Dynamic Stability of a Bearingless Circulation Control Rotor Blade in Hover

Design of a Bearingless Outer Rotor Induction Motor

A bearingless induction (BI) motor with an outer rotor for flywheel energy storage systems is proposed due to the perceived advantages of simple rotor structure, non-contact support and high speed operation. Firstly, the configuration and operation principle of the proposed motor are described. Then several leading dimensional parameters are optimally calculated for achieving the maximum averag...

Dynamic Analysis of Helicopter Bearingless Main Rotor With Hub Flexbeam Damage Configurations

Active Helicopter Rotor Control Using Blade-Mounted Actuators

An aeroelastic model of a smart rotor system (which incorporates blade-mounted trailing-edge flap actuators and conventional root pitch actuation) is presented in linear time invariant state space form. The servo-flap deflections are modeled as producing incremental lift and moment variations, so that any linear aerodynamic actuator can be evaluated. This smart rotor model is used to conduct pa...

Modeling and Hover Control of a Double-rotor Micro Flying Robot via Shape Change

Zhang, Yongheng M.S.E., Purdue University, August 2009. Modeling and Hover Control of a Double-Rotor Micro Flying Robot via Shape Change. Major Professor: Nasser Houshangi. Research in Micro Aerial Vehicles (MAVs) has been proliferating in both academia and industry during recent years due to their potential applications, e.g. search and rescue in the aftermath of an earthquake. Among others, c...

A Nonlinear Control Law for Hover to Level Flight for the Quad Tilt-rotor UAV

This paper presents recent advances in the project: development of a convertible unmanned aerial vehicle (UAV). This aircraft is able to change its flight configuration from hover to level flight and vice versa by means of a transition maneuver, while maintaining the aircraft in flight. For this purpose a nonlinear control strategy based on Lyapunov design is given. Numerical results are presen...