scholarly journals DESIGN AND KINEMATICS ANALYSIS OF MECHANICAL ARM OF TRIMMER

2021 ◽  
pp. 403-412
Author(s):  
Qiang Liang ◽  
Hao Wang
Keyword(s):  
Simulation Analysis ◽  
Labour Force ◽  
Three Dimensional ◽  
Working Environment ◽  
Parameter Method ◽  
Individual Tree ◽  
Time Pattern ◽  
Kinematics Simulation ◽  
Modeling Software ◽  
Social Wealth

The development of mechanization has greatly liberated the labour force, promoted socialized mass production, and created infinite social wealth. Its influence is significant and far-reaching, and agricultural production has undergone revolutionary changes. Aiming at the problems of poor working environment, high labour intensity and low working efficiency of manual pruning, a mechanical arm of branch pruning machine was designed, which realized the three-dimensional layered cylindrical pruning of individual tree. In this paper, a five-degree-of-freedom trimmer manipulator is designed, which is mainly composed of base, big arm, small arm, wrist and finger blade. The motion equation of the mechanism is established by using the Denavit–Hartenberg parameter (D-H parameter) method, and the corresponding motion curve is fitted by using MATLAB software. The components of the trimmer arm are designed virtually by using 3D modeling software, and assembled into a complete trimmer arm. The assembly drawing is imported into the simulation analysis software ADAMS for kinematics simulation. The results show that the speed-time pattern has obvious positive and negative changes at 3s, which proves that this stage is the hand cutting stage of jujube pruning; The acceleration time graph is gentle in the whole movement, and the curve approaches to a straight line, which proves that the movement of the mechanical arm of the jujube pruning machine is stable in the pruning process. Through the analysis of the simulation curve, it provides a theoretical basis for the research of the mechanical arm of the trimmer.

Mechanical System Simulation Analysis of Shearer Cutting Unit Based on Adams

2012 ◽  
Vol 268-270 ◽  
pp. 856-859
Author(s):  
Qing Liang Zeng ◽  
Bin Zhang ◽  
Jian Liang Li ◽  
Xing Hua Wang ◽  
Zai Chao Wu
Keyword(s):  
Mechanical System ◽  
3D Modeling ◽  
Simulation Analysis ◽  
System Simulation ◽  
Three Dimensional ◽  
Solid Model ◽  
Working Mechanism ◽  
Modeling Software ◽  
Direct Reflection ◽  
Cutting Unit

Shearer cutting unit is the main working mechanism of the shearer and its performance is a direct reflection of the performance of the shearer. Three-dimensional solid model of shearer cutting unit mechanical system was built by 3D modeling software Pro/E, and then it was imported into ADAMS through a dedicated interface module. After adding constraints and movement driven and calibrating model, the simulation analysis in the ADAMS was established and analysis of the forces of the three key pin hinge point was achieved, which provided the basis for the shearer cutting unit mechanical system design.

Kinematics Simulation Analysis of a Kind of Pedal Rehabilitation Robot

2014 ◽  
Vol 602-605 ◽  
pp. 848-852
Author(s):  
Wen Long Wang ◽  
Ji Rong Wang
Keyword(s):  
Lower Limb ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Lower Limbs ◽  
Rehabilitation Robot ◽  
Movement Trajectory ◽  
Three Dimensional Model ◽  
Kinematics Simulation ◽  
Limb Rehabilitation ◽  
Lower Limb Rehabilitation

This paper describes the design of the gait mechanism of pedal lower limb rehabilitation robot based on people’s heel movement trajectory curve in the normal walking. It is established the kinematics mathematical model of a pedal lower limbs rehabilitation robot and the simplified three-dimensional model with Pro/e software, then it is simulated kinematics using ADAMS software. The simulation result is shown that this pedal lower limbs rehabilitation robot can achieve the expected rehabilitation exercise and run smoothly. Kinematics analysis and simulation of pedal rehabilitation robot is provided the necessary theoretical basis and parameters for the study of lower limb rehabilitation machinery.

