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| 1.
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青柳, 誠司 ; 小田, 高広 ; 神谷, 好承 ; 岡部, 佐規一
概要:
Fast and fine position control of an ultrasonic motor is generally difficult because its rotational speed is nonlinear to voltage, frequency or phase shift input. This paper shows both theoretically and experimentally that the motor has
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an approximate first-order transfer function between phase shift input and rotational speed output in the case of coarse motion to a command position. This paper also shows experimentally that the rotor moves finely and intermittently in the neighborhood of the command position. A linear position control system which applies integral control action was developed. A fast response of about 50ms and fairly high positioning accuracy up to a rotary encoder resolution were both realized.
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| 2.
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論文
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小田, 高広 ; 青柳, 誠司 ; 神谷, 好承 ; 岡部, 佐規一
概要:
This study describes the development of the sheet feeding mechanism using ultrasonic vibration actuator. It consists of a driving rotor, a sub-rotor, and two sets of piezoelectoric vibrators, which is called the dual vibrator in this
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paper. That vibrator generates the mode of bending vibration. Driving rotor is rotated by the ultrasonic vibration of the dual vibrator. The driving frequency and amplitude of one vibrator is different from that of the other. In this paper, the motion of driving rotor is analyzed theoretically, and it is confirmed that its rotor can be rotated in the clockwise or counterclockwise direction. As a result of fundamental experiments, it was proved that telephone card could be fed easily, and flat and compact sheet feeding mechanism could be obtained.
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| 3.
論文 |
論文
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小田, 高広 ; 神谷, 好承 ; 岡部, 佐規一
概要:
This study describes sheet feeding method and its design concept using ultrasonic vibration actuator. The ultrasonic vib
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ration is generated by two sets of piezoelectric actuator. It is an elliptic vibration mode, which rotates two vibtaton modes in the Y-Z and X-Y planes. This paper presents a direct drive method using vibratory rotor and an indirect drive method using idling rotor about sheet feeding mechanism, and proves theoretical relations between amplitude Uz1 and sheet feeding speed υH, υH* and feeding force FH, FH*. As a result of fundamental experiments, it was proved that a sheet, such as paper and telephone card, could be fed easily using either of their methods, and high reliable and compact sheet feeding mechanism could be obtained.
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