This paper addresses the control problem of an electrohydraulic velocity servo-system (EHVSS). Two control schemes are proposed for the stabilization of the system. The first scheme is a dynamic sliding mode controller (SMC), and the second scheme is a linear quadratic regulator-like control law which is based on the state-dependent Riccati equation (SDRE) approach. When applying the SMC techni...

Abstract: The topic of single or multiple objective, optimal control or design has been a very attractive and desirable feature for many dynamic and static systems such as aerospace, electrical, mechanical and robotics, nuclear and aerospace engineering. In particular, in dynamic optimization of nonlinear systems, recent research interest has been the nonlinear, optimal, feedback control using ...

With the gradual increase of wind power penetration in system, impact farm on system stability is becoming more significant. This study designs stabilizer (PSS) based model reference adaptive control (MRAC) method and virtual impedance (VI) strategy. Then, active difference doubly fed induction generator (DFIG) selected as input signal MRAC-PSS-VI. The small-signal with DFIG enhanced by install...

Abstract The synthesis of suboptimal feedback laws for controlling nonlinear dynamics arising from semi-discretized PDEs is studied. An approach based on the State-dependent Riccati Equation (SDRE) presented 2 and ∞ control problems. Depending nonlinearity dimension resulting problem, offline, online, hybrid offline-online alternatives to SDRE are proposed. method reduces sequential solution Ly...

In this paper, a model reference adaptive control (MRAC) augmentation method of linear controller is proposed for air-breathing hypersonic vehicle (AHV) during inlet unstart. With the development flight technology, vehicles have been gradually moving to stage weaponization. During maneuvers, changes attitude, Mach number and back pressure can cause unstart phenomenon scramjet. Inlet causes sign...

This paper puts forward a novel output feedback model reference adaptive control (MRAC) scheme for solving an tracking problem. The proposed only needs scalar function to be updated online, which decreases the system adaptation complexity, compared existing MRAC schemes. Furthermore, closed-loop signal boundedness and asymptotic are guaranteed with scheme. A simulation study is carried out veri...

When the parameter of any systems changes with respect to time then the constant gain PI controller action is not effective. In case of MRAC based design the adjustable PI gain parameters corresponding to changes in plant will be determined by referring to reference model specifying the property of desired control system. This paper presents the method to design MRAC based PI controllerfor spee...

Recently, a novel high-starting torque scalar control scheme (HST-SCS) for induction motor(s) (IM) emerged. It expands the application field beyond centrifugal pumps, blowers, and fans, moving, instance, some conveyor belts with nominal loading. This paper proposes normalized model reference adaptive (N-MRAC) applied to HST-SCS IM. First, proposal extends MRAC, resulting inn class of nonlinear ...