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11 to 20 of 28 Results
In-situ astrobiological exploration using an ultrasonic sampler and sensor platform based on the USDC
Mar 10, 2003
Bar-Cohen, Y.; Bao, X.; Chang, Z.; Sherrit, S., 2003, "In-situ astrobiological exploration using an ultrasonic sampler and sensor platform based on the USDC", https://hdl.handle.net/2014/6292, ['Life Detection: Mars and Beyond Workshop', 'Tempe, AZ, USA'], JPL Open Repository
No abstract provided
Numerical modeling of electroactive polymer mirrors for space applications
Mar 3, 2003
Bao, X.; Bar-Cohen, Y.; Chang, Z.; Sherrit, S., 2003, "Numerical modeling of electroactive polymer mirrors for space applications", https://hdl.handle.net/2014/6537, ['Smart Structures Symposium, EAP Actuators and Devices (EAPAD)', 'San Diego, CA, USA'], JPL Open Repository
A controllable mirror made of single-layer EAP mirror is proposed in this paper. An analytical solution of required voltage distribution for forming a parabolic mirror from a planar film is presented.
In-situ rock probing using the Ultrasonic/Sonic Driller/Corer (USDC)
Mar 3, 2003
Chang, Z.; Sherrit, S.; Bao, X.; Bar-Cohen, Y., 2003, "In-situ rock probing using the Ultrasonic/Sonic Driller/Corer (USDC)", https://hdl.handle.net/2014/6440, ['Smart Structures Symposium, EAP Actuators and Devices (EAPAD)', 'San Diego, CA, USA'], JPL Open Repository
Ability of in-situ sampling and analysis are important capabilities to allow meeting the major objectives of future NASA's planetary exploration missions.
Modeling of particle flow due to ultrasonic drilling
Mar 17, 2002
Bar-Cohen, Y.; Chang, Z.; Dolgin, B. P.; Bao, X.; Sheritt, S., 2002, "Modeling of particle flow due to ultrasonic drilling", https://hdl.handle.net/2014/13165, ['9th Annual International Sympsoium on Smart Structures', 'San Diego, CA, USA'], JPL Open Repository
No abstract provided
Analysis and simulation of the ultrasonic/sonic driller/corer (USDC)
Mar 17, 2002
Bar-Cohen, Y.; Bao, X.; Chang, Z.; Sheritt, S.; Dolgin, B. P.; Pal, D. S.; Du, S.; Peterson, T., 2002, "Analysis and simulation of the ultrasonic/sonic driller/corer (USDC)", https://hdl.handle.net/2014/13166, ['9th Annual International Symposium on Smart Structures', 'San Diego, CA, USA'], JPL Open Repository
No abstract provided
Optimal tune in ultrasonic drilling with body sensor
Oct 10, 2001
Bar-Cohen, Y.; Song, T.; Du, S.; Kroh, J.; Pal, D. S.; Krahe, R.; Peterson, T. M.; Sheritt, S.; Dolgin, B. P.; Bao, X.; Chang, Z., 2001, "Optimal tune in ultrasonic drilling with body sensor", https://hdl.handle.net/2014/13158, ['Ultrasonic Industry Association (UIA) Meeting', 'Atlanta, GA, USA'], JPL Open Repository
An Ultrasonic drilling/coring mechanism (USDC) has been developed for future NASA exploration missions.
Sample acquisition and analysis using the Ultrasonic/Sonic Driller/Corer (USDC)
May 14, 2001
Bar-Cohen, Y.; Sherrit, S.; Dolgin, B. P.; Bridges, N.; Bao, X.; Chang, Z.; Yen, A.; Saunders, R. S., 2001, "Sample acquisition and analysis using the Ultrasonic/Sonic Driller/Corer (USDC)", https://hdl.handle.net/2014/12402, ['Instrument Precision in Robotic Studies on the Martian Surface Workshop', 'Houston, Texas, USA'], JPL Open Repository
No abstract provided
Sample acquisition and in-situ analysis using the ultrasonic/sonic driller/corer (USDC) and robotic platforms
May 2, 2001
Sherrit, S.; Bar-Cohen, Y.; Dolgin, B. P.; Bridges, N.; Bao, X.; Chang, Z.; Yen, A.; Saunders, R. S.; Rainen, R. A.; Dawson, S. F., 2001, "Sample acquisition and in-situ analysis using the ultrasonic/sonic driller/corer (USDC) and robotic platforms", https://hdl.handle.net/2014/12746, ['The 6th International Symposium on Artificial Intelligence, Robotics, and Automation in Space', 'Montreal, Canada'], JPL Open Repository
Future NASA exploration missions to Mars, Europa, Titan, comets and asteroids are seeking to perform sampling, in-situ analysis and possibly return of material to Earth for further tests.
Composite Materials Stiffness Determination and Defects Characterization Using Leaky Lamb Wave (LLW) Dispersion Data
Dec 1, 1999
Bar-Cohen, Y.; Mal, A.; Lih, S. S.; Chang, Z., 1999, "Composite Materials Stiffness Determination and Defects Characterization Using Leaky Lamb Wave (LLW) Dispersion Data", https://hdl.handle.net/2014/16676, ['Journal of Intelligent Material Systems and Structures', 'USA'], JPL Open Repository
The Leaky Lamb wave (LLW) technique is approaching a maturity level that is making it an attractive quantitative NDE tool for composites and bonded joints.
Progress and Challenges to NDE of Composites Using Obliquely Insonified Ultrasonic Waves
Nov 14, 1999
Bar-Cohen, Y.; Lih, S. S.; Chang, Z., 1999, "Progress and Challenges to NDE of Composites Using Obliquely Insonified Ultrasonic Waves", https://hdl.handle.net/2014/17687, ['Recent Advances of Ultrasonic NDE', 'Nashville, TN, USA'], JPL Open Repository
The use of obliquely insonified ultrasonic waves has shown great promise in providing information about flaw characteristics and material properties of composite materials.
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