Simulation Model "Overdrive" Interface
The simulation model "overdrive" interface allows the user to drive the vehicle states with flight or other data sources (i.e., other simulation output). In this manner, a time history of the total simulation coefficient data is produced, along with all the component data time
histories. As shown in the diagram, the flight data's aerodynamic force and moment coefficient terms are extracted as well, allowing the direct comparison of the propagated simulation output with the flight extracted terms. This approach does not use any integration of the states, the
predicted simulation output is derived directly from the table output based on the stated functionality. In this manner, there is no buildup of errors as time progresses, only a comparison of the predicted vehicle coefficient data at the same time and state conditions as the extracted
flight terms.
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This direct comparison technique enables the user to quickly identify the conditions at which the model and flight data differ, and using the other data manipulation tools in D-Six, to dynamically edit and review the effects of the model updates. Since there is no integration, the
Overdrive tool can process large quantities of flight data rapidly. Further, the overdrive function can be accessed with the Scripting interface, allowing the batch processing of test data.
In order to expedite the tedious process of mapping the flight test variables to the required simulation variables, the overdrive tool provides a cross reference interface that allows the user to graphically map, scale and offset the flight test variables to the required simulation
variables. Once built, this mapping can be retained for use on other similarly configured flies. Further, D-Six can directly load a number of flight test data formats with no conversion, and additional flight data formats can be added if needed.
View Cross Reference Interface
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