In order to predict the wear fault of disc cutter in shield machine, a BP neural network model was established and then trained by inputting several groups of disc cutter wear fault samples data including cutter rotate speed, cutter head torque, tunnelling speed, total thrust force and soil pressure...

In electric toy tests, the creepage distance and clearance tests are related to techniques of various fields and there are no specific measurement paths and rules in relative standards, which results in the big difference in test results. In this paper, the technical requirements of the creepage distance...

The traditional universal driving joint has the friction and wear, so its moving parts would get hot and its dynamic performance would become worse when working. Based on the Integration of motors, magnetic levitation, robotics and other techniques, a novel magnetic levitation spherical reluctance active...

In order to study the student occupant injury risk of school bus at the driving speed exceeding 30km/h, the numerical simulation model of children occupant restraint system of school bus was built using software LS-DYNA 3D. According to the China regulation of GB24406-2012, the model was loaded with...

One-armed planet carrier's static stress analysis and modal analysis were accomplished by the finite element method. The deformation, stress magnitude and distribution and natural frequency of the planet carrier were obtained. Under the condition of satisfying the ultimate strength and fatigue life,...

The measuring and monitoring of the support reaction of the aerial work platform is an important method to prevent its overturn. In view of the fact that the turntable is in a rotational movement during the whole process, it is easy to cause the tangling of the signal cable if using the traditional wired...

A half-bridge light emitting diode drive resonance power supply which consist of power factor correction rectifier and inductor-inductor-capacitor resonant topology circuit, the controller for each part is ST6562 and L6599 chip, respectively. This design and analysis has been presented. The MATHCAD is...

The paper presents the control strategy to solve the problems that multiple-freedom force and displacement coupling existing in the bilateral servo force-feedback control architecture for tele-operation parallel manipulators. The control strategy transfers the values of the working resistance connected...

Aiming at the existing problems of traditional equipment fire system maintenance training, the semi physical maintenance training is researched, analyzes the main task of fire system maintenance training, researches on key technology of semi physical maintenance training system, makes the overall design...

With the wide use of automatic production line in manufacturing enterprises, it is very important to calculate the optimal production tact to make production lines achieve maximum productivity. A CE-PSO algorithm is applied to optimize the tact of the LED bulb production line in this paper. The main...

Delta 3D printer is a kind of 3D printer with parallel structure. It is easy to print and has wide adaptability. However, the complex installation, plugging of print head, surface quality of printed parts and quality of printing head limits the development of its application. This paper analyzes the...

Based on RLC series circuit of sensor electronic components with nonlinear capacitance research object, the first approximate solution of third superharmonic resonance of the nonlinear vibration system is obtained by means of the method of multiple scales for nonlinear oscillations. The third superharmonic...

In this paper, the structure of CAD system for gauge has been established. By creating parameters model of gauge, smooth limit gauge is developed and designed using the computer aided design calculations in the environment of VC6.0 and UG NX 6.0, in order to improve the gauge design efficiency, the use...

For large heavy-duty rotary table, in order to improve the machining precision of the workbench in practical work, the workbench is usually set above the oil film with stable thickness. Therefore, the accurate measurement of the oil film thickness of the workbench hydrostatic guide rail is very important...

Blade is one of the core components of the aero-engine, which requires a high degree of geometric dimension precision, so strict geometric shape detection and evaluation is very necessary to guarantee blade machining quality. Twist error is one of the important parameters of blade quality evaluation,...

It is important to the aero-engine blade's profile inspection that the aero-engine blade's surface is highly complex with distortions. But its dimensional inspection demands a large number with measurement method most adopts the coordinate measuring machine (CMM). And the rational measurement path planning...