本文選題：風(fēng)電葉片 + 激振系統(tǒng)��； 參考：《工程科學(xué)與技術(shù)》2017年01期

【摘要】：風(fēng)電葉片逐漸向大型化方向發(fā)展,為了提高大型風(fēng)電葉片疲勞試驗(yàn)的激振能力、縮短測試周期,兩激振源聯(lián)振已成為疲勞測試方法中具有前景的發(fā)展方向。首先進(jìn)行兩激振源的耦合特性試驗(yàn),設(shè)計(jì)了激振源轉(zhuǎn)速、相位和葉片振幅的測試方案。當(dāng)2個(gè)激振源初始轉(zhuǎn)速設(shè)定為35 r/min時(shí),風(fēng)電葉片在該激振源作用下進(jìn)行試驗(yàn),得出2個(gè)激振源轉(zhuǎn)速差在±5 r/min范圍內(nèi)波動(dòng)、相位也存在耦合現(xiàn)象,葉片振幅變化絮亂。為了提高兩激振源的同步效果,在分析現(xiàn)有控制策略的基礎(chǔ)上,采用并聯(lián)交叉耦合結(jié)構(gòu),開發(fā)了滑模變結(jié)構(gòu)同步控制算法,并利用李雅普諾夫函數(shù)證明了該算法的漸近穩(wěn)定性。最后,搭建了一套10 MW級大型風(fēng)電葉片疲勞試驗(yàn)平臺(tái),開發(fā)了基于分布式網(wǎng)絡(luò)總線的疲勞激振控制系統(tǒng),將該滑膜變結(jié)構(gòu)控制算法應(yīng)用于aeroblade 2.0~54.38風(fēng)電葉片兩點(diǎn)激振試驗(yàn)。試驗(yàn)結(jié)果表明,在兩激振源轉(zhuǎn)速均為35 r/min時(shí),兩激振源的轉(zhuǎn)動(dòng)步調(diào)一致,相位也能基本保持同步,此時(shí)葉片振幅最大,且非常穩(wěn)定。在不同的初始速度驅(qū)動(dòng)下,分別設(shè)定為40和30 r/min,2個(gè)激振源的轉(zhuǎn)速均能快速跟隨并分別保持。由于兩者轉(zhuǎn)速不一致,導(dǎo)致葉片振幅發(fā)生波動(dòng)。上述試驗(yàn)結(jié)果表明,雖然2個(gè)激振源之間的機(jī)電耦合是固有存在的,但是設(shè)計(jì)的滑模變結(jié)構(gòu)控制算法能使2個(gè)激振源的轉(zhuǎn)速、相位步調(diào)一致,具有良好的魯棒特性,有效地保證了疲勞試驗(yàn)的順利進(jìn)行。
[Abstract]:Wind turbine blades are gradually developing towards large scale. In order to improve the excitation ability of large scale wind turbine blades and shorten the test period, the combined vibration of two exciting sources has become a promising developing direction in fatigue testing methods. First, the coupling characteristics of the two exciting sources are tested, and the measurement scheme of the rotating speed, phase and blade amplitude of the exciting source is designed. When the initial speed of the two exciting sources is set at 35 r/min, the wind turbine blade is tested under the action of the excitation source. The results show that the speed difference of the two exciting sources fluctuates in the range of 鹵5 r/min, the phase also exists coupling phenomenon, and the variation of the blade amplitude is chaotic. In order to improve the synchronization effect of the two excitation sources, a sliding mode variable structure synchronization control algorithm is developed based on the analysis of the existing control strategies and the parallel cross coupling structure. The asymptotic stability of the algorithm is proved by using Lyapunov function. Finally, a fatigue test platform of 10 MW large-scale wind turbine blade is built, and the fatigue excitation control system based on distributed network bus is developed. The synovial variable structure control algorithm is applied to the two-point excitation test of aeroblade 2.0 ~ 54.38 wind power blade. The experimental results show that when the rotational speed of the two exciting sources is both 35 r/min, the rotation of the two exciting sources is consistent and the phase can be kept in sync basically. The amplitude of the blade is the largest and the blade is very stable. At different initial speeds, the speed of the two exciting sources can be quickly followed and maintained at 40 and 30 r / min, respectively. Because of the inconsistency of the two rotational speed, the amplitude of the blade fluctuates. The experimental results show that although the electromechanical coupling between the two exciting sources is inherent, the sliding mode variable structure control algorithm can make the speed and phase of the two exciting sources consistent and have good robustness. The fatigue test is carried out successfully.
【作者單位】： 山東理工大學(xué)機(jī)械工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51405275) 山東省自然科學(xué)基金資助項(xiàng)目(ZR2016EEM20)
【分類號】：TM315

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