热轧带钢需要更加灵活的冷却控制策略，保证带钢能够按照设定的冷却路径冷却，以充分发挥冷却过程的相变、析出等强化功能。为此，提出了基于温度观测器的带钢温度控制方法，通过物理模型构造温度观测器在线观测带钢温度并根据测量温度在线修正观测器模型参数。在此基础上应用最优控制方法，实时优化各个冷却单元阀门设定，保证温度观测器估计值与目标温度分布曲线设定值偏差最小。实际应用结果表明，该方法能够较好的控制带钢温度，同时能够克服固定冷却制度的限制，实现冷却路径控制。
For hot rolled strip,a more flexible cooling control strategy is required to make the strip cooled according to the cooling path set in advance,and consequently take full advantage of the phase transformation and precipita-tion strengthening during the cooling process.Thus,a new method based on temperature observer for strip tem-perature control was proposed,in which strip temperature observer based on physic models was developed to mo-nitor the strip temperature and,at the same time,the model parameters of the observer were revised according to the measured temperature.On this condition,an optimal controller was applied to optimize the valves setting in each cooling unit,as well as to ensure the minimum deviations between the observed temperature distribution curve and the desired one.Practical application shows that this method can not only control the strip temperature accurately,but also overcome the limitations of fixed cooling pattern and fulfill the obj ective of cooling path con-trol.
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