For big hysteresis control , response time is long and overmodulation is big , but dynamic performance figure is not good when we only use pi controller 。 so , i try to design the whole control project which composed of the vapor wraps water level control system and combustion control system use the control equipment of double cross - parameter fuzzy - pi controller 单独采用pi控制,对大滞后控制,响应时间及超调很大,但动态性能指标差。因此,尝试采用双交叉参数fuzzy - pi控制器。组成了汽包水位和燃烧双交叉参数自调整fuzzy ? pi组合控制器的整体控制方案。