This paper presents a new method of improving the disturbance-rejection performance servo system based on estimation an equivalent input disturbance (EID). First, concept EID is defined. Next, configuration improved employing disturbance-estimation described. Then, designing control law estimate explained. Finally, speed rotational used to demonstrate validity method, and some design guidelines are presented.

This paper presents an improved equivalent input disturbance (EID) approach to deal with exogenous disturbances and system nonlinearities. The nonlinearities are regarded as a lumped on the control channel. EID approach, which has state observer estimator, is used estimate disturbance. There constraint between estimator design of for conventional approach. A stable zero was added remove improve stability in this paper. ensures that can be designed independently. An analysis explains...

This article presents an improved equivalent-input-disturbance (EID) approach to handle unknown disturbances and plant uncertainties. The uncertainties are treated as a lumped disturbance in EID-based control system. effect of the is compensated by EID estimator. A constraint between design parameters imposed on In addition, there insufficient analyses influence performance stability new filter devised for estimator this remove constraint. ensures that sensitivity system at low frequencies...

This article addresses the control problem of an open-loop unstable linear time-invariant system with input delay and unknown disturbance. An observer-predictor-based method is presented for such a in which only output information available. First, state reconstructed disturbance estimated using equivalent-input-disturbance approach. Next, future on predicted to reduce effect delay. Then, new predictive scheme developed. The closed-loop simplified into two subsystems analysis. Stability...

As solid-state LiDAR technology advances, mobile robotics and autonomous driving increasingly rely on multiple LiDARs for perception. However, limited or non-overlapping fields of view (FoV) among these sensors pose significant challenges extrinsic calibration. Moreover, there are no quantitative indicators to evaluate calibration quality currently. To tackle challenges, we introduce LiDAR-Link, a novel approach evaluation, consisting LiDAR-Bridge LiDAR-Align. uses wide-angle act as an...

Disturbance rejection and time-delay compensation are important for control systems in practice. This article presents an observer-and-predictor-based method to reject unknown exogenous disturbance input-delay system which only delayed output is available. First, the equivalent-input-disturbance employed reconstruct state estimate disturbance. A prediction of calculated reduce effect a phase lag caused by delays. new predictive scheme designed feedback control. Next, divided into two...

A robust disturbance-rejection problem for an uncertain singular system is considered in this paper. An equivalent-input-disturbance (EID) method applied to improve performance. At first, the disturbance estimation obtained by EID method; Then, compensation control input channel offset adverse effect of external and uncertainties on system. Two sufficient necessary conditions using linear matrix inequality are obtained, which can guarantee admissibility (regularity, non-impulsiveness,...

This paper investigates the performance of three active disturbance-rejection methods: disturbance-observer-based (DOB) control, disturbance rejection control (ADRC), and equivalent-input-disturbance-based (EID) control. Compared to classic feedback these methods provide an additional degree freedom reject disturbances effectively. First, mechanism each is analyzed. For a proper design, transfer function from output system approximates zero using methods. implies effect blocked output. Then,...

Abstract A particularly simple two‐parameter relation for the variation of product bulk modulus and volume thermal expansion coefficient solids with changing temperature has been found. The relation, although empirical, fits all minerals tested. We used this isobaric equation state compared other equations state. excellent results show that it can be successfully applied to study behavior from room high temperature. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

This paper describes an approach for suppressing earthquake-induced vibrations of building structures. The design the control system is based on equivalent-input-disturbance improving vibration rejection performance. A configuration with a estimator described, and method designing such that employs Η ∞ presented. performance guaranteed by structure, in which equivalent signal input channel estimated directly incorporated into input. validity our demonstrated through simulations.

Stable control of the ball mill grinding process is very important to reduce energy losses, enhance operation efficiency, and recover valuable minerals. In this work, a controller for designed using combination model predictive (MPC) with equivalent-input-disturbance (EID) approach. MPC has been researched applied widely as one multi-variable algorithms grinding. It used decouple in real time. The design does not deal disturbances directly. However, strong such those caused by ore hardness...

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An improved equivalent-input-disturbance (EID) approach is presented in this paper to promote the transient performance of disturbance rejection control system. A high-gain observer (GO) introduced conventional EID method accelerate convergence state error. This makes estimated tracking exogenous more quickly and precisely. First, configuration an EID-based system described. Then, a sufficient stability condition derived terms linear matrix inequality (LMI). The resulting LMI used find gains...

Efficient design techniques are presented for improving the response of seismic-excited buildings under actuators with limited capacity. The controller, which is based on concept equivalent input disturbance, suppresses earthquake-induced vibrations. controller produces an estimate vibration control channel, can be used to directly suppress seismic shocks. configuration system guarantees effective shock suppression. Information about actuator saturation taken into consideration. A...

In this paper, a sliding mode control (SMC) for the direct torque system to speed of permanent magnet synchronous motor (PMSM) is developed. order further suppress ripple, chattering and disturbance system, an equivalent input (EIDC) method adopted. Thus, composite strategy combining SMC EIDC, called SMC- EIDC strategy, proposed PMSM system. Simulation results demonstrate that has achieved better performance with fast responses. The makes less chattering, shorter settling time, overshoot on

To explore the consistency of parameters lumbar spine pelvic sagittal plane between whole EOS images (EOS) and traditional X-ray imaging.A total 50 patients (26 males 24 females) hospitalized in Spine Surgery Department Beijing Jishuitan Hospital from May to July 2019 were selected for standard standing full-length anterolateral anterior lateral X-rays. Two attending physicians used Surgimap software measure incidence (PI), tilt (PT), sacral slope (SS), lordosis (LL) two types repeated these...