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Chapter: Flight and Ground Experimental Test Technologies, new invention technology, Research project papers,

Real-Time Parameter Identification

Real-Time Parameter Identification
Flight and Ground Experimental Test Technologies, Advancing technology and science through flight 2014, Research, Technology, and Engineering Accomplishments, National Aeronautics and Space Administration NASA, Neil A. Armstrong Flight Research Center. new invention technology, Research project papers;

Real-Time Parameter Identification


Armstrong researchers have implemented in the control room a technique for estimating in real time the aerodynamic parameters that describe the stability and control characteristics of an aircraft. Typically, aerodynamic modeling is performed on recorded data after test flights and then used in simulations. The drawback with this approach is that if the collected data are not complete or of high quality, additional


and costly flight tests must be scheduled. In this innovative approach, Armstrong's real-time parameter estimation automates the process and runs during flight, enabling researchers in the control room to evaluate and adjust flight maneuvers to ensure data quality. The technology increases the efficiency and productivity of flight tests, as researchers can determine during the tests if they have collected the data needed for specific modeling simulations.



Work to date: The technology is currently being used in Armstrong control rooms to evaluate data collected during test flights as well as in-flight maneuvers.


Looking ahead: Researchers are continuing to improve the system display and are working to refine the way results are presented. A capability to compare the estimated parameters to preflight-predicted values is being added, which will make it possible to evaluate the aerodynamic effects of aircraft modifications.




 Automates data collection: Estimates in real time the parameters for aircraft stability and control


 Improves data quality: Enables adjustments during flight tests to ensure correct data acquisition

 Saves time and resources: Decreases the duration and number of flight tests




 Aerodynamic modeling


Flight and Ground Experimental Test Technologies


Armstrong conducts innovative flight research that continues to expand its world-class capabilities, with special expertise in research and testbed platforms, science platforms, and support aircraft. Re-searchers place particular emphasis on providing accurate flight data for research aimed at designing next-generation flight vehicles. Described here are research projects that are seeking to increase safety, reduce costs, and dramatically decrease testing and approval times. Armstrong's new verification and validation (V&V) simulation test bench is particularly innovative as it integrates reconfigurable software models for multiple aircraft components. These models enable high-fidelity simulations to be performed more easily and at significantly faster rates than are possible with hardware-centric test benches.


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