Updates on HRF Payloads Operations in Columbus ATCS

Depalo, Savino; Wright, Bruce D.; La, Ese; Challis, Simon; Davenport, Robert; Pietrafesa, Donata

doi:10.2514/6.2011-5005

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Standard interface racks are designed around the concept of providing a set of common interfaces for modular experiments [ 4 ]. Expedite the Processing of Experiments to Space Station (EXPRESS) racks are the most widely used SIR, and provide accommodation and facilitates operations for microgravity-based research payloads on the ISS [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…The stability of the PID algorithm and the system stability when the control parameters change were verified by comparison with ground experiment, simulation, and flight data [ 17 ]. The thermal control system in the Human Research Facility (HRF) experiment rack, which was developed by NASA, has three internal flowrate controllers that use a modulated solenoid valve, flow meter, and a dedicated PID controller [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Analysis and Intelligent Control Strategy for the Internal Thermal Control Fluid Loop of Scientific Experimental Racks in Space Stations

Cai

Wei

et al. 2020

Entropy

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Scientific experimental racks are an indispensable supporter in space stations for experiments with regard to meeting different temperature and humidity requirements. The diversity of experiments brings enormous challenges to the thermal control system of racks. This paper presents an indirect coupling thermal control single-phase fluid loop system for scientific experimental racks, along with fuzzy incremental control strategies. A dynamic model of the thermal control system is built, and three control strategies for it, with different inputs and outputs, are simulated. A comparison of the calculated results showed that pump speed and outlet temperature of the cold plate branch are, respectively, the best choice for the control variable and controlled variable in the controller. It showed that an indirect coupling thermal control fluid loop system with a fuzzy incremental controller is feasible for the thermal control of scientific experimental racks in space stations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis and Intelligent Control Strategy for the Internal Thermal Control Fluid Loop of Scientific Experimental Racks in Space Stations

Cai

Wei

et al. 2020

Entropy

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“…In order to evaluate Venturi sensor readings accuracy it was taken the advantage of HRF 1&2 flow measurements retrieved for CRS5 to CRS6 upgrade verification 7 , to check the approach for P/Ls flow rate measurement using the WPA delta flow rate. It was finally noticed that this result for P/L's activation was mainly related to the fact that time frames selected to compute mean values were large enough (in this case higher than 7 minutes) over a stable range and at the same Plenum Delta Pressure (42.7 kPa).…”

Section: F Hrfs Measurement On Mass Flow Ratementioning

confidence: 99%

Columbus Payloads Flow Rate Anomalies

Quaranta

Bufano

Depalo

et al. 2011

41st International Conference on Environmental Systems

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ESAThe Columbus Active Thermal Control System (ATCS) is the main thermal bus for the pressurized racks working inside the European laboratory. One of the ATCS goals is to provide proper water flow rate to each payload (P/L) by controlling actively the pressure drop across the common plenum distribution piping. Overall flow measurement performed by the Water Pump Assembly (WPA) is the only flow rate monitor available at system level and is not part of the feedback control system. At rack activation the flow rate provided by the system is derived on ground by computing the WPA flow increase. With this approach, several anomalies were raised during these 3 years on-orbit, with the indication of low flow rate conditions on the European racks FSL, BioLab, EDR and EPM. This paper reviews the system and P/Ls calibration approach, the anomalies occurred, the engineering evaluation on the measurement approach and the accuracy improvements proposed, the on-orbit test under evaluation with NASA and finally discusses possible short and long term solutions in case of anomaly confirmation.

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Updates on HRF Payloads Operations in Columbus ATCS

Cited by 2 publications

References 3 publications

Dynamic Analysis and Intelligent Control Strategy for the Internal Thermal Control Fluid Loop of Scientific Experimental Racks in Space Stations

Dynamic Analysis and Intelligent Control Strategy for the Internal Thermal Control Fluid Loop of Scientific Experimental Racks in Space Stations

Columbus Payloads Flow Rate Anomalies

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