A Synchronous Approach for Numerical Simulation of Machine Tools

2015 ◽  
Vol 642 ◽  
pp. 317-322
Author(s):  
Yunn Lin Hwang ◽  
Van Thuan Truong
Keyword(s):  
Numerical Simulation ◽  
Machine Tools ◽  
Flexible Structure ◽  
Dynamical Parameter ◽  
Resonance Frequencies ◽  
Body Dynamics ◽  
Computer Aided ◽  
Bode Diagram ◽  
Multi Body ◽  
And Control

In this paper, a synchronous approach for dynamic simulation of machine tools is described. Computer Aided Engineering (CAE) method models and analyzes a dynamical parameter prototype of machine tools. In which, the flexible structure, interactive movement, non-linear factor effects as well as characteristics of resonance frequencies and mechanical transfer function are considered. The integrating Finite Element Method (FEM), Multi-Body Dynamics (MBD) and control carries out a solution of machine tools simulation for predicting dynamic machine behaviors. The static analysis and modal analysis of components are presented with sample examples. Cybernetic characteristics like Bode diagram and such a controller are implemented for movement tailors. The synchronous approach deduces a practically technical method for machines tools.

Dynamic and Control Strategy of Payload Motion for Deployment System

2012 ◽  
Vol 229-231 ◽  
pp. 2361-2364 ◽  
Author(s):  
Zi Fan Fang ◽  
Bing Fei Xiang ◽  
Qing Song He ◽  
De Xin Wu ◽  
Hua Pan Xiao
Keyword(s):  
Finite Element Method ◽  
Dynamic Model ◽  
Control Strategy ◽  
Wire Rope ◽  
Tension Control ◽  
Analysis Software ◽  
Collaborative Simulation ◽  
Body Dynamics ◽  
Multi Body ◽  
And Control

The dynamic model of wire rope with contact is presented based on finite element method and the flexible multi-body dynamics theory by putting the contact force between the wire rope and drum. The unilateral anti-sway and tension control strategy is put forward, and the dynamic model and collaborative simulation of payload motion for deployment system is modeled by dynamic analysis software RecurDyn and control library Colink. The correctness of the collaborative simulation model and control strategy is validated by analysis and comparison , which lays the foundation for further research on dynamic simulation of virtual prototype in nonlinear and complex mechanical-control system.

Dynamic Analysis and Control of Industrial Robotic Manipulators

2018 ◽  
Vol 883 ◽  
pp. 30-36 ◽  
Author(s):  
Yunn Lin Hwang ◽  
Jung Kuang Cheng ◽  
Van Thuan Truong
Keyword(s):  
Control System ◽  
Robotic Manipulators ◽  
Euler Method ◽  
End Effector ◽  
Feed Forward Control ◽  
Efficient Simulation ◽  
Body Dynamics ◽  
Multi Body ◽  
And Control ◽  
Manipulator Robot

Robot simulation has developed quickly in recent decades. Along with the development of computer science, a lot of simulation soft-wares have been created to perform many purposes such as studying kinematic, dynamic, and off-line program to avoid obstacle on manipulator robots. The main objective of this study is therefore to analyze kinematic, dynamic characteristics of an R-R robotic manipulator in order to control this robot. Newton-Euler method was used to calculate the torque acting on each joint of the robot. Then, a numerical model of the robot was established by a multi-body dynamics software to compare with the results obtained by Newton-Euler theory. After that, a feed-forward control system was created by RecurDyn/CoLink to control the end-effector of the robot following a desired trajectory. The results showed that this research can be used for efficient simulation of structural kinematics, dynamics as well as control of the real manipulator robot with the robot structure in a virtual environment.

Failure Analysis of Planetary Gear Shaft of Power Split Device Based on Multi-Body Dynamics

2013 ◽  
Vol 433-435 ◽  
pp. 17-20 ◽  
Author(s):  
Yan Liu ◽  
Jing Fang Ji ◽  
Long Kong ◽  
Yan Li ◽  
Ji Xin Wang
Keyword(s):  
Hybrid Electric Vehicle ◽  
Coupled Model ◽  
Planetary Gear ◽  
Threshold Function ◽  
Power Performance ◽  
Body Dynamics ◽  
Power Split ◽  
The Moment ◽  
Multi Body ◽  
And Control

Power split device (PSD) affects the power performance and control strategy of hybrid electric vehicle (HEV). In this paper, a new threshold function for wavelet denoising is used to reduce noise in test torque and rotational speed data. The dynamic simulation is carried out at the moment of planetary gear shaft (PGS) failure, after the rigid-flexible coupled model of PSD is established. According to the obtained stress of PGS, analysis of PGS fracture is verified.

