磨床砂轮动平衡测控系统控制新策略

The New Control Strategy of Grinding Wheel Dynamic Balance Measurement and Control System

磨加工过程中砂轮的不平衡振动会对磨削精度、砂轮寿命产生不利的影响。该文以变结构控制理论为基础,通过建立平衡头数学模型,提出了采用基于组合趋近律的滑模变结构控制方法来控制平衡头内部的电机,调整偏心齿圈的位置,实现砂轮的在线动不平衡量补偿。基于MATLAB对控制算法进行平衡过程仿真,证明了控制算法的准确性。基于滑模变结构控制策略的系统进行试验分析,能够有效消除砂轮的振动不平衡,平衡精度达到(0~0.2)μm,验证了控制新策略的可行性。

Grinder wheel unbalancehoveharmfuleffects on the precision grinding, grinder wheel life in the process of grinding. This paper is based on the variable structure control theory, through the establishment of mathematical model of balancing head it is proposed, based on combination of reaching law of sliding mode variable structure a control method to control the motor inside balance head, adjust the position of the eccentric gear ring, realize the wheel on-line dynamic balancing compensation. The control algorithm, simulation based on MATLAB proved the accuracy of the algorithm.Based on sliding mode variable structure control strategy of system test analysis, the system can effectively eliminate the vibration of the grinding wheel unbalance, balance precision is（0--0.2）μm, verify the feasibility of new control strategies.