Cotton Picker Picks Roller Motion Simulation and Dynamics Analysis

2010 ◽  
Vol 34-35 ◽  
pp. 1765-1769 ◽  
Author(s):  
Wen Lei Sun ◽  
Xiao Li Li ◽  
Chang Bing Fu
Keyword(s):  
Simulation Model ◽  
Prototype Model ◽  
Dynamics Analysis ◽  
Motion Simulation ◽  
Key Factors ◽  
Road Speed ◽  
Cotton Picker ◽  
Cotton Picking ◽  
Movement Simulation ◽  
Moving Speed

The drum is the process of picking cotton, picking cotton picker cotton picker head of the key device, which controls the seat tube and Abstract Abstract ingot of movement, Abstract spindle picking of cotton is also directly affect the quality and efficiency of key factors. Therefore, by creating a virtual prototype model cotton picker roller, about picking cotton picker principle, and the movement simulation model to arrive at, dynamic model of the external force, the cotton picker spindles moving speed of the Summary Block pipe displacement, velocity and acceleration effects. Then summed up, cotton picker of road speed, picking rate and the net rate of mining.

Motion Simulation of Mountain High Altitude Work Vehicle Based on UG/Motion

2012 ◽  
Vol 220-223 ◽  
pp. 526-530
Author(s):  
Hao Wu ◽  
Xue Wei Wu ◽  
Hong Jun Wang ◽  
Hong Fu Zhang
Keyword(s):  
Simulation Model ◽  
High Altitude ◽  
Mechanical Design ◽  
Virtual Model ◽  
Basic Process ◽  
Motion Simulation ◽  
Work Efficiency ◽  
Model And Simulation ◽  
Simulation Results ◽  
Movement Simulation

This paper introduces the function and basic process of UG movement simulation module UG/Motion, establishment the virtual model and simulation model of Mountain High Altitude Work Vehicle and motion simulation on it, simulation the practice movement of Mountain High Altitude Work Vehicle and obtains motion law and the parameters, and output simulation results through animation and chart. Practice shows that use UG / Motion for motion simulation is an effective aid for mechanical design, and improve work efficiency and perfect the design.

Motion Simulation of an Articulated Robotic Arm Subjected to Static Forces

1982 ◽  
Vol 104 (2) ◽  
pp. 494-503
Author(s):  
A. G. Patwardhan ◽  
A. H. Soni
Keyword(s):  
Simulation Model ◽  
Driving Forces ◽  
Three Dimensional ◽  
General System ◽  
Open Loop ◽  
Rigid Bodies ◽  
Robotic Arm ◽  
Motion Simulation ◽  
Static Loads ◽  
Generalized Parameters

A three-dimensional motion simulation model of an open-loop kinematically constrained mechanical system is developed to simulate the motion response of a robotic arm to externally applied static loads. The general system consists of N rigid bodies connected together by (N-1) kinematic pairs. The class and type of kinematic pairs may be selected from a set of twelve physically realizable kinematic pairs. Six equations of force equilibrium are written for an ith body. A variational method is used to linearize these equations for incremental values of displacement and to incorporate the generalized parameters of the kinematic pairs and characteristics of the internal driving forces. Five applications of the proposed simulation model are discussed.

Flexible Body Grasping Simulation in ADAMS

2014 ◽  
Vol 487 ◽  
pp. 509-512
Author(s):  
Yu Zhang ◽  
Zhong Jun Fu ◽  
Hui Fang Liu
Keyword(s):  
System Dynamics ◽  
Simulation Model ◽  
Elastic Deformation ◽  
System Simulation ◽  
Difficult Problem ◽  
Basic Theory ◽  
Flexible Body ◽  
Dynamics Analysis ◽  
Flexible Bodies ◽  
Data Basis

Analysis of Flexible Body is a difficult problem in system dynamics analysis. In the paper, the basic theory of ADAMS flexible body and some methods of adding flexible bodies to a model are introduced. And build a system simulation model. Through manipulator grasping tomatoes examples verify the effectiveness of ADAMS flexible body grasp simulation, provide stress and elastic deformation data basis for manipulator grasping flexible body.

