Due to the vitality of the SPWM technique in industry of the power conversion devices, this paper suggests a new harmonic distortion minimization technique so far called multi-tone SPWM. This proposed technique aims to inject the modulating waveform with a high frequency component at the low voltage...

For the nonlinear robust control difficulty in the MIMO system, which has many uncertain parameters, the state extending and filtering robust control (SEFERC) is proposed. The uncertain nonlinear part of the MIMO is extend to the new state parameter and can be estimated. With the estimated value, combined...

Blade tip-timing is an effective method for blade vibration online measurement of turbomachinery. The majority of tip-timing systems require a once-per revolution (OPR) sensor installed close to the shaft to generate timing reference. In this article a tip-timing signal preprocessing method which requires...

Human-Robot Collaboration aims at exploiting the different but complementary skills of both the human worker and the programmable machine. It requires a high degree of interaction between the two actors and it is accomplished by special devoted robots. The study shows it is possible to redesign existing...

A permanent magnet synchronous motor (PMSM) drive control system for drive machine tools includes nonlinearities, uncertainties and external perturbations that should be considered in the design of control laws. A quantification factor self-tuning fuzzy PID controller for drive system is suggested by...

Based on the understanding of the communication methods and the structure and architecture of databases/data blocks of numeric control (NC) system, an open source communication suite designed specifically for Siemens NC system, Snap 7, is used to realize data acquisition from Siemens 840D sl NC system...

Mattress overlapping recognition is of great significance in tracing and detecting the quality, and provides reference data of mattress laying. The recognition process includes the generation and image correction of the color sinking sonar image, the image segmentation and the recognition of mattress...

In order to prevent the maloperation of the transformer differential protection device affected by transformer magnetizing inrush current and internal short circuit fault current, the device should be able to identify the internal fault current and inrush current. Accordingly, this paper is aimed at...

For high precision detection of hydraulic proportional solenoid valve pressure, sealing properties and steady pressure characteristic performance indexes, independently design a solenoid valve performance testing platform, which has a high level of automation. Its core based on PLC controller and touch...

This paper studies the problem of loading torque control for passive electro-hydraulic servo loading system with the external disturbance and parameter uncertainties. The state space model is established based on the nonlinear mathematical model of the system. Based on backstepping technique, an adaptive...

The voltage and current double closed-loop control strategy is usually used in three-phase voltage-source PWM rectifier control. However the nonlinear characteristic of the voltage equation gives more trouble to design this control strategy. A comparative study of two kinds of linear instantaneous power...

Under actual operating conditions, the yaw velocity of boom roadheader has direct influence on the efficiency and reliability of boom roadheader. The PID control method which uses neural network establish the intelligent control system of boom roadheader yaw, based on the MATLAB surface fitting technique,...

This paper introduces the principle of the automated subsidence monitoring system, and pointed out that it is not ideal for the identification of the interference caused by the interference of the external environment and the wide range of environmental temperature range. And then put forward the solution,...

The usage of infinite-rotate servos has been pervasive in 3D robot assembling. Hardware companies have been providing expensive infinite-rotate servos for years. But considering limited fund of individual 3D-printed robot project, existing infinite-rotate servos in market are too expensive. This paper...

A portable system has been designed to enable monitoring of autonomic nervous Activity. The present invention discloses a portable, simple, and cost-effective electronic device containing hardware and software that permit real-time monitoring of photoplethysmography (PPG) waveform. HRV parameters including...

Planetary gear box has the characteristics of small volume and large transmission ratio and is widely used in construction machinery. After a long period of operation, the gear fault occurs frequently, which has a great influence on the equipment. However, due to its complex structure, the fault signal...

The analysis of perforated members is a 3D problem in nature, therefore the traditional analytical expressions for the ultimate load of thin-walled steel sections can't be used for the perforated steel member design. In this study finite element method (FEM) and artificial neural network (ANN) were used...

This paper studies the problem of finite-time H-infinity filter design of discrete Markovian jump neural networks with time-varying delays and norm-bounded disturbance. The definitions of stochastic finite-time boundedness and stochastic H-infinity finite-time boundedness are first given. Then, an H-infinity...

This paper studies the problem of the precision of thrust speed and pressure compound control under the uncertain external load condition for shield tunneling machine. An controller about thrust speed and pressure is designed based on the traditional PID control algorithm combined with BP neural networks....

According to multivariate chaotic time series prediction problem, this paper establishes a multivariate chaotic time series forecasting model with nature structure import data based on NARX neural network. The simulation research of Lorenz chaotic time series proves that the forecasting precision of...