Robust adaptive control for MDF hot press hydraulic system based on fuzzy disturbance observer

2016 ◽  
Vol 26 (2) ◽  
pp. 79 ◽  
Author(s):  
Liangkuan Zhu ◽  
Yaqiu Liu ◽  
Xiaodong Shao ◽  
Kun Wang
Keyword(s):  
Adaptive Control ◽  
Hydraulic System ◽  
Disturbance Observer ◽  
Robust Adaptive Control ◽  
Hot Press ◽  
Robust Adaptive ◽  
Fuzzy Disturbance Observer

scholarly journals Robust Adaptive Control of Hydraulic System With Input Saturation and Valve Dead-Zone

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 53521-53532 ◽  
Author(s):  
Weiwei Gu ◽  
Jianyong Yao ◽  
Zhikai Yao ◽  
Jingzhong Zheng
Keyword(s):  
Adaptive Control ◽  
Hydraulic System ◽  
Dead Zone ◽  
Input Saturation ◽  
Robust Adaptive Control ◽  
Robust Adaptive

Part 1: robust adaptive control of quadrotor with disturbance observer

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Nigar Ahmed ◽  
Abid Raza ◽  
Rameez Khan
Keyword(s):  
Adaptive Control ◽  
Disturbance Observer ◽  
Control Method ◽  
Sliding Mode ◽  
External Disturbance ◽  
Robust Adaptive Control ◽  
External Disturbances ◽  
Content Type ◽  
Control Objective ◽  
Robust Adaptive

Purpose The aim of this paper is to design a nonlinear disturbance observer-based control (DOBC) method obtained by patching a control method developed using a robust adaptive technique and a DO. Design/methodology/approach For designing a DOBC, initially a class of nonlinear system is considered with an external disturbance. First, a DO is designed to estimate the external disturbances. This estimate is combined with the controller to reject the disturbances and obtain the desired control objective. For designing a controller, the robust sliding mode control theory is used. Furthermore, instead of using a constant switching gain, an adaptive gain tuning criterion is designed using Lyapunov candidate function. To investigate the stability and effectiveness of the developed DOBC, stability analysis and simulation study are presented. Findings The major findings of this paper include the criteria of designing the robust adaptive control parameters and investigating the disturbance rejection when robust adaptive control based DOBC is developed. Practical implications In practice, the flight of quadrotor is affected by different kind of external disturbances, thus leading to the change in dynamics. Hence, it is necessary to design DOBCs based on robust adaptive controllers such that the quadrotor model adapts to the change in dynamics, as well as nullify the effect of disturbances. Originality/value Designing DOBCs based on robust control method is a common practice; however, the robust adaptive control method is rarely developed. This paper contributes in the domain of DOBC based on robust adaptive control methods such that the behavior of controller varies with the change in dynamics occurring due to external disturbances.

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