NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Auto-Gopher: A Wireline Deep Sampler Driven by Piezoelectric Percussive Actuator and EM Rotary MotorThe ability to penetrate subsurfaces and perform sample acquisition at depth of meters may be critical for future NASA in-situ exploration missions to bodies in the solar system, including Mars and Europa. A corer/sampler was developed with the goal of enabling acquisition of samples from depths of several meters where if used on Mars would be beyond the oxidized and sterilized zone. For this purpose, we developed a rotary-hammering coring drill, called Auto-Gopher, which employs a piezoelectric actuated percussive mechanism for breaking formations and an electric motor that rotates the bit to remove the powdered cuttings. This sampler is a wireline mechanism that can be fed into and retrieved from the drilled hole using a winch and a cable. It includes an inchworm anchoring mechanism allowing the drill advancement and weight on bit control without twisting the reeling and power cables. The penetration rate is being optimized by simultaneously activating the percussive and rotary motions of the Auto-Gopher. The percussive mechanism is based on the Ultrasonic/Sonic Drill/Corer (USDC) mechanism that is driven by piezoelectric stack and that was demonstrated to require low axial preload. The design and fabrication of this device were presented in previous publications. This paper presents the results of laboratory and field tests and lessons learned from this development.
Document ID
20150007429
Document Type
Conference Paper
External Source(s)
Authors
Badescu, Mircea (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ressa, Aaron (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jae Lee, Hyeong (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bar-Cohen, Yoseph (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sherrit, Stewart (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zacny, Kris (Honeybee Robotics Pasadena, CA, United States)
Paulsen, Gale L. (Honeybee Robotics Pasadena, CA, United States)
Beegle, Luther (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bao, Xiaoqi (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 6, 2015
Publication Date
March 10, 2013
Subject Category
Mechanical Engineering
Lunar and Planetary Science and Exploration
Meeting Information
SPIE Smart Structures and NDE Symposium(San Diego, CA)
Distribution Limits
Public
Copyright
Other
Keywords
piezoactuation
sampling
planetary sampling
auto-gophering
drilling