有罩雷达目标表面温度场求解方法
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摘要
针对雷达目标在军事打击的重要战略地位,提出了一种有罩雷达目标表面温度场求解方法。首先,对雷达目标的结构特性进行分析,在此基础上将有罩雷达目标简化为椭球目标;其次,对雷达目标三维温度场进行建模,在球坐标系下建立瞬态热传导方程,分析边界条件,建立热平衡模型;最后,对雷达目标表面温度场模型及边界条件进行简化,提出了基于降维有限差分的迭代法,对目标表面温度场进行数值求解。利用文中算法得到的温度场分布及生成的红外仿真图像,符合实际情况,其温度变化规律与实际一致,建立的温度场模型及求解方法切实可行,为进一步研究目标红外辐射特性提供了基本参数和理论依据。
A method of shrouded radar target surface temperature field calculation was proposed in this paper, in allusion to the important strategic position of radar target during military attack. Firstly, the structural characteristic of radar target was analyzed, based on which radar target was simplified into spheroid. Secondly, radar target three-dimensional temperature field model was established, including building heat balance equation in spherical coordinates, analyzing boundary conditions, establishing thermal equilibrium model. Finally, through simplifying the surface temperature field model and the boundary condition of the radar target, target surface temperature field was obtained by solving the temperature field model, and a method based on reduced dimension finite difference iterative was proposed. The experimental results show that the calculated distribution of temperature field and the generated infrared simulation images accorded with actual situation, and temperature variation was consistent with the actual, so the temperature field model established and solution method were feasible, which provided basic parameters and theoretical basis for further study on the target infrared radiation characteristics.
A method of shrouded radar target surface temperature field calculation was proposed in this paper, in allusion to the important strategic position of radar target during military attack. Firstly, the structural characteristic of radar target was analyzed, based on which radar target was simplified into spheroid. Secondly, radar target three-dimensional temperature field model was established, including building heat balance equation in spherical coordinates, analyzing boundary conditions, establishing thermal equilibrium model. Finally, through simplifying the surface temperature field model and the boundary condition of the radar target, target surface temperature field was obtained by solving the temperature field model, and a method based on reduced dimension finite difference iterative was proposed. The experimental results show that the calculated distribution of temperature field and the generated infrared simulation images accorded with actual situation, and temperature variation was consistent with the actual, so the temperature field model established and solution method were feasible, which provided basic parameters and theoretical basis for further study on the target infrared radiation characteristics.
引文
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[2]Ji Yuanyuan.Study on key techniques of simulation for infrared characteristics of typical ground objects[D].Dalian:Dalian Maritime University,2014.(in Chinese)季园园.典型地物红外特性仿真关键技术研究[D].大连:大连海事大学,2014.
[3]Fan Yongjie,Jin Weiqi,Liu Chongliang.New progress on FLIR imaging system[J].Infrared and Laser Engineering,2010,39(2):189-194.(in Chinese)范永杰,金伟其,刘崇亮.前视红外成像系统的新进展[J].红外与激光工程,2010,39(2):189-194.
[4]Cheng Shengyue,Liu Zhaohui,Deng Zhiping,et al.Research progress on infrared characteristic of military target[J].Infrared Technology,2014,36(7):577-581.(in Chinese)成声月,刘朝辉,邓智平,等.军用目标红外辐射特征研究进展[J].红外技术,2014,36(7):577-581.
[5]Chen Shan,Sun Jiyin,Chen Jie.Temperature field characteristics of oilcan target surface[J].Infrared and Laser Engineering,2011,40(1):17-21.(in Chinese)陈珊,孙继银,陈捷.油罐目标表面温度场特性研究[J].红外与激光工程,2011,40(1):17-21.
[6]Zhang Runkui,Qi Renxin,Zhang Shuxiong,et al.Radar Structure and Technics[M].Beijing:Publishing House of Electronics Industry,2007.(in Chinese)张润逵,戚仁欣,张树雄,等.雷达结构与工艺[M].北京:电子工业出版社,2007.
[7]Lv Xiangyin,Jin Wei,Yang Li.Infrared stereo feature of ground target[J].Infrared and Laser Engineering,2014,43(9):2810-2814.(in Chinese)吕相银,金伟,杨莉.地面目标红外立体特征[J].红外与激光工程,2014,43(9):2810-2814.
[8]Li Yingjie,Lv Xiangyin,Wu Xiaodi,et al.Calculation of infrared radiation of space target using finite difference method[J].Infrared and Laser Engineering,2010,39(2):218-222.(in Chinese)李颖杰,吕相银,吴晓迪,等.利用有限差分法计算空间目标红外特征[J].红外与激光工程,2010,39(2):218-222.
[9]Ren Liang,Chen Qian,Qian Weixian.Infrared target modeling and simulation based on ANSYS[J].Infrared and Laser Engineering,2013,42(6):1426-1431.(in Chinese)任亮,陈钱,钱惟贤.基于ANSYS的目标红外特性建模与仿真方法[J].红外与激光工程,2013,42(6):1426-1431.
[10]Cao Jiang.Numerical calculation on thermal field of an induction generator[J].Explosion-Proof Electric Machine,2014,49(1):11-14.
[11]Wang Chong,Qiu Zhiping.Interval finite difference method for steady-state temperature field prediction with interval parameters[J].Acta Mechanica Sinica,2014,2(1):161-166.
[12]Chen Shan,Sun Jiyin.IR scene simulation based on visual image[J].Infrared and Laser Engineering,2009,38(1):23-26.(in Chinese)陈珊,孙继银.基于可见光图像的红外场景仿真[J].红外与激光工程,2009,38(1):23-26.