摘要
为了实现加工轨迹段间高速平滑转接,根据空间矢量理论和机床加工的离散周期特征,提出了一种基于S曲线的矢量转接算法。首先,分析了S曲线和矢量转接算法原理,把相邻轨迹段按照S曲线规律进行插补的位移进行矢量求和,求和的结果作为机床的进给位移,形成转接曲线;然后建立了机床加工精度与转接开始的最大允许速度之间的关系;最后探讨了一种对转接算法进行优化的方法,约束控制转角处的速度v、加速度a、加加速度J。实验证明,该算法在满足加工精度的前提下,能够实现轨迹段间高速平滑的转接,从而提高了加工效率和精度。
Making use of space vector theory and discrete cycle characteristics of interpolation, a method based on S-shape curve acceleration and deceleration was developed to realize smooth transfers along a continuous segment trajectory. The principle of S-curve and the method was taken firstly, in each interpolation cycle the sum result of two adjacent moves vector was used as the actual displacement of machine, and the transition curve was formed simultaneously. Then the relationship between machining precision and the max allowable transfer speed of the method was studied. Finally, we discussed a new control algorithm to optimize the corner velocity, acceleration, and jerk.Simulation result of a practical example demonstrated that the machine using the proposed method and optimization algorithm can realize smooth transfers along a continuous segment trajectory while ensuring the machining precision.
出处
《组合机床与自动化加工技术》
北大核心
2010年第5期13-16,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
"高档数控机床与基础制造装备"国家科技重大专项-基于国产"龙芯"CPU芯片的高档数控装置(2009ZX04009-022)
关键词
连续加工
转角速度
矢量转接
加工精度
continuous machining
comer velocity
vector transition
machining precision
