An improved nonsingular fast terminal sliding mode manifold based on scaled state error is proposed in this paper.It can significantly accelerate the convergence rate of the state error which is initially far from the...An improved nonsingular fast terminal sliding mode manifold based on scaled state error is proposed in this paper.It can significantly accelerate the convergence rate of the state error which is initially far from the origin and achieve the fixed-time convergence.In addition,conventional double power term based reaching law is improved to ensure the convergence of sliding state in the presence of disturbances.The proposed approach is applied to the hovering control of an unmanned underwater vehicle.The controller exhibits both fast convergence and strong robustness to model uncertainty and external disturbances.展开更多
针对永磁直驱风力发电系统实现最大风能捕获的问题,提出一种高阶非奇异终端滑模控制策略.根据永磁直驱风力发电系统的非线性模型,基于最佳转矩跟踪的最大功率点跟踪(maximum power point tracking)方法,将高阶非奇异终端滑模控制应用于...针对永磁直驱风力发电系统实现最大风能捕获的问题,提出一种高阶非奇异终端滑模控制策略.根据永磁直驱风力发电系统的非线性模型,基于最佳转矩跟踪的最大功率点跟踪(maximum power point tracking)方法,将高阶非奇异终端滑模控制应用于永磁同步发电机(permanent magnet synchronous generator)设计转矩控制器和电流控制器,实现永磁直驱风力发电系统的无风速传感器最大功率点的快速跟踪和稳定控制.仿真结果验证了所提出的控制方案的有效性.展开更多
文摘An improved nonsingular fast terminal sliding mode manifold based on scaled state error is proposed in this paper.It can significantly accelerate the convergence rate of the state error which is initially far from the origin and achieve the fixed-time convergence.In addition,conventional double power term based reaching law is improved to ensure the convergence of sliding state in the presence of disturbances.The proposed approach is applied to the hovering control of an unmanned underwater vehicle.The controller exhibits both fast convergence and strong robustness to model uncertainty and external disturbances.
文摘针对永磁直驱风力发电系统实现最大风能捕获的问题,提出一种高阶非奇异终端滑模控制策略.根据永磁直驱风力发电系统的非线性模型,基于最佳转矩跟踪的最大功率点跟踪(maximum power point tracking)方法,将高阶非奇异终端滑模控制应用于永磁同步发电机(permanent magnet synchronous generator)设计转矩控制器和电流控制器,实现永磁直驱风力发电系统的无风速传感器最大功率点的快速跟踪和稳定控制.仿真结果验证了所提出的控制方案的有效性.