Computer Simulation of Controlled Hydraulic Impactor System

2011 ◽  
Vol 179-180 ◽  
pp. 122-127 ◽  
Author(s):  
Guo Ping Yang ◽  
Jun Hao Gao ◽  
Bo Chen
Keyword(s):  
Mathematical Model ◽  
Simulation Environment ◽  
Opening Pressure ◽  
Impact Performance ◽  
Model And Simulation ◽  
Working Principle ◽  
Simulation Results ◽  
Working Performance ◽  
New Generation ◽  
Pilot Valve

In view of general impactor whose parameters can’t be adjusted continually in different conditions, a kind of controlled hydraulic impactor is introduced. Its non-linear mathematical model and simulation model are established. In simulation environment, adjusting opening pressure of pilot valve, supply oil volume and charging pressure of accumulator respectively, influences on the working performance are investigated. Simulation results prove that, working principle of controlled hydraulic impactor is available and its impact performance is superior to traditional impactor. This provides theory basis for innovation and production of a new generation impactor.

Design of 2_DOF Simulation Platform for the Testing of Airborne Laser Communication APT System

2014 ◽  
Vol 989-994 ◽  
pp. 3683-3688
Author(s):  
Li Xin Meng ◽  
Ding Xuan Zhao ◽  
Yang Yang Bai ◽  
Li Zhong Zhang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Closed Loop ◽  
Laser Communication ◽  
Motion Simulation ◽  
Vector Method ◽  
Kinematics Model ◽  
Airborne Laser ◽  
Model And Simulation ◽  
Simulation Results

Lightweight, flexible motion simulation is the demand of airborne laser communication optical transceive when apply to outside test. A new parallel 2_DOF platform that has the function of azimuth and pitching is put forword based on the analysis of airplane position-pose changes affect the performance airborne laster communication APT system, and the kinematics model is established by using closed-loop vector method. Kinematics model is right through the comparison of mathematical model and simulation results of ADAMS, which provides the reference and basis for the design of control system.

Research on Impact Mechanism of Hydraulic Rock Drill

2009 ◽  
Vol 16-19 ◽  
pp. 313-317
Author(s):  
Wen Yuan Tian ◽  
Ping Liu ◽  
Guang Qi Cai
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Impact Mechanism ◽  
Supply Pressure ◽  
Rock Drill ◽  
Hydraulic Impact ◽  
Working Principle ◽  
Working Performance ◽  
The Impact ◽  
Double Chamber

This paper introduces the working principle of the impact mechanism which is belonging to the double-chamber scavenge oil hydraulic rock drill. On the basis of some fundamental hypothesis, a mathematical model of hydraulic impact mechanism is established, then carrying out a dynamic simulation. Focusing on the influence of supply pressure, supply flow and precharge pressure on the working performance of impact mechanism, some research is implemented, and some regularity conclusions are obtained.

scholarly journals Performance analysis of a four-stroke compressed air engine

2020 ◽  
Vol 24 (1 Part A) ◽  
pp. 113-126
Author(s):  
Fancong Zeng ◽  
Jinli Xu
Keyword(s):  
Mathematical Model ◽  
Experimental System ◽  
Compressed Air ◽  
Work Efficiency ◽  
Supply Pressure ◽  
Numerical Studies ◽  
Optimizing Design ◽  
Working Principle ◽  
Working Performance ◽  
Set Up

The purpose of this paper is to investigate working performance for a four-stroke compressed air engine via numerical studies. A mathematical model is developed to study the influence of several operative parameters on working performance. The mathematical model consists of thermodynamic model, each stroke model and dynamic model. In addition, a working principle and an experimental system of the compressed air engine are set up. The aims are: to introduce the novel four-stroke engine and to quantify the influence of rotational speed, supply pressure and supply temperature on working characteristics. The simulation and analysis show several meaningful results. The compressed air engine has higher cylinder pressure and work efficiency in lower speed stage, and the increase of the supply pressure can effectively improve indicated work and work efficiency. However, supply temperature has little effect on the performance of the compressed air engine. Therefore, the study of this work will provide a certain guidance function for further study on optimizing design of the compressed air engine.

Analysis of Self-Balance Characteristics of OPOC Engine

2011 ◽  
Vol 211-212 ◽  
pp. 93-96 ◽  
Author(s):  
Ping Huo ◽  
Jian Ping Wang ◽  
Qiu Yan Sun
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Simulation Study ◽  
Lateral Pressure ◽  
Inertial Force ◽  
Adams Software ◽  
Working Principle ◽  
Simulation Results ◽  
Noise Vibration ◽  
Stroke Engine

Considering the structure feature and working principle of Opposed Piston Opposed Cylinder engine, mathematical model of kinematics relationship for internal-external piston is build. Using ADAMS software to process kinematics characteristics simulation study and comparing the simulation results with traditional diesel engine, it indicate that the OPOC two-stroke engine has better self-balancing character, less kinematics inertial force and cylinder lateral pressure, and is helpful in reducing the frictional power consumption, and improving the noise-vibration smoothness.

