This paper proposes a parameter-independent speed controller based on the classical cascade speed control strategy comprising an inner-loop current controller and an outer-loop speed controller for permanent magnet synchronous machines. The contribution of this paper is three-fold: the first is the proposal of a parameter-independent current controller in the inner loop with global asymptotic s...

In this paper, we propose a new technique used to design a robust controller that is not as high-order and complicated as the ones designed by conventional Η∞ loop shaping method. To overcome the problem we proposed an algorithm called Genetic Algorithm (GA) based fixed-structure Η∞ loop shaping control. In the approach, GA is adopted to solve the Η∞ loop shaping design problem under a structur...

In this note, a new performance preserving controller order reduction method is proposed. Here performance preservation indicates that the norm bound of the closed loop transfer function with reduced-order controller is not greater than the norm bound of the closed loop transfer function with full order controller. We assume additive perturbations to the closed-loop transfer function and obtain...

<abstract><p>This article considers a consensus problem of multiagent systems with double integrator dynamics under nonuniform sampling. In the considered problem, maximum sampling time can be selected arbitrarily. Moreover, communication graph change to any possible topology as long its associated Laplacian has eigenvalues in an arbitrarily region. Existence controller that ensures...

An effective wide band active control law through one kind of the Dynamic Vibration Absorber (DVA) is proposed and studied in this paper. With the help of mechanical impedance method, active DVA control law is formulated based on the passive mechanical model. The electrical DVA can generate multi-mode active damping to the structure. The host structure is an aluminum plate and acceleration sign...

Although LCL filters are used widely in the grid connected inverters to reduce high-orderharmonics, such a system increases system order and therefore sustainable design of closed-loopcontroller system will be complicated. Recently, the single-loop control strategy has beensuggested for L or LC filter based grid-connected inverters. However, the use of single-loopcontrol directly in LCL filter-...

A systematic controller design and implementation for a matrix-converter-based induction motor drive system is proposed. A nonlinear adaptive backstepping controller is proposed to improve the speed and position responses of the induction motor system. By using the proposed adaptive backstepping controller, the system can track a time-varying speed command and a time-varying position command we...

One of the main problems of car-like robot is robust path following in the presence of sliding effect. To tackle this problem, a robust mix H2/H∞ static state feedback control method is selected. This method is the well-known linear robust controller which is robust against external disturbance as well as model uncertainty. In this paper, the path following problem is formulated as linear matri...

Interleaved DC–DC converters have significant advantages in improving the capability of power converters, and coupling filtering inductor converter could further increase density. However, existing modeling controller designs are complex require multiple sensors to be involved control, which is not conducive engineering implementation reducing production costs. In view this problem, taking a tw...

This paper presents a new nonlinear adaptive tracking controller for a class of general time-variant nonlinear systems. The control system consists of an inner loop and an outer loop. The inner loop is a fuzzy sliding mode control that is used as the feedback controller to overcome random instant disturbances. The stability of the inner loop is designed by the sliding mode control method. The o...