Adaptive Fault-Tolerant Control for Rigid Spacecraft Attitude System Using Fractional Order Sliding Mode

2019 ◽  
Author(s):  
Xiaobo Zhang ◽  
Zhifeng Gao ◽  
Moshu Qian ◽  
Lang Bai
Keyword(s):  
Fractional Order ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Fault Tolerant Control ◽  
Spacecraft Attitude ◽  
Rigid Spacecraft

Neural Adaptive Fault Tolerant Control of Nonlinear Fractional Order Systems Via Terminal Sliding Mode Approach

2019 ◽  
Vol 14 (3) ◽  
Author(s):  
Bijan Hashtarkhani ◽  
Mohammad Javad Khosrowjerdi
Keyword(s):  
Fractional Order ◽  
Finite Time ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Fault Tolerant Control ◽  
State Feedback Control ◽  
Time Stability ◽  
Terminal Sliding Mode ◽  
Finite Time Stability ◽  
Output Tracking

This article proposes an adaptive neural output tracking control scheme for a class of nonlinear fractional order (FO) systems in the presence of unknown actuator faults. By means of backstepping terminal sliding mode (SM) control technique, an adaptive fractional state-feedback control law is extracted to achieve finite time stability along with output tracking for an uncertain faulty FO system. The unknown nonlinear terms are approximated by radial-basis function neural network (RBFNN) with unknown approximation error upper bound. Using convergence in finite time and fractional Lyapunov stability theorems, the finite time stability and tracking achievement are proved. Finally, the proposed fault tolerant control (FTC) approach is validated with numerical simulations on two fractional models including fractional Genesio–Tesi and fractional Duffing's oscillator systems.

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