Dynamic Modeling and Mobility Analysis of the 3-R(RRR)R+R Antenna Mechanism

Robotica ◽  
2021 ◽  
pp. 1-19
Author(s):  
Guoxing Zhang ◽  
Donghao Zheng ◽  
Jinwei Guo ◽  
Yulei Hou ◽  
Daxing Zeng
Keyword(s):  
Mathematical Model ◽  
Dynamic Model ◽  
Dynamic Simulation ◽  
Dynamic Modeling ◽  
Theoretical Basis ◽  
Research Work ◽  
Experimental Results ◽  
Mobility Analysis ◽  
Motion Characteristics ◽  
Mathematical Model Analysis

SUMMARY A novel 3-R(RRR)R+R (R as revolute joint) hybrid antenna mechanism (HAM) is proposed for noncircular polarized antenna. First, its mobility characteristic is analyzed. Besides, its kinematics is deduced, and the velocity and acceleration are obtained. Afterward, its dynamic model is established. The actuation torques of each actuation joint are obtained. Its actuation torques are verified by mathematical model analysis and dynamic simulation. Furthermore, its workspace is also presented. Finally, the motion characteristics experimental results show that the 3-R(RRR)R+R HAM can carry out the azimuth and pitch motion. This research work serves as a fundamental theoretical basis for its further application.

Dynamic Modeling and Simulation of Stratospheric Airships

2012 ◽  
Vol 457-458 ◽  
pp. 237-244
Author(s):  
Guo Chang Hu ◽  
Mei Ping Wu
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Theoretical Basis ◽  
Simulation Method ◽  
Autonomous Control ◽  
Overall Design ◽  
Stratospheric Airship ◽  
Simulation Results ◽  
Motion Characteristics

Aiming at the requirements of autonomous control for stratospheric airships, based on description of the modeling plant and forces analysis in detail, the dynamic model is established by Newton Method. The motion characteristics of airships under control action are analyzed using simulation method. Simulation results indicate the correctness of dynamic model, and can make itself a theoretical basis for the overall design of the stratospheric airship.

Dynamic Simulation of Large Flow Solenoid Valve

2016 ◽  
Author(s):  
Z. Liu ◽  
X. Han ◽  
Y. F. Liu
Keyword(s):  
Dynamic Model ◽  
Dynamic Simulation ◽  
Dynamic Characteristics ◽  
Nonlinear Dynamic ◽  
Structural Parameters ◽  
Solenoid Valve ◽  
Simulation Software ◽  
Experimental Results ◽  
Nonlinear Dynamic Model ◽  
Large Flow

A nonlinear dynamic model of a large flow solenoid is presented with the multi-physics dynamic simulation software called SimulationX. Validation is performed by comparing the experimental results with the simulated ones. The dynamic characteristics of the large flow solenoid valve are analyzed. Different structural parameters are modified in this research and the diameter of the orifice is proved to be one of the most important parameters which influences the pressure response most.

Dynamic Modeling of an Overhead Valve Engine CAM-Follower System Using a Resistive Companion Dynamic Simulation Solver

2005 ◽  
Author(s):  
Daniel C. Sloope ◽  
David N. Rocheleau
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Dynamic Modeling ◽  
Valve Train ◽  
Test Bed ◽  
Virtual Test ◽  
Virtual Test Bed ◽  
Cam Follower ◽  
Valve Engine ◽  
The Mathematical Model

A computer simulation model of the valve train of a Honda GX30 engine was modeled using Virtual Test Bed (VTB), a resistive companion dynamic simulation solver. Traditionally VTB has been exclusive to solving electrical system models but using the resistive companion equivalence of through and across variables, it can be applied to mechanical systems. This paper describes a dynamic simulation of an overhead valve engine cam-follower system using the VTB software application. The model was created to show valve train position, velocity and acceleration to aid in development of a camless engine being developed at the University of South Carolina. The mathematical model was created using governing dynamic equations. Using C++ programming, the mathematical model was transformed into a Virtual Test Bed model. The VTB model successfully shows valve train component position, velocity and acceleration. The significance of this work is its novelty in using the Virtual Test Bed environment to handle dynamic modeling of mechanical systems, whereas to date, VTB has been primarily focused on resistive companion modeling of power electronic systems. This work provides the foundation for using VTB to tackle more complex mechanical models.

