A Single-Element Tuning Fork Piezoelectric Linear Actuator

This paper describes the design of a piezoelectric tuning-fork, dual-mode motor. The motor uses a single multilayer piezoelectric element in combination with tuning fork and shearing motion to form an actuator using a single drive signal. Finite-element analysis was used in the design of the motor, and the process is described along with the selection of the device\u27s materials and its performance. Swaging was used to mount the multilayer piezoelectric element within the stator. Prototypes of the 25-mm long bidirectional actuator achieved a maximum linear no-load speed of 16.5 cm/s, a maximum linear force of 1.86 N, and maximum efficiency of 18.9%

Design and Construction of the Tuning Fork Piezoelectric Motor

This paper describes the design of a piezoelectric tuning-fork dual-mode motor. The motor uses a single multilayer piezoelectric element in combination with tuning fork and shearing motion to form an actuator using a single drive signal. Finite-element analysis was used in the design of the motor, and the process is described along with the selection of the device’s materials and its performance. Prototypes of the actuator achieved a maximum linear no-load speed of 13 cm/s, a maximum linear force of 5.98 N, and a maximum efficiency of 25%

A Simplified Dynamic Model of the Effect of Internal Damping on the Rolling Resistance in Pneumatic Tires

The pneumatic tire was modeled as a tension band on a viscoelastic foundation, an approximation proven to be valid by previous investigators. The ground contract region of the rolling tire in steady state was found by solving a two-point boundary value problem with specified radial deflections, treating the ground contact end points as unknowns. The ground contact region was shown to shift forward in the rolling direction as a function of damping and rolling velocity. The rolling resistance was determined by integrating the forces acting through the elastic foundation on the wheel axle due to the steady state deformation of the tread band. © 1992