PLIF Study of Mars Science Laboratory Capsule Reaction Control System Jets

Johansen, Craig T.; Danehy, Paul M.; Ashcraft, Scott W.; Bathel, Brett F.; Inman, Jennifer A.; Jones, Stephen B.

doi:10.2514/6.2011-3890

Cited by 7 publications

(9 citation statements)

References 25 publications

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“…4 By electrically heating compressed air, the facility is able to provide Mach 10 flow through the 31-inch square test section for approximately 90 seconds. 13 The test section has optical access through two large windows located on the top and bottom tunnel walls.…”

Section: Wind Tunnel and Model Experimental Setupmentioning

confidence: 99%

“…2,3,8 As a result of the NESC initiative, recent detailed experimental data of flow separation and jet interaction associated with the MSL vehicle are now available for a rigorous CFD validation. 4 Validation is crucial, especially for RANS-type models, since they have difficulty in predicting turbulent flows with streamline curvature or flow separation. 9 In high-speed aerodynamics, non-intrusive laser diagnostic measurements are preferred over conventional probebased techniques to build a validation dataset.…”

Section: Introductionmentioning

confidence: 99%

“…There is an expected interaction between the reaction control system (RCS) jets and the capsule wake in addition to interaction between individual RCS jets. [1][2][3][4] The hypersonic flow field consists of a strong bow shock wave ahead of the capsule forebody, a supersonic expansion fan around the capsule shoulder, and a large subsonic separated region in the capsule wake. Recompression shock waves redirect the outerflow downstream of the capsule wake.…”

Section: Introductionmentioning

confidence: 99%

“…The experimental validation dataset was produced from a wind tunnel test in NASA Langley Research Center's 31-inch Mach 10 facility in 2010. 4 In that study, nitric oxide (NO) gas was supplied to both the RCS jet plenum and to the sting that held the 1/29½ scale model of the MSL flight vehicle. This facilitated NO-PLIF visualization of both the capsule wake and the RCS jets for jet-on and jet-off conditions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of MSL RCS jet computations with flow visualization and velocimetry

Johansen

Novak

Bathel

et al. 2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Section: Wind Tunnel and Model Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of MSL RCS jet computations with flow visualization and velocimetry

Johansen

Novak

Bathel

et al. 2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Self Cite

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“…For example, quantitative measurements of laminar and laminar-unsteady hypersonic boundary layer behavior, [5][6][7] reaction control system (RCS) jet behavior in wake flows, 5,6,8,9 and facility characterization 10 were of particular interest. Since these types of experiments were to be made in flows with both a steady and unsteady nature, the quantitative measurements to be used required the ability to probe the flowfield with relatively high spatial and temporal accuracy and precision.…”

Section: B Single-laser No Mtv With a Double-frame Cameramentioning

confidence: 99%

Review of Fluorescence-Based Velocimetry Techniques to Study High-Speed Compressible Flows

Bathel

Johansen

Inman

et al. 2013

51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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This paper reviews five laser-induced fluorescence-based velocimetry techniques that have been used to study high-speed compressible flows at NASA Langley Research Center. The techniques discussed in this paper include nitric oxide (NO) molecular tagging velocimetry (MTV), nitrogen dioxide photodissociation (NO 2 -to-NO) MTV, and NO and atomic oxygen (O-atom) Doppler-shift-based velocimetry. Measurements of both singlecomponent and two-component velocity have been performed using these techniques. This paper details the specific application and experiment for which each technique has been used, the facility in which the experiment was performed, the experimental setup, sample results, and a discussion of the lessons learned from each experiment. Nomenclature

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Active disturbance rejected predictive functional control for space vehicles with RCS

Shifeng

2018

Journal of Systems Engineering and Electronics

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Reaction control system (RCS) is a powerful and efficient actuator for space vehicles attitude control, which is typically characterized as a pulsed unilateral effector only with two states (off/on). Along with inevitable internal uncertainties and external disturbances in practice, this inherent nonlinear character always hinders space vehicles autopilot from pursuing precise tracking performance. Compared to most of pre-existing methodologies that passively suppress the uncertainties and disturbances, a design based on predictive functional control (PFC) and generalized extended state observer (GESO) is firstly proposed for three-axis RCS control system to actively reject that with no requirement for additional fuel consumption. To obtain a high fidelity predictive model on which the performance of PFC greatly depends, the nonlinear coupling multiple-input multiple-output (MIMO) flight dynamics model is parameterized as a state-dependent coefficient form. And based on that, a MIMO PFC algorithm in state space domain for a plant of arbitrary orders is deduced in this paper. The internal uncertainties and external disturbances are lumped as a total disturbance, which is estimated and cancelled timely to further enhance the robustness. The continuous control command synthesised by above controller-rejector tandem is finally modulated by pulse width pulse frequency modulator (PWPF) to on-off signals to meet RCS requirement. The robustness and feasibility of the proposed design are validated by a series of performance comparison simulations with some prominent methods in the presence of significant perturbations and disturbances, as well as measurement noise.

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PLIF Study of Mars Science Laboratory Capsule Reaction Control System Jets

Cited by 7 publications

References 25 publications

Comparison of MSL RCS jet computations with flow visualization and velocimetry

Comparison of MSL RCS jet computations with flow visualization and velocimetry

Review of Fluorescence-Based Velocimetry Techniques to Study High-Speed Compressible Flows

Active disturbance rejected predictive functional control for space vehicles with RCS

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