Kinematics Analysis and Simulation of Small Satellite Docking Mechanism End Executor

2014 ◽  
Vol 487 ◽  
pp. 460-464
Author(s):  
Yuan Zhang ◽  
Ying Ying Wang ◽  
Yan Song ◽  
Li Li Zhou
Keyword(s):  
Simulation Analysis ◽  
Initial Conditions ◽  
Control Function ◽  
Space Mission ◽  
Kinematics Analysis ◽  
Capture Process ◽  
Adams Software ◽  
Docking Mechanism ◽  
New Type ◽  
And Control

In order to save space mission cost, prolonging the working life of the spacecraft and improving the flexibility and capable of performing various tasks should get more attention on orbit servicing technology. For the docking process of a new type of two independent service in-orbit spacecraft, this paper finished the kinematics analysis, for the whole docking capture process, two groups of different initial conditions and control function of the simulation analysis were finished by the ADAMS software. The results prove that the docking mechanism performance is very good, and reliable connection can be realized in the general initial conditions.

Dynamic Simulation Analysis for Docking Mechanism of On-Orbit-Servicing Satellite

2014 ◽  
Vol 487 ◽  
pp. 313-318
Author(s):  
Yuan Zhang ◽  
Jian Wang ◽  
Yan Song ◽  
Li Li Sun
Keyword(s):  
Mathematical Model ◽  
Simulation Analysis ◽  
Initial Conditions ◽  
Euler Method ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Collision Dynamics ◽  
Docking Mechanism ◽  
Collision Force ◽  
The Mathematical Model

The new type of three jaw docking mechanism is designed for use in orbiting spacecraft, the mathematical model is given and its working characteristics are analyzed. By establishing the mathematical model of the interaction of the parts under the different coordinate system, it is obtained that the corresponding kinematic characteristics; contact collision dynamics model is established by using the Hertz model theory, dynamic equation is established by Newton-Euler method, and simulation analysis are carried out by using the dynamics simulation software ADAMS, through the simulation analysis of three groups with different initial conditions, the results show that it achieve reliable grasp with good performance, it provides the lock claw curve in contact collision force and movement characteristics curve. These curves provide reference to improve the performance of docking mechanism.

Gait Planning and Simulation Analysis of a New Amphibious Quadruped Robots

2018 ◽  
Vol 30 (2) ◽  
pp. 257-264
Author(s):  
Shuo Han ◽  
◽  
Yuan Chen ◽  
Guangying Ma ◽  
Jinshan Zhang ◽  
...  
Keyword(s):  
Simulation Analysis ◽  
Stability Margin ◽  
Quadruped Robot ◽  
Working Environment ◽  
Practical Application ◽  
Quadruped Robots ◽  
Driving Mechanisms ◽  
Adams Software ◽  
New Type ◽  
The Stability

In order to allow quadruped robots to adapt to the complex working environment in the field of fisheries and aquaculture, a new type of quadruped robot with linear and rotary driving is proposed, and the kinematic inverse solution of the leg of the quadruped robot is deduced. For achieving quadruped robot smooth walking, the straight gait of the quadruped robot is planned according to the stability margin principle of motion, so that the stability margin of the machine is 20 mm when three legs supporting it. The planning gait is simulated by ADAMS software, the kinematics and dynamics analysis of the four main driving mechanisms of the robot leg were carried out, and the feasibility of using the STEP5 driving function to execute the planning gait in the quadruped robot was verified. The theoretical and simulation curve analysis results show that, the quadruped robot according to the planned gait can complete the cycle and have a stable walking. The results of this study can provide a reference for the practical application of the new amphibious quadruped robot in the fields of complex and uneven ground in the field of fisheries and aquaculture to realize exploration, fishing and transportation.

scholarly journals Geometric design and kinematics analysis of coplanar double internal meshing non-circular planetary gear train

2018 ◽  
Vol 10 (12) ◽  
pp. 168781401881891 ◽  
Author(s):  
Chao Lin ◽  
Xiguang Xia ◽  
Peilu Li
Keyword(s):  
Design Method ◽  
Planetary Gear ◽  
Gear Train ◽  
Prototype Model ◽  
Kinematics Analysis ◽  
Planetary Gear Train ◽  
Kinematics Simulation ◽  
Adams Software ◽  
New Type ◽  
Internal Meshing

