带摆动机构的多线切割机控制系统研制

Development of Control System in the Multi-wire Saw with Rocking Mechanism

针对传统多线切割机只能手动绕线和切片过程中LED基材受力不均的局限性,用摆动机构替换原固定结构,增加自动绕线功能,提高了切片质量和效率以及金刚石线的利用率。分析机器改进之后的机械结构和工作原理,重点研究系统自动绕线和多电动机高速同步运行的两个难点问题。结合模糊控制和迭代学习控制的优点,给出带摆动机构的多线切割机线速度同步控制的模糊迭代学习控制策略,克服单一模糊控制的稳态误差,得到较好的控制效果。设计自动绕线的误差控制方案,当金刚石线没有嵌入槽内而绕在槽壁上时,该控制方案能迅速动作使金刚石线入槽。试验结果表明,系统自动绕线速度快,精度高,同步控制性能好。

In traditional multi-wire saw have function of manual winding only and the limitations of LED base material uneven force,the rocking mechanism is proposed to substitute for the original fixed structure,automatic winding function is increased,the quality and efficiency of slice and utilization rate of the diamond wire are improved.The mechanical structure and working principle are analysed after machine structure is improved.Two difficult problems which are automatic winding and multi-motor high-speed synchronization are mainly studied.Combining the advantages of fuzzy control and iterative learning control,a fuzzy iterative learning control strategy of Multi-wire saw with rocking mechanism is given.This strategy overcomes the steady-state error of single fuzzy control and get better control effect.The automatic winding error control scheme is designed,when diamond wire do not embed into the slot and around the slot wall,the control scheme can act quickly to make the diamond wire into the slot.Experimental results show that the system automatic winding performs fast speed,high precision and synchronous control performance is good.