Elastic Dynamics Optimization Design of Novel High-Speed Spatial Parallel Robot

2011 ◽  
Vol 415-417 ◽  
pp. 39-42
Author(s):  
Xiu Long Chen ◽  
Shuai Shuai Jia ◽  
Chong Jie Du ◽  
Shi Bo Shen
Keyword(s):  
Theoretical Basis ◽  
High Speed ◽  
Optimization Design ◽  
Dynamic Stress ◽  
Dynamic Performance ◽  
Parallel Robot ◽  
Improve Performance ◽  
Moving Platform ◽  
Simulation Results ◽  
Elastic Dynamics

In order to improve performance of 4-UPS-RPS high-speed spatial parallel robot, the elastic dynamics optimization design was executed. The influence law of the mass of moving platform and the diameter of driving limbs on the dynamic performance, which includes kinematics output response and maximum dynamic stress of driving limbs, were discussed. On these grounds, the mass of moving platform and the diameter of driving limbs were optimized. The simulation results show obvious improvement of the dynamics performance for 4-UPS-RPS parallel robot, therefore the theoretical basis are provided.

Optimization Design of Kinematics Performance of High-Speed Spatial Parallel Coordinate Measuring Machine

2011 ◽  
Vol 418-420 ◽  
pp. 2070-2073
Author(s):  
Xiu Long Chen ◽  
Qing Gao ◽  
Wei Ming Feng
Keyword(s):  
Performance Optimization ◽  
High Speed ◽  
Optimization Design ◽  
Coordinate Measuring Machine ◽  
Position Angle ◽  
Singular Value ◽  
Measuring Machine ◽  
Moving Platform ◽  
Simulation Results ◽  
Smallest Singular Value

In order to improve kinematics performance of high-speed spatial PCMM(parallel coordinate measuring machine), the comprehensive dexterity coefficient, which are defined to evaluate the whole dexterity of various configurations, was applied to the kinematics performance optimization of PCMM. By analyzing three dexterity measures, including conditional number, the smallest singular value and operation of PCMM, the comprehensive dexterity coefficient was proposed. The influence law of the distribution position angle of the joints on the stationary platform and moving platform, the distribution position radius of the joints on the stationary platform and moving platform on the comprehensive dexterity coefficient were discussed. On these grounds, the distribution position angle of the joints on the stationary platform and moving platform, the distribution position radius of the joints on the stationary platform and moving platform were optimized. The simulation results show obvious improvement of the kinematics performance for PCMM, so that the powerful theoretical basis and method of optimization design for the PCMM are provided.

Optimization Design Based on Static and Dynamic Performance of Beam

2011 ◽  
Vol 188 ◽  
pp. 743-749
Author(s):  
M. Cong ◽  
Q. Zhao ◽  
T. Han ◽  
D.D. Liu ◽  
Z.B. Duan ◽  
...  
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Dynamic Performance ◽  
Optimization Method ◽  
Improve Performance ◽  
Sizing Optimization ◽  
Machining Center ◽  
Before And After ◽  
Dynamic Performances ◽  
New Type

A new type of high speed vertical machining center which adopt gantry type structure is introduced. In order to improve performance of Beam, a sizing optimization based on static and dynamic performance is carried out. And a comparison is made between the analysis results before and after optimization. It is proved that the optimization method is feasible and both static and dynamic performances are improved.

scholarly journals Parametric Optimization Design of Auto-unloading Mechanism Based on Adams

2018 ◽  
Vol 175 ◽  
pp. 03052
Author(s):  
Yongliang Yuan
Keyword(s):  
Optimization Design ◽  
Parametric Optimization ◽  
Optimal Parameter ◽  
Dynamic Performance ◽  
Reference Value ◽  
Lifting Force ◽  
Parameter Combination ◽  
Simulation Results ◽  
Mechanical Devices ◽  
Relationship Of

In order to improve the dynamic performance of a truck dump mechanism, the optimal parameter combination of the dump mechanism is studied. In combination with Adams' own modeling work, the dump mechanism is simplified and modeled and simulated. The objective function is optimized with the minimum lifting force, and the parameter combination of the best position relationship of the dump mechanism is obtained. The simulation results show that Adams can accurately predict the optimal parameter combination of mechanical devices, which have certain reference value for engineering design.

Analysis and Simulation on Dynamic Stress of Tracked Vehicle Sprocket Based on Rigid-Flexible Coupling

2011 ◽  
Vol 199-200 ◽  
pp. 1358-1361 ◽  
Author(s):  
Bing Chen ◽  
Zheng Tian ◽  
Zhong Jun Yin
Keyword(s):  
High Speed ◽  
Dynamic Stress ◽  
Element Model ◽  
Coupling Model ◽  
Tracked Vehicle ◽  
Flexible Coupling ◽  
Single Tooth ◽  
Gear Ring ◽  
Simulation Results ◽  
The Finite Element Model

This paper established a high-speed tracked vehicle dynamics model, and simulated the transient response of sprocket when the vehicle is running at 60km/h on the D class road. the finite element model of the single tooth in mesh is established in Ansys and the rigid-flexible coupling model of "trackboard- sprocket" is established in RecurDyn. The dynamic stress and strain fringe of the sprocket’s gear ring is achieved by analysis. Simulation results show that the stress of tracked vehicle sprocket gear root and the fixed gear bolt hole is larger, and the stress concentration is detected at the edge of contacted tooth. The simulation results provide the calculation basis for the optimization of the high-speed tracked vehicle system and its lifespan prediction.

