电阻炉温度控制系统设计与实现大学毕业论文.docx

毕业设计说明书（毕业论文） 电阻炉温度控制系统设计与实现 摘  要 温度是工业生产中常见的和最基本的参数之一，一般物理变化和 化学变化的过程都与温度密切相关，因此生产过程中常需对温度进行 检测和监控。 实验室的回转式电阻炉是一个具有较大纯滞后和时间常数的温度 对象的特点，本设计根据这个特点选择了 PID 调节规律。根据设计要 求的控制精度选择了单回路控制系统。 本设计选用了两套设计方案，第一套方案是基于 DDZ—Ⅲ型仪表 设计的控制系统，在第一套方案中先组成开环系统测量温度对象特性， 并根据对象特性计算出 PID 控制器的控制参数。在做成闭环控制系统 之后，还需要手动调节 PID 参数，使 PID 参数达到最优。第二套是基 于数字仪表 PID 调节器设计的控制系统。所以第二套方案实施更为简 单方便，控制精度更高，所组成的系统也更加可靠。由于两套设计方 案的控制系统及控制规律一致，故在本设计中主要介绍了第一套方案。 关键词：电阻炉；PID；单回路控制系统 毕业设计说明书（毕业论文） Design and Realize Temperature Control System of Resistance Furnace Abstract Temperature is one of common and the most basic parameters in the industrial production. General physical and chemical changes have a close relationship with temperature, as a result, generally speaking, it is necessary to detect and monitor temperature during production. Type resistance furnace of laboratory is such a temperature object that has a bigger pure lagging and a temperature constant, the design chooses a PID adjustment principle. According to the control precise of design requirements, the design chooses a single circuit controlling system. The design chooses two design plans: of which the first one is a DDZ-III instrument-based control system, in which an open loop system is made up of to survey the features of the temperature object, with which calculate the control parameters of the PID controller, and after a close loop control system is made completely, it is necessary to adjust 毕业设计说明书（毕业论文） the parameters of the PID controller manually to get the best parameters for PID; the second one is a shimaden PID adjuster-based control system.Thus, the second plan is simpler and more convenient when implementing and is more precise when controlling. The system that is made up of the second plan is more reliable. As the control systems and controlling principles of the two design plans are consistent, the design focuses on introducing the first plan. Key words: resistance furnace; PID adjustment principle; single circuit controlling system. ～