Integral Sliding Mode Fault‐Tolerant Control for Spacecraft With Uncertainties and Saturation

Abstract

An integral sliding mode fault‐tolerant control method is proposed to deal with faults with matched uncertainties, unmatched uncertainties, and input saturation. Integral sliding mode, control allocation, and parameter identification are included in this method. The Lyapunov stability conditions of the integral sliding mode control for uncertainties and input saturation, respectively, are obtained, which denote the robustness extent of the controller. The direct method for control allocation is improved by adding a judgement before calculating for each facet. Finally, the fault‐tolerant scheme is applied to a six‐wheel spacecraft and simulations are given to show its effectiveness.

Experimental Investigation of Passive Fault Tolerant Control for Induction Machine Using Sliding Mode Approach

“…The IM subject to trajectory tracking is tested with T L = 7N.m load disturbance. The ISMC and the SOSMO parameters used in (11), (16) and (34) are selected as presented in Table II.…”

“…Nonetheless, robustness during the reaching mode is not guaranteed. The SMC with an integral surface (ISMC), initially proposed by , eliminates the reaching mode associated with classical SMC and ensure a sliding mode throughout the entire closed‐loop response of the system . However, the ISMC of IM needs the rotor flux measurement and unfortunately, the rotor flux cannot be measured directly.…”

Fault-tolerant control for a class of n-order systems based on fast terminal sliding mode and extended state observer

“…1 Under such background and requirements, fault-tolerant control has developed rapidly in recent years and has become one of the research hotspots in control discipline. [2][3][4] In general, fault-tolerant control is divided into two categories: passive fault-tolerant control (PFTC) and active fault-tolerant control (AFTC). PFTC is developed from robust control, which does not require fault detection and diagnosis (FDD) module.…”

Fault tolerant control for a class of nonlinear system with actuator faults

“…In the FTC scheme, besides the approaches introduced above, one effective way to guarantee the control performance of the system with fault, is to apply the estimator to obtain the information of system state/fault. The common used estimator/observer includes sliding mode observers [25][26][27], unknown input observers [28], adaptive observers [29,30], extended state observer [31,32] and Kalman filters [33][34][35]. In this work, based on the intermediate estimator proposed in [36], we develop an improved fault estimator, which is used to estimate the states and the actuator faults simultaneously.…”