Affiliation:
1. Raytheon Missiles & Defense, Tucson, Arizona 85756
Abstract
An aerodynamic model is a mathematical representation of the behavior of a vehicle in free flight, and the architecture defines the set of variables and equations used to construct the aerodynamic forces and moments. Aeromodels are widely used to represent aerodynamic performance during the design, development, and validation of air vehicles. Architecture selection drives source data requirements and therefore has ramifications for simulation accuracy, program cost, and schedule. This paper describes four approaches appropriate for simple cruciform airframes and provides selection rationale for each. These architectures employ [Formula: see text] table lookups and the principle of superposition to combine basic stability and control effectiveness components. Body axis mixed architecture provides an efficient method for modeling winged vehicles with limited maneuver requirements. Maneuver mixed-panel architecture enables efficient data collection for a wide range of airframe configurations, providing high accuracy around trim points. Single-panel architecture allows a large domain of flight conditions to be modeled with first-order accuracy using a relatively small data set. Lastly, polar architecture is ideal to reduce the number of independent variable dimensions for spinning projectiles. The architectures described are for the core of the aerodynamic model: steady-state aerodynamic behavior without detailed drag buildup, uncertainty, stability derivatives, transient effects, or application-specific elements.
Publisher
American Institute of Aeronautics and Astronautics (AIAA)
Subject
Space and Planetary Science,Aerospace Engineering
Reference29 articles.
1. Progress in Aeronautics and Astronautics;Hemsch M. J.,1992
2. BlakeW. B. “Missile DATCOM: User’s Manual—2011 Revision,” Air Force Research Lab., AFRL-RB-WP-TR-2011-3071, March 2011.
3. High Angle of Attack Aerodynamic Predictions Using Missile Datcom
4. Recent Improvements to Missile DATCOM
5. MooreF. G. “State-of-the-Art Engineering Aeroprediction Methods with Emphasis on New Semiempirical Techniques for Predicting Nonlinear Aerodynamics on Complete Missile Configurations,” Naval Surface Warfare Center Dahlgren Division TR-93-551, Dahlgren, VA, Nov. 2003.