This paper presents a composite 6UPS-6SPS parallel mechanism (PM) based on the Stewart platform for the multidimensional loading test toward the thrust bearing (TB). Analysis such as on the degree of freedom (DoF), kinematic, statics and Jacobian matrix is carried out. Meanwhile, a composite continuous...

Processing the wound bullet's cavity image has an important value on studying the temporary cavity's formation, evolution and quantitative evaluation of its size. But it is difficult to assure the quality of the image, so the boundary can not be distinguished. This paper proposes a hybrid filter method...

In practice, one can get luminous flux parameter of LED by off-line measurement method and make prediction of the LED module's service life time. But the prediction results only focus on LED luminous flux, meanwhile colorimetric and thermal characteristics are not involved. Towards to the disadvantage...

Pathologic sampling is the initial stage of the pathological research and forensic identification, if the thickness of samplings can not meet the requirements, observation results will be affected, resulting in a higher rate of misdiagnosis. This paper aims at studying the biomechanical properties of...

Impedance matching balance transformer is often used as the main electrified railway traction substation transformer. In order to solve the problem that traditional fault diagnosis method could not accurately identify the internal or external failure, it is proposed an identification algorithm of recursive...

In this paper the effect of concrete aging on contact force and contact time during the impact of steel ball upon a concrete beam has been investigated. Three concrete beams were tested at the ages of 7, 14, 28, 56, 91 and 182 days. It was found that contact force increases with concrete age, whereas...

This paper presents a comparison of several currently used prediction models for creep and shrinkage of concrete. Compared models were: EN 1992-1-1 (2004), RILEM Model B3 (1995), MC 2010, GL Model 2000, ACI 209R (1992), AS 3600 (1988) and BS 8110 (1985). The comparison was made on slabs with two different...

This researche examines flexural behavior of I-shaped pillars in noise barriers made of prestressed concrete and prestressed steel fiber reinforced concrete under loading corresponding to their actual loading - effect of wind on the panels. Three specimens of I-pillars were tested in laboratory and calculated...

A connecting rod ,which a part connecting the crankshaft to piston of compressors, does linear reciprocating motion along the center of a piston inside of the cylinder, ensuring that the connecting rod qualifies the periodical changing of load and the fatigue strength and structural stiffness with better...

Numerical simulation method based on CFD simulation soft, Launched a T-slots dry gas seal structure optimization. In the case of only changing the Circumferential ratio of T-slot structure of initial improvements, further optimized on the basis of the initial improvements, conclusion that lug boss groove...

R&D of the DL05 cable steel are briefly introduced, then, the influence of element Mn and S on the electrical conductivity of DL05 cable steel are presented in details. some Key thermal properties and controlled manganese-sulphurratio in steel of the DL05 cable steel have been researched by using the...

In consideration of the disadvantages of the traditional contact-type measure methods for deformation measurement in large section roadway, the in-situ measure method and tool is developed with the theory of laser-based distance measuring. The novel multi degree of bracket set makes a stable connection...

Putting forward a cam mechanism, which realize torsion moment transfer. Firstly, establishing the mechanical model of the mechanism. According to the principle of geometry, the corresponding mathematical model is established, which based on the analysis of the mechanical model. Through analysis of mathematical...

In view of the existing problems in the coal sample collection method of the coal seam gas content, a sampling method of fast sealing and sampling in coal seam drilling is proposed and the method's control signal can achieve the non-contact transmission by electromagnetic induction principle. The equivalent...

The choice of gas mediums will affect the reflected shock pressure and temperature during analyzing the shock tube. Different mediums in driver and driven section result in the Mach number disparity in the process of shock wave propagating, adversely affecting the reflected shock wave. Based on the ideal...

This article suggests an approach to automation of spacecraft onboard equipment testing, basing on a formalized sequence of scenarios determining measuring and control actions. We have developed a technology allowing to automate all stages of testing of spacecraft onboard systems' functional characteristics...

The power supply based on current transformer (CT) is a good method to provide energy for online monitoring devices. In order to study the power output characteristics of CT power supply, a simulation model is built under Saber software. Find that the output power of CT first increases and then decreases...