In view of the phenomena of fracture of the heading control pull rod support and large vi-bration of pedal in the rear cabin during flight of a helicopter,the mounting dynamic characteristics of the heading control system were optimized by increasing the counterweight of the heading control system and replacing part of the pull rod with a ball cable.The test flight verification results showed that the two methods could effectively reduce the vibration of the pull rod,and then significantly im-prove the vibration of the support loading and pedal.
helicopterheading control systemdynamic characteristicsincrease the counter-weightball cableflight test verification
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