基于目标补偿法的数控机床机械加工零件精度控制研究

传统的数控机床机械加工零件过程缺少对螺距综合补偿值计算,导致零件精度控制性能差、反向间隙补偿效果不好等问题。研究提出了基于目标补偿法的数控机床机械加工零件精度控制方法,建立了数控机床坐标系,对数控机床机械加工零件数据进行预处理。采用目标补偿法对螺距补偿后的综合补偿值计算,并设定阈值,控制各轴单周期的补偿量使用满足机床各轴进给速度的平滑性要求。运用目标补偿法对数控机床加工零件精度控制,完成数控机床机械加工零件精度的控制。实验结果表明,研究方法比传统方法加工零件精度控制效果好,可对反向间隙进行有效补偿,满足数控机床机械加工零件精度控制需求,具有一定的实际应用意义。

大型线性模型参数估计的目标补偿法

提出了一种关于线性模型参数估计问题的目标补偿算法，它的主要特点是不用Ｌａｇｒａｎｇｅ乘子作协调变量，而通过对子问题的目标引入补偿项来协调，从而简化了算法结构．理论分析和实例计算表明，它的收敛性较好，适宜在多处理机系统上实现。

Optimization of Operational Parameters in a Three Phase AC / DC Reactive Power Compensator

AC / DC converter is a kind of devices applicable to reactive power compensation. Three parameters including losses, Total Harmonic Distortion （THD） and compensation capacity have important role in designing procedure that these parameters are affected by the firing angle. Consideration trade of between these parameters can cause be selected suitable firing angle for optimal working of the compensator. In this paper is defined an objective function which includes the above parameters. This objective function is optimized through appropriate weighting factor for any parameters and the optimal firing angle will be obtained. So, the mention parameters can be selected optimally.