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-在線瀏覽
2024-08-06 00:17本頁面
【正文】 e 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 dynamic quality of the object weaker and lead to the closedloop system instability. The differential error can get the trend of error change, and increasing differential control factoraccelerate the system response, but it will be sensitive to interference, and reducing the antijamming ability of the system.. Intelligent PID control rulesBecause the PID algorithm gets the desired effect only when the system model parameters are nondenaturing, when a okay PID controller is applied in the model parameters timechanging system, its capability can bee difference which parameters are adjusted well, and even instability. Therefore, the intelligent PID controller parameters can only be got by many times calculation according to the factsituation. A system allows for the maximum deviation , minimum deviation , so the PID control rules of system as follow:Rule 1:IF︱︳ THEN = (k)。To eliminate the frequent motion and not affect precision temperature control, the rule 2 set a dead zone for temperature deviations. Rule 3:IF︱︳ THEN=+ []+。 stopping bits: 1。 parity bits: none. XMT624 defines input, output and state parameters, and assigns the address. The main parameters as listed in Table 1: With the development of intelligent control theory, PID control technology is more and more mature. The intelligent PID algorithm is nonlinear, which can be used to conquer the limitation of the traditional PID. The rule 1 and rule 2 can make the system fast.Three basic parameters of the PID controller can be directly read and wrote in the corresponding address through the PC interface, so it is controlled expediently. When read and write parameters, firstly, we should know the parameters’ code. The reading parameters’ code is 03 and the writing parameters code is 10H. For example, reading measurements PV, the data format sent by the main frame is shown as Table
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