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Among the family of polarization sensitive arrays, we can find the so-called cocentered orthogonal loop and dipole uniform linear array (COLD-ULA). The COLD-ULA exhibits some interesting properties, e.g., the insensibility of the polarization vector with respect to the source localization in the plan of the array. In this correspondence, we derive the statistical resolution limit (SRL) characterizing...
This paper proposes an adaptation control method of the PDAC constants that facilitates stabilization. Previously, we proposed a three-dimensional biped walking control based on Passive Dynamic Autonomous Control (PDAC). The robot dynamics is modeled as a two-dimensional autonomous system of a three-dimensional inverted pendulum by applying the PDAC concept. In addition, the convergent controller...
An extended car-following model is proposed by incorporating the anticipative information by vehicle to vehicle. The stability condition of the proposed model is obtained by using the linear stability theory. The results show that the anticipative information can promote the stability of traffic flow. Numerical simulations are carried out, and the results are consonant with the theory ones.
The structure was introduced, status of parallel-type Electrostatic Fabric Filter were researched, and the factors influencing collection efficiency were analyzed in the paper. With software of Gambit which also meshed the calculating region, Three-dimensional structure model of the precipitator was established. And then the numerical simulation of the air distribution characteristic was carried on...
Aiming at the problem that it is difficult to confirm the parameters of the PID controller and the parameters can not be changed once identified, an intelligent PID control method is proposed. According to the size of the system error, this algorithm controls the system with different subsections of different parameters, by using the particle swarm optimization (PSO) to optimize the parameters of...
Taking a gas-assisted injection-moulded semicircular reinforced structure part as the object of study, A numerical simulation was carried out for the reinforced structure part using MPI/3D GAS in Moldflow 6.1 software.The manipulation procedures of gas-assisted molding simulation in Moldflow software were given. 6 technical parameters in gas-assisted injection molding was investigated with the methods...
Plastic profiles produced by extrusion die are cooled down and calibrated by calibrators, so it is very important to properly design the cooling system in calibrator for the profile quality. Based on the finite element method (FEM) and the finite difference method (FDM), the numerical simulation of the cooling process is realized for plastic profile within calibrator. The simultaneous shape and topology...
In this paper, we proposed a new car following model based on the Full Velocity Difference (FVD) model, with the acceleration of the front car considered. Compared with the FVD model, the improved model can simulate the motions of cars starting from a traffic signal more nature. Numerical simulation results show that the stability of the improved model is better than the FVD model, with appropriate...
Fluid-structure interaction analysis in Internal Carotid Artery(ICA) are carried out as preparation for validation between the result of numerical simulation and photoelastic stress analysis. In this work, we assume blood vessel as an isotropic elastic medium and the wall's Poisson ratio is 0.45 and Young's modulus is 3.0Mpa. Our study shows various parameter on fluid dynamics of blood flow, such...
Design of underground heat exchanger is crucial to application of ground source heat pump system. This paper presents the method and self-developed program for designing vertical U-pipe underground heat exchanger using numerical simulation. The program's accuracy was validated by comparison of outlet temperature between field test and simulation: the biases are not more than 1 centi-degree in most...
3D model was established by analyzing the flow of ceramic paste in the screw channel. Set the boundary conditions on the premises of "only the barrel rotating", "only the screw rotating", "only the flight rotating" and "the screw root and flight rotating together" respectively, numerically simulated the paste flow with finite element analysis software ANSYS,...
In this paper, the numerical simulation and experimental study are both used to solve the issue about the A2/O activated sludge process of one wastewater treatment plant. By the application of the standard model and moving-mesh method of the FLUENT, the velocity maps were got finally. The optimum scheme was found by the comparison of the maps in different scheme. The experimental model was set on...
Considering interaction of tunnel-soil-building, the masonry structure building with strip foundation crossed by shield tunnel in 45 degree was simulated by 3D FEM MIDAS/GTS software. The settlement and strain of building was analyzed. The results show that: the building was slightly uplifted first, and then followed by rapid settlement during shield tunnel excavating. Uneven settlement was still...
The multi-scale laser scanning technology is used to obtain the Three-dimensional (3D) data of a large pump. This technology is more accurate and faster than the traditional measurement methods when obtaining the data of complex shape entities. The data obtained from multi-scale laser scanning technology can be used in reverse engineering CAD modeling of pump. They can also be used to get the model...
A new cross flow solid-liquid separate equipment with high efficiency has been proposed, and comparative experiment investigations between the municipal sewage plant and the test device of the separator and the numerical simulation of the device flow field using FLUENT CFD software have been combined to define its basic operating parameters and precipitation characteristics, and has laid the foundation...
High Temperature Air Combustion is an advanced technology to realize the largest waste heat recovery and extremely low NO emission. Numerical simulation of High Temperature Air Combustion of natural gas was performed for furnace with a swirling burner. The results showed NO emission was much lower when a swirling burner was used. Results demonstrated that swirling burner could enhance the flue gas...
In order to study the seismic responses of saturated sand, a group of centrifuge-shaking table tests on saturated medium dense sand and dense sand are conducted at the institute of technology, SHIMIZU Corporation in Japan. Then finite difference software FLAC/FLAC3D is used to calibrate the experimental results. Ideal elastic-plastic model, Mohr-Coulomb's criterion and Finn's pore pressure generation...
The principal factors affecting the warpage of long-armed product during plastic injection process were discussed. Using injection process numerical simulation and design expertise, this paper studied the approach to decrease warpage degree with multi-gates injection. Taken one straight long-armed part as sample, the potential warpage caused by uneven cooling and non-uniform shrinkage with two or...
Considering effects air turbulent and other chemical reactions in blast furnace (BF) raceway, the raceway turbulent mathematical model was built. CFX software has been applied to complete the numerical simulation of the mathematical model and to analyze the physical and chemistry states in a visualization way. The maximum concentration of CO is about 27.4% under the condition of 1000 coke particles...
Blasting action plays a very important role in slope stability and the effect of rock fragmentation in stonework cutting excavation. Based on engineering practices, this paper applies dynamic finite element method and conducts a numerical simulation of the cutting excavation process. It have conducted researches on the stress field inside rocks in millisecond delay blasting, Von-Mises and other domino...
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