scholarly journals Multi-Body Dynamics Modeling and Control for Strapdown Inertially Stabilized Platforms Considering Light Base Support Characteristics

2020 ◽  
Vol 10 (20) ◽  
pp. 7175
Author(s):  
Zhongshi Wang ◽  
Dapeng Tian ◽  
Lei Shi ◽  
Jinghong Liu
Keyword(s):  
Disturbance Compensation ◽  
Dynamics Modeling ◽  
Tracking Accuracy ◽  
Dynamics Model ◽  
Modeling And Control ◽  
Body Dynamics ◽  
Feedforward Controller ◽  
Multi Body ◽  
And Control ◽  
Compound Disturbance

The dynamics model used for inertially or strapdown inertially stabilized platforms is based on the rotor and motor load, and it either does not consider the stator or it implicitly assumes a fixed stator. It has been determined that vibrations occur in the system when a controller is used in strapdown inertially stabilized platforms with a light base support. As the system is also affected by multi-source disturbances, which are the main factors that affect the control accuracy. For the above two problems, this paper originally establishes a multi-body dynamics model including the controller. The composite controller not only suppresses the vibration successfully, but also greatly improves the disturbance compensation and tracking performance of the strapdown inertially stabilized platforms. Specifically, a modified feedback controller is used to suppress the vibrations analyzed according to the dynamics model. The friction feedforward and residual disturbance observer facilitates the design of compound disturbance compensation on the basis of composite hierarchical anti-disturbance control. To emphasize the advantages of strapdown inertially stabilized platforms, the feedforward controller employs feedforward angular velocity and acceleration. The results of the numerical analysis and experiments indicate that vibrations are successfully suppressed and tracking accuracy and disturbance isolation ability are improved.

Research on MFBD Modeling Method for a Gantry Machining Center Beam Components

2011 ◽  
Vol 188 ◽  
pp. 487-492 ◽  
Author(s):  
Q.J. Yang ◽  
D.N. Li ◽  
L.L. Kong ◽  
K. Li
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
High Speed ◽  
Modeling Method ◽  
Ball Screw ◽  
Machining Processes ◽  
Element Analysis ◽  
Machining Center ◽  
Body Dynamics ◽  
Multi Body

In modern machining processes, Gantry Machining Center is one of the most important machine tools. Moreover, beam components directly relate to the overall performance. From multi-body simulation (MBS) and finite element analysis (FEA) respectively, the paper discusses current state of the multi-body dynamics modelling of the machine tool components in domestic and overseas. In this paper, We adopt a method, the multi-flexible body dynamics(MFBD) modeling method for machine tool transmission components (linear guidance and ball screw drives) in software Recurdyn, to create the conditions for MFBD simulation analysis of the beam components system. Much more, it provides a way of MFBD modelling for machine tools components in both the high-speed and high-performance.

Modeling and Control of a Nonlinear Active Suspension Using Multi-Body Dynamics System Software

2014 ◽  
Vol 67 (1) ◽  
Author(s):  
M. Fahezal Ismail ◽  
Y. M. Sam ◽  
S. Sudin ◽  
K. Peng ◽  
M. Khairi Aripin
Keyword(s):  
Ride Comfort ◽  
Active Suspension ◽  
Suspension System ◽  
Ride Quality ◽  
System Software ◽  
Composite Nonlinear Feedback ◽  
Modeling And Control ◽  
Body Dynamics ◽  
Multi Body ◽  
And Control

This paper describes the mathematical modeling and control of a nonlinear active suspension system for ride comfort and road handling performance by using multi-body dynamics software so-called CarSim. For ride quality and road handling tests the integration between MATLAB/Simulink and multi-body dynamics system software is proposed. The control algorithm called the Conventional Composite Nonlinear Feedback (CCNF) control was introduced to achieve the best transient response that can reduce to overshoot on the sprung mass and angular of control arm of MacPherson active suspension system. The numerical experimental results show the control performance of CCNF comparing with Linear Quadratic Regulator (LQR) and passive system. 

scholarly journals Optimizing Electric Adjustment Mechanism Using the Combination of Multi-body Dynamics and Control

2019 ◽  
Vol 35 ◽  
pp. 1363-1369
Author(s):  
Yu Congyang ◽  
Zhu Dequan ◽  
Wang Chaoxian ◽  
Zhu Lin ◽  
Chu Tingting ◽  
...  
Keyword(s):  
Adjustment Mechanism ◽  
Body Dynamics ◽  
Dynamics And Control ◽  
Multi Body ◽  
And Control
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