【摘要】 分析了层流冷却系统中阀门的响应时间,推导出带钢样本跟踪长度的选择标准,定义了喷水组态跟踪精度—冷却水按照样本要求喷水组态喷射到相应的样本段上的准确程度。根据最优控制理论,分析了在升速轧制和恒速轧制条件下喷水提前长度的选择方法,结合国内几家热轧厂所配备的阀门系统,讨论了制约温度控制精度进一步提高的因素,提出通过反馈段采用高响应速度阀门提高温度控制精度的方案。实际应用结果表明,该层流冷却系统评价体系为提高温度的控制精度提供了很好的设计方法。更多还原

【Abstract】 The criterion of the strip tracking in laminar cooling system is presented based on the delay time of valves.The spraying position precision is defined which is equal to the time ratio between the time obtaining the needed spraying state and throughout the spraying bank time.The methods are given to select the length for compensating the valve delay time in constant and changing speed rolling according to optimal control law.The strategies are discussed to decrease the valve delay period in feedback laminar cooling system to realize the temperature control uniform in the rolling direction,referring the valves delaying time in some hot strip rolling companies.更多还原