Papers by Keyword: Simulation

Abstract: In this paper ,a main circuit mathematical model of Advanced Static Var Generator (ASVG) is established. a direct current control method for SVG is put forward based on d-q transformation, this method is also analyzed from theory and made simulation model, the simulation results show that this control method is reasonable and effective.

Abstract: This paper is to use a fast and useful simulation method to verify the acoustics performance of the exhaust muffler which was designed, and find a better muffler. Based on analyzing the spectral of diesel engine exhaust noise and the muffler theory, and designed two different type of muffler. Got the transmission loss of muffler by using software. Finally, compared the two projects’ transmission loss and got the better effect.

Abstract: With the circuit fabrication technology continues toward high-speed, high-density, low-power direction, modern circuit design techniques have changed radically. The speed improvement of digital system means rise and fall time of signals as short as possible, the improvement of frequency and edge rates will bring a series of high-speed design problems, these problems bring great challenges to the system hardware design, the correct design from logical point of view, if there is improper in the actual PCB design will lead to failure of the entire design. EMI radiation of PCB is analyzed, EMC simulation of PCB and optimizing improved are finished. The PCB electromagnetic compatibility is analyzed by using Protel 99SE and Ansoft Designer 2.2 software, and simulation result indicates optimizing design is correct and effective.

Abstract: This paper deals with the problem of braking process modeling. A subway train braking process simulation software is built, which composes of a GUI and a underlying model. The underlying model consists of a train model and a brake system model. The train model is simplified and built by assembling subcomponent element models of a railway vehicle. The brake system model is simplified and built based on experimental data in order to reduce computational effort. The GUI of the software can be use to input model parameters, display simulation results, and store simulation data. As a result of the simplifications of the modeling process, the developed software can perform real time simulation.

Abstract: Wire of the brake pedal is not directly connected to the hydraulic environment in the braking By-wire system so the driver has no direct pedal feel. Then pedal simulator is an important part in the brake-by-wire system. A pedal force simulator was designed based on the traditional brake pedal curve of pedal force and pedal travel, AMESim and Matlab / Simulink were used as a platform to build simulation models and control algorithms. The simulation results show that the pedal stroke simulator and the control strategy meet the performance requirements of traditional braking system. It can be used in brake by wire system.

Abstract: According to the characteristics of marine operation, this article designs a simulation method of marine operation resources scheduling, and improves multi-dimensional dynamic list scheduling algorithm to make it applicable to the marine resources scheduling of unit level. Simulation results are obtained through a simulation based on an anti-submarine mission. Finally analysis on the existing problem of the simulation framework combined with the actual situation is enumerated, and further study direction is put forward.

Abstract: This paper derives a RLS of calculation formula and proposes the use of RLS to identify the parameters of design and simulation methods based on Altera DSP Builder, with the widely using of the least-squares algorithm in real-time control and line identification. According to a given example, the simulation results and analysis are analyzed. The simulation results show that the method this paper proposed have such advantages and application value that simplify the design difficulty and improve design speed, simplicity and flexibility of simulation and other aspects.

Abstract: This paper analysed the deficiency of Petri net model of traditional stochastic manufacturing unit, and proposed an improved Petri net model to deal with the situation. It simulated improved Petri net models of different stochastic manufacturing units directly and conducted performance analyses. Moreover, it verified the capability of improved Petri net to depict stochastic manufacturing units accurately by comparing with the calculation results of Markov chain based on the same structure. The methodology of performance analysis based on simulation is universal significance.

Abstract: In this paper, the anti-bending function of the concrete beam is simulated by using ANSYS software. The simulated quantity include crack loads, yield load, ultimate load, deflection, crack and crush, stress distribution, strain distribution, movement of neutral axis and so on. The simulated model is a actual structure test. As a result, the value of the yield load, the ultimate load, the deflection are consisted with the actual loads .The method may be used on simulation of structure tests, or used in teaching of some colleges.

Abstract: The calculated result of the mathematical model based on the conventional transfer function has bigger deviation than the measured. In this paper the mathematical model of the work roll bending is derived. The modeling is different from conventional modeling used many presumptions and linear processing. The modeling calculated accurately the equivalent load spring using the method of influence function. The simulation results agree well with actual data of the bending system.