Newman David G, Ostler David
Faculty of Engineering and Industrial Sciences, Swinburne University, Hawthorn, Victoria, Australia.
Aviat Space Environ Med. 2011 Aug;82(8):819-24. doi: 10.3357/asem.2978.2011.
Modern super agile fighter aircraft have significantly expanded maneuverability envelopes, often involving very high angles of attack (AOA) in the post-stall region. One such maneuver is the high AOA velocity vector roll. The geometry of this flight maneuver is such that during the roll there is a significant lateral C load imposed on the unrestrained head-neck complex of the pilot.
A mathematical analysis of the geometric relationship determining the magnitude of +/- Gy acceleration during high AOA maneuvering was conducted. This preliminary mathematical model is able to predict the Gy load imposed on the head-neck complex of the pilot for a given set of flight maneuver parameters.
The analysis predicts that at an AOA of 700 and with a roll rate of 100 degrees x s(-1), the lateral G developed will be approximately 3.5 Gy. Increasing the roll rate increases the lateral G component: at 200 degrees x s(-1) the Gy, load is more than 6 Gy.
There are serious potential implications of super agile maneuvers on the neck of the pilot. The G environment experienced by the pilot of super agile aircraft is increasingly multiaxial, involving +/- Gx, +/- Gy, and +/- Gz. The level of lateral G developed during these dynamic flight maneuvers should not be underestimated, as such G loads can potentially lead to neck injuries. While aircraft become ever more capable, a full understanding of the biodynamic effects on the pilot while exploiting the agility of the aircraft still needs to be developed.
现代超级敏捷战斗机显著扩大了机动性范围，在失速后区域常常涉及非常高的攻角（AOA）。一种这样的机动动作是高攻角速度矢量滚转。这种飞行机动的几何形状使得在滚转过程中，飞行员未受约束的头颈复合体上会受到显著的横向C载荷。
对确定高攻角机动过程中+/- Gy加速度大小的几何关系进行了数学分析。这个初步的数学模型能够针对给定的一组飞行机动参数预测施加在飞行员头颈复合体上的Gy载荷。
分析预测，在攻角为70°且滚转速率为100度×秒⁻¹时，产生的横向G将约为3.5 Gy。增加滚转速率会增加横向G分量：在200度×秒⁻¹时，Gy载荷超过6 Gy。
超级敏捷机动动作对飞行员颈部有严重的潜在影响。超级敏捷飞机的飞行员所经历的G环境越来越多轴，涉及+/- Gx、+/- Gy和+/- Gz。在这些动态飞行机动过程中产生的横向G水平不应被低估，因为这样的G载荷可能会导致颈部受伤。虽然飞机的能力不断增强，但在利用飞机的敏捷性时，仍需要充分了解其对飞行员的生物动力学影响。
