• Title/Summary/Keyword: 기구학적 설계

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A Research on the Wheelchair Carrier for Disabled Driver (장애인 휠체어 캐리어에 관한 연구)

  • Lee, S.C.;Park, S.S.
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.6 no.1
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    • pp.9-15
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    • 2012
  • In this paper, the feasibility of a wheelchair carrier for the disabled own driver is checked kinematically to fit one of current domestic vans by drawings, design. A van with 9 passengers is selected for the modification to attach the wheelchair carrier and test the operation in real situation. The trajectory and motion process are studied to protect from the interception with outside body of van, and the conceptual design is proceeded kinematically. For the detail design, the stress analysis and driving mechanism with power supply must be studied and selected basically.

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Suspension and Kinematics (현가장치와 기구학)

  • 이언구
    • Journal of the korean Society of Automotive Engineers
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    • v.26 no.2
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    • pp.10-16
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    • 2004
  • 일반적으로 기구라 함은 어떤 한정된 상대운동을 할 수 있도록 각종 Joint로 연결된 여러 강체들의 조합을 의미한다. 또한 기구는 많은 기계적 장치들의 가장 중요한 설계인자중의 하나라 할 수 있는 기하학적 특성들을 구현할 수 있도록 구성되어지며, 그 기하학적 특성은 주로 주 관심 대상인 강체의 기준 강체에 대한 궤적 특성이라 할 수 있겠다.(중략)

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Analysis of Vehicle Dynamics with Car Suspension Design (자동차 현가장치 설계에 따른 동역학 해석 및 활용 (맥퍼슨 스트러트형 현가장치에 대하여))

  • 조승백;임준택
    • Journal of the KSME
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    • v.33 no.10
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    • pp.871-883
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    • 1993
  • 차량의 승차감 및 조안 성능을 결정하는 중요한 인자인 현가장치(Supension System) 설계의 최적화를 기하며 실차육성기간을 줄이고 설계 업무의 효율성을 높이기 위하여 각종 차량 특성 인자의 수치화를 통해 여러 가지 해석을 수행하게 된다. 이러한 해석 과정으로는 크게 현가장 치의 기구학적 특성-Kinematic Analysis-과 부시 (Bush)와 스프링 (Spring) 등의 컴플라이언스 (Compliance) 효과 - 쿼지스테틱 어낼러시스 (Quasistatic Analysis)-와 전체차량의 주행 시뮬 레이션 (simulation)을 통한 설계차량의주행안정성 검토-풀 비클 어낼러시스 (Full Vehicle Analysis)- 등이 있다. 이 글에서는 승용차의 현가장치중 대표적인형인 맥퍼슨 스터러트형에 대 하여 1) 기구학적 특성, 2) 부시와 스프링 등의 컴플라이언스 효과, 3) 전체차량의 주행 시뮬레 이션을 통한 차량의 주행 안정성 검토의 순으로 각 단계별 주요 검토 항목과 인자, 그리고 실제 차량에서의 현상에 대하여 소개한다.

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Optimum Design of Suspension Systems Using a Genetic Algorithm (유전 알고리즘을 이용한 현가장치의 기구학적 최적설계)

  • 이덕희;김태수;김재정
    • Transactions of the Korean Society of Automotive Engineers
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    • v.8 no.5
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    • pp.138-147
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    • 2000
  • Vehicle suspension systems are parts which effect performances of a vehicle such as ride quality, handing characteristics, straight performance and steering effort etc. Kinematic design is a decision of joints` position for straight performance and steering effort. But, when vehicle is rebounding and bumping, chang of joints` displacement is nonlinear and a surmise of straight performance and steering effort at that joints` position is difficult. So design of suspension systems is done through a inefficient method of tried-and-error depending on designer`s experience. In this paper, kinematic design of suspension systems was done through the optimal design using a genetic algorithm. For this optimal design, the function for quantification of straight performance and steering effort was made, and the kinematic design method of suspension systems having this function as the objective function was suggested.

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Kinematic Synthesis and Analysis of RSS-SC Suspension System Using Acceptable Tolerances of Motion (운동의 허용공차를 이용한 RSSS-SC 현장장치의 기구학적 설계)

  • 김선평;심재경
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.11
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    • pp.2672-2679
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    • 2000
  • In synthesizing and RSSS-SC mechanism that is the kinematic model of the McPherson strut suspension system in automobiles, the design equations for R-S, S-S and S-C dyads should be solved separately for a given set of prescribed positions. The number of prescribed positions that the RSSS-SC mechanism can be synthesized is up to three because of the S-C dyad. This limitation may cause unsatisfactory results in synthesized joint positions. This paper presents a kinematic synthesis method to place the joints of an RSSS-SC mechanism in desired boundaries by varying the prescribed positions of the mechanism within acceptable tolerances. The sensitivity analysis of the joint positions is used determine which displacement parameter should be altered to fulfill this task.

Approximate Synthesis of 5-SS Multi Link Suspension System (근사 합성법을 이용한 5-SS 멀티 링크 현가장치의 기구학적 설계)

  • 김선평;심재경;안병의;이언구
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.11
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    • pp.2665-2671
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    • 2000
  • Dimensional Synthesis, which is apart of kinematic synthesis, is to determine the dimensions of a mechanism of preconceived typer for a specified task and prescribed performance. In this paper, in an effort to provide designers with flexibility, a dimensional approximate synthesis method is presented for utilizing prescribed tolerance both the displacement and joint positions of a mechanism to be synthesized. For this, a constrained optimization problem is formulated with displacement parameters and joint positions as variables. The proposed method is applied to the synthesis of a 5-SS multi link suspension mechanism. The method discussed here, however, can be easily applied to any mechanism of which the kinematic constraint equations can be derived.

Kinematic Optimal Design of Excavator with Performance Analysis (굴삭기의 기구학적 최적설계와 성능해석)

  • 한동영;김희국;이병주
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1994.10a
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    • pp.617-622
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    • 1994
  • In this paper, we perform a two-stage, kinematic optimal design for 3 degree-of-freedom excavator system which consists of boom, arm, and bucket. The objective of the first stage is to find the optimal joint parameters which maximize the force-torque transmission ratio between the hydraulic actuator and the rotating joint. The objective of the first stage is to find the optimal link parameters which maximize the isotropic characteristic throughout the workspace. It is illustrated that performances of the optimized excavator are improved compared to those of HE280 excavator, with respect to the described performace index and maximum load handling capacity.

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얀센 메커니즘 기반 Centroid와 Stability를 고려한Line tracing 로봇설계

  • Kim, Jong-Jin;Park, Dong-Mun
    • Proceeding of EDISON Challenge
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    • 2017.03a
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    • pp.574-578
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    • 2017
  • 본 연구는 4절 링크 이론(four-bar likage mechanism)과 얀센 메커니즘(Jansen mechanism)을 기반으로 다관절 보행로봇을 제작하고, 로봇의 움직임에 대하여 기구학적인 해석을 제시한다. 또한 라인 트레이싱(Line tracing) 방법을 활용한 자동주행 설계를 위해 아두이노 호환 보드와 적외선 센서 4개를 보행로봇에 부착하여 자동 주행 로봇을 제작하였다.

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