scholarly journals Dampening controllers via a Riccati equation approach

1998 ◽  
Vol 43 (9) ◽  
pp. 1280-1284 ◽  
Author(s):  
J.J. Hench ◽  
C. He ◽  
V. Kucera ◽  
V. Mehrmann
Keyword(s):  
Riccati Equation ◽  
Equation Approach

Optical solitons for Lakshmanan–Porsezian–Daniel model by Riccati equation approach

Optik ◽  
2019 ◽  
Vol 182 ◽  
pp. 922-929 ◽  
Author(s):  
A.A. AlQarni ◽  
A. Ebaid ◽  
A.A. Alshaery ◽  
H.O. Bakodah ◽  
Anjan Biswas ◽  
...  
Keyword(s):  
Riccati Equation ◽  
Optical Solitons ◽  
Equation Approach

Vibration suppression and attitude control for the formation flight of flexible satellites by optimally tuned on-off state-dependent Riccati equation approach

2020 ◽  
Vol 42 (15) ◽  
pp. 2984-3001
Author(s):  
Hossein Rouzegar ◽  
Alireza Khosravi ◽  
Pouria Sarhadi
Keyword(s):  
Riccati Equation ◽  
Attitude Control ◽  
Vibration Suppression ◽  
Pso Algorithm ◽  
Formation Flight ◽  
Equation Approach ◽  
Coordination Control ◽  
Suggested Approach ◽  
State Dependent ◽  
Highly Nonlinear

In this paper, vibration suppression and attitude control for the formation flight of flexible satellites using optimally tuned on-off SDRE (state-dependent Riccati equation) approach is discussed. A formation consisting of flexible satellites has highly nonlinear dynamics and the corresponding satellites are subject to vibrations as well as uncertainties due to the practical conditions. Vibrations that are mainly caused by flexible modes of the satellites disorganize the coordination and hinder the formation stability as well as decreasing its performance and lifetime. Hence, flexibility should be considered in formation model and the coordination control needs to address such challenges. Owing to capabilities of SDRE approach for nonlinear systems, it is used as the coordination control. Satellites are assumed to be equipped with thrusters as their actuators which requires the control to be applied as on-off pulses. To this end, an algorithm is suggested to efficiently convert SDRE control into on-off pulses. For optimal tuning of the controller, the particle swarm optimization (PSO) algorithm is employed. Stability of the system has also been analyzed via a Lyapunov-based approach utilizing the region of attraction concept. The proposed on-off SDRE approach has shown to effectively suppress the vibrations in the presence of uncertainties leading to the accurate coordination of the whole formation while consuming less energy. Simulation results show the capability, efficiency, robustness and stability of the suggested approach.

A Simple Criterion for Robust Stabilization Design of Interval Time-Delay Systems

2014 ◽  
Vol 989-994 ◽  
pp. 3340-3343 ◽  
Author(s):  
Chien Hua Lee ◽  
Ping Sung Liao
Keyword(s):  
Time Delay ◽  
Riccati Equation ◽  
Upper Bound ◽  
Robust Stabilization ◽  
Delay Systems ◽  
Equation Approach ◽  
Time Delay Systems ◽  
Stabilization Problem ◽  
Simple Criterion ◽  
Interval Time

This paper addresses the robust stabilization problem of interval time-delay systems. By applying an upper bound to the Riccati equation approach, a stabilizability condition and a controller are proposed. It is easy to test the presented condition and to implement the controller.

Optical soliton perturbation with Fokas-Lenells model by Riccati equation approach

Optik ◽  
2018 ◽  
Vol 172 ◽  
pp. 741-745 ◽  
Author(s):  
A.F. Aljohani ◽  
E.R. El-Zahar ◽  
A. Ebaid ◽  
Mehmet Ekici ◽  
Anjan Biswas
Keyword(s):  
Riccati Equation ◽  
Optical Soliton ◽  
Equation Approach ◽  
Soliton Perturbation
Sign in / Sign up

Export Citation Format

Share Document