Design and Motion Simulation Analysis on Automobile Constant Velocity Universal Joints Driving Shaft

2013 ◽  
Vol 380-384 ◽  
pp. 3-7
Author(s):  
Feng Li Huang ◽  
Li Jun Wang ◽  
Yong Qing Lin ◽  
Yun Zhao
Keyword(s):  
Constant Velocity ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Simulation Software ◽  
Constant Speed ◽  
Dynamics Simulation ◽  
Motion Simulation ◽  
Modeling Software ◽  
Speed Performance ◽  
Universal Joints

the automobile constant velocity universal joint driving shaft is the important component in modern cars, its design is mainly to check the movement compatibility of parts. The constant velocity universal joints driving shaft is designed by three-dimensional solid modeling software UG, and the motion simulation model is build by multi-body dynamics simulation software to investigate the constant speed performance of constant velocity universal joints driving shaft, and check the motion trace of steel ball which is the key component of constant velocity universal joints. The results show that the constant speed performance is good, and the track design of star-like inner race is reasonable.

Simulation Analysis of Drive System of Wind Turbine Gearboxes

2012 ◽  
Vol 476-478 ◽  
pp. 2079-2082
Author(s):  
Zi Xu Liu ◽  
Fu Kun Chen ◽  
Bo Wang ◽  
Guo Dong Zhou ◽  
Tian Biao Yu ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Physical Model ◽  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Prototype Model ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Software ◽  
Simulation Results

Based on three dimensional modeling software Solidworks, the physical model of 2MW wind turbine’s gear box is constructed and transferred into ADAMS, and then the virtual prototype model of the gearbox is established by adding constraint and load. According to the working state of the gearbox in different wind, the dynamic simulation is carried out, obtaining the revolution of the output shaft and mesh force of all gears. The simulation results compared with the theoretical values to verify the accuracy of the simulation.

Modeling and Simulation of Hydraulic Turnover Device for Large Bearing House

2012 ◽  
Vol 226-228 ◽  
pp. 660-664
Author(s):  
Xin Cai Zhu ◽  
Lei Guo ◽  
You Qing Ding ◽  
Shun Hong Lin
Keyword(s):  
Simulation Analysis ◽  
Model Simulation ◽  
Three Dimensional ◽  
Simulation Software ◽  
Data Format ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Practical Design ◽  
Modeling Software

The geometric models of the hydraulic turnover device are constructed by using three -dimensional modeling software UG, and then they are induced into simulation software ADAMS by a sharing data format. By using ADAMS, models are further simplified and the virtual prototype is established. By using the associated model, the simulation of the hydraulic turnover device is analyzed in ADAMS. Compared with the traditional methods of using physical prototypes, the movement processes and relevant parameters of the hydraulic turnover device can be effectively obtained by means of this method. Furthermore, the quality of the constraint relations between the parts is very important in terms of the accuracy of the model simulation analysis. This simulation results accord with the practical situation, which indicates that the operation is stable and the efficiency is high. It provides a theoretical basis for the practical design of the hydraulic turnover device, which shows that the combination of ADAMS and UG works well.

Study on Kinematics Simulation of Multi-Joint Robotic Gripper Based on ADAMS

2013 ◽  
Vol 444-445 ◽  
pp. 1384-1388
Author(s):  
Bin Hua ◽  
Yi Lin Chi ◽  
Xue Jun Wang ◽  
Quan Bai ◽  
Wei Zhong
Keyword(s):  
Simulation Analysis ◽  
Geometric Model ◽  
Characteristic Curve ◽  
Three Dimensional ◽  
Virtual Prototype ◽  
Prototype Model ◽  
Three Dimensional Model ◽  
Improve Design ◽  
Kinematics Simulation ◽  
Adams Software

