scholarly journals Global tip-tilt and high order aberrations correctionwith plenoptic wavefront sensor in closed-loop AOsystems

2021 ◽  
Author(s):  
Zhentao Zhang ◽  
Timothy Morris ◽  
Nazim Bharmal ◽  
Yonghui Liang
Keyword(s):  
Closed Loop ◽  
High Order ◽  
Wavefront Sensor ◽  
High Order Aberrations

The Changes of Corneal High-Order Aberrations and Anterior Chamber Parameters after Trabeculectomy Using Pentacam®

2014 ◽  
Vol 55 (5) ◽  
pp. 662 ◽  
Author(s):  
Byoung Seon Kim ◽  
Byung Jae Kim ◽  
In Young Chung ◽  
Seong Wook Seo ◽  
Ji Myong Yoo ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
High Order ◽  
High Order Aberrations

scholarly journals The Adaptive Neural Control for a Class of High-Order Uncertain Stochastic Nonlinear Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Xiaoyan Qin
Keyword(s):  
Nonlinear Systems ◽  
Neural Control ◽  
Closed Loop ◽  
Control Method ◽  
High Order ◽  
Stochastic Nonlinear Systems ◽  
Closed Loop System ◽  
Adaptive Neural Control ◽  
Control Scheme ◽  
Approximation Capability

This paper studies the problem of the adaptive neural control for a class of high-order uncertain stochastic nonlinear systems. By using some techniques such as the backstepping recursive technique, Young’s inequality, and approximation capability, a novel adaptive neural control scheme is constructed. The proposed control method can guarantee that the signals of the closed-loop system are bounded in probability, and only one parameter needs to be updated online. One example is given to show the effectiveness of the proposed control method.

scholarly journals Role of high-order aberrations in senescent changes in spatial vision

2009 ◽  
Vol 9 (2) ◽  
pp. 24-24 ◽  
Author(s):  
S. L. Elliott ◽  
S. S. Choi ◽  
N. Doble ◽  
J. L. Hardy ◽  
J. W. Evans ◽  
...  
Keyword(s):  
Spatial Vision ◽  
High Order ◽  
High Order Aberrations

Aberration Polynomials and High-Order Aberrations

2017 ◽  
pp. 159-197
Author(s):  
Daniel Malacara-Hernández ◽  
Zacarías Malacara-Hernández
Keyword(s):  
High Order ◽  
High Order Aberrations

scholarly journals Changes of corneal high-order aberrations after femtosecond laser-assisted in situ keratomileusis

Medicine ◽  
2018 ◽  
Vol 97 (18) ◽  
pp. e0618 ◽  
Author(s):  
Jing Wang ◽  
Yanlin Ren ◽  
Kun Liang ◽  
Zhengxuan Jiang ◽  
Liming Tao
Keyword(s):  
Femtosecond Laser ◽  
High Order ◽  
High Order Aberrations

Global fixed-time stabilization for a class of uncertain high-order nonlinear systems with dead-zone input nonlinearity

2018 ◽  
Vol 41 (7) ◽  
pp. 1888-1895
Author(s):  
Fangzheng Gao ◽  
Yanling Shang ◽  
Yuqiang Wu ◽  
Yanhong Liu
Keyword(s):  
Nonlinear Systems ◽  
State Feedback ◽  
Closed Loop ◽  
Dead Zone ◽  
Fixed Time ◽  
High Order ◽  
Closed Loop System ◽  
Sign Function ◽  
Input Nonlinearity ◽  
Power Integrator

This paper considers the problem of global fixed-time stabilization for a class of uncertain high-order nonlinear systems. One distinct characteristic of this work is that the system under consideration possesses the dead-zone input nonlinearity. By delicately combining the sign function with a power integrator technique, a state feedback controller is designed such that the states of the resulting closed-loop system converge to the origin within a fixed time. A simulation example is provided to illustrate the effectiveness of the proposed approach.

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