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Failure to achieve satisfactory level for transient response of an aircraft in longitudinal motion-short period mode and phugoid modes-would mean poor flying and handling qualities leading to unnecessary pilot workload. This paper presents a new algorithm for augmentation of stability in longitudinal flying modes for steady and level flight of a small piston-engine general aviation airplane-Cessna 182.
Two feedback gain systems, pitch attitude and pitch rate gains are scheduled based on dynamic pressure values and are combined into the aircraft longitudinal Stability augmentation systems (SAS). The proposed SAS has proven to be the suitable candidate for small aircraft (Cessna) as it is able to ensure Level 1 flying qualities longitudinally.
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