References of "Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering"
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See detailImproved Observer-Based Robust Adaptive Control for a Class of Nonlinear Systems with Unknown Deadzone
Jasim, Ibrahim UL

in Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering (2013), 227(2), 184-197

This article presents an improved observer-based robust adaptive control strategy for a class of nonlinear systems that have two features: (1) the coupling of unmeasured states and unknown parameters ... [more ▼]

This article presents an improved observer-based robust adaptive control strategy for a class of nonlinear systems that have two features: (1) the coupling of unmeasured states and unknown parameters exist at the measured states dynamics and (2) unknown deadzone exists at the system actuation. At first, the bounds of the deadzone parameters are assumed to be known and a suitable control strategy is derived. This strategy involves the derivation of a control action, observer of the unmeasured states, and estimators of the unknown parameters such that global stable system performance is guaranteed. Then, another control strategy is proposed when the bounds of the deadzone parameters are unavailable. The second control algorithm comprises the derivation of suitable control action, observer of the unmeasured states, and estimators of the unknown parameters such that global stable system performance is assured and the anonymity of the bounds of the deadzone parameters is accommodated. Simulations are performed when using both control strategies for a nonlinear system that falls in the category of systems addressed in this article. The system is a single-link mechanical joint that suffers from friction torque, modeled by LuGre friction model, with unknown deadzone exists at its actuation. The simulation results show the high performance of the suggested control approaches. [less ▲]

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See detailRobust adaptive control of spacecraft attitude systems with unknown dead zones of unknown bounds
Jasim, Ibrahim UL; Jasim, Najah

in Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering (2012), 226(7), 947-955

This paper addresses the problem of attitude control of a spacecraft when unknown dead zones of unknown bounds exist at the actuators. A robust adaptive controller with parameter update laws are designed ... [more ▼]

This paper addresses the problem of attitude control of a spacecraft when unknown dead zones of unknown bounds exist at the actuators. A robust adaptive controller with parameter update laws are designed for the spacecraft’s attitude and an asymptotically stable tracking performance is mathematically proven based on the proposed design. Numerical simulation results along with the theoretical proof show that the proposed control scheme can successfully stabilize the attitude of the spacecraft with the unknown actuator dead zones. [less ▲]

Detailed reference viewed: 96 (3 UL)