畢業(yè)論文外文翻譯-基于智能pid調(diào)節(jié)的連續(xù)燒結(jié)爐溫度控(編輯修改稿)
2024-07-23 00:17 本頁面
【文章內(nèi)容簡介】 to sintering furnace using filament resistance, cooling is relying on the natural environment, and if the temperature is high, it is difficult to cool down.It is difficult to establish precise mathematical method and determine the model parameters, and unable to control the temperature effectively. Computers and the development of intelligent control theory provide a new approach for the plex control and dynamic uncertainty systems. Using intelligent control technology promotes intelligent PID control.2. Control system frameThe temperature control system of multisegment continuous sintering furnace is mainly consisted of PC and XMT624 intelligent instrument, the executing agency is solidstate relay. The furnace is divided into three segments to control temperature, which means that each segment of the furnace has three temperature points. The frame of temperature control of the continuous sintering furnace is shown as figure 1.In allusion to every temperature section and every temperature point of the sintering furnace, adopt intelligent PID control solely. XMT624 according to the setting value and the reading measurement value calculates temperature deviations, and then intelligent PID controller controls solid state relay erroroff time to control furnace temperature and stability in the setting value. 3. Control algorithmIntelligent PID control algorithm [56] is the control algorithm base on conventional PID control algorithm for the object that has characteristic of delay, timevarying and nonlinear systems, and in different segments has different algorithm. It has both BangBang fast control and the lag control stability control and antijamming capability.As intelligent PID control algorithm is not dependent on the mathematical model, and is not sensitive to changes in parameters, therefore is more suitable for field use.. PID algorithm to achieve the figuresIn the analog system, the expression of PID algorithm is: （1） Discrete equation (1), digital form of differential equations instead of the continuous system differential equations, differential and integral can be expressed using sum and incremental form: （2） （3）Under the principle of recursion may write PID output expression with k: （4）In the equation (4), =/T is integral coefficient, =/T d is differential coefficient. So the differential equation of PID can be expressed: （5）In the equation (5), is control value, is deviation, is proportion factor, is integration control factor, is differential control factor.Once the system generates error, PID controller immediately works to make the object reduce errors, the strength and feebleness of control function depend on proportion factor , and its limitation is existing static error for control objects with selfbalancing ability. Increasing value can reduces static errors, but the big value has led to the dynamic performance of the system weaker.Integral memory error helps the system eliminate static errors, but the limitation of integral role is that makes a control system have lag characteristics. If the integral role is too strong, it would make dy
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