APPLICATION OF THE LIMIT-CYCLE SELFADAPTIVE CONCEPT TO THE B-58 LATERAL DIRECTIONAL STABILITY AUGMENTATION SYSTEM.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO
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The limit-cycle concept is used to sesign a lateraldirectional control system for the B-58. Existing servos and sensors are used, and the mechanical aileron-torudder interconnect is maintained. An analog simulation is used to evaluate the feasibility of the concept as applied to the B-58. The design is evaluated for rolldamper failure, coordination, wing heaviness, and engine failure. The evaluation shows that the concept will usually result in a system with good lateral stability but low Dutch roll damping. The low damping can cause serious pilot coupling. Some possible corrective measures are indicated. Author