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Full-Text Articles in Engineering
Modeling And Simulation Of Urination Assist System Based On Working Medium Saturated Vapor Pressure, Li Xiao, Li Shu, Weihong Peng, Ting Guan
Modeling And Simulation Of Urination Assist System Based On Working Medium Saturated Vapor Pressure, Li Xiao, Li Shu, Weihong Peng, Ting Guan
Journal of System Simulation
Abstract: To design and analyze the urination assist system driven by ultrasonic-vaporized steam, a simulation model of the driving capsule and three mathematical models of working medium saturated vapor pressure, bladder pressure and urine flow are established. The simulation experiment system is built to verify the model. The effects of radiation time and sound intensity on the working medium temperature and driving pressure are simulated and analyzed. The results show that the working medium temperature and driving pressure are related to the radiation time and sound intensity. Prolonging radiation time and increasing sound intensity can increase the working medium …
Modeling And Simulation Of Urination Assist System Driven By Ultrasonic-Vaporized Steam, Li Xiao, Huaizhou Zhou, Zhichao Shi, Ting Guan, Yuansong Xiao
Modeling And Simulation Of Urination Assist System Driven By Ultrasonic-Vaporized Steam, Li Xiao, Huaizhou Zhou, Zhichao Shi, Ting Guan, Yuansong Xiao
Journal of System Simulation
Abstract: Aiming at the problem of assisting the neurogenic bladder micturating, a novel urination assist system driven by ultrasonic-vaporized steam was proposed. The mathematical model of the multi-field coupling relation between the external ultrasonic controlling parameters and the urine flow rate of urinary bladder was built using ultrasonics, thermodynamics and fluid mechanics theories. The simulation analysis of the influence of the controlling parameters on the urine flow rate performance of the system was conducted. The results show that the urine flow rate are mainly affected by the ultrasonic sound intensity, frequency, radiation area and time, as well as the system …
Mathematical Model Of Maneuvering Motion And Virtual Simulation For Ultra Large Twin-Propeller Twin-Rudder Ship, Guo Chen, Yan Lifei, Haiqing Shen
Mathematical Model Of Maneuvering Motion And Virtual Simulation For Ultra Large Twin-Propeller Twin-Rudder Ship, Guo Chen, Yan Lifei, Haiqing Shen
Journal of System Simulation
Abstract: A three-degree freedom mathematical model of maneuvering motion for an ultra-large type container ship with twin-propeller twin-rudder is established, with turning circle test and zig-zig test simulation results to verify it. By abstracting the ship maneuvering process, the three-dimensional model of ship, helm, propeller and rudder are modeled according to virtual reality technology, and then the ship posture and the dynamic process of ship maneuvering are displayed by the virtual scene and the responsive three-dimensional model. A virtual simulation system for the maneuvering of ultra large twin-propeller twin-rudder ship is established by the MFC framework and the …
Simulation Analysis Of Virtual Platform Of Close-Coupling Multiple Robots Combined Lifting System, Su Cheng, Yanlin Wang, Jitao Liu, Zhigang Zhao
Simulation Analysis Of Virtual Platform Of Close-Coupling Multiple Robots Combined Lifting System, Su Cheng, Yanlin Wang, Jitao Liu, Zhigang Zhao
Journal of System Simulation
Abstract: A framework of virtual simulation platform of close-coupling multiple robots combined lifting system was constructed. The model of the multiple robots system was established based on UG. The mathematical model of the mobile robot and the static equilibrium equation of the operated object was established. A collaborative control simulation system was set up based on ADAMS and MATLAB closed loop. In close-coupling multiple robots combined lifting system, according to two different trajectory planning, calculating draw of the mathematical model and the co-simulation model output curves were compared and analyzed to verify the correctness of the mathematical model of the …
Autonomous Flight Control And Simulation Study Of Independent Developed Soft-Wing Uav, Juntong Qi, Jinda Liu, Shang Hong, Liying Yang, Mei Sen, Jianda Han
Autonomous Flight Control And Simulation Study Of Independent Developed Soft-Wing Uav, Juntong Qi, Jinda Liu, Shang Hong, Liying Yang, Mei Sen, Jianda Han
Journal of System Simulation
Abstract: Soft-wing UAV is composed of ram air parafoil hanging powered vehicle with ropes. The special structure of soft-wing UAV makes it possess apparent mass, flexible structure and relative motions, which are the difficulties of modeling and controlling of soft-wing UAV. Autonomous flight controller design method based on mathematical model can low-costly and high-efficiently achieve control algorithms for UAV. Based on the physical parameters of the self-designed soft-wing UAV, a 6 DOF mathematical model was built. A flight controller and visual simulation system was designed. By using the trajectory points simulation, the numerical and visual simulation was synchronously realized which …
