (H l)-The I-mode (112) has one nodal point (155) at each side of the middle portion (111) and the middle portion (111) has a stroke amplitude that is smaller than stroke amplitudes at portions (113, 115) between the middle portion (111) and the nodal points (155). An average of the resonance frequencies of the s-mode strapped at two and three points, respectively, differs from and the I-mode (112) resonance frequency by less than 25%.
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