There is a high probability of emergencies occurring during the takeoff and landing process of carrier-based aircraft. In recent years, numerous carrier-based aircraft accidents have occurred in countries such as the United States, Russia, and the United Kingdom. This is due to the relatively significant changes in pitch angle during the takeoff and landing phases of carrier-based aircraft. When the pilot activates the emergency ejection system, the aircraft often finds itself in an unfavorable attitude with a large pitch angle, accompanied by a certain angular velocity and sink rate. Modern rocket ejection seats generally use the form of a combination of primary and secondary power, among which the primary power is the ejection cartridge, which is fixedly connected to the aircraft, and the secondary power is the rocket engine. Adopt pitch and attitude can effectively increase the thrust of the seat rocket engine in the “sky direction”, obtain more ground altitude, and thus improve the success rate of life saving. In order to meet the safety and life-saving needs of a certain type of carrier-based aircraft under unfavorable attitude, the author and the project team took the lead in developing pitch attitude adjustment technology. This paper briefly introduces the effects of eccentric distances and stabilization systems on pitch control during the pitching adjustment process, provides a solution approach, and lays the groundwork for the engineering application of active pitch control technology in rocket ejection seat systems.

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The Influence of the Distance Between Thrust and Center of Mass on the Pitch Attitude

  • Wei Yang,
  • Zhijie Luo,
  • Xiyao Wang,
  • Botong Liu

摘要

There is a high probability of emergencies occurring during the takeoff and landing process of carrier-based aircraft. In recent years, numerous carrier-based aircraft accidents have occurred in countries such as the United States, Russia, and the United Kingdom. This is due to the relatively significant changes in pitch angle during the takeoff and landing phases of carrier-based aircraft. When the pilot activates the emergency ejection system, the aircraft often finds itself in an unfavorable attitude with a large pitch angle, accompanied by a certain angular velocity and sink rate. Modern rocket ejection seats generally use the form of a combination of primary and secondary power, among which the primary power is the ejection cartridge, which is fixedly connected to the aircraft, and the secondary power is the rocket engine. Adopt pitch and attitude can effectively increase the thrust of the seat rocket engine in the “sky direction”, obtain more ground altitude, and thus improve the success rate of life saving. In order to meet the safety and life-saving needs of a certain type of carrier-based aircraft under unfavorable attitude, the author and the project team took the lead in developing pitch attitude adjustment technology. This paper briefly introduces the effects of eccentric distances and stabilization systems on pitch control during the pitching adjustment process, provides a solution approach, and lays the groundwork for the engineering application of active pitch control technology in rocket ejection seat systems.