On the basis of the classical semi-disretization method (SDM) proposed by Insperger, an improved SDM and its algorithm were implemented in this paper. With the developed module, the chatter stability of milling process can be predicted. As the dichotomy search rather than sequential search is applied,...

In high precision three coordinates measuring machine in the process of measurement, dynamic error analysis has been improved measuring machine precision and speed is an important subject. Three coordinate measuring machine structure in the movement of the dynamic deformation of the theoretical points....

In view of the situation that the transmission elements of YS3118 CNC gear hobbing machine are too many and complicated, leading to transmission errors which cannot guarantee the machining precision, Based on SOV theory, with CNC gear hobbing machine as example, the method of using state-space model...

Using the method of complex analysis and through constructing new conformal mapping functions, we analyzed the plane elasticity problem of static cracks in finite-width single-edge cracked strips, and provided an exact analytical solution to the crack-tip stress intensity factor.

Dynamic model of 4X4 vehicle was researched in this article, the mass,damping and stiffness matrices were deduced through lagrange theorem. On the other hand, model transfer function was got by fourier transform of differential equations, after that, random excitation coherence function of 4 wheels and...

Assembled camshaft (AC) technology is a type of neo-manufactured technology of camshaft by which components are machined separately and assembled together. Compared with traditional integral-type camshaft, AC has advantages of lighter weight, material saving, compact structure and excellent performance,...

With the constant improvement of the level of industrial automation, robots are increasingly used in various fields of industrial production which is one of the most widely used welding robot. Today, however, people mainly adopt teaching methods to control the robot manually, it has some shortcomings,...

Chromatographic separation is the most frequently techniques used in research on the infochemicals and chemical analysis of natural products. In this paper, three secondary metabolites were isolated with fat-soluble substances from the black ants, Polyrhachisvicina Roger by normalphase high-performance...

Take a vehicle mounted DMF(dual mass flywheel) drive system as an example, Inherent characteristics and response characteristics of automotive transmission system is calculated by the simulation software. The results show that reduce the stiffness K8 between DMF second quality and transmission gearbox...

Occupant head protection is very important in frontal impact. In this paper, a restraint system model was built with Hybrid 50% dummy in MADYMO, and then the parameters of belt and airbag were adjusted to consummate the model. Then the effects of different seat longitudinal position and seatback angle...

To verify that a forward displaced position has effects on the driver injury levels in front-end collisions and estimate the injury levels in real accidents under this situation, a series of sled tests were conducted with dummy in different forward displaced positions. Injury response values of different...

Aiming at the development request of miniature farm machinery in our country, to improve the efficiency of the concept of small agricultural machinery design, put forward a kind of small agricultural machinery modeling method based on ontology, the modeling method and form a complete set of symbol system...

The functional information model of the technical system based on the component unit model is the basis of the analysis of computer aided function. Through the introduction of graph theory knowledge, establishing technical system function directed graph's adjacency matrix and reachable matrix. The establishment...

This paper presents a mathematical modeling method about magneto-rheological fluids(MRF) in disk-damper for controllable damping hand-muscle developer which used for hand rehabilitation. In our research, the characteristics of magneto-rheological fluids based on Bingham plastic model were analyzed, the...

This article analyses the fluid dynamic characters of bloodstream in Y-type coronary artery based on fluid dynamics. Velocity at the inlet is given for boundary condition. The speed is equally distributed. The fluid conditions of bloodstream at bifurcation and in branch vessels are analysed in the main...