Simulation analysis of basic motion performance of a tracked efficient steering platform

2015 ◽  
pp. 407-412
Keyword(s):  
Simulation Analysis ◽  
Motion Performance ◽  
Basic Motion

The Virtual Prototype Modeling Research of a Wind Tunnel Test Platform with Member Flexibility

2013 ◽  
Vol 655-657 ◽  
pp. 425-429
Author(s):  
Lan Lei Zhao ◽  
Wen Jia Chen ◽  
Li Jun Shi ◽  
Lu Yang Li ◽  
Yan Zhong He
Keyword(s):  
Wind Tunnel ◽  
Simulation Analysis ◽  
Characteristic Curve ◽  
Wind Tunnel Test ◽  
Dynamics Simulation ◽  
Rolling Motion ◽  
Accurate Analysis ◽  
Test Platform ◽  
Physical Prototype ◽  
Motion Performance

The rigid-flexible hybrid modeling of the wind tunnel test platform is established by means of ANSYS and ADAMS for more accurate analysis of the motion performance of the test platform in this paper. We get the kinematical characteristic curve based on the three working conditions of the pitching motion, yawing motion, rolling motion of the test platform. According to the characteristic curve indirectly reflects the rationality of the design configuration. So as to provide fundamental basis for the precision dynamics simulation analysis and make the real physical prototype are offered.

scholarly journals Design and Motion Performance Analysis of Turbulent AUV Measuring Platform

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 460
Author(s):  
Yunli Nie ◽  
Dalei Song ◽  
Zhenyu Wang ◽  
Yan Huang ◽  
Hua Yang
Keyword(s):  
Autonomous Underwater Vehicle ◽  
Simulation Analysis ◽  
Northern South China Sea ◽  
Angle Of Attack ◽  
Horizontal Distance ◽  
Flow Distortion ◽  
High Quality ◽  
Maximum Angle ◽  
Motion Performance ◽  
Shear Probe

The use of a multi-functional autonomous underwater vehicle (AUV) as a platform for making turbulence measurements in the ocean is developed. The layout optimization of the turbulence package and platform motion performance are limitation problems in turbulent AUV design. In this study, the computational fluid dynamics (CFD) method has been used to determine the optimized layout position and distance of the shear probe integrated into an AUV. When placed 0.8 D ahead of the AUV nose along the axis, the shear probe is not influenced by flow distortion and can contact the water body first. To analyze the motion of the turbulence AUV, the dynamic model of turbulence AUV for planar flight is obtained. Then, the mathematical equations of speed and angle of attack under steady-state motion have also been obtained. By calculating the hydrodynamic coefficients of the turbulence AUV and given system parameters, the simulation analysis has been conducted. The simulation results demonstrated that the speed of turbulent AUV is 0.5–1 m/s, and the maximum angle of attack is less than 6.5°, which meets the observation requirements of the shear probe. In addition, turbulence AUV conducted a series of sea-trials in the northern South China Sea to illustrate the validity of the design and measurement. Two continuous profiles (1000 m) with a horizontal distance of 10 km were completed, and numerous high-quality spatiotemporal turbulence data were obtained. These profiles demonstrate the superior flight performance of turbulence AUV. Analysis shows that the measured data are of high quality, with the shear spectra being in very good agreement with the Nasmyth spectrum. Dissipation rates are consistent with background shear. When shear velocity is weak, the measurement of dissipation rate is 10−10 W Kg−1. All indications are that the turbulence AUV is suitable for long-term, contiguous ocean microstructure measurements, which will provide data needed to understand the temporal and spatial variability of the turbulent processes in the oceans.

