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Percussive Augmenter of Rotary Drills (PARoD)
External Online Source: hdl:2014/42456
Author and Affiliation:
Badescu, Mircea(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);
Bao, Xiaoqi(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Chang, Zensheu(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Donnelly, Chris(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Aldrich, Jack(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Abstract: Increasingly, NASA exploration mission objectives include sample acquisition tasks for in-situ analysis or for potential sample return to Earth. To address the requirements for samplers that could be operated at the conditions of the various bodies in the solar system, a piezoelectric actuated percussive sampling device was developed that requires low preload (as low as 10N) which is important for operation at low gravity. This device can be made as light as 400g, can be operated using low average power, and can drill rocks as hard as basalt. Significant improvement of the penetration rate was achieved by augmenting the hammering action by rotation and use of a fluted bit to provide effective cuttings removal. Generally, hammering is effective in fracturing drilled media while rotation of fluted bits is effective in cuttings removal. To benefit from these two actions, a novel configuration of a percussive mechanism was developed to produce an augmenter of rotary drills. The device was called Percussive Augmenter of Rotary Drills (PARoD). A breadboard PARoD was developed with a 6.4 mm (0.25 in) diameter bit and was demonstrated to increase the drilling rate of rotation alone by 1.5 to over 10 times. Further, a large PARoD breadboard with 50.8 mm diameter bit was developed and its tests are currently underway. This paper presents the design, analysis and preliminary test results of the percussive augmenter.
Publication Date: Mar 12, 2012
Document ID:
20130001781
(Acquired Jan 18, 2013)
Subject Category: GEOPHYSICS
Document Type: Conference Paper
Meeting Information: SPIE Smart Structures and Materials/NDE Symposium; 11-15 Mar. 2012; San Diego, CA; United States
Meeting Sponsor: International Society for Optical Engineering; United States
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 8p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: DRILLS; FRACTURING; PIEZOELECTRICITY; BASALT; ROCKS; DESIGN ANALYSIS; SAMPLE RETURN MISSIONS; PENETRATION; PRESTRESSING
Other Descriptors: DRILLING; PLANETARY SAMPLING; PIOZOELECTRIC ACUTATION; PERCUSSIVE AUGMENTER
Availability Source: Other Sources
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