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Structure Development of the HP3 Instrument Support System for the Mars Mission InSight

Reershemius, Siebo and Fittock, Mark and Sasaki, Kaname and Scharringhausen, Marco and Spohn, Tilman and Spröwitz, Tom and Wippermann, Torben and Hudson, T.L. (2018) Structure Development of the HP3 Instrument Support System for the Mars Mission InSight. In: Proceedings of the International Astronautical Congress, IAC. 69th International Astronautical Congress, 01.-05. Okt. 2018, Bremen.

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Abstract

On May 05, 2018 NASA JPL launched its mission to Mars called “InSight”. Main objective of this mission is to gain more knowledge of the evolution of terrestrial planets. Beside a number of different scientific instruments onboard the lander there are two instruments that will perform measurements on the Martian ground. One of the instruments is HP3 (Heat Flow and Physical Properties Package), which was developed by the German Aerospace Center (DLR) to measure the heat flow of the Martian outer crust. It uses a hammering mechanism equipped with heating foils on the outer hull to pull a tether approx. 5 m into the soil. The tether is equipped with temperature elements for the determination of 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 qualification 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 and the “Cold Drop and Dig test”, which covers the initial hammering phase of the Mole. 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/127099/
Document Type:Conference or Workshop Item (Speech)
Title:Structure Development of the HP3 Instrument Support System for the Mars Mission InSight
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reershemius, SieboSiebo.Reershemius (at) dlr.deUNSPECIFIED
Fittock, MarkMark.Fittock (at) dlr.deUNSPECIFIED
Sasaki, KanameKaname.Sasaki (at) dlr.deUNSPECIFIED
Scharringhausen, MarcoMarco.Scharringhausen (at) dlr.deUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Spröwitz, TomTom.Sproewitz (at) dlr.dehttps://orcid.org/0000-0001-5369-6919
Wippermann, TorbenTorben.Wippermann (at) dlr.dehttps://orcid.org/0000-0002-0354-6557
Hudson, T.L.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USAUNSPECIFIED
Date:3 October 2018
Journal or Publication Title:Proceedings of the International Astronautical Congress, IAC
Refereed publication:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:InSight, HP3, DLR, JPL, Mole, Support System
Event Title:69th International Astronautical Congress
Event Location:Bremen
Event Type:international Conference
Event Dates:01.-05. Okt. 2018
Organizer:International Astronautical Federation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):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 Space Systems > Transport and Propulsion System
Deposited By: Spröwitz, Tom
Deposited On:09 Apr 2019 10:29
Last Modified:24 Apr 2019 09:23

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