摘要
为了抑制输电塔-线体系的风致动力响应,基于多目标优化理论设计了鲁棒H2/H∞控制器.在体系平面内、外振动状态方程的摄动矩阵中引入不确定性,运用MATLAB中的线性矩阵不等式工具箱并结合改进的限幅最优(MCO)控制器提出了H2/H∞_M CO半主动控制策略.以某特高压猫头型输电塔-线体系为算例,分别计算了其在无控制、被动控制、恒定增量(CI)半主动控制及H2/H∞_M CO半主动控制下的风致响应.结果表明:H2/H∞_M CO策略对塔体位移、塔体加速度和塔底内力的抑制效果比无控制、被动控制及CI控制的抑制效果都要显著.
The robust H2/ H∞controller designed by multi-objective optimization theory was applied to suppress the wind-induced dynamic response( WIDR) of the transmission tower-line system( TTLS). The uncertain parameters( mass,damping and stiffness) were introduced into perturbed matrixes in vibration( both in-plane and out-plane of the TTLS) state equations,and the H2/ H∞_MCO semi-active control strategy was proposed by the linear matrix inequalities( LMI)tool box in the MATLAB and modified clipped-optimal( MCO) control algorithm. An cat 's head-type TTLS with ultra high voltage was used as an example,and the WIDRs of the example under non-control( NC),passive control( PC),constant increment( CI) semi-active control and H2/ H∞_MCO semi-active control were computed,respectively. The consequences indicate that the vibration suppression effects of the H2/ H∞MCO on tower displacements,tower accelerations and tower bottom internal forces( shear forces and bending moments) are obviously superior to those of NC,PC and CI.
出处
《东北大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2016年第2期279-284,共6页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51078077)
"十二五"国家科技支撑计划项目(2012BAJ14B00)
关键词
输电塔
阻尼器
动力响应
振动控制
鲁棒性
transmission tower
damper
dynamic response
vibration control
robustness