Development of a Highly Precise Micronewton Thrust Balance

In this paper, we present our ongoing micronewton thrust balance development, which fulfils the laser interferometer space antenna requirements. In the context of the development of highly precise thrusters for attitude control of satellites for future space missions, test facilities for the characterization and qualification of thrusters need to be developed in parallel. The presented thrust balance has a resolution of 0.1 μN in a bandwidth between 1 and 10-3 Hz. As a general measurement principle, we chose a pendulum balance. The setup consists of two pendulums to enable a common mode rejection. To suppress the eigenfrequency of the pendulums, a damping system based on an eddy current brake is part of the balance assembly. A heterodyne laser interferometer is used as the translation sensor. Different measurements were performed to investigate the noise performance of the pendulum. The results are presented and analyzed. The measurement system was used to measure the thrust of a micro-high efficiency multistage plasma thruster.

[1]  Carlo Menon,et al.  FEEP micro-thrust balance characterization and testing , 2006 .

[2]  Martin Gohlke,et al.  Interferometric characterization and modeling of pathlength errors resulting from beamwalk across mirror surfaces in LISA. , 2013, Applied optics.

[3]  Kurt A. Polzin,et al.  Thrust stand for vertically oriented electric propulsion performance evaluation , 2010 .

[4]  Thomas W. Haag.  Thrust stand for pulsed plasma thrusters , 1997 .

[5]  Andrew D. Ketsdever,et al.  Gas dynamic calibration of a nano-Newton thrust stand , 2002 .

[6]  G. Noci,et al.  Thrust Measurements of the Gaia Mission Flight-Model Cold Gas Thrusters , 2014 .

[7]  H. Seifert,et al.  Rocket Propulsion Elements , 1963 .

[9]  Claus Braxmaier,et al.  Feasibility of a down-scaled HEMP-Thruster , 2011 .

[10]  Kurt A. Polzin,et al.  Thrust stand for electric propulsion performance evaluation , 2004 .

[11]  Andrew D. Ketsdever,et al.  Comparison of force balance calibration techniques for the nano-Newton range , 2003 .

[12]  Juergen Mueller,et al.  Thruster Optins for Microspacecraft: A Review and Evaluation of Existing Hardware and Emerging Technologies , 1997 .

[13]  M. Tajmar,et al.  Overview of Indium LMIS for the NASA-MMS Mission and its Suitability for an In-FEEP Thruster on LISA , 2011 .

[14]  Juergen Mueller.  Thruster Options for Microspacecraft : A Review and Evaluation of Existing Hardware and Emerging Technologies , 1997 .

[15]  Ulrich Johann,et al.  Parametric Study of HEMP-Thruster Downscaling to $ {\mu }$ N Thrust Levels , 2015, IEEE Transactions on Plasma Science.