KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Kaitwanidvilai, SomyotSubject: search.filters.subject.Finite element analysis

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Robot arm structure design using polyamide evaluated by finite element analysis
    (2020-01-01)
    Kaitwanidvilai, Somyot
    ;
    Buthgate, Siwawong
    ;
    Aoyama, Hisayuki
    ;
    Konghuayrob, Poom
    Robots have increasingly replaced humans for many jobs, including 24 h work, routine tasks, and dangerous jobs. However, the robot operating system has high power consumption in many processes. This has led to energy efficiency being the main focus. We have opted to build a robot with high strength, light weight, and low power consumption by reducing the weight of its components. Presently, we know that the structure of most robots in the world is made of metals, plastics, and composite materials. In this research, we designed the mechanical structure of robot arms with three different materials (cast iron, polyamide, and aluminum) using the finite element method to analyze and evaluate the possibilities of these materials. The dynamic load, power consumption, and mechanical characteristics were compared. It was found that polyamide could help lighten the weight by 40% and increase energy efficiency along with cost effectiveness by 41%. Although polyamide is particularly easy to find, cast iron is stronger than polyamide.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Resonance vibration analysis in double acting arm using FEM with PSO based non-uniform refinement
    (2012-01-01)
    Kaitwanidvilai, Somyot
    ;
    Ngamroo, Issarachai
    This paper proposes a new technique to analyze the resonance vibration problem, which is a major problem in Hard Disk Drive Arm (HDD arm), by using a multi-grid, Finite Element Analysis (FEA) with PSO (Particle Swarm Optimization) based non-uniform refinement level of mesh partitioning. Summation of error between the measured values of resonance frequencies from Laser Doppler Vibrometer (LDV) and the simulated values from the developed FEM program is formulated as the objective function in the optimization problem. Particle Swarm Optimization (PSO) is adopted to find the optimal characteristic lengths to achieve both fast simulation time and acceptable accuracy of the result. The proposed technique can reduce the computational time in the analysis and is adopted to study the behavior of resonance vibration affected by the epoxy thickness. The results show that the developed program can effectively simulate the resonance behavior in HDD arm. In addition, the computational results by the proposed method are obtained faster than those by the uniform refinement level method while the accuracy of results by both methods is almost the same. © 2012 ICIC International.