This paper introduces a new concept of zero-platform delta robot with three key parameters affecting the shape and size workspace. is applied to directly bring torus configuration into links shows its usefulness in configuring generating workspace conveniently. Analyzing parallel robots, such as requires extensive computation due constraints between links, typically requiring complex equations or numerical methods. proposes method for quickly estimating using cross-section diagram based on...

This study aimed to evaluate the applicability of outdoor air enthalpy difference method for source heat pumps (ASHP) in operation through quantitative analysis using field tests. In this context, measurements were performed on a single ASHP, and results compared with other situ measurement methods. The main are as follows. distribution discharge temperature unit suggested that between hub tip outlet can represent temperature, enabling further simplification procedures. mean error average...

We investigated various numerical methods including a physical-based empirical equation, linear regression, shallow neural network, and deep learning approaches, to compare their accuracy for predicting the hardness of tempered martensite in low alloy steels. The which had been previously proposed with experimental data, was labelled used present study. While it smaller number coefficients, prediction equation almost similar that regression model based on response surface method. machine...

본 연구는 시와 무용 Effort의 구성요소를 접목한 작품 호수에 빠진 혀를 자넷 애드쉐드(Janet Adshead)의 분석 방법을 적용하여 분석함으로써 작품의 미학적 접근과 해석 지평을 확장시키는 것에 목적을 두었다. 문헌 연구를 통해 무용의 상호관계에 대한 역사적, 예술적 배경을 파악하여 이론적 정립하였으며, 분석에서는 애드쉐드의 『무용분석의 이론과 실제』(1996)의 분석법을 참고하여, 과정을 총 3단계로 나누어 진행하였다. 각 단계적 접근은 구성, 형식, 해석의 기술과 시의 구성 요소를 접목하여 움직임 형태에 초점을 맞춰 방법 및 기준을 설계하여 분석하였다. 이를 언어, 이미지와 비유, 리듬과 운율, 구조와 형식은 작품에서 다양한 방식으로 표현되며, 요소와 결합하여 미적 가치를 향상시킬 수 있다는 점을 발견하였다. 아울러 이 연구가 가치와 해석을 깊이 있게 이해하는 데 기여하며, 표현의 측면을 탐구하여 예술의 위상을 높이는 기여할 있을것으로 기대한다.

Delta robots are usually used for industrial manufacturing, but heavy weight and expensive price have been obstacles to rapid propagation of in the field. The goal this research is make light-weight price-competitive delta robots. To reduce weight, we plastic material arm link, price, a step-motor as main actuator. First formulated equations inverse kinematics designed robot then verified these by using multibody-dynamics simulation. An algorithm motion control was developed applied...

Recently, as “Freeform buildings” have increased in number, studies on ways to increase productivity the construction of freeform buildings are increasing. In case 3D printing construction, many being conducted using material extrusion method; among methods, manufacturing forms laminated object (LOM) can overcome limitation presented above. However, there is a lack cases used LOM sites, so it necessary work and study slicing method suitable for construction. Therefore, this paper, we propose...

Casting defects, which are closely related to entrapped air bubbles and metallic oxides, occur very frequently in the casting process. Many researchers have shown that these defects can be reduced by adopting an appropriate gating system design. But, it is difficult for field engineers identify a specific more their products. In this study, we tried draw comparison of designs with without ceramic foam filters. A filter was added horizontal runner just after sprue prevent bubble generation...

We applied two numerical schemes to improve accuracy of the solution in flow simulation molten metal. One method is Piecewise Linear Interface Calculation (PLIC) and other Donor-Acceptor (D-A) method. In present work, we have tested simple problems verify module interface reconstruction algorithms. After validations, efficiency these methods compared by simulating various real products. On free surface flow, it possible for PLIC track very accurately between phases. method, however, has weak...

주조 유동 해석 분야에서 형상 고정 격자계(body-fitted coordinate; BFC)의 적용은 양질의 해석결과를 얻을 수 있음에도 불구하고 격자 생성의 어려움과 효율성으로 인해 많이 사용되지 않고 있다. 반면에 직교 격자계(Cartesian coordinate)는 상대적으로 생성이 쉽고 빠르기 때문에 공정에서 주로 사용되어 왔으나 이 역시 형상을 제대로 표현하지 못함으로써 발생하는 문제들로 올바른 결과를 수가 없다. 본 연구에서는 PCT(Partial Cell Treatment)를 기반으로 하는 Cut 방법을 격자계에 적용함으로써 격자계의 장점은 유지하면서도 정확한 있었다. 방법으로 간단한 형상의 테스트와 실제 제품에 대한 적용을 해보았다.

The fluid-structure interaction, especially the interaction between elastic body and ambient flow, is one of very complicated problems to be analyzed in engineering. oscillated freely, consequently information from wake fed back into motion. a strong nonlinear it so difficult analyze experimentally. In this article problem on oscillation an numerically, which features lock-in regime structure are made clear. existence harmonic pointed out, called "pseudo-lock-in".