Research On Magnetic Device Model Of Nonlinear Inductance Combined With Transformer And Inductor, Hongzhu Li, Jiayue Sun, Qingjie Qi, Wang Qiao
Research On Magnetic Device Model Of Nonlinear Inductance Combined With Transformer And Inductor, Hongzhu Li, Jiayue Sun, Qingjie Qi, Wang Qiao
Journal of System Simulation
Abstract: A modeling method of magnetic device combining transformer and inductance was put forward. The modeling method reflects characteristics of magnetic and electric circuit simultaneously, and reflects parasitic parameters with capacitance. And the physical concepts of parameters are clear in the model. The interface model reflecting magnetic and electric circuit was established through ideal transformer based on electromagnetic theory, and nonlinear inductance simulation model reflecting hysteresis effect through derivation was obtained. The hysteresis loop of inductance actual simulation and that from magnetic core manual agreed well, proving the correctness and effectiveness. By modeling method in the proposed magnetic device, coupling …
Modeling And Simulation For Inter-Harmonics Of Double Pwm Ac Speed Control System For Port Bridge Crane, Wenhuan Yang, Dirui Yang, Ronggao Li
Modeling And Simulation For Inter-Harmonics Of Double Pwm Ac Speed Control System For Port Bridge Crane, Wenhuan Yang, Dirui Yang, Ronggao Li
Journal of System Simulation
Abstract: When the total capacity of double PWM reversible speed control system in distribution network accounts for a larger proportion of power grid capacity, the power quality pollution, or even voltage flicker is generated by interharmonics of double PWM system. Therefore the stable operation of the power grid is affected. Based on the studies on bridge crane system in Shanghai Deep water Port area, a mathematical model of multi-quadrant double PWM reversible speed control system was established. In accordance with the operating characteristics of motor, the inter-harmonic currents, injected into grid were simulated at different speeds respectively in the power …
Research On Numerical Simulation Of Continuous Roll Forming Process Of Four-Roll Plate Bending Machines, Wang Yan, Xinqing Zhu, Jiefei Hu, Ximin Cui
Research On Numerical Simulation Of Continuous Roll Forming Process Of Four-Roll Plate Bending Machines, Wang Yan, Xinqing Zhu, Jiefei Hu, Ximin Cui
Journal of System Simulation
Abstract: In order to improve the production process quality of four-roll plate bending machines, a four-roll bending mathematical model is established and a finite element simulation is used to verify its accuracy. The influence of side roller displacement, sheet thickness, and rotational speed on the radius and quality of the final shaped plate are analyzed. The simulation results show that as the displacement of side roll increases, the downtrend of the sheet forming radius gradually slows down and the quality of the formed sheet also decreases. Plastic strain fluctuation on plate surface decreases as the thickness increases, quality of thick …
Mathematical Modeling And Simulation Application Of Gshp Unit, Li Hui, Shaogang Yang, Fengying Liu
Mathematical Modeling And Simulation Application Of Gshp Unit, Li Hui, Shaogang Yang, Fengying Liu
Journal of System Simulation
Abstract: For the purpose of building a simulation platform of GSHP system, a semi empirical mathematical model of GSHP unit adopting multiple nonlinear regression method was established based on the mechanism knowledge and the sample data of GSHP unit. A GSHP unit module was developed, namely Type223, and its accuracy was verified by simulation analysis. A TRNSYS simulation platform of GSHP system was built by Type223 module. The operation characteristics of variable flow on ground source side of GSHP system was studied under variable frequency control. The results showed that, the energy consumption of GSHP unit is increased compared …
Simulation Of Transient Processes On Overvoltage In Electric Transmission Lines Using Atp-Emtp, Ahmet Nayi̇r
Simulation Of Transient Processes On Overvoltage In Electric Transmission Lines Using Atp-Emtp, Ahmet Nayi̇r
Turkish Journal of Electrical Engineering and Computer Sciences
In this paper, the mathematical modeling and simulation of electromagnetic transient processes is considered, which is of vital importance for examining the overvoltage phenomenon of power transmission systems. In the mathematical models of the AC power transmission systems that contain a power source, the power transformer, transmission line, and power autotransformer block are presented. The mathematical model of each system component is obtained based on the branch voltages, flux linkages, and branch voltages of the magnetic circuits individually. As for the simulation, an alternative transient program (ATP) environment is used to model the electric power system's elements. One of the …