研究切削系统稳定性时需要建立切削系统结构的动力模型。通常把系统简化为N自由度系统(图1)。重要的是质点a或刀具的运动。振动是在笛卡尔三维座标空间中进行的,或近似地看作是在二维空间内的平面运动。但是若采用N维欧氏向量空间来描述和分析,能使问题更加明确,事实上若选用N To study the stability of the cutting system, a dynamic model of the cutting system structure needs to be established. The system is usually simplified to an N-degree of freedom system (Figure 1). It is important that the mass a or the movement of the tool. Vibration is carried out in Cartesian coordinate space, or approximately as a plane motion in two-dimensional space. However, if the N dimensional Euclidean vector space is used to describe and analyze, the problem can be made clearer. In fact, if N