A stability analysis of the proposed circulation control rotor (CCR) prototype
Cline, John Hendrix
Schmidt, Louis V.
Layton, Donald M.
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The rotor system of the proposed XH-2/CCR (Circulation Control Rotor) prototype aircraft and the state variable format of the airframe equations of motion are described. Through a study of the eigenvalues and eigenvectors of the basic airframe. the effect of uncoupling and cross-coupling the helicopter equation of motions were analyzed. The control matrix for the CCR was then generated using an applicable pneumatic lead angle for Coanda blowing. Feedback gains, to give the aircraft acceptable flying qualities, were calculated for the Stability Augmentation System (SAS) and finally the aircraft's sensitivity to changes in pneumatic lead angles were studied. the programs used in the above study (capable of handling up to 10 X 10 matrices) are listed for both the IBM-360 and HP-9830 mini-computer.
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