基于综合指标的机床滚珠丝杠进给系统动态性能优化

建立了滚珠丝杠进给系统理论动力学模型并对其响应传函特性进行分析,构建了基于数字化模块仿真的滚珠丝杠进给驱动系统集成模型,提出了基于扩缩式控制优化模型的滚珠丝杠进给驱动动态性能优化方法,构建面向综合指标评价的可扩缩式动态性能指标评价函数,根据动态性能优化要求实时建立动态性能综合评价指标函数,通过运动路径规划定义,借助遗传优化算法,实现面向可扩缩式综合指标评价的滚珠丝杠进给驱动系统动态性能优化。通过实验测试与实例分析,验证了前述滚珠丝杠进给系统理论动力学建模、基于数字化模块仿真的滚珠丝杠进给驱动系统集成模型、基于扩缩式控制优化模型的滚珠丝杠进给驱动动态性能优化方法的正确性。

Dynamic Performance Optimization of Machine Tool Ball Screw Feed System Based on Comprehensive Indicators

The theoretical dynamic model of ball screw feeding system was firstly established, and the characteristics of its response transfer function were analyzed. Then the integrated model of ball screw feeding drive system based on digital module simulation was constructed. The optimization method of ball screw feed drive dynamic performance based on the scalable control optimization model was proposed. The scalable dynamic characteristic index evaluation function for comprehensive performance estimation was constructed. The dynamic performance evaluation index function can be established in real time according to the requirement of dynamic performance optimization. Based on the above, with the definition of motion path planning, by the genetic optimization algorithm, the dynamic performance optimization of ball screw feed drive system oriented to scalable comprehensive index evaluation was realized finally. By experimental test and case analysis, the validity of the theoretical dynamic modeling of ball screw feeding system and its analysis conclusion, integrated model of ball screw feeding drive system based on digital module simulation, and also dynamic performance optimization method based on the scalable control optimization model were verified. The method provided a reference for dynamic performance optimization of ball screw feed system.