摘要
气流场压力和流量的精密控制是气候观测综合计量检定系统的关键技术,但压力控制和流量控制存在相互耦合干扰,系统的非线性、时变性特点决定了无法建立其精确数学模型,从而无法利用传统的方法进行解耦。为解决这一问题提出了一种基于压力、流量扰动模型的解耦控制方法,利用理想气体状态方程和预测原理分析得出压力、流量的相互扰动模型,通过预先调整控制器输出来抑制扰动和时滞影响。实验表明该方法对压力和流量的耦合起到了显著削弱效果。
There exists coupling interference between air pressure control and flow control of climate observation verification system. The system＇s non-linear and time-invariance characteristics make the math model of the system can＇t be built, thus unable to use the traditional meth- ods for decoupling. A decoupling method based on disturbance model is presented to solve this problem. With the state equation of ideal gas and prediction principle, the disturbance model can be obtained. Then, the disturbance and delay effects can be restrained by adjusting controller outputs in advance. Test results show that this method is of great importance to improve the experimental efficiency.
出处
《计测技术》
2012年第6期6-9,共4页
Metrology & Measurement Technology
基金
国家公益性行业(气象)科研专项资助(GYHY200706003)
关键词
计量检定
精密控制
扰动模型
解耦
verification
precision control
disturbance model
decoupling
