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HP3 Instrument Support System Structure development for the NASA/JPL Mars Mission InSight

Spröwitz, Tom and Reershemius, Siebo and Wippermann, Torben and Spohn, Tilman and Hudson, T.L. and Sasaki, Kaname and Fittock, Mark and Scharringhausen, Marco (2019) HP3 Instrument Support System Structure development for the NASA/JPL Mars Mission InSight. In: IEEE Aerospace Conference Proceedings. IEEE Aerospace Conference, 03.-08. März 2019, Big Sky, USA. doi: 10.1109/AERO.2019.8742104.

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On May 05, 2018 NASA JPL launched its mission to Mars called “InSight”. Main objective of this mission is to gain more knowledge about the evolution of terrestrial planets and to more precisely determine properties of core, mantle and crust of Mars. One of a number of different scientific instruments onboard the lander there will be HP3 (Heat Flow and Physical Properties Package), which was developed by the German Aerospace Center (DLR). It will be operated on Martian ground to measure the heat flow through the Martian outer crust. It uses a hammering mechanism which will pull a tether approx. 5 m into the soil. The hammering device is equipped with foil heaters on the outer hull and the tether is equipped with temperature elements. Both is needed for the determination of the thermal conductivity of the surrounding regolith and the measurement of the temperature gradients in the ground. There is the need of a separate system to be able to perform those activities on the surface. This system is called the “HP3 Support System”. Its main task is to ensure a stable, nearly perpendicular position of the hammering mechanism relative to the soil on the Martian surface before initial penetration. It furthermore houses the instruments for length measurement and serves as electrical connection to the lander. The paper will give an overview of the development and the qualification of the structure of the Support System. It will focus on the mechanical design, the analysis of the structural dynamics but in particular on the testing which includes standard environmental testing but also numerous development tests that are very mission specific. The mechanical design of the Support System is mainly driven by a unique set of requirements derived from the working environment on Mars, the deployment from the lander deck and the mechanically separated operation on the surface. The instrument design will be explained to show, which design elements were implemented to ensure proper functionality. Various development tests had to be performed during the Support System structure development. Besides the standard qualification tests, special tests were developed to show compliance of the instrument design to the requirements. Such tests are: Separation Tests from the lander deck in cold environment under various tilt angles, Tether Deployment Tests, under various temperatures, foldings and routings, Feet Sliding Resistance Tests on sand with different slopes. The paper will give an overview on all tests necessary for the support system qualification and will describe test setups and the results.

Item URL in elib:https://elib.dlr.de/126842/
Document Type:Conference or Workshop Item (Speech)
Title:HP3 Instrument Support System Structure development for the NASA/JPL Mars Mission InSight
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Spröwitz, TomUNSPECIFIEDhttps://orcid.org/0000-0001-5369-6919UNSPECIFIED
Wippermann, TorbenUNSPECIFIEDhttps://orcid.org/0000-0002-0354-6557UNSPECIFIED
Hudson, T.L.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USAUNSPECIFIEDUNSPECIFIED
Sasaki, KanameUNSPECIFIEDhttps://orcid.org/0000-0003-0365-4539UNSPECIFIED
Date:March 2019
Journal or Publication Title:IEEE Aerospace Conference Proceedings
Refereed publication:Yes
Open Access:No
In ISI Web of Science:No
Keywords:InSight, Mars, heat flow, physical properties package, Support System, development testing, environmental testing
Event Title:IEEE Aerospace Conference
Event Location:Big Sky, USA
Event Type:international Conference
Event Dates:03.-08. März 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project InSight - HP3
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Mechanic and Thermal Systems
Institute of Space Systems > Land and Exploration Technology
Institute of Planetary Research
Deposited By: Spröwitz, Tom
Deposited On:20 Mar 2019 12:39
Last Modified:21 Jul 2023 11:25

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