21 to 30 of 62 Results
Apr 11, 2016
Bar-Cohen, Yoseph; Zacny, Kris; Badescu, Mircea; Lee, Hyeong Jae; Sherrit, Stewart; Bao, Xiaoqi; Paulsen, Gale L.; Beegle, Luther, 2016, "The Auto-Gopher: a wireline rotary-percussive deep sampler", https://hdl.handle.net/2014/45800, ASCE Earth and Space 2016 Conference, Orlando, Florida, April 11-15, 2016, JPL Open Repository
The Auto-Gopher was developed to access regions on planetary bodies that potentially preserve biosignatures or are presently habitable that are vital to meeting search for life exploration objectives. |
Mar 20, 2016
Badescu, Mircea; Sherritt, Stewart; Lewis, Derek; Bao, Xiaoqi; Bar-Cohen, Yoseph; Hall, Jeffrey L., 2016, "Digital valve for high pressure high flow applications", https://hdl.handle.net/2014/46058, SPIE Smart Structures/NDE 2016, Las Vegas, Nevada, March 20-24, 2016, JPL Open Repository
To address the challenges, which are involved with the development of flow control valves that can meet the requirements of deep oil wells such as high pressure, high flow rate, limited power and limited space, the authors have conceived a novel design configuration [1]. This des... |
Mar 8, 2015
Bao, Xiaoqi; Badescu, Mircea; Bar-Cohen, Yoseph, 2015, "Thermal analysis of brazing seal and sterilizing technique to break contamination chain for Mars sample return", https://hdl.handle.net/2014/45712, SPIE Smart Structures, San Diego, California, March 8-12, 2015, JPL Open Repository
The results show that the sealing and sterilization process can be controlled such that the samples' temperature is maintained below the potentially required level. |
Mar 8, 2015
Bar-Cohen, Yoseph; Sherrit, Stewart; Bao, Xiaoqi; Badescu, Mircea; Lee, Hyeong Jae; Walkenmeyer, Phillip; Lih, Shyh-Shiuh, 2015, "Actuators using piezoelectric stacks and displacement enhancers", https://hdl.handle.net/2014/45715, SPIE Smart Structures, San Diego, California, March 8-12, 2015, JPL Open Repository
The developed actuators and performance will be described and discussed in this paper. |
Mar 9, 2014
Badescu, Mircea; Bao, Xiaoqi; Bar-Cohen, Yoseph, 2014, "Shape memory alloy (SMA)-based launch lock", https://hdl.handle.net/2014/45484, SPIE Smart Structures and Non-Destructive Evaluation, San Diego, California, March 9-13, 2014, JPL Open Repository
Most NASA missions require the use of a launch lock for securing moving components during the launch or securing the payload before release. A launch lock is a device used to prevent unwanted motion and secure the controlled components. The current launch locks are based on pyrot... |
Mar 18, 2013
Sherrit, Stewart; Walkemeyer, Phillip; Bao, Xiaoqi; Bar-Cohen, Yoseph; Badescu, Mircea, 2013, "Acoustic mechanical feedthroughs", https://hdl.handle.net/2014/44126, 44th Lunar and Planetary Science Conference (LPSC 2013), Woodlands, Texas, March, 18–22, 2013, JPL Open Repository
Electromagnetic motors can have problems when operating in extreme environments. In addition, if one needs to do mechanical work outside a structure, electrical feedthroughs are required to transport the electric power to drive the motor. In this paper, we present designs for dri... |
Mar 11, 2013
Lih, Shyh-Shiuh; Bar-Cohen, Yoseph; Lee, Hyeong Jae; Badescu, Mircea; Bao, Xiaoqi; Sherrit, Stewart; Takano, Nobuyuki; Ostlund, Patrick; Blosiu, Julian, 2013, "High temperatures health monitoring of the condensed water height in steam pipe systems", https://hdl.handle.net/2014/44130, SPIE Smart Structures and NDE Symposium, San Diego, California, March 10-14, 2013, JPL Open Repository
Ultrasonic probes were designed, fabricated and tested for high temperature health monitoring system. The goal of this work was to develop the health monitoring system that can determine the height level of the condensed water through the pipe wall at high temperature up to 250 °... |
Mar 11, 2013
Badescu, Mircea; Ressa, Aaron; Jae Lee, Hyeong; Bar-Cohen, Yoseph; Sherrit, Stewart; Zacny, Kris; Paulsen, Gale L.; Beegle, Luther; Bao, Xiaoqi, 2013, "Auto-Gopher : a wireline deep sampler driven by piezoelectric percussive actuator and EM rotary motor", https://hdl.handle.net/2014/44140, SPIE Smart Structures and NDE Symposium, San Diego, California, March 10-14, 2013, JPL Open Repository
The 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 sam... |
Mar 11, 2013
Lih, Shyh-Shiuh; Bar-Cohen, Yoseph; Lee, Hyeong Jae; Takano, Nobuyuki; Bao, Xiaoqi, 2013, "Advanced signal processing for high temperatures health monitoring of condensed water height in steam pipes", https://hdl.handle.net/2014/44129, SPIE Smart Structures and NDE Symposium, San Diego, California, March 10-14, 2013, JPL Open Repository
An advanced signal processing methodology is being developed to monitor the height of condensed water thru the wall of a steel pipe while operating at temperatures as high as 250°C. Using existing techniques, previous study indicated that, when the water height is low or there is... |
Mar 11, 2013
Badescu, Mircea; Hasenoehrl, Jennifer; Bar-Cohen, Yoseph; Sherrit, Stewart; Bao, Xiaoqi; Chang, Zensheu; Ostlund, Patrick; Aldrich, Jack, 2013, "Percussive augmenter of rotary drills (PARoD)", https://hdl.handle.net/2014/44138, SPIE Smart Structures and NDE Symposium, San Diego, California, March 10-14, 2013, JPL Open Repository
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 piezoele... |
