Linear-based gain-determining method for adaptive backstepping controller

2021 ◽  
Author(s):  
Zhengqi Wang ◽  
Xiaoping Liu ◽  
Wilson Wang
Keyword(s):  
Adaptive Backstepping ◽  
Backstepping Controller ◽  
Adaptive Backstepping Controller

scholarly journals Composite adaptive backstepping controller design and the energy calculation for active suspension system

2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110105
Author(s):  
Xiaoyu Su ◽  
Bin Lin ◽  
Shuai Liu
Keyword(s):  
Adaptive Algorithm ◽  
Power Calculation ◽  
Calculation Formula ◽  
Adaptive Backstepping ◽  
Adaptive Law ◽  
Car Suspension ◽  
Backstepping Controller ◽  
Suspension Model ◽  
Storage Characteristics ◽  
Adaptive Backstepping Controller

The half-car suspension has the coupling of pitch angle and front and rear suspension. Especially when the suspension model has a series of uncertainties, the traditional linear control method is difficult to be applied to the half-car suspension model. At present, there is no systematic method to solve the suspension power. According to the energy storage characteristics of the elastic components of the suspension, the power calculation formula is proposed in this paper. This paper proposes a composite adaptive backstepping control scheme for the half-car active suspension systems. In this method, the correlation information between the output error and the parameter estimation error is used to construct the adaptive law. According to the energy storage characteristics of the elastic components of the suspension, the power calculation formula is introduced. The compound adaptive law and the ordinary adaptive law have good disturbance suppression, both of which can solve the pitching angle problem of the semi-car suspension, but the algorithm of the compound adaptive law is superior in effect. In terms of vehicle comfort, the algorithm of the general adaptive law can achieve stability quickly, but compared with the composite adaptive law, its peak value and jitter are higher, while the algorithm of the composite adaptive law is relatively gentle and has better adaptability to human body. In terms of vehicle handling, both control algorithms can maintain driving safety under road excitation, and the compound adaptive algorithm appears to have more advantages. Compared with the traditional adaptive algorithm, the power consumption of the composite adaptive algorithm is relatively lower than that of the former in the whole process. The simulation results show that the ride comfort, operating stability and safety of the vehicle can be effectively improved by the composite adaptive backstepping controller, and the composite adaptive algorithm is more energy-saving than the conventional adaptive algorithm based on projection operator.

Nonlinear Adaptive Backstepping Controller Design for Three-Phase Grid-Connected Solar Photovoltaic Systems

2017 ◽  
Vol 45 (20) ◽  
pp. 2275-2292 ◽  
Author(s):  
Tushar Kanti Roy ◽  
Md Apel Mahmud ◽  
Amanullah Maung Than Oo ◽  
Ramesh Bansal ◽  
Md Enamul Haque
Keyword(s):  
Controller Design ◽  
Photovoltaic Systems ◽  
Solar Photovoltaic ◽  
Adaptive Backstepping ◽  
Three Phase ◽  
Backstepping Controller ◽  
Adaptive Backstepping Controller

Nonlinear integrated guidance and control based on adaptive backstepping scheme

2017 ◽  
Vol 89 (3) ◽  
pp. 415-424 ◽  
Author(s):  
Seyed Hamed Seyedipour ◽  
Mohsen Fathi Jegarkandi ◽  
Saeed Shamaghdari
Keyword(s):  
Nonlinear System ◽  
Nonlinear Model ◽  
Adaptive Backstepping ◽  
Content Type ◽  
Guidance And Control ◽  
Air Vehicle ◽  
Backstepping Controller ◽  
Integrated Guidance And Control ◽  
And Control ◽  
Adaptive Backstepping Controller

Purpose The purpose of this paper is to design an adaptive nonlinear controller for a nonlinear system of integrated guidance and control. Design/methodology/approach A nonlinear integrated guidance and control approach is applied to a homing, tail-controlled air vehicle. Adaptive backstepping controller technique is used to deal with the problem, and the Lyapanov theory is used in the stability analysis of the nonlinear system. A nonlinear model of normal force coefficient is obtained from an existing nonlinear model of lift coefficient which was validated by open loop response. The simulation was performed in the pitch plane to prove the benefits of the proposed scheme; however, it can be readily extended to all the three axes. Findings Monte Carlo simulations indicate that using nonlinear adaptive backstepping formulation meaningfully improves the performance of the system, while it ensures stability of a nonlinear system. Practical implications The proposed method could be used to obtain better performance of hit to kill accuracy without the expense of control effort. Originality/value A nonlinear adaptive backstepping controller for nonlinear aerodynamic air vehicle is designed and guaranteed to be stable which is a novel-based approach to the integrated guidance and control. This method makes noticeable performance improvement, and it can be used with hit to kill accuracy.

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