|7:30 am Registration
Tutorial Co-Chair: Hadi Navid, The Johns Hopkins University -
Tutorial Co-Chair: Nabil Copty, SIERRA LOBO, Inc.- Goddard Space Flight Center
Session 1 - Current and Future State of Mass Property Measurement for Space Applications
Instructor: Robin Miller
Space Electronics Inc., LLC
Space Vehicles require an absolute understanding of their Mass Properties to function properly (Center of Gravity, Moment of Inertia and Product of Inertia), and present unique challenges to that Industry to test. The current State-of-the-Art machines are very capable of measuring ground-situated atmospheric devices, but a multitude of factors must be understood and applied to account for operation in a Space Environment. There are both Direct Measurement Machines and Analysis Factors currently being developed specifically for the Space Industry, including vacuum testing, attitude control verification and full thruster characterization. Future extension of this knowledge would enable post-launch capability to characterize actual deployed mass properties, including damaged satellites, for best fuel utilization.
Robin Miller is the Chief Engineer at Space Electronics Inc., LLC in Berlin, CT. SPACE Electronics manufactures the Industry Leading Mass Properties machines and Igniter Circuit Testers. He has previously worked in the fields of Jet Engine Development (Pratt and Whitney-F35, ATEC-Black Hawk), Elevator Design (Otis Elevator), Helicopter Transmissions and Lift Control (Sikorsky), Flywheel Mechanical Energy Storage and Electric Vehicle Propulsion (United Technologies Research Center), Automotive User Interface (United Technologies Automotive), Actuation (Hamilton Sundstrand and UTRC) and the Residential and Commercial Lighting Control Industry (Lutron Electronics) in addition to being a Lab Mentor and Guest Lecturer with the MIT Mechanical Engineering Department. He holds 39 patents in various technology fields.
Session 2 - Design of UHV Space Simulation Chambers
Instructors: Dominik Schwendt
Pfeiffer Vacuum, Göttingen, Germany
This tutorial gives an overview on the design of vacuum chambers for space simulation applications with a focus on choice of materials, surface finishes, etc., while showing examples of an existing system at ZARM Technik AG.
This topic will give insights on the thermal treatment for heavy objects, which requires modifications of the standard spherical design. A shroud for this purpose ideally has an open bottom that allows mounting a table on rails inside the chamber. Here the table needs to be temperature controlled itself to keep the overall temperature of the samples at a constant level. At the same time this design allows to use different thermal fluids for the table and therefore the sample compared the shroud itself.
The tutorial will also show general aspects that should be taken into account planning a UHV (ultra-high vacuum) space simulation chamber, like choice of pumps, overall design aspects such as view ports, spare flanges, size and therefore weight of the shroud, and many other subjects.
Dominik Schwendt received his education in Physics and Material Sciences at University Hannover. He was the Leading Scientist of MBE Laboratory in Hannover prior to becoming a Project Manager at Pfeiffer Vacuum in Gottingen, Germany. In 2014, he received the Cray-Prize for Junior Scientists and has presented more than 15 scientific presentations at international conferences.
Session 3 - Introduction to MIL-STD-1540E
"Test Requirements for Launch, Upper-Stage, and Space Vehicles"
Instructors: James M. Snyder
Senior Engineering Specialist
The Aerospace Corporation
The tutorial includes an overview of the rationale for ground testing and the criteria leading to the specified requirements that provide a foundation for building a thorough and effective environmental test program. It emphasizes the importance of a rigorous and perceptive test program, and how a space system's mission success is enhanced as a result. The tutorial will focus on the thermal cycle and thermal vacuum test requirements.
Test philosophy, criteria, and approaches will be presented and reinforced using historical data and lessons learned. It will also provide a status of the B revision to MIL-HDBK-340 currently in work.
Jim Snyder is a Senior Engineering Specialist in The Aerospace Corporation's Environments, Test and Assessment Department. He joined Douglas Aircraft Company as a Structural Test Engineer after receiving his BSME from Cal Poly Pomona in 1967. Snyder became a manager in 1980 and led the Test Engineering team for several years. In 1991 he assumed the responsibilities of Senior Manager of the Engineering Labs at Boeing. In April of 2004, Snyder retired from Boeing and assumed his current position at The Aerospace Corporation where he has been involved in various projects including updating MIL-STD-1540, authoring sections of two new Aerospace handbooks, and consulting on several military, civil and commercial satellite test programs. Jim has also created a website that is currently being populated with laboratory test facility data, the Space Systems Environmental Test Facility Database (SSETFD) www.ssetfd.org.
Session 4 - Laser Doppler Vibrometry, Use and Theory
Instructor: David Oliver
Chief Technical Officer
Laser Doppler Vibrometry (LDV) is widely used in aerospace and other related industries for non contact vibration evaluation. LDV technology is continuing to revolutionize the measurement of structural vibration and shock. This tutorial is tailored to engineers and technicians looking to obtain a general understanding of Laser Doppler Vibrometry theory and application as it relates to aerospace and environmental testing. Example measurements data will be presented that exemplify use of this technology for testing different devices and assemblies. Scanning Vibrometry examples will demonstrate full-field measurement and operational deflection shapes of both 1D and 3D surface vibrations in simulated space environments.
The tutorial will cover examples of where LDV offers technical and economic benefits, such as in: modal analysis, FEM validation, dynamics characterization, smart structures research, structural health monitoring, production quality testing, strain measurement and more.
- Concept and theory of Laser Doppler Vibrometry (LDV)
- Technical advantages and limitations
- Productivity benefits
- Product types - including: single point, scanning and specialty vibrometers
David Oliver graduated with honors from the University of Leicester, England in 1977 in Physics and has over 30 years of experience in Laser Doppler Vibrometry. He is credited with introducing scanning laser vibrometers into commercialization in the 1980's and is currently the Chief Technical Officer and VP of Business Development at Polytec, located in Massachusetts.
Question-Answer Discussions to Follow Each Session