AuthorJ.A. Evans, M. Oghbaei & K. S. Anderson
TitleModeling and Simulation of a Laser-Powered Lightcraft Using Impulse State-Time Equations
JournalAmerican Institute of Aeronautics & Astronautics
AbstractIn this paper, the authors demonstrate the capabilities of a novel state-time methodology for the simulation of dynamic systems. The test case under consideration is a six-degree of freedom model of the Type 200 laser-powered lightcraft. The lightcraft problem is a well-suited application demonstrating the potential advantages of using the state-time formulation for achieving signi cant e ective parallel computing utilization as the craft's temporal domain is much larger than its spatial domain. Indeed, while relatively few processors can be e ectively utilized in modeling the vehicle via traditional state-type al- gorithms, more than 105 processors may be potentially exploited in a state-time dynamic simulation. In this paper, a modi ed state-time methodology is derived in order to ac- count for impulsive characteristics. This impulsive formulation allows for parallelization not only between impulses but also across impulses. In fact, this impulsive formulation may be extended towards other dynamic systems exhibiting impulsive behavior as well. Furthermore, an aerodynamic model fully compatibile with the state-time formulation is presented, and a sliding linearization scheme is presented to simplify these resulting terms. A continuation method is utilized along with a Newton-Raphson scheme to solve the re- sulting system of nonlinear algebraic equations. Validation and veri cation of the method is obtained by comparing the impulsive state-time simulation results with the results of a traditional state-type dynamics algorithm using Autolev software and with experimental results.
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