LISA Pathfinder platform stability and drag-free performance

Armano, M.; Audley, H.; Baird, J.; Binétruy, P.; Born, M.; Bortoluzzi, D.; Castelli, E.; Cavalleri, A.; Cesarini, A.; Cruise, A. M.; Danzmann, K.; Silva, M. de Deus; Diepholz, I.; Dixon, G. J.; Dolesi, R.; Ferraioli, L.; Ferroni, V.; Fitzsimons, E.; Freschi, M.; Gesa, L.; Gibert, F.; Giardini, Domenico; Giusteri, R.; Grimani, C.; Grzymisch, J.; Harrison, I.; Heinzel, Gerhard; Hewitson, M.; Hollington, D.; Hoyland, D.; Hueller, M.; Inchauspé, H.; Jennrich, O.; Jetzer, Philippe; Karnesis, Nikolaos; Kaune, B.; Korsakova, Natalia; Killow, C. J.; Lobo, J. A.; Lloro, I.; Liu, L.; López-Zaragoza, J. P.; Maarschalkerweerd, R.; Mance, D.; Meshksar, N.; Martín, Vicente; Martin-Polo, L.; Martino, J.; Martín-Porqueras, F.; Mateos, I.; McNamara, P. W.; Mendes, José F. G.; Mendes, L.; Nofrarias, M.; Paczkowski, S.; Perreur-Lloyd, M.; Pivato, P.; Plagnol, E.; Ramos‐Castro, J.; Reiche, J.; Robertson, D. I.; Rivas, F.; Russano, G.; Slutsky, J.; Sopuerta, Carlos F.; Sumner, T. J.; Texier, D.; Thorpe, James; Vetrugno, D.; Vitale, S.; Wanner, Gudrun; Ward, H.; Wass, Peter; Weber, William J.; Wissel, L.; Wittchen, A.; Zweifel, Peter

doi:10.1103/physrevd.99.082001

Cited by 51 publications

(37 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this is a requirement on the differential noise between two widely separated proof-masses forming a link, and it does not directly give the relative spatial noise behaviour of one proof-mass within its own spacecraft enclosure which will depend on the inherent platform stability, the local displacement measurement and the closed-loop drag-free performance used to control the spacecraft motion. This has been studied in detail for LISA Pathfinder [26] and we use results from that study to provide representative performance data. Figure 2 in [26] shows an amplitude spectral density between 0.05mHz and 30mHz which we approximate to The charge noise, S 1/2 Q to be used in equations 12, 14, 19 and 24 was first derived using Monte-Carlo simulations [19] but has since been modified by in-orbit measurements made by LISA Pathfinder [14].…”

Section: Amplitude Spectral Noise Distributions Within Electrostatic mentioning

confidence: 99%

“…This has been studied in detail for LISA Pathfinder [26] and we use results from that study to provide representative performance data. Figure 2 in [26] shows an amplitude spectral density between 0.05mHz and 30mHz which we approximate to The charge noise, S 1/2 Q to be used in equations 12, 14, 19 and 24 was first derived using Monte-Carlo simulations [19] but has since been modified by in-orbit measurements made by LISA Pathfinder [14]. The charging process is due to the interaction of cosmic-rays within the proof-mass and surrounding structures.…”

Section: Amplitude Spectral Noise Distributions Within Electrostatic mentioning

confidence: 99%

“…The requirement specification for measurement of relative proof-mass displacement within the spacecraft calls for 5nm/ √ Hz. The in-flight LISA Pathfinder platform stability performance, including the closed-loop drag-free, is shown in Figure 6 of [26]. The spacecraft acceleration curves recovered from the simulation have a characteristic 'V' shape which, for the relevant transverse axes, can be approximated to within a factor of two, to a functional form…”

Section: Amplitude Spectral Distributions Within Lorentz Force Noise mentioning

confidence: 99%

See 2 more Smart Citations

Charge induced acceleration noise in the LISA gravitational reference sensor

Sumner

Mueller

Conklin

et al. 2020

Class. Quantum Grav.

View full text Add to dashboard Cite

The presence of free charge on isolated proof-masses, such as those within spaceborne gravitational reference sensors, causes a number of spurious forces which will give rise to associated acceleration noise. A complete discusssion of each charge induced force and its linear acceleration noise is presented. The resulting charge acceleration noise contributions to the LISA mission are evaluated using the LISA Pathfinder performance and design. It is shown that one term is largely dominant but that a full budget should be maintained for LISA and future missions due to the large number of possible contributions and their dependence on different sensor parameters.

show abstract

Section: Amplitude Spectral Noise Distributions Within Electrostatic mentioning

confidence: 99%

Section: Amplitude Spectral Noise Distributions Within Electrostatic mentioning

confidence: 99%

Section: Amplitude Spectral Distributions Within Lorentz Force Noise mentioning

confidence: 99%

See 1 more Smart Citation

Charge induced acceleration noise in the LISA gravitational reference sensor

Sumner

Mueller

Conklin

et al. 2020

Class. Quantum Grav.

