Applying Frequency-Domain Unsteady Lifting-Line Theory to Time-Domain Problems

Frequency-domain unsteady lifting-line theory is better developed than its time-domain counterpart. To take advantage of this, this paper transforms kinematics to the frequency domain, performs a convolution and then returns results back time-domain. It demonstrates how well-developed frequency-domain methods can be easily applied problems, enabling prediction forces moments on finite wings undergoing arbitrary kinematics.