基于块联模型的动态非线性校正方法比较  

Comparison of Nonlinear Dynamic Correcting Methods Based on Block Oriented Models

作　　者：张媛媛[1,2] 徐科军[3,4] 

机构地区：[1]合肥工业大学仪器科学与光电工程学院,安徽合肥230009 [2]安徽大学电子科学与技术学院,安徽合肥230039 [3]合肥工业大学电气与自动化工程学院,安徽合肥230009 [4]工业自动化安徽省工程技术研究中心,安徽合肥230009

出　　处：《控制工程》2009年第2期121-124,共4页Control Engineering of China

基　　金：国家自然科学基金资助项目(60474057)

摘　　要：针对以块联模型表示,且静态特性位于第一象限的饱和型非线性传感器,进行基于块联模型的动态非线性校正方法研究。块联模型包括Hammerstein和Wiener模型,虽然它们都是由静态非线性校正环节和动态线性补偿环节组成,但是由于位置不同,即对传感器输出信号进行处理的顺序不同,校正效果也就有所不同。根据传感器不同的阻尼比,分别研究Hammerstein和Wiener模型的动态非线性校正方法的实现,并比较它们的校正效果。结果表明,传感器模型或阻尼比不同时,动态非线性校正方法的选择也应有所不同。研究成果为以后设计同类型传感器的动态非线性校正系统提供了先验知识。The nonlinear dynamic correcting methods based on block oriented model are researched for the sensors based on oriented model with the nonlinear static characteristic of saturation in first quadrant. The block oriented model includes Hammerstein and Wiener models, which are all consist of a nonlinear static part and a linear dynamic part. Their sequences are different, therefore their processing sequence of the sensor output signal and correcting results are different. Implements of nonlinear dynamic correcting methods based on Hammerstein and Wiener models are discussed and their correcting effect is compared according to different damp ratios of sensors. The results indicate that the selection should be different when model and damp ratios of sensors are different. Research can provide experience knowledge for the design of nonlinear dynamic correcting systems based on such sensors.

关 键 词：HAMMERSTEIN模型 WIENER模型 动态非线性校正 静态特性 动态特性 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]