To monitor the state of small hunting instability for the train at a high speed, aiming at the problem of mode splitting of ensemble empirical mode decomposition (EEMD), a new methodology which combines modified ensemble empirical mode decomposition (MEEMD), Shannon entropy feature and least squares...

From the reliability point of view, the main failure modes of load-split wind power growth planetary gear train are determined by failure mode and effect analysis method. The engineering practice and typical stress and intensity distribution are considered, the probability distribution of random variables...

Support vector regression (SVR) is a popular machine learning method that develops these years and has been widely used in the prediction field. But the input feature vectors largely affect the accuracy of the forecast er-ror, so the feature vector choice has been the hot issues of attention and research...

Aiming at the disadvantages of the traditional artificial potential field method, target is not reachable and the robot is easy to fall into local minimum point, the paper proposes an improved potential field function of arti-ficial potential field, a formula factor is added to the repulsive force field...

In order to study the changing characteristics of the driving torque, the driving power and the driving energy of all joints for the powered exoskeleton in the squat stance, multi-rigid-body system dynamics model of the powered exoskeleton was established based on the somatic structure characteristics...

In this paper, mainly research on a Live-working robot in power transmission line, it composed with Live-working robot unit and operation platform. The operation platform use to support the whole robot line up and down. Under the action of machine, insulation winch and the rope concerted action in order...

This paper focused on the torque distribution of master and auxiliary motor coupled driving system for the pure electric vehicle. With the minimum consumption of power as the target, the equivalent PESCM method was employed. The torque split maps of master and auxiliary motor were obtained .The simulation...

In order to improve the thermal efficiency and fuel economy of automobile engine, make full use of the waste heat of automobile exhaust for energy saving and emission reduction, a flat-plate type of thermoelectric power generation(TEG) device is designed which makes full use of the car exhaust gas waste...

In order to make better use of wave energy, based on floating wave energy device, a new asynchronous wave energy generation system is presented in this paper. Being different with traditional floating wave power gen-eration system in which the motion of hydraulic cylinder piston rod on both sides of...

The development of electric vehicle charging station have a directly influence on the promotion of. With large construction of charging station in China in recent years, it's of great importance to establish reasonable charg-ing station construction. According to the graphic appraisal method, we set...

This article on food emergency logistics system were reviewed, mainly summarizes the research progress in emergency logistics, large-scale natural disasters and public crises both have serious social impact and huge economic losses, emergency logistics system has an effective prevention and harm reduction...

There are several problems in air current conditioning system, such as low energy efficiency, equipment aging, low operation efficiency, unnormal function, and poor thermal comfort. In order to better deal these issues, some renovation methods (including installation of ground source heat pump system,...

Based on micro gas turbine, a wind-solar-gas complementary system was presented to explore efficiently method of new energy utilization. The output characteristics of photovoltaic power and wind power genera-tion were introduced in detail, and the power output according to the corresponding influence...

In order to reduce the influence of wind power integrated into grid in power system, carried out simulation analysis on static Var compensator control the impact of wind power integrated into grid process. On the basis of research on squirrel cage induction wind turbines and Static Var Compensator (SVC),...

According to the verification requirement of DC current transformer, a multi channel DC transformer calibration platform based on virtual instrument is designed and built. Using Laboratory Virtual Instrument Engineering Workbench (LabVIEW) programming, it can play a flexible, customizable, powerful data...

When the lightning trip accident happened on transmission line, the rate of counterattack trip is quite higher than shielding tripping. In this paper, the regulation method and ATP-EMTP simulation method are applied to analysis the result of counterattack trip rate in a practical 110kV network model....

In order to further calibration parameters on transmission line, it should be considered the influence of the ac-tual conditions of the transmission line, which runs adjacent to the transmission line parameters. For single-circuit transmission line through calculation and double circuit transmission...

For the measurement of zero sequence parameters of the parallel double circuit transmission line, the conven-tional off-line measurement method cannot meet the need of the zero sequence parameter measurement, this paper presents a hybrid measurement method, by applying a zero-sequence signal on line...

This paper is mainly to develop a measurement standard for insulation parameters on-line monitoring device. The paper achieves measurement standards for the Voltage, current, capacitance and dielectric loss data of in-sulation parameter monitoring device by voltage, current sync source generated by DDS...

In order to analyze the differences between HVDC system and DC system, this paper states the mechanism and function of the main controller in HVDC. Also the impact of each controller and regulator on the system is analyzed. The result shows that there are some key parameters in each controller, which...