Research and Design of Pneumatic AMT Actuator

2011 ◽  
Vol 52-54 ◽  
pp. 318-323
Author(s):  
Jian Zhong Wang ◽  
Liang Chu ◽  
Xin Tian Lu
Keyword(s):  
Mathematical Model ◽  
Dynamic Model ◽  
Theoretical Basis ◽  
Structure Characteristics ◽  
Design Scheme ◽  
Heavy Truck ◽  
The Mathematical Model ◽  
Research And Design

According to the design requests of certain heavy truck, this paper introduces a design scheme of pneumatic AMT automatic shift system, which focuses on the structure characteristics and working principles of the three-position cylinder controlled by two solenoid valves. And the mathematical model of the three-position cylinder controlled by two solenoid valves is established based on pneumatic principle. The dynamic model of this mechanism was built by AMEsim software. The variety of pressure and stroke of intake/exhaust chamber was simulated under different air pressures. The theoretical basis is provided to design the AMT election-shift actuator.

Transient Performance Simulation of Single-Cylinder Engines Based on Tribology Behaviors

2010 ◽  
Vol 34-35 ◽  
pp. 946-950
Author(s):  
Jian Zhao ◽  
Bin Tang ◽  
Yun Bang Tang ◽  
Kun Peng Qi ◽  
Er Lin Ma
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Major Effect ◽  
Simulation System ◽  
Transient Performance ◽  
Performance Simulation ◽  
Single Cylinder ◽  
Motion Characteristics ◽  
Major Factors ◽  
Piston Assembly

The transient performance of engines is investigated in this paper. A mathematical model of single-cylinder engines is established and the friction torques produced by crankshaft bearing, piston assembly, pumping loss and other major factors are modeled. A dynamic simulation system is developed based on the MATLAB Simulink environment. Friction torques and instantaneous motion characteristics of the engine are predicted. The results show that crankshaft bearing, piston assembly, and pumping loss have a major effect on the transient performance of the engine, and the models described in this paper provide an effective tool to simulate engine processes.

scholarly journals Mathematical modeling and experiment for hydraulic ejecting system of ceramic brick press

2021 ◽  
Vol 2079 (1) ◽  
pp. 012026
Author(s):  
HongBo Zheng ◽  
MingJun Li ◽  
QingQing Bian
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Theoretical Basis ◽  
Hydraulic System ◽  
Experimental Results ◽  
Ceramic Brick ◽  
Working Principle ◽  
The Mathematical Model

Abstract Taking the ejecting system of hydraulic system of 7200t ceramic brick press as the research object, the basic constitution and working principle of the hydraulic ejecting system are described, and its mathematical model is established and calculated. In order to verify the accuracy of the mathematical model, the experiment was carried out, and the experimental results were compared with the calculated according to the mathematical model. The two results were basically consistent, indicating that the mathematical model is accurate, and providing a theoretical basis for further research on the ceramic brick press.

scholarly journals A Graph Theory-Based Method for Dynamic Modeling and Parameter Identification of 6-DOF Industrial Robots

2021 ◽  
Vol 11 (22) ◽  
pp. 10988
Author(s):  
Jun Cheng ◽  
Shusheng Bi ◽  
Chang Yuan ◽  
Lin Chen ◽  
Yueri Cai ◽  
...  
Keyword(s):  
Parameter Identification ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
Theoretical Basis ◽  
Dynamic Parameter ◽  
Dynamic Parameters ◽  
Precision Manufacturing ◽  
Robot System ◽  
Precise Control ◽  
Dynamic Parameter Identification

At present, the absolute positioning accuracy and control accuracy of industrial serial robots need to be improved to meet the accuracy requirements of precision manufacturing and precise control. An accurate dynamic model is an important theoretical basis for solving this problem, and precise dynamic parameters are the prerequisite for precise control. The research of dynamics and parameter identification can greatly promote the application of robots in the field of precision manufacturing and automation. In this paper, we study the dynamical modeling and dynamic parameter identification of an industrial robot system with six rotational DOF (6R robot system) and propose a new method for identifying dynamic parameters. Our aim is to provide an accurate mathematical description of the dynamics of the 6R robot and to accurately identify its dynamic parameters. First, we establish an unconstrained dynamic model for the 6R robot system and rewrite it to obtain the dynamic parameter identification model. Second, we establish the constraint equations of the 6R robot system. Finally, we establish the dynamic model of the constrained 6R robot system. Through the ADAMS simulation experiment, we verify the correctness and accuracy of the dynamic model. The experiments prove that the result of parameter identification has extremely high accuracy and the dynamic model can accurately describe the 6R robot system mathematically. The dynamic modeling method proposed in this paper can be used as the theoretical basis for the study of 6R robot system dynamics and the study of dynamics-based control theory.

