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The role of rare earth permanent magnets in flight control system

by:Newland     2020-04-24
Flight control system of the rare earth permanent magnets in the role of the flight control system with the electric power system and power of the telex actuators, mainly used in the operation of the wing and rudder. Mainly divided into electro-hydraulic actuator and electromechanical actuator. The helicopter in the mid - 70 - s, the United States of hydraulic system fault occurs frequently in the major international events, encouraging them to research and development of rare earth permanent magnet electric steering gear. General electric company, vickers and HR, strong company developed for the next generation of flight control actuator electro-hydraulic actuator using the technology of ndfeb permanent magnet brushless dc motor. Development of electromechanical actuator adopts high voltage direct current technology of rare earth permanent magnet brushless dc motor and pulse width modulation power inverter technology. Motor controller receives the control commands from the aircraft flight control computer, after three-channel rudder servo amplifier circuit system of comprehensive and amplifier, signal processing, and then corresponding the output Angle of steering gear drive system in order to control the aircraft rudder and aileron rudder surface deflection, which changes the aircraft's attitude and heading, to realize automatic flight control system for aircraft flight control. Process knowledge: commercialization of ndfeb magnet is found the highest performance magnets, magnetic known as king. Its chemical formula is Nd2Fe14B, is a kind of artificial permanent magnets, so far has the strongest magnetic force of permanent magnet. Ndfeb magnet can be divided into bonded ndfeb sintered ndfeb and two. Bond is, in fact, injection molding, and sintering is by vacuum heating forming! Magnet, powerful magnets, special-shaped magnets, magnet manufacturer,
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