冲压式气动系统的建模与线性化分析

针对一种冲压式气动系统,建立了冲压式气动系统的数学模型。考虑到系统的非线性特性,设计了一种基于脉宽调制线性化的控制方法,取代了原有的振荡线性化控制,并对其进行仿真分析。结果表明,系统的性能满足系统设计要求。试验结果与仿真结果基本一致,仿真计算可以用于冲压式气动系统性能的优化与分析。

Modeling and Linearity Analysis of Ram-air Servo System

In order to settle the troubles in on-line deformation measurement of workpiece, a deformation prediction method based on artificial neutral network was proposed. The cutting experiment scheme was designed by using orthogonal experiment technique. The experiments in different milling parameters were carried out, the workpieces' deformations were measured, and the deformation prediction model was created by using a Back-Propagation neural network and taking the experiment data as its training examples. According to the validation of the additional production experiments, the model's accuracy in the scope of examples is 99.56% and better than 95.47% outside the scope of examples. The results show that the deformation prediction model can accurately reflect the relationship between deformation and milling parameters.