Papers by Keyword: Simulation Analysis

Abstract: By establishing bus simplify coordinate system model and equivalent mechanical model, inertial forces and external forces are analyzed through vehicle lateral movement and vehicle's yaw motion and roll motion. Three degrees of freedom linear motion equation of vehicle is established taking into account lateral motion, yawing movement and rolling motion of vehicle and it can be solved by using method of state space equation. Vehicle dynamic characteristics are analyzed by using this method and programming with Matlab. Vehicle in steering wheel angle step response is analyzed under the conditions of different tire wheel cornering stiffness, moment of inertia, height of center of mass. The results show that increasing rear wheel cornering stiffness, reducing front wheel cornering stiffness and center of mass height, which can effectively improve stability of vehicle. Simulation results provide a theoretical basis and reference for the selection and design of vehicle.

Abstract: This article designed a kind of magnetorheological high-speed on-off valves and made optimized design based on the nature of the magnetorheological fluid(MRF). ANSYS software was used to analyze magnetic field of the two different structures and get the magnetic flux lines distribution and flux density map. The simulation analysis results show that: optimized high speed switching valve, can reduce the loss of the coil and the rise of temperature, improves the life of the valve body, it also can shorten the switching response time and improves the reliability of the valve.

Abstract: Gas insulated switchgear (GIS) has been widely used in global power grids currently. However, there are several disadvantages of GIS which will cause partial discharge (PD) in the insulation and then make GIS shut down. In this paper, the application of the ultra high frequency (UHF)method for partial discharge monitoring is discussed in detail, including the placement of the UHF sensors , detection system and the different characteristics of the different defects in the PD signals diagram are analyzed as well. Finally, some relevant conclusions are drawn based on Finite-Diffrenee Time-Domain algorithm (FDTD) for simulation of the electromagnetic waves by UHF PD detection technology.

Abstract: In this paper, a kind of pressure-flow compound fault-tolerant control module based on Knowledge Modules of Hydraulic Fault (KMHF) is designed rationally. The simulation analysis of the pressure-flow perceptible control module based on KMHF has been made and the fault-tolerant properties of the pressure-flow perceptible control module have been studied. By analyzing the simulation results, it turns out that the pressure-flow compound control module based on KMHF as a new hydraulic fault-tolerant technology present in this paper can improve the reliability and safety of practical hydraulic system and has important application value.

Abstract: This paper adopts finite element method to carry out simulation analysis for Enzitan reinforced concrete U-shaped aqueduct. Deducing variation law of the aqueducts stress and displacement in construction process and operational process, researching the rationality of aqueduct structure design scheme. Analysis results show that, Enzitan reinforced concrete aqueduct structure is reasonable, force of aqueduct structure is explicit, it meets the requirements for design.

Abstract: This paper adopts universal finite element calculation software to carry out force analysis for Meiliao trench-buried inverted siphon,computer is applied in analysis of trench-buried inverted siphon. Deducing variation law of the inverted siphons stress and displacement in construction process and operational process. The calculation results further shown design schemes rationality and safety. Analysis results show that, force of Meiliao trench-buried inverted siphon structure is explicit, it meets the requirements for design.

Abstract: Aqueduct is a important water conveyance buildings, this paper adopts finite element method to carry out three-dimensional finite element simulation analysis for Songxijiang reinforced concrete rectangle beam-supported aqueduct. Researching variation law of the aqueducts stress and displacement in construction process and operational process. Analysis results show that, structure of Songxijiang reinforced concrete rectangle beam-supported aqueduct is reasonable, force of aqueduct structure is explicit, it meets the requirements for engineering.

Abstract: The thrust rod is the key load-bearing part of the balanced suspension on heavy commercial vehicle. In order to optimize the structure and study the durability of it, we carried out the force and simulation analysis. In this paper, the model of thrust rod and guide mechanism was simplified. Under all driving conditions, force analysis was done for fully-loaded vehicle and force calculation formulae of thrust rods in different directions were derived. Multi-body dynamics model of the vehicle was established with ADAMS and we compared the differences of the two algorithms. Then the results of the two algorithms were compared with the load spectrum test results. We find the calculated results are in good agreement with engineering requirements.

Abstract: When the Distributed Generation (DG) access to the distribution network, it will have great impact on the distribution network. In order to reduce the impact, through the research of distribution network accessed with DG, I summarize a set of feasible operation scheme, which can improve the security and economy of distribution network. In this paper, IEEE33 notes distribution network is used as an example. I build the model of distribution network with SIMULINK. By changing the capacity and location, I study the impacts on voltage of distribution network. On the basis of a large number of simulation examples and experimental data, I summarize several principles we should comply with.

Abstract: Relative to the passive suspension, automotive active suspension car driving more ride comfort and stability, has a vital role to further improve the performance of the vehicle. For such a typically complex active suspension system research, the key issue is the selection of control strategies. The problems in the currently active suspension control strategy, the principle of a simple, effective, this paper, a single neuron PID control strategy used in the automotive active suspension system. The results show that compared with other control strategies, single neuron PID control strategy is reliable, has more advantages.