一种基于有限测点数据的地面目标瞬态温度场快速预测方法  

A fast method for predicting transient temperature field of ground target based on limited measuring point data

作　　者：陈颖 任登凤[1,2] 韩玉阁[1,2] Chen Ying;Ren Dengfeng;Han Yuge(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;MIIT Key Laboratory of Thermal Control of Electronic Equipment,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094 [2]南京理工大学电子设备热控制工信部重点实验室,江苏南京210094

出　　处：《红外与激光工程》2023年第11期172-187,共16页Infrared and Laser Engineering

摘　　要：传统的地面目标红外辐射特性研究方法有理论建模分析法和外场测试法。由于大部分的理论建模计算量庞大,无法满足实时计算;外场测试往往成本较高,无法获得任意时刻地面目标整体的红外辐射特性。典型部位温度可以实时获得,但如何布置传感器使其更好地反映和预测整体的温度分布需要开展研究。文中引入本征正交分解(proper orthogonal decomposition,POD)方法对两种地面目标的温度场进行模态分析,建立两种地面目标的温度场降阶模型,利用降阶模型实现地面目标温度场的快速预测;将温度场的降阶模型与QR (orthogonal right triangular)分解算法结合,确定最佳传感器测量位置,实现对两种地面目标温度场的预测。研究结果表明,无论是POD温度场降阶模型还是通过QR分解算法得到的最佳传感器测量数据进行预测,二者的精度均较高,正方腔体的平均绝对误差均小于1.5 K,模型坦克的平均绝对误差均小于2.5 K。通过分解算法得到的最佳传感器测量数据进行预测效率更高,未来可利用该方法预测目标红外特性,从而支撑目标规避或伪装方案的制定。Objective With the development of infrared guidance technology,the ground targets with obvious infrared characteristics are increasingly threatened on the battlefield.In order to improve the survivability of ground targets on the battlefield,it is necessary to master the infrared radiation characteristics of ground targets.The traditional methods for studying the infrared radiation characteristics of ground targets include theoretical modeling analysis method and field testing method.The theoretical modeling analysis method is faced with such problems as a huge amount of calculation,high cost of field testing,obtained limited data,and being unable to obtain the overall infrared radiation characteristics of ground targets at any time.For the ground target,if the thermocouple is arranged on the typical part of the surface of the ground target and the relationship between the typical part and the overall temperature distribution is established,the rapid prediction of the temperature field of the ground target can be achieved.Therefore,how to arrange thermocouple on the surface of ground target and establish the relationship between the data of finite measuring points and the whole temperature field of ground target has become an urgent problem to be solved.Therefore,proper orthogonal decomposition(POD)method is introduced to extract the characteristics of the ground target temperature field,and a reduced order model of the temperature field is established.On this basis,combined with QR(orthogonal right triangular)decomposition algorithm,the rapid prediction of the temperature field of the ground target is realized by using the data of finite measuring points.Methods POD method is introduced into temperature field characteristics analysis of ground targets,and the specific implementation process is shown(Fig.1).Taking square cavity and model tank as the research objects,POD method was used to extract the temperature field characteristics of ground targets,and two kinds of ground target temperature field reduction mod

关 键 词：地面目标 本征正交分解 有限测点数据 快速预测 

分 类 号：TN219[电子电信—物理电子学]