A new type of non-circular planetary gear train is proposed, in which the planetary gear is internally meshed with the sun gear and the ring gear at the same time. The structural form and transmission principle are analyzed, and the design method of non-circular gear pitch curves and related parameters of the gear train are discussed. The input–output relationship under various working conditions of the gear train is deduced. The precise tooth profile of the non-circular gears is obtained by the Boolean operation of MATLAB, then the virtual prototype model of the planetary gear train is established, and the kinematics simulation is carried out in the ADAMS software. The simulation results verify the correctness of the transmission principle and the theoretical analysis of the motion law.

Kinematics Model of the 6-DOF Underwater Manipulator and Control System Design Based on PLC Technology

2014 ◽  
Vol 620 ◽  
pp. 343-346
Author(s):  
Tao Yao ◽  
Zong Yu Chang
Keyword(s):  
Control System ◽  
Degrees Of Freedom ◽  
Kinematics Analysis ◽  
Kinematics Model ◽  
Kinematics Modeling ◽  
Adams Software ◽  
Underwater Manipulator ◽  
Control Requirement ◽  
6 Degrees Of Freedom ◽  
And Control

The paper introduces kinematics analysis for a kind of 6 degrees of freedom underwater manipulator. Firstly, kinematics model was established based on D-H principle; The solving process of kinematics direct solution and inverse solution of manipulator was presented. Secondly, Numerical simulation is performed based on ADAMS software, every joint speed and acceleration curve is obtained. The working principals and control requirement of underwater manipulator are illustrated; Based on kinematics modeling, the control system of manipulator was designed based on PLC and carried out the control the function of the manipulator.

Broadening Design and Preparation of MDF Absorber for Electromagnetic Pollution Control in S-Band

2013 ◽  
Vol 405-408 ◽  
pp. 2754-2759
Author(s):  
Wan Jun Hao ◽  
Ming Ming Wang ◽  
Yue Fang Zhang ◽  
Fan Wu ◽  
Dong Wei Chen ◽  
...  
Keyword(s):  
Pollution Control ◽  
Simulation Analysis ◽  
Dielectric Material ◽  
New Materials ◽  
Electromagnetic Environment ◽  
Theoretical Design ◽  
New Type ◽  
Electromagnetic Pollution ◽  
And Control ◽  
High Absorption

This paper reported a new type MDF absorber of high absorption and Broadband was successfully prepared, according to the Electromagnetic Wave Absorbing Theory, by means of the theoretical design and simulation analysis by using MDF as the dielectric material and And with the resistance film composite. Results shown that the resistance of resistive film was 195Ω/□, the monolayer combined sample with thickness as 1.4cm in 2~4 GHz frequency bands, the range of absorbing over -20dB could achieve 50%, and all absorption could exceed -15dB in the whole S-band, the maximum absorption peak was -25dB, moreover, the absorption bandwidth of MDF was more than λ/4 Type EWM-absorber. The new materials could be used to improve residential electromagnetic environment and control pollution.

Performance of 4G-LTE Communication and Navigation System in Blended Wing-Body UAS

2019 ◽  
Vol 8 (4) ◽  
pp. 9538-9542
Keyword(s):  
Satellite Communication ◽  
Line Of Sight ◽  
Multiple Factors ◽  
The World ◽  
New Type ◽  
Blended Wing Body ◽  
4G Lte ◽  
The Right ◽  
And Control ◽  
Technology Demonstrator

In vision of searching for the right Unmanned Aerial System (UAS) for a specific mission, there are multiple factors to be considered by the operator such as mission, endurance, type of payload and range of the telemetry and control. This research is focusing on extending control range of the UAS by using 4G-LTE network to enable beyond-line-of-sight flying for the commercial UAS. Major UAS such Global Hawk, Predator MQ-1 are able to fly thousands of kilometers by the use of satellite communication. However, the satellite communication annual license subscription can be very expensive. With this situation in mind, a new type of flight controller with 4G-LTE communication has been developed and tested. Throughout the research, blended-wing-body (BWB) Baseline B2S is used as the platform for technology demonstrator. Result from this analysis has proven that the proposed system is capable to control a UAS from as far as United Kingdom, with a latency less than 881 ms in average. The new added capability can potentially give the commercial UAS community a new horizon to be able to control their UAS from anywhere around the world with the availability of 4G-LTE connection

scholarly journals CFD Simulation of Solid Suspension for a Liquid–Solid Industrial Stirred Reactor

