纯滞后系统控制器分析与设计毕业论文设计.doc

哈尔滨商业大学德强商务学院毕业论文（设计） PAGE PAGE IV 毕业论文设计 纯滞后系统控制器分析与设计 摘 要 在工业生产中，被控对象除了容积延迟外，通常具有不同程度的纯延迟。例如，气体物料、液体物料通常经过管道传送，固体物料往往通过传送带传送。当利用改变物料的流量等调节生产过程时，经过输送环节的传送时间（滞后）后，物料的变化情况才能到达生产设备进而实现工艺参数的改变。这个输送过程的传送时间是一个纯滞后时间。再如，在热交换过程中，经常将被加热物料的输出温度作为被控制量，而把载热介质（如过热蒸汽）的流量作为控制量，载热介质流量改变后，经过一定时间才表现为输出物料温度的变化。系统的这种表现可用含有纯滞后的传递特性描述。在过程控制中，被控对象具有滞后特性是普遍现象，一般在滞后不显著时，为了简化控制系统而忽略滞后的影响。当滞后特性显著以至影响系统控制品质时，则应对滞后特性进行有针对性的控制。 通过纯滞后系统中的分析与设计来具体分析常规模糊控制器。利用了二阶纯滞后惯性环节进行了计算机仿真。 关键字：被控对象；纯滞后；自适应。 Pure delay system controller analysis and design Abstract In industrial production, was charged with targeting not only volume of deferred, often with different degrees of pure delay. For example, the gas material, liquid material is usually transmitted through the pipeline, solid material is often transmitted through the conveyor. When the use changes such as regulating the flow of materials, production process, through the transmission link transmission time (delay), the material changes to reach the production equipment and thus achieve the process parameters change. The transport process transfer time is a pure time lag. Again, in the heat exchange process, the often heated material temperature as the output volume to be controlled, while the heat-carrying medium (such as superheated steam) flow as a control volume containing the heat medium flow rate after the change, after a certain period of time before the performance of for the output material temperature changes. This performance of the system contains a pure delay delivery available characterization. In the process control, was charged with a lag characteristics of the object is a common phenomenon, generally not significant lag, in order to simplify the control system and ignore the impact of lag. When the hysteresis significantly affect the system as well as quality control, then the response lag characteristics of targeted control. the analysis of the system with time delay is designed to specific analysis of the conve