Abstract This paper investigates the problem of robust asymptotic stabilization for a class uncertain neutral‐type systems with time‐varying delays. A sufficient condition is obtained to ensure considered system disturbance attenuation level , which based on sliding mode observer framework. Meanwhile, novel integral surface function compensator proposed make sure can be stabilized. And gain matrix by solving strict linear inequality. Finally, two numerical examples are provided demonstrate...

This article is devoted to designing linear sliding surface and adaptive mode controller for a class of singular time‐delay systems with parametric uncertainties external disturbance. In terms matrix inequalities (LMIs), sufficient criteria H ∞ performance, admissibility considered motion restricted achieved, the which guarantees finite‐time reachability predesigned then developed, respectively. Finally, three examples show effectiveness proposed result. © 2016 Wiley Periodicals, Inc....

In this paper, we describe a novel multiple-switch pulsed-power technology. The basic idea is that the heavy switching duty shared by multiple switches. switches are interconnected via transmission line transformer, in such way all can be synchronized automatically and no special external synchronization trigger circuit required. It produce either exponential or square pulses, with various voltage current gains high degree of freedom choosing output impedances. topology has been implemented...

In order to solve the restrictions, imposed by position sensor, on application of permanent magnet synchronous motor (PMSM) in robot field, a rotor estimation method based super-twisting sliding mode observer (STSMO) is proposed. The built according back electromotive force (EMF) model after EMF equivalent signal obtained. this way, not only are low-pass filter and phase compensation module eliminated, but also accuracy improved. Then, Lyapunov stability analysis carried out verify SPMSM...

The motion quality of the robot is determined by dynamic response and static performance internal motors. It a simple effective way to analyze decoupling control system into multiple single motor systems. can obtain excellent which driven permanent magnet synchronous (PMSM) under direct torque (DTC) strategy, but there exit large ripples in system. In this paper, novel scheme based on space vector modulation (SVM-DTC) proposed, used new controller replace hysteresis comparator that...

Affected by the signal sampling, processing and executing delays, conventional dead-beat control is actually a one-step-delay control. To solve this problem, an improved method discussed in paper. The calculates output average voltage one sampling period earlier using prediction reference current value two sample instants advance inverter instant advance, then "real" will be achieved. A mixed strategy also proposed considering both steady dynamic states of load, which make process better...

Aiming at the problem of slow response and low tracking accuracy in synchronous reference frame phase-locked loop (SRF-PLL) estimation permanent magnet generator (PMSG) rotor position when wind speed changes suddenly, a method based on discrete set loop(DPS-PLL) is proposed. The estimated certain moment selected from discretized alternative set. Then, combined with sliding mode observer, obtained by calculating back-EMF cost function. experimental results demonstrate can be detected...

The aim of this paper is to explore the use particle swarm optimization (PSO) algorithm optimize design permanent magnet couplings subject several key constraints. A nonlinear model developed by support vector machine. that has obvious capabilities in global search finally adopted find optimal machine parameters. Finite element method also employed verify results.

In order to eliminate the impact of time delay active power filter(APF), a novel predictive control based on variable-step LMS is proposed in this paper. Taking into account weights errors and influence previous state, step size varies with both forgetting factor follow-up factor. Forgetting can change according tracing error enhance capacity resisting disturbance. As introducing variable-step, performance improved under steady dynamic condition. The simulation between method traditional...

Chaos may be degenerated because of the finite precision effect, hence, in this work, for given a new fractional order three-dimensional chaotic attractors, numerical investigations on dynamics system have been carried out. The stability equilibrium is analyzed according to qualitative theory. Furthermore, control technique designed, special compound structure attractor investigated, and some simulations are proposed. results show that can generate complex under constant parameter. This...

In this paper, the trajectory tracking problem of industrial manipulator with fixed periodic external force on human-robot cooperative assembly line is studied. An advanced fuzzy adaptive supertwisting sliding mode control (FASTSMC) algorithm proposed to realize rapid convergence and continuous nonlinear system. order enhance robustness system, an arctangent terminal surface designed deal concentrated uncertain disturbance. The method used overcome chattering in law. technique compensate...

Permanent magnet drive (PMD) design problems are studied and a multi-objective optimization approach based on Kriging approximate model is put forward, which takes variety of structural parameters performance (such as thickness permanent magnets, air gap, etc.) variables the minimum eddy current loss maximum out torque double goals. Firstly initial sampling data obtained with orthogonal experiment finite element method (FEM); then between structrual set up method; finally structure PMD...

With the existing problem of static error and overshoot DC bus voltage control methods, a hybrid active power filter system was designed. Considering special characteristics control, parameter self-tuning fuzzy PID method combine with is proposed. Compared traditional method, this has feature robust, small steady-state error. Simulation results prove that possesses excellent Correctness Feasibility.

The motion quality of the robot is determined by dynamic response and static performance internal motors. It a simple effective way to analyze decoupling control system into multiple single motor systems. can obtain excellent which driven permanent magnet synchronous (PMSM) under direct torque (DTC) strategy, but there exit large ripples flux linkage caused inverter nonlinearity in system. These are analyzed order main harmonics determined. With using adaptive notch filters (ANF) branch,...

According to the structure parameters of eddy-current driver, this paper established magnetic field analytical model driver by utilizing method equivalent surface current. We calculated and analyzed with help MATLAB simulation software. The purpose was explore regularity field. Then result compared that finite element measured values. showed space distribution axial on copper conductor plate eddy current drive periodically distributed along circumferential Angle. error analytic is less than...

When fault occurred in power grid, the location method based on aerial mode velocity and zero of travelling wave will reduce accuracy location, because that vary with variance frequency. To solve this problem, a combined for characteristic frequency is proposed paper. Firstly, analyzes velocity. Secondly, it calculates similarity index initial reflect under each band. And then choose band biggest as Then calculate to do preliminary correct using model finally. PSCAD/EMTDC simulation built...

An optimal uniform-damping ratio controller is developed for the sequential design of a multivariable control system so that designed closed-loop poles respective and reduced-order observer are exactly placed on negative real axis and/or boundaries desired sectors with constant-damping ratios. The functions in quadratic performance index to be minimized chosen as combination weighted outputs, reduced states inputs. Also, output-feedback state-feedback controllers. A numerical example given...

Abstract With the popularity of renewable energy sources, fault‐tolerant frequency stability distributed generation systems has become a major challenge. This paper proposes an optimal control method in system, utilizing adaptive dynamic programming combined with fuzzy critic estimation. First, based on operational state non‐linear model for virtual synchronous generator is established. Then, considering occurrence actuator faults, problem formulated as problem, where fault observer designed...

In order to solve the phenomenon of bus voltage resonance instability caused by negative impedance characteristics constant power load in DC system, a sliding mode controller based on overtorsion algorithm was designed. Firstly, space state equation converter is derived according switching converter, and surface created using error between inductor current output converter. Then, convergence stability are judged combining super twisting with Lyapunov theorem. Finally, simulation software...