2021 ◽  
Vol 11 (12) ◽  
pp. 5705
Author(s):  
Adrian Stuparu ◽  
Romeo Susan-Resiga ◽  
Alin Bosioc
Keyword(s):  
Chemical Reaction ◽  
Cfd Simulation ◽  
Simulation Analysis ◽  
Solid Phase ◽  
Initial Conditions ◽  
Chemical Reactor ◽  
Liquid Mixtures ◽  
Multiphase Model ◽  
Chemical Product ◽  
Two Phase

The present study examines the possibility of using an industrial stirred chemical reactor, originally employed for liquid–liquid mixtures, for operating with two-phase liquid–solid suspensions. It is critical when obtaining a high-quality chemical product that the solid phase remains suspended in the liquid phase long enough that the chemical reaction takes place. The impeller was designed for the preparation of a chemical product with a prescribed composition. The present study aims at finding, using a numerical simulation analysis, if the performance of the original impeller is suitable for obtaining a new chemical product with a different composition. The Eulerian multiphase model was employed along with the renormalization (RNG) k-ε turbulence model to simulate liquid–solid flow with a free surface in a stirred tank. A sliding-mesh approach was used to model the impeller rotation with the commercial CFD code, FLUENT. The results obtained underline that 25% to 40% of the solid phase is sedimented on the lower part of the reactor, depending on the initial conditions. It results that the impeller does not perform as needed; hence, the suspension time of the solid phase is not long enough for the chemical reaction to be properly completed.

The Research and Simulation Analysis of a New Type of Translational Transmission Device

2014 ◽  
Vol 556-562 ◽  
pp. 1408-1412
Author(s):  
Zhi Qiang Zhang
Keyword(s):  
Modeling And Simulation ◽  
Theoretical Foundation ◽  
Simulation Analysis ◽  
Structural Modeling ◽  
Structural Features ◽  
Practical Application ◽  
Optimization Analysis ◽  
New Type ◽  
Mechanism Parameter ◽  
Relationship Of

In this paper, the following work is done: a new type of translational transmission device is designed; explained in detail are the operating principle, structural features, relationship of mechanism parameter and non interference conditions of the movement; the optimization analysis of transmission device is implemented on the basis of non interference conditions of the bucket movement; structural modeling and simulation analysis are carried out by utilization of Pro/e & Recurdyn; and based on virtual prototype technology, the new type of translational transmission device is verified by experiments, the data of which prove the translational transmission device reasonable and practicable. In conclusion, this paper has laid the theoretical foundation of the practical application of the translational transmission device.

Dynamic Characteristic Analysis of New Pneumatic Bending Joint

2012 ◽  
Vol 271-272 ◽  
pp. 1742-1749
Author(s):  
Peng Cheng Huang ◽  
Qing Hua Yang ◽  
Guan Jun Bao ◽  
Li Bin Zhang
Keyword(s):  
Response Time ◽  
Dynamic Characteristic ◽  
Simulation Analysis ◽  
Characteristic Analysis ◽  
Pneumatic Actuators ◽  
Bending Performance ◽  
First Law Of Thermodynamics ◽  
Existing Problems ◽  
Joint Damping ◽  
New Type

Aimed at existing problems on the bending performance of pneumatic bending joint, a new type of pneumatic bending joint is proposed in this paper. Double flexible pneumatic actuators are used as actuating drivers. Based on the first law of thermodynamics and the joint dynamic equation, the angle dynamic model is established and analyzed. Moreover simplified model is proposed. Meanwhile, its dynamic characteristic is analyzed through simulation analysis. The simulation suggests the following results: in the gas-filled phase, the joint’s pressure response time is about 10ms; while it is about 60ms in the gas-escape phase; and the angle response time of joint is 10 to 20ms. When the joint damping coefficient is increasing, this value will also increase.

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