论文部分内容阅读
无论是低速飞机或高速飞机,都必须经历进场着陆阶段,且都要在升限附近飞行。当飞机作大迎角低速飞行时,速度稳定性对于飞机的操纵特性和飞行安全,就显得特别重要。MIL-F-8785B(ASG)对飞机的着陆进场在驾驶员只操纵升降舵而不改变油门的情况下,规定了导数dγ/du作为评定航迹稳定性的判据。dγ/du看来是一个新的判据,因为在1969年MIL-F-8785B(ASG)正式颁发以前还没有使用过。然而在此以前长达数十年的时间内,对于飞机的速度稳定性,曾不断地进行过研究,提出过不同的判别式和要求,其中有些判据形式上虽不同于导数dγ/du,但其实质内容基本上是一致的。本文对速度稳定性问题作一扼要的历史性回顾,并联系dγ/du进行初步的分析讨论。
Both low-speed and high-speed aircraft must go through the approach landing phase and must fly near the ceiling. When the aircraft at low angle of attack at high angles of attack, the speed stability of the aircraft’s handling characteristics and flight safety, it is particularly important. MIL-F-8785B (ASG) Landing Approach to an Aircraft The derivative dγ / du is defined as a criterion for assessing the stability of a track provided that the pilot operates only the elevator without changing the throttle. dγ / du appears to be a new criterion as it has not been used before the formal issuance of MIL-F-8785B (ASG) in 1969. However, up to several decades before, the speed stability of the aircraft has been continuously studied and different discriminant formulas and requirements have been put forward. Some of the criteria are different from the derivative dγ / du in form, But its essence is basically the same. This article gives a brief historical review of the issue of speed stability and makes preliminary discussions with dγ / du.