In view of the security risks in live breaking and joining leads of 10kV cable, a kind of insulation support frame, which could fix cable leads effectively, was designed. Its mechanical strength was checked. Its mechanical behavior and electrical performance could meet the requirements of the regulations....

A pulse signal generator is designed to deal with the testing of the pulse counters for the measurement of the neutron fluence rates. It contains a microcontroller and a pulse generator circuit which consist of a high speed DA converter and a clock based on DDS to realize a square wave output with a...

The main protection configuration scheme of internal short circuit for large generators is a prerequisite founda-tion for large generators to run with safety and reliability. Firstly, we sum up the type and the quantity of in-ternal short circuit for stator windings for SFD250-20/7500 motor-generator....

This article describes an automated resistor that is based on a resistor network and the control algorithm of successive approximations. The resistor network, consists of relays and precise resistors, has a structure of re-ducing the effect of relay' contacts resistance. The nonlinear error of the network...

An active noise control system of power transformer is designed and implemented in this paper. EL-VB-FxLMS algorithm is used in the system as the control algorithm, the performance of which is analyzed and compared to BFxLMS algorithm. Based on EL-VB-FxLMS algorithm, a set of practice ANC system is built...

Injection molding machine motor pump system energy consumption models were established for dosing pumps, servo motor pumps driven and other different ways, to get the comparative analysis of different ways driving injection molding machine energy consumption. The injection molding machine pump system...

There are lots of negative effects caused by transformer noise. The energy of the noise is mainly distributed in several low frequency points shown by analysis of transformer noise characteristics. In response to these char-acteristics, this paper proposed a new power transformer active noise control...

Serial-stacked enhanced railguns are with bigger inductance gradient value than simple ones, which is im-portant to improving the energy efficiency and the railguns' launch force. On the basis that the structure and principles of serial-stacked enhanced railguns are introduced. We calculate the inductance...

In order to fully protect the safety of live working personnel, high electric vehicle must implement multiple safety protection. First is the safety of the hydraulic system, not in office under the condition of artificial ac-tive operation can realize self-locking; Then the insulation safety, in can't...

The performance for fuse electronic components may have degradation after long-term-storage. In order to as-certain the components which its performance has degradation, two fuse electronic parts, which have been stored for 10 years, are chosen as samples for an accelerated test. It shows that the white...

Rotating cylinder is a major categories of guidance ammunition now. In order to detect the performance of its guidance components, the hardware-in-the-loop simulation test is necessary. Firstly, a platform whose core is a three-axis turntable is established for the test. Then, two experiments are conducted...

The small-caliber artillery test ammunition is various, high precision in shooting range. But the Chinese domes-tic is still in the method of manual quantitative. In order to improve the accuracy and speed of quantity, re-searched common volumetric quantitative technology, weighing quantitative technology...

The research status of wind turbine aerodynamic noise is summarized. Firstly, summarizes the generate cause of the wind turbine aerodynamic noise. Secondly, from the study of the theory, experimental studies and nu-merical calculation research of the wind turbine, and emphasizes explain the method appliance...

In order to do large scale line length heat-sealing for the sound insulation cotton and resistance to flame clad-ding layer materials of new aircraft, the system has been improved according to the original heat sealing ma-chine temperature control system. It uses thermocouple sensor of high response...

From the study of mixed solid-liquid flow characteristics of viscous liquid, solid-liquid model of two phase flow for oil chili sauce in the stirring apparatus is presented in this paper. The impacts of turbulent flow field for stirred parameters in the stirring apparatus are studied. Combining with...

Energy saving, environmental protection, safety is the main focus of the topic in today's world automobile in-dustry, the automobile lightweight technology is an important way to achieve this goal. This paper takes the automobile lightweight technology as the research object, it studies the automobile...

In order to study the turbulent flow characteristics of nanofluid, this paper establish the nanofluid turbulent flow model in a spirally corrugated tube. In the condition of a certain temperature difference between import and export ( T = 60 K), different concentrations of nanoparticles ( = 0.01, =0.03...

This paper delivers the research on the core technology and the development tendency of the modern preci-sion machinery manufacturing. Precision technology development and application, to promote the machining precision of the whole mechanical manufacturing and technical level is of great significance...

Ejector type mixer has a hot water pipeline based on the Venturi tube. Cold water flowed from the left side of the pipe. After the gradual reduction of the pipeline, its speed went up and its pressure decreased, making vacuum degree in pipe throat and drawing hot water into the main pipe. After cold...

