摘要
通过选择比例阀的输出作为系统输入,水柱的液位值作为系统输出,对液位控制系统进行CARMA建模研究。在获得系统的AD/DA输入输出采样数据的基础上,首先通过寻找一个具有较小AIC值的模型的准则来决定模型的阶次,然后取实际值与计算值之累次误差的平方和达到最小时的模型参数值作为CARMA模型的参数,从而实现了液位控制系统的CAR- MA模型的辨识,且经证明模型参数值唯一。模型的预测输出和实际输出的比较结果证实了CARMA建模在液位控制系统中的有效性。
Taking the proportional valve output as the system input, the liquid - level value as the system output, this article studies the CARMA modeling of the liquid - level control system. Based on the sampling input and output data by the AD/DA access to the system, by selecting the AIC criterion as the selection principle to get the system model orders, reeognizing the model parameters when the square error of the praetieal and ealeulated value is the minimum, it has recognized the system CARMA model, at the same time, it is proved that the result is unique. The model prediction output and the actual output＇ s comparison result confirmed the validity of the CARMA modeling in the liguid - level eontrol system.
出处
《计算机仿真》
CSCD
2008年第1期77-79,148,共4页
Computer Simulation
基金
国家自然科学基金(60443008)
关键词
液位控制系统
水箱
建模
仿真
Liquid - level eontrol system
Water - tank
Modeling
Simulation
