Design and performance testing of an ultrasonic linear motor with dual piezoelectric actuators

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 59; no. 5; pp. 1033 - 1042
• Main Authors: Smithmaitrie, P., Suybangdum, P., Laoratanakul, P., Muensit, N.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acoustics; Cross-disciplinary physics: materials science; rheology; Design engineering; Electric motors; Electric potential; Exact sciences and technology; Finite element methods; Force; Fundamental areas of phenomenology (including applications); General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Materials science; Materials testing; Mathematical analysis; Physics; Piezoelectric actuators; Stators; Studies; Transducers; Transduction; acoustical devices for the generation and reproduction of sound; Ultrasonic testing; Vibrations; Voltage; Acoustic measurement; Nondestructive testing; Layered materials; Experimental study; Surface transducer; Micromotors; Electric motors; Finite element method; Vibrations; Piezoelectric motors; Piezoelectric transducers; Ultrasonic motors; Linear motors; Piezoelectric actuators; Voltage; Modelling; Ultrasonic testing; Miniaturization; Sinusoidal excitation
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/TUFFC.2012.2289

In this work, design and performance testing of an ultrasonic linear motor with dual piezoelectric actuator patches are studied. The motor system consists of a linear stator, a pre-load weight, and two piezoelectric actuator patches. The piezoelectric actuators are bonded with the linear elastic stator at specific locations. The stator generates propagating waves when the piezoelectric actuators are subjected to harmonic excitations. Vibration characteristics of the linear stator are analyzed and compared with finite element and experimental results. The analytical, finite element, and experimental results show agreement. In the experiments, performance of the ultrasonic linear motor is tested. Relationships between velocity and pre-load weight, velocity and applied voltage, driving force and applied voltage, and velocity and driving force are reported. The design of the dual piezoelectric actuators yields a simpler structure with a smaller number of actuators and lower stator stiffness compared with a conventional design of an ultrasonic linear motor with fully laminated piezoelectric actuators.