variable offset meaning in English

可变的偏置值

First , the working principles of the combustion control system of marine main boiler in present use and its disadvantages are discussed in the paper ; in the light of the structure and motion traits of marine main boiler , the combustion control systems of single and double cross amplitude limits are designed . at the same time , the schematic diagram of system and recovery curves of some relative parameters are given , the system working principles and its advantages and disadvantages are discussed . based on the combustion control system of dual - crisscross amplitude limit , by selecting the independent variable , the fixed offset is improved into variable offset , the combustion control system of variable offset dual - crisscross amplitude limit is designed
首先讨论了目前船用主锅炉燃烧控制系统的工作原理及存在的不足；针对船用主锅炉的结构及运行特点，设计了单交叉限幅燃烧控制系统和双交叉限幅燃烧控制系统，同时给出了系统原理图及有关参数的过渡过程曲线，讨论了系统工作原理及优缺点；在双交叉限幅燃烧控制系统的基础上，将固定偏置经过自变量的选取，改进成变偏置，设计了变偏置双交叉限幅燃烧控制系统，给出了系统原理图及有关参数的过渡过程曲线，同时也给出了空气压力和燃油流量正负偏置函数与变偏置折线函数的关系式。