Dynamics analysis and control of a spacecraft mechanism with joint clearance and thermal effect

2019 ◽  
pp. 163-215
Author(s):  
Bindi You ◽  
Dong Liang ◽  
Yang Zhao ◽  
Hao Tian ◽  
Huibo Zhang ◽  
...  
Keyword(s):  
Thermal Effect ◽  
Joint Clearance ◽  
Dynamics Analysis ◽  
And Control

On modeling and dynamics of a multiple launch rocket system

2021 ◽  
pp. 095441002098224
Author(s):  
Bo Li ◽  
Xiaoting Rui ◽  
Guoping Wang ◽  
Jianshu Zhang ◽  
Qinbo Zhou
Keyword(s):  
Monte Carlo ◽  
Multibody Systems ◽  
Euler Method ◽  
Dynamics Analysis ◽  
Analysis Problem ◽  
Dynamic Design ◽  
Proposed Model ◽  
And Control ◽  
Rocket System ◽  
Complete Process

Dynamics analysis is currently a key technique to fully understand the dynamic characteristics of sophisticated mechanical systems because it is a prerequisite for dynamic design and control studies. In this study, a dynamics analysis problem for a multiple launch rocket system (MLRS) is developed. We particularly focus on the deductions of equations governing the motion of the MLRS without rockets by using a transfer matrix method for multibody systems and the motion of rockets via the Newton–Euler method. By combining the two equations, the differential equations of the MLRS are obtained. The complete process of the rockets’ ignition, movement in the barrels, airborne flight, and landing is numerically simulated via the Monte Carlo stochastic method. An experiment is implemented to validate the proposed model and the corresponding numerical results.

Dynamics Analysis and Control of 5 DOF Robot Manipulator

2021 ◽  
Author(s):  
Muhammad Salman ◽  
Hamza Khan ◽  
Saad Jamshed Abbasi ◽  
Min Cheol Lee
Keyword(s):  
Robot Manipulator ◽  
Dynamics Analysis ◽  
And Control

Motion-mode energy method for vehicle dynamics analysis and control

2013 ◽  
Vol 52 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Nong Zhang ◽  
Lifu Wang ◽  
Haiping Du
Keyword(s):  
Energy Method ◽  
Vehicle Dynamics ◽  
Dynamics Analysis ◽  
And Control ◽  
Mode Energy ◽  
Motion Mode

Nonlinear dynamics and control of crank–slider mechanism with link flexibility and joint clearance

2015 ◽  
Vol 230 (5) ◽  
pp. 737-755 ◽  
Author(s):  
Sadeq Yaqubi ◽  
Morteza Dardel ◽  
Hamidreza Mohammadi Daniali
Keyword(s):  
Point Contact ◽  
Joint Clearance ◽  
Connecting Rod ◽  
Continuous Contact ◽  
Saturation Limit ◽  
Dynamical Behaviors ◽  
Control Scheme ◽  
Dynamics And Control ◽  
Link Flexibility ◽  
And Control

Dynamical behaviors and control of planar crank–slider mechanism considering the effects of joint clearance and link flexibility are studied. A control scheme for maintaining continuous contact is proposed. It was observed that using one actuator for control scheme might cause the actuator to reach its saturation limit, a problem that was bypassed by installing an additional actuator on connecting rod. In one actuator case, only continuous contact can be obtained, while with the aid of two actuators, point contact can be achieved. Great improvements in the performance of mechanism and reduction of vibrations are observed in the case of using an additional actuator.

Dynamics analysis of dual-axis positioning mechanism of satellite antenna with joint clearance

2014 ◽  
Vol 10 (1) ◽  
pp. 59-74
Author(s):  
Zheng Feng Bai ◽  
Yang Zhao ◽  
Jun Chen
Keyword(s):  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Engineering Application ◽  
Friction Model ◽  
Joint Clearance ◽  
Force Model ◽  
Dynamics Analysis ◽  
Satellite Antenna ◽  
Content Type ◽  
Continuous Contact

Purpose – The existence of clearance in joints of positioning mechanism is inevitable and the movements of the real mechanism are deflected from the ideal mechanism due to the clearances. The purpose of this paper is to investigate the effects of clearance on the dynamic characteristics of dual-axis positioning mechanism of a satellite antenna. Design/methodology/approach – The dynamics analysis of dual-axis positioning mechanism with clearance are investigated using a computational approach based on virtual prototyping technology. The contact model in joint clearance is established by using a hybrid nonlinear continuous contact force model and the friction effect is considered by using a modified Coulomb friction model. Then the numerical simulation of dual-axis positioning mechanism with joint clearance is carried out and four case studies are implemented for different clearance sizes. Findings – Clearance leads to degradation of the dynamic performance of the system. The existence of clearance causes impact dynamic loads, and influences the motion accuracy and stability of the dual-axis positioning mechanism. Larger clearance induces higher frequency shakes and larger shake amplitudes, which will deteriorate positioning accuracy. Practical implications – Providing an effective and practical method to analyze dynamic characteristics of dual-axis positioning mechanism of satellite antenna with joint clearance and describing the dynamic characteristics of the dual-axis positioning system more realistically, which improves the engineering application. Originality/value – The paper is the basis of mechanism design, precision analysis and robust control system design of dual-axis positioning mechanism of satellite antenna.

Dynamics Analysis and Control of the Malkus-Lorenz Waterwheel with Parametric Errors

2019 ◽  
pp. 57-70
Author(s):  
Angelo M. Tusset ◽  
Jose M. Balthazar ◽  
Mauricio A. Ribeiro ◽  
Wagner B. Lenz ◽  
Thiago C. L. Marsola ◽  
...  
Keyword(s):  
Dynamics Analysis ◽  
And Control

Dynamics Analysis of a Novel Mine Disaster Searching Robot

2010 ◽  
Vol 39 ◽  
pp. 363-368
Author(s):  
Jie Zhao ◽  
Lei Zhu ◽  
Xi Zhe Zang ◽  
Gang Feng Liu ◽  
Gang Liu
Keyword(s):  
Euler Method ◽  
Robot Motion ◽  
Dynamics Analysis ◽  
The Novel ◽  
Tractive Force ◽  
Planning And Control ◽  
Joint Location ◽  
Terrain Parameters ◽  
Set Up ◽  
And Control

A novel mine disaster searching robot is designed in order to increase the searching capability in a mine disaster. The dynamics of the novel mine searching robot is mainly studied. The kinematics is set up based on the joint location restriction and then the dynamic model is built by Newton-Euler method. The tractive force and slip of tracks of the mine searching robot is analyzed when moving on the different ground. A theoretic reference is provided for distinguishing the terrain parameters experienced by the mine searching robot and for robot motion planning and control.

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