Virtual Prototype Modeling and Dynamics Analysis of a Large-Scale Wind Turbine’s Gearbox

2011 ◽  
Vol 314-316 ◽  
pp. 1043-1047
Author(s):  
Guo Yu Hu ◽  
Wen Lei Sun
Keyword(s):  
Optimal Design ◽  
Angular Velocity ◽  
Wind Turbine ◽  
Large Scale ◽  
Virtual Prototype ◽  
Design Parameters ◽  
Prototype Model ◽  
Flexible Body ◽  
Dynamics Analysis ◽  
Simulation Results

With the gearbox of a large-scale wind turbine as a study object, the virtual prototype model of gearbox is created based on UG and ADAMS softwares according to its design parameters such as structure and size. By rigid and flexible dynamics analysis for gearbox, the angular velocity and acceleration curves of the in-out shaft are obtained. Gear meshing forces and flexible body stress cloud using ADAMS are also obtained. It is verified that these results are coincided with the theoretical value through analysis and the simulation results of ADAMS are valid. The simulation results show that the design level of wind turbine gearboxes can be improved using the virtual prototype technology and lay a good foundation for further optimal design.

CONFIGURATION SET TO MOTION SIMULATION FOR BACKHAND STROKE OF TENNIS

2011 ◽  
Vol 23 (04) ◽  
pp. 307-317
Author(s):  
Chung-Shun Hung ◽  
Li-Cheng Hsieh ◽  
Ran-Sing Chen ◽  
Hong-Wen Wu ◽  
Yi-Hung Ho
Keyword(s):  
Simulation Model ◽  
Wrist Joint ◽  
Upper Extremities ◽  
Motion Simulation ◽  
Warm Up ◽  
Stiffness And Damping ◽  
Kinetics Of ◽  
Kinematics And Kinetics ◽  
Fitting Parameters ◽  
Human Joint

Many people sustain injuries while playing tennis due to improper methods of impacting the ball and insufficient muscle warm-up. A common injury of playing the backhand stroke would be either elbow flexor strain or extensor strain. It is popular to analyze the motion of backhand stroke using kinematics and kinetics of upper extremities. In this research, the LifeMOD™ module developed from a commercially available software, ADAMS, was used for simulation. The objective is to determine the relatively fitting parameters, using compared results obtained from LifeMOD™ and Matlab. According to various researches, the parameters for each human joint set in LifeMOD™ that would play key roles for the results are stiffness, damping, and weighting. For stiffness and damping parameters, 105 N/m and 104 Ns/m respectively, is a better set for each joint. And for the weighting parameter, 10 is the best setting value for wrist joint, yet, either setting value would be applied for rest joints. In addition, the simulation model would be facile to observe the forces and moments of the joints in kinematics and kinetics for tennis backhand stroke.

scholarly journals Dynamic Simulation of UHMWPE Cable Winding Process of Parallel Grooved Multi-Layer Drum Based on ADAMS

2021 ◽  
Author(s):  
Fankai Kong ◽  
Wenbo Cui ◽  
Fei Chen ◽  
Zhenyang Wang ◽  
Zhongchen Zhou
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Virtual Prototype ◽  
Prototype Model ◽  
Specific Load ◽  
Rotating Speed ◽  
Simulation Results ◽  
Prototype Software ◽  
Selection Of

According to the insufficient force analysis of the cable in the process of winch retraction, especially the insufficient research on the flexible cable retraction process such as the UHMWPE cable, the dynamic simulation analysis of the retraction process of the parallel grooved multi-layer drum and UHMWPE cable cable is carried out by using the virtual prototype software ADAMS. The simulation model of the cable is created by using the macro command program, and the virtual prototype model of the cable drum is completed, and the force changes of the cable under different rotating speeds are simulated.The simulation results show that the contact force between the cable and the double winding drum can be quickly stable under the specific load, and with the increase of the rotating speed, the maximum value of the tension change of the cable increases, but it is finally stable at a fixed value. The results can provide some reference for structural strength calculation of cable storage drum, selection of high molecular polyethylene cable and dynamic analysis of cable arranger under load.

scholarly journals A Systems Dynamic Approach to Alzheimer’s Disease Prevention

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Nasim S. Sabounchi
Keyword(s):  
Risk Factors ◽  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
System Dynamics ◽  
Simulation Model ◽  
Disease Incidence ◽  
Prevention Strategies ◽  
Key Factors ◽  
Individual Level ◽  
The Life Course

