本文件定义了与表征某些类别飞机运动及其基本动态特性的概念和数量相关的术语。 假设飞机是刚性的，具有恒定的质量和恒定的惯性。它没有配备修改其自然动态行为的系统。然而，大多数定义都适用于可变质量和可变惯性的柔性飞机。 本文件中定义的一般概念适用于大气飞行阶段。

This document defines terms related to the concepts and quantities characterizing some classes of aircraft motion and their fundamental dynamic characteristics. The aircraft is assumed to be rigid, of constant mass and of constant inertia. It is not equipped with systems modifying its natural dynamic behaviour. However, most of the definitions can be applied to the case of a flexible aircraft, of variable mass and of variable inertia. The general concepts defined in this document are applicable to the atmospheric flight phase.