在计算机中实现三角函数的硬件解算方法

A function calculating the hardware implementation of the fire control computer

摘要:

针对目标跟踪中大量存在的三角函数运算,提出在火控计算机中建立三角函数解算单元,采用硬件实现三角函数解算的设想。而三角函数解算单元是一种可以完成正弦函数解算功能的函数芯片。它的设计核心是以角度值为地址,通过硬件查表计算,可对0到90度的正弦函数值进行查表。查表精度可设计到0.001°,最大查表时间即为函数值的解算时间。余弦查表计算是采用正弦同一芯片,可以根据相位差90度的关系进行查表。实践表明三角函数的硬件解算速度快,精度高,可以替代通常方法的函数解算。因此,如果在火控系统中,设计一个地址译码器电路,就可建立多个三角函数芯片解算单元,通过计算机数据指令,实现对多个三角函数值的并行计算,从而提高系统对多个目标的快速跟踪处理能力。

Abstract:

aiming at the existence of target tracking in a large number of trigonometric function calculations, puts forward to establish trigonometric functions in the fire control computer calculating unit, trigonometric function is realized by using hardware decoding. And trigonometric function calculating unit is a kind of can complete sine function calculating function function of the chip. Its core design is based on Angle value address, through hardware look-up table, Value of 0 to 90 degrees of sine function, look-up table. Table look up precision can design to 0.001 °, maximum look-up table of time is the function of calculating time. Look-up table of time is the biggest function value calculation of time. Cosine look-up table calculation is to use sine the same chip, can look up table according to the relationship between phase difference of 90 degrees. Practice shows that trigonometric function of hardware decoding speed fast, high precision, the common method can replace the function of calculating. So, if in the fire control system, design an address decoder circuit, can create multiple trigonometric function calculating unit chip, Through computer data, instructions, the realization of parallel computing for multiple trigonometric function value, thus improve the system of multiple target fast track processing capacity.