ABSTRACT ObjectivesAs estimated there are about 5.3 million who suffer from Alzheimer’s disease in United States. The incidence is increasing as the population is aging. Due to the increasing trend of Alzheimer’s disease, there is a lot of discussion on prevention efforts or slowing the incidence. Also, models that could predict individual risk of cognitive impairment are needed to assist in prevention efforts.  In general dementia development has been associated with growth in various vascular, lifestyle and other risk factors. Epidemiological research provides evidence of some vascular, lifestyle and psychological risk factors that are modifiable and protective of disease incidence either independently or while interacting with other factors. However, as reported by National Institute of Aging, it is not yet clear whether health or lifestyle factors can prevent Alzheimer’s disease. The objective of this research project is to adopt a system dynamics modeling approach to study the interaction of several key factors including vascular, lifestyle and psychological aspects over the life course of individuals, to gain further understanding of Alzheimer’s disease incidence and evaluate prevention strategies. Both datasets of ‘Alzheimer's Disease Neuroimaging Initiative (ADNI)’ and ‘Health and Retirement Study (HRS)’ will be used for model development and validation. ApproachA system dynamics approach is an optimal choice for addressing the goal of this proposal because different key factors interact over time and make Alzheimer’s disease incidence a complex problem. Furthermore, system dynamics approaches focus on understanding the relationship between the structure of a system and the resulting dynamic behaviors generated through multiple interacting feedback loops. Such an approach could be invaluable in studying dynamic problems arising in complex health, social, economic, or ecological systems. ResultsFor the purpose of the proposal, the following stages are planned:1. Develop a system dynamics simulation model at individual level that predicts the Alzheimer’s disease incidence over the life course, and aggregates individual level models to predict population level trends 2. Calibrate the resulting simulation model based upon longitudinal data trends employed from Alzheimer's Disease Neuroimaging Initiative (ADNI) database. Both cohorts with Alzheimer’s disease and control subjects from this database will be used to fine-tune the simulation model. ConclusionThe final validated model would be used to test different hypotheses and evaluate various strategies and/or their combinations to help evaluate the efficacy of prevention strategies on Alzheimer’s disease incidence and its growth.

Electrostatic separation motion analysis of machine-harvested cotton and residual film based on CFD

2020 ◽  
Vol 20 (3) ◽  
pp. 771-783
Author(s):  
Hongzhou Zhang ◽  
Qiaohua Wang ◽  
Yong Li ◽  
Yuanjie Liu ◽  
Danping Jia
Keyword(s):  
Electric Field ◽  
Solid Model ◽  
Plastic Film ◽  
Electrostatic Separation ◽  
Processing Efficiency ◽  
Cotton Picker ◽  
Cotton Picking ◽  
Cfd Method ◽  
Electric Field Force ◽  
Field Area

A solid model of electrostatic separation between mechanical cotton harvesting and residual plastic film is established. The mechanized harvesting degree has been improved year by year. 90% of the cotton harvesting has been achieved in the southern Xinjiang reclamation area of Xinjiang Production and Construction Corps. However, there are a lot of impurities in the machine harvesting cotton, and it is difficult to remove them. Machine-picked cotton cleaning is an important part of cotton processing. Its cleaning effect directly affects the processing efficiency and lint quality of cotton. In this paper, a solid model of electrostatic separation between mechanical cotton harvesting and residual plastic film is established. Through CFD method, the particles of mechanical cotton harvesting and residual plastic film fly into the electric field at the speed of 3 m/s, 4 m/s, 5 m/s and 6 m/s respectively, and the movement process of different electric field forces is loaded on the particles, in order to reveal the mechanism of electrostatic separation between mechanical cotton harvesting and residual plastic film. The test results show that with the increase of the speed of cotton picker flying into the electric field area, the shorter the residence time of cotton picker in the electric field area, the electric field force required for the film to be captured by the upper plate will gradually increase; the trajectory of particles in the electric field area has less influence on the airflow, and the inlet airflow velocity is the most important factor affecting the airflow distribution in the box. This study is expected to provide a reference for the application of electrostatic technology in the study of the cleaning process of mechanical cotton picking.

Dynamics Analysis and Parameter Optimization of New Vibration Platform

2014 ◽  
Vol 1061-1062 ◽  
pp. 771-775
Author(s):  
Yan Bin Liu ◽  
Chen Xu Yin ◽  
Jia Jia Ma
Keyword(s):  
Frequency Response ◽  
Parameter Optimization ◽  
Prototype Model ◽  
Flexible Body ◽  
Dynamics Analysis ◽  
Frequency Model ◽  
Body Model ◽  
New Type ◽  
Simulation Results ◽  
The Stability

A new type of vibration platform was presented and its dynamic characteristics was studied in this paper, A virtual prototype model of vibration platform was built by using software Soldworks and ADAMS.The flexible body model of spring was built based on ADAMS flexible module,rigid-flexible coupled dynamic of vibration platform were analyzed by using simulation, the natural frequency, model of vibration and frequency response were further analyzed. The stiffness of spring and flexible cable were optimized according to the analysis results, The post-optimality simulation results show that the stability and frequency response of vibration platform have improved.

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