高精密3-PPR并联平台的对位精度分析与试验研究

Analysis and Experimental Study on Alignment Accuracy of High Precision 3-PPR Parallel Platform

为了获得3-PPR并联平台的最佳对位精度,针对平台的结构布局与工作影响因素对其对位精度的影响,采用理论误差分析与实验验证的方法对平台进行对位精度研究,得出平台误差数学模型并确定在速度为7.5 mm/s、加速度为100 mm/s 2时平台的对位精度最好,上述分析结果为进一步改善与开发平台性能提供了必要的理论依据,可用于各种高精密对位场合,具有一定的实际应用价值。

In order to obtain the optimal alignment accuracy of 3-PPR parallel platform,aiming at the impact of platform structure and work influencing factors on its alignment accuracy,the theoretical error analysis and experimental verification method are used to study the alignment accuracy of the platform.The mathematical model of the platform error was obtained and the alignment accuracy of the platform was best when the speed is 7.5 mm/s and the acceleration is 100 mm/s 2.The above analysis results provide the necessary theoretical basis for further improvement and development of the platform performance,which has certain practical application value for all kinds of high-precision alignment occasions.