摘要
反应系数法是空调动态负荷计算的常用方法，但用基于经典控制理论的传统方法求解多层墙体反应系数时可能发生漏根现象．文中基于Ｒｏｕｔｈ稳定性理论提出一种模型降阶方法，避免了求根，保留了原模型的渐近稳定性和低频特性，实例计算效果很好．
Thermal response factor method was widely used in the calculation of airconditioning cooling loads. The conventional calculating method (Laplace transformation method) of these factors which was based on the classical control theory could lead to rootmissing occasionally. Simplifying a complicated highorder function with model reduction method was one of the effective ways in calculating the response factors of multilayer wall. But sometimes model reduction method might cause the reduced system unstable against the stable original one. In this paper, a new calculating method based on the Routh stability is presented. With Routh method, the infiniteorder s transfer function of multilayer wall can be reduced into a finiteorder one. Thus, the thermal response factors can be calculated from this model and the relationship between the transfer function and the space state method. Using this approach, the thermal response factors can be obtained without finding the roots while the asymptotic stability and the lowfrequency characteristics of the original model are retained. The practical case shows high accuracy of the results and assurance of stability of the thermal response factors. Further study is needed to reduce the order of the function effectively.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1998年第7期14-17,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金
关键词
空调
多层墙体
反应系数
模型降价
airconditioning
multilayer wall
thermal response factor
model reduction
