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Development of a Piezoelectric Rotary Hammer DrillThe Piezoelectric Rotary Hammer Drill is designed to core through rock using a combination of rotation and high frequency hammering powered by a single piezoelectric actuator. It is designed as a low axial preload, low mass, and low power device for sample acquisition on future missions to extraterrestrial bodies. The purpose of this internship is to develop and test a prototype of the Piezoelectric Rotary Hammer Drill in order to verify the use of a horn with helical or angled cuts as a hammering and torque inducing mechanism. Through an iterative design process using models in ANSYS Finite Element software and a Mason's Equivalent Circuit model in MATLAB, a horn design was chosen for fabrication based on the predicted horn tip motion, electromechanical coupling, and neutral plane location. The design was then machined and a test bed assembled. The completed prototype has proven that a single piezoelectric actuator can be used to produce both rotation and hammering in a drill string through the use of a torque inducing horn. Final data results include bit rotation produced versus input power, and best drilling rate achieved with the prototype.
Document ID
Document Type
External Source(s)
Domm, Lukas N.
(Dalhousie Univ. Halifax, Nova Scotia, Canada)
Date Acquired
April 17, 2015
Publication Date
May 2, 2011
Subject Category
Solid-State Physics
Electronics And Electrical Engineering
Mechanical Engineering
Distribution Limits
piezoelectric actuator

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