【正文】
will have be slowed down before it reaches the specified value or have long period of oscillation. The membership function used in this paper for the fuzzification is of a triangular type. The function can be expressed as )(1)( waxwxu ???? (2) where w is the distribution span of the membership function, x is the fuzzy input variable and a is the parameter corresponding to the value 1 of the membership function. The height method is employed to defuzzify the fuzzy output variable to obtain the control voltage of the SCR heater driver of Table 2 Fuzzy rules table for the heater this temperature control system. The relevant equation is )(, jj ijiiii xAwwywy ??? ?? ? (3) Whereμ Aij(xj) is the linguistic value of the fuzzy set variable and ωi is the weight of the corresponding rule which has been activated. Уi is the resulting fuzzy control value of the ?th fuzzy rule and у is the fuzzy control action. The fuzzy controller output calculated from this equation determines the control voltage of the SCR driver in each control step. 。本 文使用的隸屬函數(shù)是三角形的隸屬函數(shù)。此外,系統(tǒng)的熱量均衡控制電壓包括模糊控制規(guī)則表去代替附加的控制算法的補(bǔ)償,簡化控制器的設(shè)計問題和控制法則的計算。每一個增益參數(shù)都有確定的動態(tài)響應(yīng)的變化范圍。對于這個溫度控制系統(tǒng),粗調(diào)的話 ge =5,gce =2 微調(diào) ge =2,gce =1 可以被應(yīng)用到不同的溫度設(shè)定值。另一方面,當(dāng)誤差接近隸屬函數(shù)零的子集時,控制器就應(yīng)該提供微調(diào)以改變溫度誤差并減少超調(diào)的趨勢。 中北大學(xué) 2020 屆畢業(yè)設(shè)計說明書 第 2 頁 共 12 頁 每一條控制規(guī)則輸出的重要性依賴于輸出輸出語言變量的隸屬函數(shù)。這里給出的不需要特定模型的增益規(guī)劃的模糊控制策略將會解決這個問題。中北大學(xué) 2020 屆畢業(yè)設(shè)計說明書 第 1 頁 共 12 頁 增益規(guī)劃的模糊溫度控制器的單向輸入系統(tǒng) 摘要 :在許多化工和半導(dǎo)體的生產(chǎn)過程中,溫度是獲得所需產(chǎn)品質(zhì)量的一個非常重要的控制參數(shù)。因此,怎樣設(shè)計一個通用的溫度控制器擁有很小的超調(diào)、快速的響應(yīng)特性將會是一個挑戰(zhàn)性的研究課題。 A1 , A2 和C1 是系統(tǒng)相應(yīng)的輸入輸 出論域的子集。人類的直覺 ,當(dāng)溫度誤差大增大時控制電壓應(yīng)該增 加 ,以提供更多的能量來加熱溫度控制腔和減少誤差。 然后,相同的價值可以應(yīng)用到不同的溫度設(shè)定階躍響應(yīng)和適當(dāng)?shù)姆€(wěn)態(tài)精度。它需要反復(fù)的測試工作去尋找合適的給定的溫度的增益變化范圍,例如, 5080 度, 80120 度, 120150 度,等等,這些參數(shù)的取值不是很重要。這種控制策略可以根據(jù)反饋的控制信號 e 和 ce,通過切換隸屬函數(shù)的不同論語,自動的在不同的控制范圍之間切換。否則,溫度響應(yīng)的速度在達(dá)到給定值之前將會變慢或是將會有一個非常長遠(yuǎn)的調(diào)節(jié)階段。 temperature control and oneway input. Gainscheduling fuzzy logic controlle Since this temperature control system has obvious timedelay and oneway input nonlinear behaviour, it is difficult to establish an appropriate dynamic model for the precise modelbased controller design. In addition, the overshoot transient response of the temperature control system, with timedelay and singlephase heating input dynamic features, is difficult to avoid and eliminate quickly. Hence, how to design a generalpurpose temperature controller with