Modeling and Flight Dynamics of a Projectile with Nonlinear, Roll-Dependent Aerodynamics
Abstract
Improved maneuverability for long-range projectiles is a key technology that enables both range-extension gliding flight and agile terminal flight. Designing a projectile to have marginal stability across the flight envelope improves maneuverability and reduces requirements for the control surface and actuator. However, the static aerodynamic forces and moments can be strongly nonlinear and can vary substantially with aerodynamic roll angle at moderate to high angles of attack. This work presents an approach to model projectile aerodynamics that are strongly nonlinear with angle of attack and aerodynamic roll angle. The aerodynamic model is then exercised in a 6DoF flight simulation and the results are compared with a complimentary analysis using computational fluid dynamics coupled to rigid-body dynamics simulations. The flight behavior analysis is built up incrementally using pitch-constrained cases and pitch/yaw-constrained cases to isolate different aspects of the dynamics before moving to unconstrained flight analyses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2020
- Accession Number
- AD1109539
Entities
People
- Benjamin C. Gruenwald
- Frank E. Fresconi
- Joseph D. Vasile
- Joshua T. Bryson
- Jubaraj Sahu
Organizations
- United States Army