Abstract: This paper presents an extension of the L1 adaptive controller to a class of nonlinear systems where the control effectiveness is timevarying and unknown, but with a known sign. Moreover, this class of nonlinear systems ...

Abstract: This paper presents an L1 adaptive controller for pressure control using an engine bleed valve in an aircraft air management system (AMS). The air management system is composed of two pressure-regulating bleed valves, a ...

Abstract: This paper presents an approach to use the L1 adaptive controller for a class of uncertain systems in the presence of unknown Preisachtype hysteresis in input, unknown timevarying parameters, and unknown timevarying ...