To eliminate the node traction coupling during wind turbine blade full-scale static testing,a model free adaptive control algorithm is presented based on fuzzy control performance function compensation. Based on the u...To eliminate the node traction coupling during wind turbine blade full-scale static testing,a model free adaptive control algorithm is presented based on fuzzy control performance function compensation. Based on the universal model theory,the fuzzy model free adaptive control( FMFAC) algorithm is designed by configuring the spot static testing experiences as compensation function F( ·). Then the algorithm implementation process is provided and its quick convergence is proved. Using software to establish static load coupling model of multi-nodes,simulate and verify the validity of FMFAC algorithm,which is applied to wind turbines blade full-scale static testing. The results show that the adaptive decoupling ability of FMFAC is better. The traction of four load points can stay steady and change coordinately. Process error is not over ± 6 k N. The error rate is lower than 1% in special phase.This algorithm effectively eliminates the traction coupling of the static testing process,and makes wind turbine blade testing steadily.展开更多
To address the complex structures,large out-of-tolerance issues,and inconsistent quality of double-walled turbine blades,a mapping relationship between the structure and deformation was established based on a structur...To address the complex structures,large out-of-tolerance issues,and inconsistent quality of double-walled turbine blades,a mapping relationship between the structure and deformation was established based on a structural correlation study.Numerical simulations and pouring experiments were carried out based on the designed double-walled model,and a reliable displacement field model of the double-walled blade was established.A decoupling method for the displacement field of the double-walled blade castings was proposed,which decoupled the displacement field into bending,torsion,and expansion/shrinkage deformation vectors.Based on the displacement field analysis of the theoretical and physical models,an expansion/shrinkage model of double-walled blade structure castings was established.Furthermore,an experiment to determine the mapping relationship between double-walled construction and deformation was designed,which included the characteristic distribution distance and designed angle as structural parameters.The functional relationship between the deformation and the structural parameters was established based on a nonlinear regression method.展开更多
针对风机叶片静力加载试验时各个加载点之间存在加载力耦合,加载力抖动影响精度甚至损坏叶片,研究了多点风电叶片静力加载模型及解耦控制。分析多点加载下叶片变形耦合,利用悬臂梁模型推导了多点加载下叶片变形耦合矩阵关系式,并结合变...针对风机叶片静力加载试验时各个加载点之间存在加载力耦合,加载力抖动影响精度甚至损坏叶片,研究了多点风电叶片静力加载模型及解耦控制。分析多点加载下叶片变形耦合,利用悬臂梁模型推导了多点加载下叶片变形耦合矩阵关系式,并结合变频调速控制液压系统,建立了两点耦合加载系统的仿真模型,设计了解耦控制器及自适应模糊PID控制算法,减少各个节点的牵引力耦合,实现叶片多节点全尺寸静力加载试验。仿真表明解耦控制器很好地解决多点耦合,加载曲线振荡现象明显减少,节点最大误差为2.3%。试验进一步证明:叶片加载过程中加载点牵引力能保持平稳、协调变化,加载保持阶段的偏差维持在±0.1 k N,降低了加载过程中牵引力耦合,获得较好的控制效果,满足风机叶片静力加载试验要求。展开更多
基金National Natural Science Foundation of China(No.51567018)
文摘To eliminate the node traction coupling during wind turbine blade full-scale static testing,a model free adaptive control algorithm is presented based on fuzzy control performance function compensation. Based on the universal model theory,the fuzzy model free adaptive control( FMFAC) algorithm is designed by configuring the spot static testing experiences as compensation function F( ·). Then the algorithm implementation process is provided and its quick convergence is proved. Using software to establish static load coupling model of multi-nodes,simulate and verify the validity of FMFAC algorithm,which is applied to wind turbines blade full-scale static testing. The results show that the adaptive decoupling ability of FMFAC is better. The traction of four load points can stay steady and change coordinately. Process error is not over ± 6 k N. The error rate is lower than 1% in special phase.This algorithm effectively eliminates the traction coupling of the static testing process,and makes wind turbine blade testing steadily.
基金This research was funded by the National Natural Science Foundation of China(Grant Number 51705440)the Natural Science Foundation of Fujian Province,China(Grant Number 2019J01044)+1 种基金the Aeronautical Science Foundation of China(Grant Number 20170368001)the National Science and Technology Major Project of China(Nos.J2019-III-0008 and J2019-VII-0013-0153)。
文摘To address the complex structures,large out-of-tolerance issues,and inconsistent quality of double-walled turbine blades,a mapping relationship between the structure and deformation was established based on a structural correlation study.Numerical simulations and pouring experiments were carried out based on the designed double-walled model,and a reliable displacement field model of the double-walled blade was established.A decoupling method for the displacement field of the double-walled blade castings was proposed,which decoupled the displacement field into bending,torsion,and expansion/shrinkage deformation vectors.Based on the displacement field analysis of the theoretical and physical models,an expansion/shrinkage model of double-walled blade structure castings was established.Furthermore,an experiment to determine the mapping relationship between double-walled construction and deformation was designed,which included the characteristic distribution distance and designed angle as structural parameters.The functional relationship between the deformation and the structural parameters was established based on a nonlinear regression method.
文摘针对风机叶片静力加载试验时各个加载点之间存在加载力耦合,加载力抖动影响精度甚至损坏叶片,研究了多点风电叶片静力加载模型及解耦控制。分析多点加载下叶片变形耦合,利用悬臂梁模型推导了多点加载下叶片变形耦合矩阵关系式,并结合变频调速控制液压系统,建立了两点耦合加载系统的仿真模型,设计了解耦控制器及自适应模糊PID控制算法,减少各个节点的牵引力耦合,实现叶片多节点全尺寸静力加载试验。仿真表明解耦控制器很好地解决多点耦合,加载曲线振荡现象明显减少,节点最大误差为2.3%。试验进一步证明:叶片加载过程中加载点牵引力能保持平稳、协调变化,加载保持阶段的偏差维持在±0.1 k N,降低了加载过程中牵引力耦合,获得较好的控制效果,满足风机叶片静力加载试验要求。
