内燃机燃烧过程仿真计算的双精度系统设计  

Designing Double-precision Calculating System for Simulating In-cylinder Combustion

作　　者：刘金武[1] 杨靖[2] 高为国[1] 倪小丹[1] 黄麓升[1] 

机构地区：[1]湖南工程学院机械电子工程系,湖南湘潭411101 [2]湖南大学机械与汽车工程学院,湖南长沙410082

出　　处：《湖南工程学院学报（自然科学版）》2004年第2期40-43,共4页Journal of Hunan Institute of Engineering(Natural Science Edition)

摘　　要：缸内燃烧仿真计算双精度系统由8种类型的约100个双精度子系统程序块组成.它们分别是主程序块、子例行程序块、函数子程序块、内部函数块、公共区块、数据文件块和数据库块.每个程序块可以通过隐含双精度定义,双精度类型说明或常数双精度指数表示实现双精度计算.在-1.0×1038～1.0×1038且保留7位小数的取值范围内,输入和输出数据不受数据类型的影响,单精度和双精度可以互换通用以提高仿真效率.The double-precision calculating system for simulating in-cylinder combustion consists of about 100 sub-systems that can be sorted into 8 kinds.They are main program,subroutines,functions,intrinsics,block data ,commons and data files.There are three methods by which the double-precision can be realized by every program block.First of all,an implict double-precision must be definited.Secondly, double-precision should be used in condition to the inverse I-N rule.Finally,the exponent forms of double-precision data will also be applied to constant data.Moreover,in the limit of -1.0*10^(38)～1.0*10^(38) and 7 digits decimal data, the simulation results will not be affected by the type of input and output data. The simulating efficiency can be enhanced by using single and double precision freely in input and out put data formats.

关 键 词：缸内燃烧 仿真计算 双精度变量 系统设计 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]