According to the Rodrigues parameter and the internal model principle,an adaptive state feedback control law is proposed for a rigid spacecraft with inertia uncertainty and exotic disturbances generated by an unknown ...According to the Rodrigues parameter and the internal model principle,an adaptive state feedback control law is proposed for a rigid spacecraft with inertia uncertainty and exotic disturbances generated by an unknown nonlinear exosystem.The uncertainty of parameters is treated by an adaptive control law.And a new internal model is proposed to estimate the exotic disturbances.By using the Lyapunov analysis method,the control law is designed to ensure that the system's state variables asymptotically converge to stable,and the disturbances can be completely rejected.Finally,numerical simulations are included to demonstrate the performance of the presented controller.展开更多
Two nonlinear control techniques are proposed for an atomic force microscopesystem. Initially, a learning-based control algorithm is developed for the microcantilever-samplesystem that achieves asymptotic cantilever t...Two nonlinear control techniques are proposed for an atomic force microscopesystem. Initially, a learning-based control algorithm is developed for the microcantilever-samplesystem that achieves asymptotic cantilever tip tracking for periodic trajectories. Specifically, thecontrol approach utilizes a learning-based feedforward term to compensate for periodic dynamics andhigh-gain terms to account for non-periodic dynamics. An adaptive control algorithm is thendeveloped to achieve asymptotic cantilever tip tracking for bounded tip trajectories despiteuncertainty throughout the system parameters. Simulation results are provided to illustrate theefficacy and performance of the control strategies.展开更多
针对中密度纤维板（Medium Density Fiberboard,MDF）连续热压机电液伺服系统,提出一种滑模动态面跟踪控制策略。首先,采用动态面控制（Dynamic Surface Control,DSC）的方法,有效避免了反步法（Backstepping）设计控制器时引起的系统...针对中密度纤维板（Medium Density Fiberboard,MDF）连续热压机电液伺服系统,提出一种滑模动态面跟踪控制策略。首先,采用动态面控制（Dynamic Surface Control,DSC）的方法,有效避免了反步法（Backstepping）设计控制器时引起的系统微分项膨胀问题。其次,考虑到系统存在的内部参数摄动和外负载力扰动,在第3个子系统中引入滑模面,并对切换函数进行了连续化处理。最后,基于Lyapunov稳定性分析方法,给出了系统稳定性的证明。仿真实验表明,提出的策略可以保证MDF获得良好的板厚精度。展开更多
基金National Natural Science Foundation of China(No.61663030,No.61663032)Natural Science Foundation of Jiangxi Province,China(No.20142BAB207021)+4 种基金the Innovation Fund Designated for Graduate Students of Jiangxi Province(YC2016-S350)the Foundation of Jiangxi Educational Committee,China(No.GJJ150753)the Open Fund of Key Laboratory of Image Processing and Pattern Recognition of Jiangxi Province,China(Nanchang Hangkong University)(No.TX201404003)Key Laboratory of Nondestructive Testing(Nanchang Hangkong University),Ministry of Education,China(No.ZD29529005)The Twelfth "Sanxiao" College Students Extracurricular Innovation and Entrepreneurship Practice and Training Project of Nanchang Hangkong University,China(No.2017ZD021)
文摘According to the Rodrigues parameter and the internal model principle,an adaptive state feedback control law is proposed for a rigid spacecraft with inertia uncertainty and exotic disturbances generated by an unknown nonlinear exosystem.The uncertainty of parameters is treated by an adaptive control law.And a new internal model is proposed to estimate the exotic disturbances.By using the Lyapunov analysis method,the control law is designed to ensure that the system's state variables asymptotically converge to stable,and the disturbances can be completely rejected.Finally,numerical simulations are included to demonstrate the performance of the presented controller.
文摘Two nonlinear control techniques are proposed for an atomic force microscopesystem. Initially, a learning-based control algorithm is developed for the microcantilever-samplesystem that achieves asymptotic cantilever tip tracking for periodic trajectories. Specifically, thecontrol approach utilizes a learning-based feedforward term to compensate for periodic dynamics andhigh-gain terms to account for non-periodic dynamics. An adaptive control algorithm is thendeveloped to achieve asymptotic cantilever tip tracking for bounded tip trajectories despiteuncertainty throughout the system parameters. Simulation results are provided to illustrate theefficacy and performance of the control strategies.
文摘针对中密度纤维板（Medium Density Fiberboard,MDF）连续热压机电液伺服系统,提出一种滑模动态面跟踪控制策略。首先,采用动态面控制（Dynamic Surface Control,DSC）的方法,有效避免了反步法（Backstepping）设计控制器时引起的系统微分项膨胀问题。其次,考虑到系统存在的内部参数摄动和外负载力扰动,在第3个子系统中引入滑模面,并对切换函数进行了连续化处理。最后,基于Lyapunov稳定性分析方法,给出了系统稳定性的证明。仿真实验表明,提出的策略可以保证MDF获得良好的板厚精度。
