Phugoid Damping Control

<p>A novel phugoid damping control design methodology is developed based on the use of wind axes and a point-mass aircraft model. The state variables are air speed flight path angle and heading angle the control variables are thrust setting angle of attack bank angle and sideslip angle and the command signals are airspeed flight path angle and heading angle or heading rate. All the variables and parameters are nondimensionalized. A multivariable set point controller is developed which consists of: (i) a trim calculation-based nonlinear feed-forward control computer; thus given a commanded new trim state (air speed flight path angle and yaw rate) the required trim thrust setting and trim angle of attack bank angle and sideslip angle inputs are determined and (ii) a small signal linear feedback regulator; the equations of motion linearized about the trim condition of wings level and constant altitude flight which simplifies the dynamics to allow separation between the lateral and longitudinal control channels are used and a small-signal linear multivariable regulator is designed. The linear compensator also entails integral action.</p><p>This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact and remains as true to the original work as possible. Therefore you will see the original copyright references library stamps (as most of these works have been housed in our most important libraries around the world) and other notations in the work.</p><p>This work is in the public domain in the United States of America and possibly other nations. Within the United States you may freely copy and distribute this work as no entity (individual or corporate) has a copyright on the body of the work.</p><p>As a reproduction of a historical artifact this work may contain missing or blurred pages poor pictures errant marks etc. Scholars believe and we concur that this work is important enough to be preserved reproduced and made generally available to the public. We appreciate your support of the preservation process and thank you for being an important part of keeping this knowledge alive and relevant.</p>