Emergency replacement device under helicopter tail rotor failure state and control method

Abstract

The invention discloses an emergency replacement device for a helicopter in a tail rotor failure state and a control method. An air port nozzle is arranged at the tail end of a tail beam of a single-rotor helicopter with a tail rotor structure, and a compressed air cylinder is arranged in a tail beam transition section or a helicopter body; a switch for controlling the gas cylinder is arranged ina cockpit, the gas cylinder control device is in electrical signal linkage with the pedal displacement sensor, and the gas outlet amount of the gas cylinder can be controlled through pedal displacement; the gas port nozzle is controlled by the control unit, and generally, a gas cylinder control switch does not need to be turned on. For a single-rotor helicopter with a tail rotor structure, when atail rotor failure fault occurs, a pilot can turn on a gas cylinder switch, control the gas outlet amount of a gas cylinder through pedal displacement and spray gas flow through a tail gas flow opening to form a reaction torque acting force, so that the course stability of the helicopter is maintained, and time is bought for emergency landing; the damage probability of the helicopter is reduced, and the survival probability of passengers in the helicopter is improved, and crash accidents are avoided.

Description

Technical field[0001]The invention relates to the field of helicopter flight control, in particular to an emergency replacement device and a control method when the tail rotor of a helicopter fails.Background technique[0002]For a single-rotor helicopter with a tail rotor configuration, the helicopter tail rotor mainly serves to balance the anti-torque caused by the rotation of the helicopter's main rotor and to control the helicopter's heading. Tail rotor failure generally refers to the failure of the tail rotor of the helicopter during the flight, which causes the pilot to lose control of the tail rotor, causing the helicopter to be affected by the main rotor and turning in one direction without stopping and unable to control the helicopter heading. When the tail rotor fails, the helicopter will rotate rapidly at low speed due to the reaction torque of the main rotor.[0003]Tail rotor failures generally include: One type is transmission system failure, which is mainly caused by the ...

AI Technical Summary

Problems solved by technology

[0005] When the tail rotor fails, in order to ensure a safe landing, it depends on the pilot's personal special training level and emergency response ability. However, in low-altitude conditions, the flying altitude is insufficient and the recovery time is short. Nervousness, misjudgment, and improper operation lead to loss of control of the helicopter's attitude, resulting in major accidents involving aircraft crashes and fatalities

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