外热流模拟对象在线辨识方法比较分析  

Comparison and analysis of on-line identification methods applied to space heat flux simulating objects

作　　者：张军[1] 郭赣[1] 王奕荣[1] 

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《航天器环境工程》2007年第2期99-103,62,共5页Spacecraft Environment Engineering

摘　　要：用红外加热笼进行航天器外热流模拟时,要获得热流、温度的优良控制品质,前提是需要准确辨识被控对象模型。文章选取两次航天器热真空试验、多个回路实际测量数据,通过比较常见的3种辨识方法的辨识效果,认为相对于其它两种辨识方法,近似极大似然递推算法具有抗干扰能力强、适应不同噪声环境、参数稳定收敛等优点。In using infrared heating cage to simulate external heat flux on spacecraft, a fine control of heat flux or temperature requires an accurate identification of the temperature model. This paper compares three commonly used system identification methods applied to test data derived from two separate thermal vacuum tests and a multi-loop measurement. It is shown that the approximate maximum likelihood estimation is the best with its strong adaptability to various noise environments. The parameters identified by this method are stable and convergent.

关 键 词：系统辨识 热真空试验 温度模型 

分 类 号：O231.3[理学—运筹学与控制论] V524.3[理学—数学]