Dr. Conor D. Johnson Profile

Dr. Conor D. Johnson

President and Sales Representative at Moog CSA Engineering

SPIE Involvement:

Author

Proceedings Article | 27 June 2002 Paper

Whole-spacecraft shock isolation system

Conor Johnson, Paul Wilke

Proceedings Volume 4697, (2002) https://doi.org/10.1117/12.472644

KEYWORDS: Space operations, Optical isolators, Satellites, Vibration isolation, Analytical research, Signal attenuation, Electronics, Navigation systems, Control systems, Data modeling

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Proceedings Article | 2 July 2001 Paper

Multi-axis whole-spacecraft vibration isolation for small launch vehicles

Conor Johnson, Paul Wilke, Kenneth Darling

Proceedings Volume 4331, (2001) https://doi.org/10.1117/12.432699

KEYWORDS: Space operations, Vibration isolation, Optical isolators, Satellites, Manufacturing, Signal attenuation, Performance modeling, Dynamical systems, Data acquisition, Acoustics

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Proceedings Article | 27 April 2000 Paper

Whole-spacecraft vibration isolation on small launch vehicles

Paul Wilke, Conor Johnson, Patrick Grosserode, Dino Sciulli

Proceedings Volume 3989, (2000) https://doi.org/10.1117/12.384584

KEYWORDS: Space operations, Optical isolators, Vibration isolation, Signal attenuation, Analytical research, Acoustics, Manufacturing, Structural design, Dynamical systems, Control systems

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Small launch vehicles historically provide a very rough ride to spacecraft during launch. This is particularly true of solid-fueled launch vehicles. In order for the spacecraft to survive such a trip to orbit, one of two choices must be made: (1) design all structure, payloads, and systems on the spacecraft to be strong enough to survive the high launch loads, or (2) reduce the magnitude of the high launch loads. The former is not a good choice because it typically requires additional cost, schedule, and weight. The latter is the preferred choice because it allows the focus of the spacecraft design to be primarily for on-orbit performance rather that for launch survival. Under a number of contrasts from the Air Force Research Laboratory, Space Vehicles Directorate, whole- spacecraft vibration isolation systems have been in development since 1993. This work has resulted in two whole- spacecraft isolation systems (SoftRide) that have been flown on Taurus launch vehicles, the first in February 1998 with the GFO spacecraft and the second in October 1998 with the STEX spacecraft. Both of these isolation systems were designed primarily to reduce axial dynamic responses on the spacecraft due to resonant burn excitations from the motors of the solid- fueled booster. Full coupled-loads analyses were used to predict the performance of the SoftRide systems. Using the isolation requirements derived from these analyses, hardware having the correct damping and stiffness was designed to implement the isolation system. All isolation system components were extensively tested and characterized. Typical results show 85% attenuation (i.e., only 15% of original) for the worst case resonant burn condition and 59% attenuation for a combination of static plus worst case resonant burn condition in the axial spacecraft c.g. location. No detrimental effects from the SoftRide system were observed. Limited flight data from the two flights agree with the predictions. SoftRide systems are now under development for the first and second OSP launches and for the Taurus/MTI launch. Additionally, isolation systems are being designed for larger liquid-fueled launch vehicles. This isolation system technology will greatly further the goal of better, faster, cheaper, and lighter spacecraft.

Proceedings Article | 2 June 1999 Paper

Whole-spacecraft vibration isolation system for the GFO/Taurus mission

Conor Johnson, Paul Wilke, Patrick Grosserode

Proceedings Volume 3672, (1999) https://doi.org/10.1117/12.349780

KEYWORDS: Space operations, Optical isolators, Vibration isolation, Systems modeling, Analytical research, Rockets, Solids, Control systems, Linear filtering, Data modeling

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Proceedings Article | 16 June 1998 Paper

