Adaptive fault tolerant control of dissimilar redundant actuation system of civil aircraft based on integral sliding mode control strategy

Abstract

In modern aircraft, the dissimilar redundant actuation system is used to resolve the actuator failure issues due to the common cause, thus increasing the system reliability. This paper proposes an adaptive integral sliding mode fault tolerant control strategy to deal with actuator fault/failure in the dissimilar redundant actuation system of civil aircraft. To cope with the unknown actuator faults, the adaptive integral sliding mode controller is designed where the modulation gain is made adaptive to the fault. To deal with the complete failure of certain actuator, the integral sliding mode control is integrated with control allocation scheme and distribute the control input signals to the redundant actuators. The performance of the proposed scheme is tested on the nonlinear model of dissimilar redundant actuation system, where the effect of external airload is accounted during simulations. The effectiveness of the proposed scheme is validated by comparing the simulations with the existing literature.

Motion synchronization for the SHA/EMA hybrid actuation system by using an optimization algorithm

“…Step 5: Update the position and velocity of particles by Equation (29). Apply the upper and lower bounds with the help of Equation (23).…”

“…[17][18][19] tried to force (compel) the HA/EHA system to follow trajectory motion state's signals (position, velocity and acceleration signals) for motion synchronization. Various control techniques, such as integral sliding mode control, LPV-and LPV-based integral sliding mode control, are used to solve the problem of the force fighting with precise motion tracking for the HA/EHA system [20][21][22][23]. An integral action controller that is designed uses position and force signals to reduce force fighting.…”

Robust synchronization motion tracking control for a two-slider system restrained by a flexible beam

“…Finally, an intelligent matching algorithm is proposed based on the dominant closed-loop poles to obtain the performance degraded fault-tolerant capability. Ijaz et al [16] present an adaptive fault tolerant tracking controller for a DRAS of civil aircraft. In [16] the same force coupling models as in [7] and [15] are used.…”

“…Ijaz et al [16] present an adaptive fault tolerant tracking controller for a DRAS of civil aircraft. In [16] the same force coupling models as in [7] and [15] are used. In order to handle the actuator faults, an adaptive integral sliding mode controller is designed, whose gains can be made adaptive to the fault.…”

Fault tolerant control using integral sliding modes with control allocation along the null-space

“…The theory was improved by Hamayun (2013) and Hamayun et al (2010) using integral sliding mode fault tolerant control. Ijaz et al (2019) proposed an adaptive integral sliding mode FTC with CA scheme to ensure the faster and reliable actuation with the occurrence of faults. Wang et al (2016) proposed a finite time attitude track control structure, which uses an integral sliding mode controller to ensure the system states can be stabilized in finite time.…”