1 I n t r o d u c t i o n Many mechanical systems are subjected to periodic disturbances which may adversely influence the mission performance, effectiveness, accuracy of operation, and life cycle. Examples of such systems include: torque pulsations in DC and stepper motors at the frequency of rotation and its integer harmonics [1], rotating pump in a cryocooler expander [2], rotating magnetic ...

sleep plays a vital role in regulating physiological mechanisms in the human body. nowadays, by the change of lifestyle and as a consequence of longer work hours and increased accessibility to media, sleep disturbance becomes a common problem in modern society. many studies demonstrated that sleep disturbance triggers a systemic low-grade inflammation by increasing the level of several cytokine...

Direct impedance control (DIC) technique used for an electroacoustic absorber in this paper requires a pair of pressure and velocity sensor. However, it can be quite costly to develop array system of this electrostatic absorber for acoustically large space. To overcome this problem, in this paper instead of using velocity sensor, disturbance-observer-type velocity estimator is applied to DIC te...

Aiming at the speed regulation problem of permanent magnet synchronous motor (PMSM) drives, a novel backstepping nonsingular terminal sliding mode control (BNTSMC) method with finite-time disturbance observer (FTDO) is proposed. In order to ensure excellent tracking and anti-disturbance performance, controller based on equivalent model recursive principle designed for PMSM. The benefits this ap...

Abstract Aiming at the problem of unmanned aerial vehicle (UAV) attitude control with insufficient robustness and anti-disturbance, this paper proposes a UAV method combining incremental nonlinear dynamic inverse (INDI) neural network (NN) adaptive compensation. Firstly, model time scale separation is proposed. On basis, INDI law derived, angular acceleration information required by feedback fi...

To solve the problem that trajectory tracking control system of unmanned helicopter is limited by accuracy physical model (parameters and dynamic characteristics) external disturbance helicopter, this paper designs a based on linear/nonlinear hybrid Active Disturbance Rejection Control (ADRC). At same time, proposes method for tuning controller parameters Bacterial Foraging Optimization-Flower ...

In this paper, an adaptive sliding mode disturbance observer is designed to counteract the actively. By designing laws, assumptions on are relaxed in proposed observer, its first derivative upper bound considered be unknown. Based output feedback controller constructed for continuous-time linear systems with unknown external disturbance. The incorporates only system information and has less cha...

This paper presents a robust control method for the trajectory of robotic manipulator. The standard Computed Torque Control (CTC) is an important in systems but its not to system uncertainty and external disturbance. proposed overcome disturbance problems. In this paper, robustification term has been added CTC. stability approved by Lyapunov theorem. performance presented controller tested MATL...

This paper relates generally to sliding mode control (SMC) system based on uncertainty and disturbance estimation (UDE) and more particularly to a system, with the presence of high frequency measurement noise and unmodeled dynamics. Higher order dynamics are difficult to identify and remain excluded from theoretical model of the system, generally the main cause of instability. The presence of u...

In this paper, H2/H∞ control problem for linear stochastic system governed by Itô differential equation with state and external disturbance dependent noise involving multiple decision makers is investigated. A novel strategy concept for reliable decision is that Stackelberg game strategy is applied. As a result, the decision makers are able to induce the disturbance as if the disturbance is opt...