Applied Mechanics and Materials Vol. 192

Abstract: In order to reduce the influence of the bench extraction equipment from the working deep-water exploration ship when it has swing or heave movement by wind and waves, according to the work condition and the structural parameters of 3000m deep-water exploration ship, Pump-controlled type and valve-controlled type hydraulic transmission system for waves compensation of deep-water exploration ship bench extraction equipment was researched through analysing and calculating. Wire rope which drags the bench is maintained appropriate tensioning status using this wave compensation system, when bench downs to the bottom of the sea. This system can bind and release wire rope to compensate for heave motion automatically, in order to keep the stability and security of the deep-water exploration ship before bench loading the bottom. Dynamic performance of wave compensation system is improved through controlling supplementation pressure and the accumulator parameters precisely.

Abstract: This paper, in perspective of biomechanics, analyzes tug-of-war, on condition of maximum friction and stable rope, and achieves the sequence which can exert maximum energy. The key to exert maximum energy is to achieve maximum friction. Firstly, build an ideal and simple model, with mechanical analysis, and get that point. Secondly, analyze the maximum pressure and conduct force analysis of rope, with a conclusion that if the sequence is arrayed from short to tall and only when the heights are the same, the athletes with greater weight should stand behind.

Abstract: The volume of workspace is one of the most important parameters to evaluate the flexibility of a robot. Monte Carlo Method and adaptive-divided mesh method were applied to analyze the workspace of the manipulator of a explosive-handling robot in mine. Firstly, the kinematical model of the manipulator was taken forward based on its main structure. Then, its kinematics analysis was given. Based on them, the manipulator’s workspace was analyzed by Monte Carlo Method and the cloud picture was completed. At last, the ‘Adaptive-divided Mesh Method’ was brought forward and the volume of the workspace was calculated with it. The result shows that the workspace’s volume is large enough and the working points in the workspace of the explosive-handling manipulator were distributed compactly and uniformly, which can satisfy the requirements with high efficiency.

Abstract: According to the requirement of independent voltage monitoring of thermoelectric modules used in Automobile Exhaust Thermoelectric Generator(AETEG) designed by our group, a kind of voltage monitoring system based on master-slave architecture that includes several slave detecting boards and a master detecting board was designed in this paper, the hardware schematic and software flow diagram were provided, the amplifier circuit that could detect negative voltage of thermoelectric modules was designed, and the PC based monitoring interface using VC++ language was developed as well. The practical application results validate that the system designed is sophisticated and steady, it meets the real time voltage monitoring demand of thermoelectric modules and provides convenience for their optimization of electric topology structure in future.

Abstract: Based on formulating the minicar transmission efficiency test standard,the test was designed by using dimensional analysis theory. Selected the power loss of transmission system as evaluation index, the effects of parameters such as oil temperature,oil depth of stir oil gear, line speed of stir oil gear, transmission system ratio, input speed and input torque were experimented. It has the advantages of less test times and more design freedom. The test design provides theory basis for the empirical formula which indicates the relationship between power loss and test parameters.

Abstract: A hardware-in-loop simulation system via line of sight angle for MMW guidance and relative simulation method are presented. The simulation system is made up of a small quantity of hardware and is proved to be feasible by analyzing its system error theoretically. The effectiveness of the simulation system and method presented are tested by several experiments and the experiment results are proved to be authentic.

Abstract: In a rotor system, simultaneous existence of coupled faults, i.e. a crack couples with a misalignment, is very common. However, the single fault diagnosis has been investigated extensively in previous work while the issue of coupled faults diagnosis (i.e. considering two or more than two faults at a time) has been addressed insufficiently. In order to detect the existence of coupled faults and to prevent a fatigue crack in the rotor shaft, a new method is proposed to analyze the vibration signals using the Wavelet de-nosing and kernel principal component analysis (KPCA) in this work. The Wavelet was firstly used to de-noise the original vibration signals, and then the KPCA was adopted to extract useful fault features for the coupled faults detection. A case study on the coupled fault diagnosis of the rotor system has been implemented. The diagnosis results demonstrate that the proposed method is feasible for the coupled fault diagnosis of rotor systems. The fault detection rate is 91.0%.

Abstract: A new type of diffluence T-junction with low-resistance was designed to reduce the flow resistance coefficient. After the numerical simulation on internal flow field for both the traditional and newly-invent T-junction, an analysis was made on their flow pattern, and their fluid resistance coefficient was computed. At last, the actual fluid resistance was measured respectively. It shows that: the results from numerical simulation agree well to those got in experimental testing. Furthermore, the flow resistance coefficient of T-junction is decreased from 1.13 to 0.61 after redesign, which indicates high effectiveness of this process. The mechanism is that smoothness for branch can inhibit the vortex generation efficiently and greatly reduce its flow resistance coefficient, which consequently reduces the gross flow resistance

Abstract: This paper discusses the development and application of an integrated multi -functional onboard charger for electric vehicle, and introduces its main circuit structure, operating principle and the main characteristics. The product design is verified and optimized with computer simulation technology. Finally prototype functional and performance test are carried out. The results show that the charger operates efficiently and stably, and suitable for onboard operation.

Abstract: Removed due to plagiarism. The original paper was published by IEEE "The Metrication of Low Probability of Intercept Waveforms”, C. Fancey & C.M. Alabaster, Proc. IEEE 5th International Conference on Waveform Diversity & Design, Niagara Falls, ON, Canada, 8th – 13th August 2010.http://ieeexplore.ieee.org/xpl/login.jsptp=&arnumber=5592358&url=http%3A%2F%2Fieeexplore.ieee.org%2Fstamp%2Fstamp.jsp%3Ftp%3D%26arnumber%3D5592358