![]() Multi-axis force stick, self-trimmed aircraft flight control systemĬomplementary commands in fail-operational, fail-safe multi-computer control system Vital message system with unique function identificationĪutomatic limiting of helicopter engine torqueĬontrol system having a self-diagnostic functionįault scoring and selection circuit and method for redundant systemĪircraft short-term roll attitude retention system ![]() Propeller system with electronically controlled cyclic and collective blade pitch These flight control automation methods were designed to enable the use of small displacement, multi-axis controllers for full envelope helicopter control the system provides dramatic pilot work load reduction for any of wide range of pilot manipulator configurations.Īpproach to hover control system for helicoptersĭata management equipment for automatic flight control systems having plural digital processorsįlight control system employing complementary filter Vertical control, traditionally accomplished with collective only, is accomplished in this system with a combination of longitudinal cyclic and collective control, increasing vertical response performance and minimizing engine power change demands. Control decoupling is achieved through a combination of force/moment decoupling and open loop prediction methods. Novel task oriented control modes include independent control of heading and ground track at low speed and turn rate and flight path angle control at higher speeds. Among these are control decoupling to reduce undesired helicopter responses in other axes to pilot inputs in one axis, task oriented control modes which are selected automatically, and automatic control of engine torque and rotor speed constraints. An apparatus and method for controlling the flight of a helicopter, in which the pilot commands vehicle state changes, embodies several significant advances to the helicopter control art.
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