The rapid development of the large-scale equipment promotes the investigation on flow around rotating cylin-drical aerodynamic characteristics at supercritical Reynolds number. In this paper, the flow past a rotating cyl-inder at supercritical Reynolds number has been studied using the computational...

With the development of science and technology and the improvement of living standards, people in ensuring the precursor of family safety on quality of life and intelligent family life increasingly high expectations. But the quality of life only in terms of temperature and humidity real-time monitoring,...

Due to the operating poison is far, the line of sight is not good, inconvenient operation is caused when using the operator lever, in addition, replacing insulator need to be replaced different functions pin puller. To solve the problems, this paper development a visual multifunction control lever and...

With the progress of science and technology, more and more people pay attention to the research of robot technology. Comparison of biped robot, chassis wheeled mobile robot in moving speed, stability, application scope, carrying capacity has obvious advantages on, and especially the application field...

Aiming at the high voltage circuit breaker three-phase permanent magnet brushless DC motor, this paper studies the motion characteristics of the motor operating mechanism under different control strategies. Considering the switching operation process of high voltage circuit breaker, we established the...

The piggyback transportation is still blank in China. The paper describes the loading plans of the piggyback transportation and confirms the adaptation of railway gauge. Finally, the paper calculates the forces which act on the truck on the moving piggyback flat car, and tests the stability of van-body...

Based on mechanical analysis of main beam structure in track hanging, the design optimization problem of weight of the girder structure was transformed into solution of optimal parameters values under mechanical constraints optimal parameters. Adopting structure geometry value as input parameters, structural...

Baosteel cold rolled sheet production equipment technology has very important position in Baosteel steel pro-duction, and the DSR roll is the key components in the cold rolled sheet production equipment. This paper conducted the research on key technology of DSR roll, in view of the DSR roll exposed...

Designed in this paper, the energy-saving electronic 10kV metering device is composed of electronic voltage transformer, electronic current transformer, electronic metering terminal and communication terminal. Electronic transformers and metering terminal are no longer designed and tested independently....

Aiming at the problem that fault feature of wind turbine bearing is difficult to extract, a new fault diagnosis method based on variational modal decomposition (VMD) and spectral kurtosis (SK) is proposed in this pa-per. Firstly, vibration signal collected from wind turbine is decomposed into several...

In order to assess tactical and technical index of a certain type of missile warhead, calculated warhead muzzle velocity and damage capacity for using of theoretical analysis. Combined with the results, design the new tar-get emplaced scheme. To the particularity of warhead structure and measured data,...

Aiming at the thermal comfort problems brought from anti-riot helmet in high temperature, an study of meas-uring the temperature of head skin based in the anti-riot helmet micro environment is designed, and thermal comfort of the volunteer is evaluated through the skin temperature and the volunteer's...

It is difficult to verify the reliability of a new type of ammunition components through traditional statistical testing methods. And the accelerated life test of ammunition components at the present often requires a large amount of sample size. The calculation model for minimum sample size of the Inertial...

The paper focus on the problem that a certain type of rapid rate firing gun, which the army equipped, it's muz-zle velocity is difficult to measure. On the basis of summing up the advantages and disadvantages of all kinds of muzzle velocity measurement method, the paper put forward the phase measurement...

In order to improve the reliability of mining electrical equipment and realize intelligence of the separation test of the coal mine isolation switch operation process, the motor mechanism is put forward. We designed con-trollable testing system based on coal mine isolation switch breaking test the existing...

The electro spark deposition (ESD) is an ideal process tor material increase manufacturing in many industrial sectors. In this paper, simulation of electro spark deposition and thermal analysis for this technology on Cr12MoV steel is presented with the finite element software. Material deposition is...

Unmanned Surface Vehicle (USV) is a small surface naval vessel which navigates and plans by itself. And undoubtedly, it plays a vital role in now and future naval battle and sea rescue. Adaptive course control is a necessary part of USV control, and in recent years, many researchers have done plenty...

The expression for the elastic field of an expanding ellipsoidal inclusion in an infinite isotropic elastic medium is presented. The influence area of a subsonically expanding ellipsoidal inclusion is given in the form of ex-pressions and graphs. And the difference of the influence area between ellipsoidal...

Cross-rail is a key component of support structure of the machine, whose mechanical properties have direct impact on the accuracy and dynamic performance of the machine. This paper studied a bridge type milling composite extrusion CNC machine whose cross-rail welded together by a rib structure, therefore,...