Active noise control (ANC) technology has extensive applications in suppressing sound pollution the real-world environment. In this paper, a new adaptive neuro-fuzzy network (ANFN)-based controller is presented and integrated into hybrid active (HANC) systems to improve robustness effectiveness of suppression. Specifically, an neural constructed minimize mean square error information with respect residual noise. Moreover, fuzzy logic strategy proposed address manual fine-tuning...

In this paper, a simple but effective control scheme is proposed for bilateral teleoperation systems with variable communication time-delays. The robotic models are first reformulated and an unknown system dynamics estimator (USDE) constructed to estimate the lumped uncertainties without using accelerations, where only low-pass filtering operations trivial algebraic calculations used. USDE then incorporated into controller design compensate effects of uncertainties. stability closed-loop...

The aero-engine wide-chord hollow fan blade with a cavity stiffener structure can effectively reduce the weight and greatly increase rotational speed. However, during high-speed rotation process of fan, there is strong coupling effect between solid domain incoming air. This leads to certain deformation rotor blade, which has large impact on structural strength blade. Aiming at problem fluid–structure interaction in its operation, finite-element method was used simulate two-layer TC4 titanium...

Abstract Conventional piezoelectric cantilever-based vibration energy harvesters have narrow bandwidth. In this article, we develop a dual-beam harvester featuring an annular potential function that can harvest over wide spectrum under small amplitude excitations. The proposed contains two conventional cantilevers placed orthogonal to each other which are coupled by repulsive magnetic force. We demonstrate analytically and numerically new be configurated with proper configuration. the stable...

Optimization for vertical vibration performance of a rail‐train coupling system is investigated in this paper with the introduction inerters both primary and secondary suspensions. A model typical Chinese passenger train that travels on traditional rail track, sleepers, ballast simulated. The goal to improve ride quality attenuation response track irregularities. Optimizations only inertance all suspension parameters are carried out by particle swarm algorithm (PSO). Performance benefits...

Based on the current status of development power distribution cabinet, as well intelligent network technology and equipment needs, this paper through analysis proposed a new cabinet design to meet technical requirements smart grid. The scheme is based primary function, function secondary equipment, IEC61850 standard switches, GSM/GPRS alarm design, fully embodies characteristics intelligent, digital electrical parameters, can make realize protection, measurement, control management. It solve...

The electromagnetic noise suppression characteristics of a series FeCoBM -Al2O3 amorphous soft magnetic films were reported in the frequency range from 0.5GHz to 6 GHz. Effect dopants on reflection coefficient (S11), transmission (S21) and power loss (PLOSS/PIN) as-deposited FeCoBM(M=Nb, Zr, Hf, Ta, Mo, Ti)-Al2O3 studied. (Fe40Co40B20)89Mo8–(Al2O3)3 film had highest with value 0.85 at 6GHz. properties FeCoBNi-Al2O3 also studied paper. (Fe40Co40B20)68.36Ni28.64–(Al2O3)3 was more than 0.6...

Static and dynamic characteristics of grinding machine column structure experientially designed are studied based on finite element models. Then propose modifications, analyze characteristics, select the better one. Study natural frequency changes in sensitivity wall thickness rib thickness, determine parameters to be optimized. Expert Design software is used finish experimental design parameters, establish second-order response surface model. So far a multi-objective optimization model set...

Time-varying delay, as one of the most prominent issues existing in teleoperation system, throws a critical threat on system stability. To address this issue, paper proposes novel synchronization control for nonlinear uncertain bilateral systems presence time-varying delay. Firstly, filter error variable is designed to avoid using both local and remote acceleration signals. Then, set first-order low-pass operations are employed construct an unknown dynamics estimator (USDE) handle dynamics,...

Bolt looseness would lead to hazardous damage engineering structures. Neural network-based algorithms can effectively monitor health conditions using the impedance signal. On other hand, data is difficult obtain, and has an imbalanced distribution. In this research, we propose a augmentation method based on Variational Autoencoder (VAE) model with channel attention spatial mechanisms. This takes advantage of VAE generate additional resolve issue sample. The new dataset then fed into...