Dynamic Simulation Analysis of Belt Rupture for Belt Conveyor

2013 ◽  
Vol 313-314 ◽  
pp. 1120-1124 ◽  
Author(s):  
Hong Wei Ma ◽  
Dong Sheng Li ◽  
Xu Hui Zhang ◽  
Qing Hua Mao
Keyword(s):  
Finite Element ◽  
Dynamic Model ◽  
Dynamic Simulation ◽  
Dynamic Characteristics ◽  
Theoretical Basis ◽  
Simulation Analysis ◽  
Break Point ◽  
Simulation System ◽  
Belt Conveyor ◽  
Simulation Parameters

To study the dynamic characteristics of belt conveyor during belt rupture, the finite element dynamic model of belt conveyor was built. Dynamic simulation system of DTII type belt conveyor was established with AMESim. The simulation parameters were determined by DTII type belt conveyor design manual and the dynamic model. The speed, displacement of break point and mechanic characteristic carve in break moment were obtained. According to the result, the optimal capture time was confirmed.It provides the theoretical basis for the design of belt rupture equipment.

Longitudinal Dynamic Modeling of the Snowmobile Considering Fuel Economy

2011 ◽  
Vol 86 ◽  
pp. 333-336
Author(s):  
Xue Song Du ◽  
Huai Ju Liu ◽  
Cai Chao Zhu ◽  
Hua Feng Ding
Keyword(s):  
Dynamic Model ◽  
Dynamic Modeling ◽  
Fuel Economy ◽  
Design Tool ◽  
Experimental Results ◽  
Longitudinal Dynamic ◽  
Characteristic Map ◽  
Practical Engineering ◽  
Acceptable Deviation ◽  
Effective Design

Regulating line with the optimum fuel economy performance is investigated based on the universal characteristic map of the engine equipped on the snowmobile. The engine is supposed to run in a range near the optimum fuel economy performance regulating line with CVT speed regulating control. The dynamic model of the snowmobile is proposed, and simulation with Simulink is investigated. Though acceptable deviation occurs when compared with experimental results, reliability is validated for the model. With further amendments of the model, such as a further consideration of the slip state of the CVT when launching the snowmobile, the model can be applied to the practical engineering as an effective design tool.

Dynamic Model of the Knife Rollers in the Spiral Cutting Machines

2012 ◽  
Vol 164 ◽  
pp. 473-477
Author(s):  
Ling Song Wang ◽  
Ji Li Cheng ◽  
Dong Ai Wang ◽  
Hui Na Ni ◽  
Yu Chen Han
Keyword(s):  
Quantitative Analysis ◽  
Dynamic Model ◽  
Dynamic Simulation ◽  
Theoretical Basis ◽  
The Other ◽  
Packaging Materials ◽  
Other Hand ◽  
Ground Point ◽  
Set Up ◽  
The One

Nowadays, the spiral cutting machines have been widely used in many areas, such as packaging materials. However, the theoretical researches of that are very rare in academia. On the one hand, the machines’ technological principles are the commercial secrets. On the other hand, developing manufacturing of the machines has no theoretical basis. So, in a word, it’s blank in academia about the spiral cutting machines. In this article, we did quantitative analysis on the part of spiral knife roller and blade, and also set up a modal by describing that in a mathematical way. In addition, we analyzed spiral knife dynamically establishing equations of blade, ground point, roller as well, and finally realized dynamic simulation of the spiral knife by matlab tool. What’s the most special feature of this simulation is that it can do simulations for different parameters. The simulation is convenient for deepening theoretical researches, optimizing parameter selections and being auxiliary tools of design.

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