Analysis, design, and testing of two cocured damped composite torsion shafts

Kevin Napolitano, Wilder Grippo, John Kosmatka, Conor Johnson

Proceedings Volume 3327, (1998) https://doi.org/10.1117/12.310716

KEYWORDS: Composites, Analytical research, Information operations, Chlorine, Electroluminescence, Manufacturing, Radon, Finite element methods, Silicon, Scanning electron microscopy

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Proceedings Article | 9 May 1997 Paper

Development of a launch vibration isolation system

Donald Edberg, Conor Johnson, L. Porter Davis, Eugene Fosness

Proceedings Volume 3045, (1997) https://doi.org/10.1117/12.274216

KEYWORDS: Space operations, Vibration isolation, Optical isolators, Signal attenuation, Satellites, Control systems, Actuators, Aerodynamics, Acoustics, Solids

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Proceedings Article | 9 May 1997 Paper

Payload isolation system for launch vehicles

Paul Wilke, Conor Johnson, Eugene Fosness

Proceedings Volume 3045, (1997) https://doi.org/10.1117/12.274215

KEYWORDS: Space operations, Optical isolators, Satellites, Finite element methods, Vibration isolation, Analytical research, Satellite communications, Mathematical modeling, Data modeling, Prototyping

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Proceedings Article | 9 May 1997 Paper

Need for and benefits of launch vibration isolation

Andrew Bicos, Conor Johnson, L. Porter Davis

Proceedings Volume 3045, (1997) https://doi.org/10.1117/12.274214

KEYWORDS: Space operations, Reliability, Satellites, Optical isolators, Acoustics, Vibration isolation, Manufacturing, Structural design, Aerodynamics, Satellite communications

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Proceedings Article | 1 May 1996 Paper

Cocured viscoelastic composites

Joseph Maly, Conor Johnson

Proceedings Volume 2720, (1996) https://doi.org/10.1117/12.239104

KEYWORDS: Composites, Foam, Finite element methods, Material characterization, Adhesives, Temperature metrology, Structural design, Manufacturing, Chemical elements, Epoxies

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Proceedings Article | 5 May 1995 Paper

Passive damping technology demonstration

Robert Holman, Susan Spencer, Eric Austin, Conor Johnson

Proceedings Volume 2445, (1995) https://doi.org/10.1117/12.208888

KEYWORDS: Finite element methods, Analytical research, Reliability, Manufacturing, Hardware testing, Temperature metrology, Adhesives, Satellites, Product engineering, Antennas

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Showing 5 of 10 publications

SPIE Conference Volume | 1 May 1996

Smart Structures and Materials 1996: Passive Damping and Isolation

SPIE Conference Volume | 5 May 1995

Smart Structures and Materials 1995: Passive Damping

SPIE Conference Volume | 1 May 1994

Smart Structures and Materials 1994: Passive Damping

Conference Committee Involvement (17)

Active and Passive Smart Structures and Integrated Systems X

21 March 2016 | Las Vegas, Nevada, United States

Active and Passive Smart Structures and Integrated Systems IX

9 March 2015 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems VIII

10 March 2014 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems VII

10 March 2013 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems VI

12 March 2012 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems V

7 March 2011 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems IV

8 March 2010 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems III

9 March 2009 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems II

10 March 2008 | San Diego, California, United States

Active and Passive Smart Structures and Integrated Systems

19 March 2007 | San Diego, California, United States

Damping and Isolation

27 February 2006 | San Diego, California, United States

Damping and Isolation

7 March 2005 | San Diego, California, United States

Damping and Isolation

15 March 2004 | San Diego, CA, United States

Damping and Isolation

3 March 2003 | San Diego, California, United States

Smart Structures and Materials 1996: Passive Damping and Isolation

26 February 1996 | San Diego, CA, United States

Passive Damping

1 March 1995 | San Diego, CA, United States

Smart Structures and Materials 1994: Passive Damping

14 February 1994 | Orlando, FL, United States

Showing 5 of 17 Conference Committees

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