Four Order ESD Generator Circuit Model and its Simulation

2012 ◽  
Vol 239-240 ◽  
pp. 264-269 ◽  
Author(s):  
Jin Shan Wang ◽  
Ke Wang ◽  
Xiao Dong Wang
Keyword(s):  
Mathematical Model ◽  
Circuit Model ◽  
Model Construction ◽  
Generator Circuit ◽  
Model And Simulation ◽  
Simulation Results ◽  
Testing Standards ◽  
The Mathematical Model

Basis international electrician committee issued IEC61000-4-2 testing standards, proposed a new ESD current expression. Using Laplasse transform, established the ESD system mathematical model, according to the mathematical model, construction of passive four order ESD system circuit model and active four order ESD system circuit model, and simulation. The simulation results meet the IEC61000-4-2 standard, and verify the ESD current expression, the mathematical model and the circuit model of consistency.

Model and Simulation for Driving System of Four-Wheel-Drive Electric Vehicle

2013 ◽  
Vol 336-338 ◽  
pp. 480-483
Author(s):  
Guo Kai Xu ◽  
Tao Zhang ◽  
Xiu Chun Zhao ◽  
Juan Wang
Keyword(s):  
Mathematical Model ◽  
Electric Vehicle ◽  
Pi Control ◽  
Driving System ◽  
Model And Simulation ◽  
Wheel Drive ◽  
Simulation Results ◽  
Four Wheel Drive ◽  
The Mathematical Model ◽  
Vehicle Movement

Model for drive system of four-wheel-drive electric vehicle was investigated. By combing the balance equation for the vehicle movement with the equation of motor mechanical properties, a mathematical model of driving system of electric vehicle was established, PI control strategy was used for the optimal control and the model was simulated by the software Matlab/Simulink. The simulation results show that the mathematical model of driving system of the electric vehicle can represent the vehicle running states accurately.

Design and research of signal-level airborne electronic reconnaissance simulation system

2018 ◽  
Vol 09 (04) ◽  
pp. 1850030 ◽  
Author(s):  
Yang Zhao ◽  
Chaoxuan Shang ◽  
Zhuangzhi Han
Keyword(s):  
Mathematical Model ◽  
Euclidean Distance ◽  
Simulation System ◽  
Test Results ◽  
Simulation Test ◽  
New Thought ◽  
Model And Simulation ◽  
Electronic Countermeasure ◽  
Simulation Results ◽  
Good For

Airborne passive electronic reconnaissance equipment has developed rapidly during recent years. However, because of its expensive and unavailable military features, the simulation realization of these equipment needs to be solved. And the smaller the simulation particle is, the better the simulation system will be. In this study, a signal-level airborne electronic reconnaissance simulation system was built. Mathematical model and simulation realization of each part are introduced in this study. Focusing on the shortness of traditional signal sorting methods, we creatively proposed a presorting method based on the Euclidean distance inside signal flows. Simulation results show that the presorting method based on Euclidean distance successfully reduced the pressure on main sorting and appeared good for signal sorting. Simulation test results of each model built in this study are also shown in the study. This study provides a new thought on the realization of airborne electronic reconnaissance equipment and benefits the development of electronic countermeasure.

Variable-Frequency Pump Controlled Piston System for Box Jacking

2013 ◽  
Vol 365-366 ◽  
pp. 959-962
Author(s):  
Liu Ping Pan ◽  
Zhi Nan Mi
Keyword(s):  
Mathematical Model ◽  
Digital Simulation ◽  
Variable Frequency ◽  
Good Characteristic ◽  
Piston System ◽  
Box Jacking ◽  
New Type ◽  
Working Principle ◽  
Simulation Results ◽  
Rotary Speed

In Shanghai Beihong Vehicular Undercrossing Tunnel project, a new type of hydraulic speed-regulating system, which is variable-frequency pump controlled piston system, was used. It uses variable-frequency technology to adjust rotary speed of driving motor. It can fulfill stepless speed-regulating and has good characteristic of power adaptation and energy-saving. The composition of system and working principle are stated, and mathematical model is derived. Digital simulation results show that the system has good controllability.

A Study of a Miniature Modularized Electro-Hydraulic High-Frequency Flutter

2012 ◽  
Vol 201-202 ◽  
pp. 360-363
Author(s):  
Tong Xing ◽  
Liang Fu
Keyword(s):  
Mathematical Model ◽  
Resonant Frequency ◽  
High Frequency ◽  
Maximum Value ◽  
Large Force ◽  
Working Principle ◽  
Simulation Results ◽  
The Mathematical Model

In order to solve the problem that traditional flutters can’t reach the requirements of vibration-assisted machining (VAM), a miniature modularized electro-hydraulic high-frequency flutter was proposed, which can output large force in high frequency. The structure and working principle of the flutter were elaborated in this paper. The equations of the valve in this flutter can be obtained based on equations of tradition valves, which established the mathematical model of the flutter. The flutter output waveforms were analysed by MATLAB in different input frequencies. The simulation results show that the flutter amplitude reach the maximum value in resonant frequency.

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