Study on Balance Simulation of Milling Tool Handle in High Speed Machining

2013 ◽  
Vol 397-400 ◽  
pp. 384-387
Author(s):  
Yun Na Xue ◽  
Li Xue ◽  
Guo Sheng Su
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Rotation Axis ◽  
Dynamic Performance ◽  
Center Of Mass ◽  
Balance Model ◽  
Static Balance ◽  
Balance Performance ◽  
Dimensional Parameters ◽  
Balance Structure

The balance performance of the tool handle influences the machining quality. Using the tool of the sensitivity analysis, the feasibility analysis and the optimization design in Pro/e software, by reasonably selecting the dimensional parameters of the balance structure, the distance between the center of mass and the rotation axis can be zero in order to achieve the static balance. After the dynamic simulation, the dynamic performance states that the static balance model is not fully dynamic balanced.

Research on the Flow Field of the Exhaust Valve for High Temperature Booster Pump

2011 ◽  
Vol 121-126 ◽  
pp. 1489-1494
Author(s):  
Bo Wu ◽  
Jian Ying Li ◽  
Jin Cheng Li ◽  
Jun Peng Shao
Keyword(s):  
High Temperature ◽  
Theoretical Basis ◽  
Optimization Design ◽  
Pressure Field ◽  
Exhaust Valve ◽  
Cone Type ◽  
Booster Pump ◽  
Simulation Results ◽  
Volume Method ◽  
Better Than

Exhaust valve is the key component of the reciprocating high temperature booster pump, its performance will directly affect the characteristic of the reciprocating high temperature booster pump. In order to improve the performance of the booster pump from structural optimization design, two types of exhaust valve are designed. Finite volume method is used to simulate the velocity filed and pressure field of the two types of exhaust valve. Simulation results show that the velocity gradient and pressure gradient of the cone-type exhaust valve is smaller and more uniform than the disk-type exhaust valve, and the performance of cone-type exhaust valve is better than the performance of disk-type exhaust valve, which provides the valuable theoretical basis for the exhaust valve in the practical production.

Dynamic Analysis of a Parallel Pick-and-Place Robot With Flexible Links

2008 ◽  
Author(s):  
Haihong Li ◽  
Zhiyong Yang
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Lithium Ion ◽  
Parallel Robot ◽  
Parallel Robots ◽  
Modeling And Analysis ◽  
Flexible Links ◽  
Pick And Place ◽  
Floating Frame ◽  
Pick And Place Operation

The dynamic modeling and analysis of a 2-DOF translational parallel robot for high-speed pick-and-place operation was presented. Considering the flexibility of all links, the governing equation of motion of a flexible link is formulated in the floating frame of reference using Euler-Lagrange method. A kineto-elasto dynamic model of the system is achieved, ready for modal analysis. Simulation in FEM software showed the similar modes with above computational result in typical location and rotation. The dynamic experiment presented the dominant modes and proved the theoretical analysis and simulation. The Diamond robot used in Lithium-ion battery sorting was taken as an example to demonstrate how to finish above studies. The result shows that the mechanism has good dynamic performance. The work is available for all parallel robots with flexible links.

scholarly journals Iterative Approach for Performance Improvement of PLC Systems

2018 ◽  
Vol 7 (4.4) ◽  
pp. 7
Author(s):  
Yu Min Hwang ◽  
Young Ghyu Sun ◽  
Issac Sim ◽  
Jin Young Kim
Keyword(s):  
Performance Improvement ◽  
System Performance ◽  
High Speed ◽  
Impulsive Noise ◽  
Multipath Fading ◽  
Power Line Communication ◽  
Zero Forcing ◽  
Improve Performance ◽  
Turbo Equalizer ◽  
Simulation Results

In this paper, we propose Turbo equalizer scheme using zero-forcing (ZF) and simulate in power line communication (PLC) systems with high speed. Due to impulsive noise and multipath fading in PLC systems, inter-symbol interference (ISI) happens. We employ Turbo equalizer scheme to get over ISI and improve performance. From simulation results, it is confirmed that the proposed Turbo equalizer can remarkably improve PLC system performance.  

Trajectory planning of a 4-RR(SS)2 high-speed parallel robot

Robotica ◽  
2022 ◽  
pp. 1-17
Author(s):  
Huipu Zhang ◽  
Manxin Wang ◽  
Haibin Lai ◽  
Junpeng Huang
Keyword(s):  
Trajectory Planning ◽  
Inverse Kinematics ◽  
High Speed ◽  
Movement Time ◽  
Parallel Robot ◽  
Acceleration And Deceleration ◽  
Moving Platform ◽  
Motion Parameters ◽  
Trajectory Interpolation ◽  
The Right

Abstract The trajectory-planning method for a novel 4-degree-of-freedom high-speed parallel robot is studied herein. The robot’s motion mechanism adopts RR(SS)2 as branch chains and has a single moving platform structure. Compared with a double moving platform structure, the proposed parallel robot has better acceleration and deceleration performance since the mass of its moving platform is lighter. An inverse kinematics model of the mechanism is established, and the corresponding relationship between the motion parameters of the end-moving platform and the active arm with three end-motion laws is obtained, followed by the optimization of the motion laws by considering the motion laws’ duration and stability. A Lamé curve is used to transition the right-angled part of the traditional gate trajectory, and the parameters of the Lamé curve are optimized to achieve the shortest movement time and minimum acceleration peak. A method for solving Lamé curve trajectory interpolation points based on deduplication optimization is proposed, and a grasping frequency experiment is conducted on a robot prototype. Results show that the grasping frequency of the optimized Lamé curve prototype can be increased to 147 times/min, and its work efficiency is 54.7% higher than that obtained using the traditional Adept gate-shaped trajectory.

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