ARMY SBIR A152-090

ARMY SBIR A152-090:  : Linear Inflow Model Synthesis for Advanced Rotorcraft Configurations

TECHNOLOGY AREAS: Air Platform

OBJECTIVE: Develop and validate a method to numerically determine accurate linear state-space inflow models from physics-based aerodynamic models of advanced rotorcraft configurations.

DESCRIPTION: Current linear rotorcraft flight dynamics models are dependent on finite-state inflow theory based on potential flow modeling at the rotor plane [1]. These inflow models have few parameters and are readily available in linear state-space form, making them easy to implement in flight dynamic models for stability assessment and control system design studies. These types of models have been developed for [2] and extensively used in [3] modeling single main rotor helicopters. The future Army rotorcraft fleet will include configurations beyond the traditional single main rotor/trail rotor helicopters (e.g., tiltrotors and compounds) and advances in simulation modeling are required. 

RFP: Q4 FY1