Simulation Analysis of Pneumatic Rubber Bellows for Segment of Hyper-Redundant Robotic Mechanism

2014 ◽  
Vol 611 ◽  
pp. 10-21 ◽  
Author(s):  
Erik Prada ◽  
Ivan Virgala ◽  
Grzegorz Granosik ◽  
Alexander Gmiterko ◽  
Štefan Mrkva
Keyword(s):  
Simulation Analysis ◽  
Fem Analysis ◽  
Pneumatic Actuator ◽  
Cad Model ◽  
Redundant Manipulator ◽  
Electromagnetic Actuators ◽  
Basic Motion

The paper deals with a design and simulations of segment for hyper-redundant manipulator. In the paper 6-DOF manipulator segment, which consists of pneumatic and electromagnetic actuators, is designed. CAD model of the segment is introduced and basic parts are described. The basic motion is reached by pneumatic actuator which works through the rubber bellows and it utilizes their expansion properties. Main focus of the study besides segment design is analysis of rubber bellows. From this reason FEM analysis is done in software SolidWorks. In the conclusion the results are discussed.

scholarly journals Dynamic Simulation Analysis and Experiment of Large-caliber Self-propelled Pipeline Crawler Based on ADAMS

2021 ◽  
Vol 2095 (1) ◽  
pp. 012049
Author(s):  
Yinlong Tang ◽  
Huadong Song ◽  
Yating Yu ◽  
Jun Zhang ◽  
Wenguang Hu ◽  
...  
Keyword(s):  
Simulation Analysis ◽  
Solution Process ◽  
Analysis Method ◽  
Long Period ◽  
The Past ◽  
Output Torque ◽  
Driving Wheel ◽  
Motion Performance ◽  
Solid Works ◽  
Torque Values

Abstract The force states of driving wheels are different when the self-propelled pipeline crawler moves in the pipeline, so it is difficult to carry out accurate theoretical analysis and calculation on the force and output torque values of each driving wheel in horizontal, climbing and turning conditions of the crawler. Due to the complex mechanical properties of pipeline sealing and the limitation of visualization, it takes a long period and high cost to develop the robot in pipeline by experimental means. With the gradual application of virtual simulation means, the complicated dynamic analysis and solution process in the past has become relatively easy. In this paper, Solid works is used to establish a simplified model of the crawler, and ADAMS is used to analyze and simulate the dynamics of the crawler. The force of the multi-wheel driven pipeline crawler is given under the condition of horizontal, climbing 35° and turning, which provides the necessary analysis method and theoretical basis for the design optimization and improvement. Finally, the horizontal, climbing and bending motion performance of the crawler is verified by comprehensive pipeline experiment.

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Application of Coupled Structural Acoustic Analysis and Sensitivity Calculations to a Tire Noise Problem

2012 ◽  
Vol 40 (1) ◽  
pp. 25-41 ◽  
Author(s):  
H. M. R. Aboutorabi ◽  
L. Kung
Keyword(s):  
Performance Improvement ◽  
Acoustic Analysis ◽  
Simulation Analysis ◽  
Analysis Method ◽  
Vehicle Manufacturer ◽  
Element Analysis ◽  
Equipment Manufacturer ◽  
Tire Noise ◽  
Fea Modeling ◽  
Testing Instruments

Abstract REFERENCE: H. M. R. Aboutorabi and L. Kung, “Application of Coupled Structural Acoustic Analysis and Sensitivity Calculations to a Tire Noise Problem,” Tire Science and Technology, TSTCA, Vol. 40, No. 1, January – March 2012, pp. 25–41. ABSTRACT: Tire qualification for an original equipment (OE) program consists of several rounds of submissions by the tire manufacturer for evaluation by the vehicle manufacturer. Tires are evaluated both subjectively, where the tire performance is rated by an expert driver, and objectively, where sensors and testing instruments are used to measure the tire performance. At the end of each round of testing the evaluation results are shared and requirements for performance improvement for the next round are communicated with the tire manufacturer. As building and testing is both expensive and time consuming predictive modeling and simulation analysis that can be applied to the performance of the tire is of great interest and value. This paper presents an application of finite element analysis (FEA) modeling along with experimental verification to solve tire noise objections at certain frequencies raised by an original equipment manufacturer (OEM) account. Coupled structural-acoustic analysis method was used to find modal characteristics of the tire at the objectionable frequencies. Sensitivity calculations were then carried out to evaluate the strength of contribution from each tire component to the identified modes. Based on these findings changes to the construction were proposed and implemented that addressed the noise issue.

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