電氣專業(yè)畢業(yè)設(shè)計外文翻譯---單一的神經(jīng)網(wǎng)絡(luò)pi控制高可靠性直線電機磁浮-電氣類-資料下載頁
2025-05-11 20:27本頁面
【導(dǎo)讀】等效電路模型可以用作LIM的二次磁場定向控制。性通過模擬實驗被證實。線性鼠籠電機是在低速磁浮系統(tǒng)中作為耐熱系統(tǒng)，來驅(qū)動車輛。之所以有終端效應(yīng)取決于它獨特的裝置。由動力學(xué)終端效應(yīng)產(chǎn)生的渦流動。力導(dǎo)致了線性電機的額外損失，從而減少了推動力。當矢量控制策略應(yīng)用。完善控制系統(tǒng)的整體性能。智能控制方法被用來解決人力所難以操作的問題。間間隙中滲透密度的逐漸積聚。在二級板塊的進口端和出口端，因為磁通。量的突然轉(zhuǎn)變，會產(chǎn)生渦流，這種感應(yīng)電流可以避免氣隙磁場的突然改變。因為T1=Lr1/Rr的值很小，故可以忽略。二級渦流可以迅速的達到一級。勵磁電流，而一級電流的渦流階段則相反。瞬態(tài)過程見圖，終端效應(yīng)可以添加到等效電路中。一級和二級之間的相對速度決定了氣隙磁場的分布。在T2時間，一級的移動長度為νT2。LIM的輔助驅(qū)動是由于它簡單的構(gòu)造。的滲漏磁力流很大，所以很難有一個精確的LIM模型。
【正文】 ??? kekekekx where xi(k) (i=1, 2, 3) stand for integral unit, proportional unit and differential unit of normal PID adjustor. The output of controller is ? ? ? ? ? ? ? ? ? ? ????????? ?? ?? 3 13 1 /1 i kii ii kxkKkuku ?? (21) where |u(k)|≤Umax, Umax is the maximum of limitation, equal to the 17 maximum given pull of linear motor. The weight factor is ? ? ? ? ? ?krkk iiii ??? ??? 1 ， (22) where ? ? ? ? ? ? ? ?kxkukekr ii ? 。 shows the block diagram of secondaryflux oriented control model, which consists of a LIM (Takahashi and Ide, 1993), a speed feedback control loop with single neuron control PI unit, a PWM voltage source translator, and vector control translation ponents. ASR: Speed regulator。 ATR: Torque regulator。 AψR: Flux regulator。 SFB: Speed feedback unit RESULTS AND CONCLUSIONS Based on the above analysis of mathematics model and control arithmetic, a simulation for LIM is performed. Comparison between single neuron PI adjustment and normal PI adjustment has been performed. The LIM used in the serve system is threephase Yconnected twopole kW 50 Hz 380 V type. The parameters of LIM are: Rs= Ω, Rr= Ω, Ls= H, Lm= H, Lr= H, τ= m. presents simulation result by LIM model discussed above. 18 shows the parison of speed tracking with normal PI unit and single neuron work PI unit. From the simulation, it can be concluded that the speed response of the single neuron work PI adjustment is fast, and the steadystate error is step response, the speed fluctuation is small. In this paper, an equation circuit considering the dynamic end effect of LIM is discussed, which is suitable for the large end effect condition. The model for vector control has been presented. Single neuron work PI unit is introduced for LIM servodrive. The simulative conclusion shows that the end effect can be pensated by this model, and the control system performance is improved. The single neuron work PI unit is suitable for the control arithmetic design. 19 V: Set up speed。 V1: Trace speed with PI unit。 V2: Trace speed with single neuron work PI unit 20 參考文獻 Boldea, I., Nasar, ., 1999. Linear electric actuators and generators. IEEE Trans. on Energy Conversion, 14(3):712717. [doi:] Duncan, J., Eng, C., 1983. Linear induction motorequivalentcircuit model. Proc. IEE, 130(1):5157. Sung, J., Nam, K., 1999. A New Approach to Vector Control for a Linear Induction Motor Considering End Effects. Conference Record of the IEEE IAS Annual Meeting’1999, 4:22842289. Takahashi, I., Ide, Y., 1993. Decoupling control of thrust and attractive force of a LIM using a space vector control inventor. IEEE Trans. Ind. Appl., 29(1):161167.[doi:] Wu, ., 2020. Maglev Vehicle. Shanghai Science and Technology Press, Shanghai (in Chinese). Ye, ., 2020. Linear Motor and Its Control. Machine Press,Beijing (in Chinese).
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