摘要
介绍一种活塞环非圆轮廓曲线数控仿形技术及系统外界扰动信号的智能决策与模糊控制技术。以一个近似于二次谐波曲线的凸轮作为驱动刀具进给的正弦机构，进给行程通过调整杆杠来改变，可以在电机不反转的前提下，实现刀具进给运动，从而大大提高系统的频响；借助于调节电机速度，使刀具进给速度与主轴速度保持某种预定关系（与活塞环型号、规格有关），便可加工出不同型号和规格的活塞环零件；采用智能决策方法和模糊控制规则，形成专家智能控制系统，提高系统鲁棒性和工件的仿形加工精度。
This paper introduces a new method for numerical copying nn-round piston rings. The system could be able to withstand the external disturbances, measurement noise when copying cutting the non─round piston rings by adopting the advantages of intelligent method of making policy and fuzzy control techonlogy. A quasi-sinusoid mechanism is designed to drive a toolholder through a intermediate lever, in which, an approximately quadric harmonic cam of the mechanism is driven by a stepping motor,then the across feed of the tool clamped on the toolholder is independent on the rotation of the spindle. The rise of the tool tip can be adjusted by displacing the transfer point of a lever and,by means of which, various types and different dimensions of piston rings can be machined under the condition of the stepping motor rotating in one direction, and hence the frequency response of the servo mechanism is improved greatly as is compared to that of rotating bi-directionally. By adjusting the angular speed of the motor so as to match that of the workpiece which is clamped on the spindle of the machine different types of piston rings can be machined. Towards providing robust control and high copying accuracy,a noise check policy and a fuzzy controller which is ideally suited for system with unknown or nonlinear models is developed for the machining system described above.
出处
《中国机械工程》
CAS
CSCD
北大核心
1996年第6期24-26,共3页
China Mechanical Engineering
基金
湖南省科学技术委员会重点攻关项目