View full text Add to dashboard Cite

show abstract

“…e first one is the "accelerometer" drag-free mode, where an electrostatic accelerometer is used as the primary sensor and an electrostatic suspension actuator is paired to maintain the TM to be centred in its cage; therefore it can counter the disturbance forces acting on the spacecraft [7][8][9][10][11]. e second one is free-falling TM mode, in which the satellite provides indirect drag-free behaviour by tracking the movement of the free-falling TM in the cage [12][13][14][15]. In particular, the structure of a satellite with two cube TMs is always regarded as the primary layout in these missions, which makes the GRS be more complex and the control system design work be more challenging.…”

Section: Introductionmentioning

confidence: 99%

Relative Position Model Predictive Control of Double Cube Test-Masses Drag-Free Satellite with Extended Sliding Mode Observer

Wang

Zhang

et al. 2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The drag-free satellites, being space-borne ultrahigh precise measurement platforms, have played irreplaceable roles in a great number of space science missions such as navigation, earth science, fundamental physics, and astrophysics. Most of these missions have to be performed based on the satellites placed with double cube test-masses, which makes the satellite layout and control strategy be more complex. This paper investigates the orbit keeping control problem of a class of low Earth orbit drag-free satellites with double cube test masses. A disturbance observer-based composite control method is proposed, which consists of an extended sliding mode observer and the tube-based robust model predictive control approach. In this design, the observer is proposed to estimate the relative position and velocity of the satellite and the external space disturbance force. A tube-based robust model predictive control scheme is then developed to stabilize the satellite orbit control systems in the presence of actuator saturation, state constraints, and additive stochastic noises. Finally, a simulation example is presented to demonstrate the efficacy and superiority of the proposed orbit control method.

show abstract

“…They have been used in space based applications in areas such as science, metrology and geodesy [1,2]. One recent example was the optical bench for the European Space Agency LISA Pathfinder mission (LPF) [3,4] for which specially developed alignment and bonding techniques were used to construct the flight hardware [5]. For LPF, fused-silica optics were hydroxide catalysis bonded [6] to a Zerodur baseplate to form multiple interferometers.…”

Section: Introductionmentioning

confidence: 99%

Automated precision alignment of optical components for hydroxide catalysis bonding

et al. 2018

View full text Add to dashboard Cite

We describe an interferometric system that can measure the alignment and separation of a polished face of a transparent optical component and an adjacent polished surface. Accuracies achieved are ∼ 1µrad for the relative angles in two orthogonal directions and ∼ 30µm in separation. We describe the use of this readout system to automate the process of hydroxide catalysis bonding of a fused-silica component to a fused-silica baseplate. The complete alignment and bonding sequence was typically achieved in a timescale of a few minutes, followed by an initial cure of 10 minutes. A series of bonds were performed using two fluids-a simple sodium hydroxide solution and a sodium hydroxide solution with some sodium silicate solution added. In each case we achieved final bonded component angular alignment within 10 µrad and position in the critical direction within 4 µm of the planned targets. The small movements of the component during the initial bonding and curing phases were monitored. The bonds made using the sodium silicate mixture achieved their final bonded alignment over a period of ∼ 15 hours. Bonds using the simple sodium hydroxide solution achieved their final alignment in a much shorter time of a few minutes. The automated system promises to speed the manufacture of precision-aligned assemblies using hydroxide catalysis bonding by more than an order of magnitude over the more manual approach used to build the optical interferometer at the heart of the recent ESA LISA Pathfinder technology demonstrator mission. This novel approach will be key to the time-efficient and low-risk manufacture of the complex optical systems needed for the forthcoming ESA spaceborne gravitational waves observatory mission, provisionally named LISA.

show abstract

LISA Pathfinder platform stability and drag-free performance

Cited by 51 publications

References 30 publications

Charge induced acceleration noise in the LISA gravitational reference sensor

Charge induced acceleration noise in the LISA gravitational reference sensor

Relative Position Model Predictive Control of Double Cube Test-Masses Drag-Free Satellite with Extended Sliding Mode Observer

Automated precision alignment of optical components for hydroxide catalysis bonding

Contact Info

Product

Resources

About