风电叶片双向惯性式疲劳加载系统及控制研究
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摘要
设计一种电驱动双向惯性式风电叶片疲劳加载系统,基于能量法对系统动力参数匹配及优化计算。在考虑机电耦合影响基础上,提出基于虚拟主令相邻偏差耦合同步疲劳加载控制策略,并对算法的稳定收敛性进行分析,利用Matlab进行试验验证。现场试验结果表明系统控制效果较好,通过控制可消除机电耦合作用带来的固有相位差,并能较好的维持同步状态,叶片振幅误差保持在5%之内,试验精度与效率得到提高,为风电叶片检测与分析提供一种的实用手段。
The electric biaxial inertia type wind power blade fatigue loading system has been designed. Based on energy method, system dynamic parameters were matched and optimization calculated. On the basis of considering electromechanical coupling effect,based on the virtual host to adjacent coupling synchronization deviation fatigue load control strategies was put forward,and analyses the stability and convergence of algorithm. The effectiveness of the simulation model integrated numerical simulation algorithm was established by Matlab. Finally,the amplitude deviation and loading frequency were used as input and output to establish the control system for experimental verification. The test results show that the system control effect is good,through control can eliminate the electromechanical coupling effect of the inherent phase difference,and can better maintain synchronization state. Blade amplitude error within 5%stiffness not change obviously in the whole process of fatigue loading process. The test precision and efficiency is improved,and provides a theoretical and experimental basis for the wind power blade fatigue loading engineering application.
The electric biaxial inertia type wind power blade fatigue loading system has been designed. Based on energy method, system dynamic parameters were matched and optimization calculated. On the basis of considering electromechanical coupling effect,based on the virtual host to adjacent coupling synchronization deviation fatigue load control strategies was put forward,and analyses the stability and convergence of algorithm. The effectiveness of the simulation model integrated numerical simulation algorithm was established by Matlab. Finally,the amplitude deviation and loading frequency were used as input and output to establish the control system for experimental verification. The test results show that the system control effect is good,through control can eliminate the electromechanical coupling effect of the inherent phase difference,and can better maintain synchronization state. Blade amplitude error within 5%stiffness not change obviously in the whole process of fatigue loading process. The test precision and efficiency is improved,and provides a theoretical and experimental basis for the wind power blade fatigue loading engineering application.
引文
[1]李德源,莫文威,严修红,等.基于多体模型的水平轴风力机气弹耦合分析[J].机械工程学报,2014,50(12):140-150.[1]Li Deyuan,Mo Wenwei,Yan Xiuhong,et al.Aeroelastic analysis of gorizontal axis wind turbine based on multi-body model[J].Journal of Mechanical Engineering,2014,50(12):140-150.
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[10]Shamsaei N,Gladskyi M,Panasovskyi K,et al.Multiaxial fatigue of titanium including step loading and load path alteration and sequence effects[J].International Journal of Fatigue,2010,32(11):1862-1874.
[2]Liu Xiaofeng,Bo Lin,Luo Hongling.Dynamical measurement system for wind turbine fatigue load[J].Renewable Energy,2016,86:909-921.
[3]石可重,赵晓路,徐建中.大型风电机组叶片疲劳试验研究[J].太阳能学报,2011,32(8):1264-1267.[3]Shi Kezhong,Zhao Xiaolu,Xu Jianzhong.Research on fatigue test of large horizontal axis wind turbine blade[J].Acta Energiae Solaris Sinica,2011,32(8):1264-1267.
[4]张磊安,黄雪梅,姚锦恺.风电叶片两点疲劳加载系统振动耦合特性[J].振动与冲击,2015,34(17):83-87.[4]Zhang Leian,Huang Xuemei,Yao Jinkai.Vibration coupling features for a dual-point fatigue loading system of wind turbine blades[J].Journal of Vibration and Shock,2015,34(17):83-87.
[5]熊万里,闻邦椿,程志善.自同步振动及振动同步传动的机电耦合机理[J].振动工程学报,2000,13(3):325-331.[5]Xiong Wanli,Wen Bangchun,Duan Zhishan.Mechanism of electromechanical-coupling on selfsynchronous vibration and vibratory synchronization transmission[J].Journal of Vibration Engineering,2000,13(3):325-331.
[6]Zhao Chunyu,Wen Bangchun.Synchronization and general dynamic symmetry of a vibrating system with two exciters rotating in opposite directions[J].Chinese Physics B,2010,19(3):030301-030307.
[7]廖高华,乌建中,来鑫.风电叶片双锤激振加载振动耦合特性及试验研究[J].中南大学学报:自然科学版,2016,47(11):3692-3699.[7]Liao Gaohua,Wu Jianzhong,Lai Xin.Experiment and coupling characteristics of double hammer excitation fatigue loading system[J].Journal of Central South University:Science and Technology,2016,47(11):3692-3699.
[8]White D.New methods for dual-axis testing of large blades[D].Colorado:University of Colorado,2004.
[9]金丹,陈旭.多轴随机载荷下的疲劳寿命估算方法[J].力学进展,2006,36(1):65-74.[9]Jin Dan,Chen Xu.Fatigue life evaluation under multiaxial random loadings[J].Advances in mechanics,2006,36(1):65-74.
[10]Shamsaei N,Gladskyi M,Panasovskyi K,et al.Multiaxial fatigue of titanium including step loading and load path alteration and sequence effects[J].International Journal of Fatigue,2010,32(11):1862-1874.