基于残差修正的涡轮增压机组差异演化建模与降负荷特性分析  

Differential Evolutionary Modeling with Residual Correction and Down-load Characteristic Analysis for Marine Turbocharged Unit

作　　者：倪何[1] 肖航[1] 曾凡明[1] 孙丰瑞[1] 

机构地区：[1]海军工程大学动力工程学院,武汉430033

出　　处：《上海交通大学学报》2015年第5期620-625,632,共7页Journal of Shanghai Jiaotong University

基　　金：中国博士后科学基金资助项目(2013T60921)

摘　　要：针对船用增压锅炉涡轮增压机组的建模与运行特性分析问题,提出了一种基于差异演化算法和残差修正的演化建模方法.在涡轮增压机组机理模型的基础上,采用差异演化算法辨识模型参数,利用原始数据和所建模型的残差进行修正,避免了采用经验值或理想状态下的实验数据作为模型参数所造成的偏差,在所建模型和已有增压锅炉涡轮增压机组模型的基础上进行仿真实验,研究了涡轮增压机组在快速降负荷过程中的动态特性,并通过仿真结果与原始数据的对比验证了其可靠性.结果表明:在给定的模型空间和参数范围内,采用残差修正的差异演化算法能够自动生成同时满足实时性和精度要求的显性模型;通过对仿真结果分析发现,相对于锅炉,涡轮增压机组在快速降负荷过程中出现了明显滞后的现象,甚至可能导致锅炉熄火.For the modeling and operation characteristic analysis of marine turbocharged unit, an improved differential evolutionary modeling method with residual correction was designed in this paper. This method adopted the differential evolution algorithm to identification model parameters based on the mechanistic model of turbocharged unit, and then used the residuals of original data and model outputs to correct er- rors, which avoided the deviation caused by experience or experimental data under ideal state. Simulation experiments were conducted based on this model and existing supercharged model to studied the dynamic characteristics of turbocharged unit in past-down load process. The comparsion of the simulation result with the original data proved that the differential evolution algorithm with residual correction could auto- matically generate dominant model that met real-time and accuracy requirements in a given model space and parameter ranges. Further analysis of simulation results showed that there was ignificant lag of turbo- charged unit in the past-down load process.

关 键 词：涡轮增压机组 差异演化 残差修正 降负荷特性 

分 类 号：TK229.5[动力工程及工程热物理—动力机械及工程] TP391.9[自动化与计算机技术—计算机应用技术]