By Matthew Westra
Utilizing Matthew Westras conversational and class-tested booklet, scholars will examine the abilities they should take an energetic position within the communique strategy. applicable for helpers-in-training from a number of disciplines, together with counseling, human providers, psychology, speech verbal exchange, instructor schooling, company, and healthiness, this publication is helping scholars learn how to detect, mirror upon, and perform lively listening in a aiding surroundings. Interdisciplinary functions of listening and conversing are provided to aid facilitate improvement of the really expert techniques that aiding pros hire.
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Extra resources for Active Communication
Sample text
Based on longitudinal vibration The motor based on the longitudinal vibration mode belongs to the standing wave motor. This kind of motor uses the Langevin vibrator with high converting efficiency from electrical energy to mechanical energy. However, the abrasion of the friction material on the contact surface is serious. The first standing wave ultrasonic motor proposed by Sashida bclongs to this kind of motors. The longitudinal vibration of the stator in one direction can be transformed into the rotating motion of the rotor through the deformation of the flexible sheet.
1 13 Introduction Load Characteristics Figure 1. 20 shows the comparison of the load characteristics (measured) of DC motor with USM. It can be seen that when DC motor approaches the no-load speed. its efficiency is maximum and output torque is smaller. On the contrary. the ultrasonic motor's efficiency is maximum in conditions of the lower speed and higher torque. Therefore, USM is suitable for operating at low speed and high torque. and can directly drive loads. "!. "!. 20 Output lorque I(N 'm) (b) Ullrasonic motor Fig.
This kind of motor uses the Langevin vibrator with high converting efficiency from electrical energy to mechanical energy. However, the abrasion of the friction material on the contact surface is serious. The first standing wave ultrasonic motor proposed by Sashida bclongs to this kind of motors. The longitudinal vibration of the stator in one direction can be transformed into the rotating motion of the rotor through the deformation of the flexible sheet. In 1998, Kurosawa proposed a linear ultrasonic motor with higher drive efficiency using the composite mode of two longitudinal vibration1l6 -.