The article describes how we can use the virtual prototyping technology validate mechanism design of multi-joint manipulator and its grabbing performance and loading abilities per minute. It completes the three-dimensional model of virtual prototype with Solid Edge ST5, and be imported into ADAMS software. And then the manipulator kinematics simulation is carried out in ADAMS. Using the kinematics simulation technology of ADAMS, we can get the various joints in a working cycle of the displacement characteristic curve, the velocity and acceleration curves of working conditions. This paper introduces how to establish the geometric model of articulated robot virtual prototype model. And some key technology details such as adding a constraint to model are also described. Kinematics simulation analysis of the manipulator with ADAMS software can greatly shorten the design cycle, improve design accuracy and reduce the cost of product development.

scholarly journals Using Airborne Light Detection and Ranging (LIDAR) to Characterize Forest Stand Condition on the Kenai Peninsula of Alaska

2009 ◽  
Vol 24 (2) ◽  
pp. 95-102 ◽  
Author(s):  
Hans-Erik Andersen
Keyword(s):  
Forest Inventory ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Grid Cell ◽  
Forest Stand ◽  
Light Detection And Ranging ◽  
Inventory Analysis ◽  
Light Detection ◽  
Individual Tree ◽  
Kenai Peninsula

Abstract Airborne laser scanning (also known as light detection and ranging or LIDAR) data were used to estimate three fundamental forest stand condition classes (forest stand size, land cover type, and canopy closure) at 32 Forest Inventory Analysis (FIA) plots distributed over the Kenai Peninsula of Alaska. Individual tree crown segment attributes (height, area, and species type) were derived from the three-dimensional LIDAR point cloud, LIDAR-based canopy height models, and LIDAR return intensity information. The LIDAR-based crown segment and canopy cover information was then used to estimate condition classes at each 10-m grid cell on a 300 × 300-m area surrounding each FIA plot. A quantitative comparison of the LIDAR- and field-based condition classifications at the subplot centers indicates that LIDAR has potential as a useful sampling tool in an operational forest inventory program.

Configuration Design and Simulation of Exoskeleton for Upper Limb Rehabilitation Train

2014 ◽  
Vol 701-702 ◽  
pp. 654-658 ◽  
Author(s):  
Yuan Zhang ◽  
Qiang Liu ◽  
Ji Liang Jiang ◽  
Li Yuan Zhang ◽  
Rui Rui Shen
Keyword(s):  
Upper Limb ◽  
Simulation Analysis ◽  
Motion Simulation ◽  
Upper Limb Rehabilitation ◽  
Motion Data ◽  
Upper Limb Exoskeleton ◽  
Movement Data ◽  
Kinematics Simulation ◽  
Motion Process ◽  
Limb Rehabilitation

A new upper limb exoskeleton mechanical structure for rehabilitation train and electric putters were used to drive the upper limb exoskeleton and kinematics simulation was carried. According to the characteristics of upper limb exoskeleton, program control and master - slave control two different ways were presented. Motion simulation analysis had been done by Pro/E Mechanism, the motion data of electric putter and major joints had been extracted. Based on the analysis of the movement data it can effectively guide the electric putter control and analysis upper limb exoskeleton motion process.

Research on the Reliability of Box for Gear Test Bed

2011 ◽  
Vol 121-126 ◽  
pp. 1744-1748
Author(s):  
Xiang Yang Jin ◽  
Tie Feng Zhang ◽  
Li Li Zhao ◽  
He Teng Wang ◽  
Xiang Yi Guan
Keyword(s):  
Power Flow ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Test Bed ◽  
Kinematics Simulation ◽  
Beveloid Gears ◽  
Overall Performance

To determine the efficiency, load-bearing capacity and fatigue life of beveloid gears with intersecting axes, we design a mechanical gear test bed with closed power flow. To test the quality of its structure and predict its overall performance, we establish a three-dimensional solid model for various components based on the design parameters and adopt the technology of virtual prototyping simulation to conduct kinematics simulation on it. Then observe and verify the interactive kinematic situation of each component. Moreover, the finite element method is also utilized to carry out structural mechanics and dynamics analysis on some key components. The results indicate that the test bed can achieve the desired functionality, and the static and dynamic performance of some key components can also satisfy us.

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