• Title/Summary/Keyword: Dynamic Design of System

Search Result 3,913, Processing Time 0.033 seconds

Integrated System for Dynamic Analysis and Optimal Design of Engine Mount Systems (엔진 마운트의 동특성 해석 및 최적설계 시스템)

  • 임홍재;성상준;이상범
    • Journal of KSNVE
    • /
    • v.11 no.1
    • /
    • pp.36-40
    • /
    • 2001
  • In this paper, an integrated system for dynamic analysis and optimal design of engine mount systems is presented. The system can simulate static and dynamic behaviors of engine mount systems and optimize design parameters such as mount stiffness, mounting locations with desired design targets of frequency or displacement. A FF-engine with an automatic transmission is used to demonstrate the analysis and optimal design capabilities of the proposed design system.

  • PDF

Optimal Design of Dynamic System Using a Genetic Algorithm(GA) (유전자 알고리듬을 이용한 동역학적 구조물의 최적설계)

  • Hwang, Sang-Moon;Seong, Hwal-Gyeong
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.16 no.1 s.94
    • /
    • pp.116-124
    • /
    • 1999
  • In most conventional design optimization of dynamic system, design sensitivities are utilized. However, design sensitivities based optimization method has numbers of drawback. First, computing design sensitivities for dynamic system is mathematically difficult, and almost impossible for many complex problems as well. Second, local optimum is obtained. On the other hand, Genetic Algorithm is the search technique based on the performance of system, not on the design sensitivities. It is the search algorithm based on the mechanics of natural selection and natural genetics. GA search, differing from conventional search techniques, starts with an initial set of random solutions called a population. Each individual in the population is called a chromosome, representing a solution to the problem at hand. The chromosomes evolve through successive iterations, called generations. As the generation is repeated, the fitness values of chromosomes were maximized, and design parameters converge to the optimal. In this study, Genetic Algorithm is applied to the actual dynamic optimization problems, to determine the optimal design parameters of the dynamic system.

  • PDF

Calculation of the Impact Force Applied on the Tooth of Upper and Lower Jaw-Bones in Masticating for the Design of a Dental Implant System. (MDO기법에 의한 임프란트설계에서 요구되는 저작시 상.하악골치아사이의 충격력 계산)

  • 권영주
    • Korean Journal of Computational Design and Engineering
    • /
    • v.7 no.1
    • /
    • pp.27-33
    • /
    • 2002
  • MDO(Multidisciplinary Design Optimization) methodology is a new technology to solve a complicate design problem with a large number of design variables and constraints. The design of a dental implant system is a typical complicate problem, and so it requires the MDO methodology. Actually, several analyses such as rigid body dynamic analysis and structural stress analysis etc. should be carried out in the MDO methodology application to the design of a dental implant system. In this paper, as a first step of MDO methodology application to the design of a dental implant system, the impact force which is applied on the tooth in masticating is calculated through the rigid body dynamic analysis of upper and lower jaw-bones. This analysis is done using ADAMS. The impact force calculated through the rigid body dynamic analysis can be used for the structural stress analysis of a dental implant system which is needed for the design of a dental implant system. In addition, the rigid body dynamic analysis results also show that the impact time decreases as the impact force increases, the largest impact force occurs on the front tooth, and the impact force is almost normal to the tooth surface with a slight tangential force.

A Study on Dynamic Design of Current Collection System for the Korean High Speed Train (한국형 고속전철 집전 시스템의 동적설계에 관한 연구)

  • Hur, Shin;Kyung, Jin-Ho;Song, Dahl-Ho
    • Proceedings of the KSR Conference
    • /
    • 1998.11a
    • /
    • pp.445-452
    • /
    • 1998
  • The dynamic performance design of catenary-pantograph system which collects current for the next generation Korean high speed train(KHST) was considered. Used was the same dynamic model of the catenary-pantograph system as that of TGV-K which will be introduced for Kyung-bu corridor. Using the model , sensitivity analysis fer design variables were made to improve dynamic performance of KHST system. The results of sensitivity analysis and performance improvement are as follows: (1) It was found that aerodynamic force, tension of contact wire, mass of contact strip, mass of supporting contact strip, mass of clamp, mass of steady arm, and stiffness of plunger were the design variables most influencing the dynamic performance of the system. (2) Pantograph with reductions of 20% aerodynamic force, 34% weight of supporting contact strip, 20% spring constant of plunger, and 34% equivalent mass of steady arm was very possible system for the KHST which will be running at maximum operating speed 350 km/h.

  • PDF

ANALYZING DYNAMIC FAULT TREES DERIVED FROM MODEL-BASED SYSTEM ARCHITECTURES

  • Dehlinger, Josh;Dugan, Joanne Bechta
    • Nuclear Engineering and Technology
    • /
    • v.40 no.5
    • /
    • pp.365-374
    • /
    • 2008
  • Dependability-critical systems, such as digital instrumentation and control systems in nuclear power plants, necessitate engineering techniques and tools to provide assurances of their safety and reliability. Determining system reliability at the architectural design phase is important since it may guide design decisions and provide crucial information for trade-off analysis and estimating system cost. Despite this, reliability and system engineering remain separate disciplines and engineering processes by which the dependability analysis results may not represent the designed system. In this article we provide an overview and application of our approach to build architecture-based, dynamic system models for dependability-critical systems and then automatically generate dynamic fault trees (DFT) for comprehensive, tool-supported reliability analysis. Specifically, we use the Architectural Analysis and Design Language (AADL) to model the structural, behavioral and failure aspects of the system in a composite architecture model. From the AADL model, we seek to derive the DFT(s) and use Galileo's automated reliability analyses to estimate system reliability. This approach alleviates the dependability engineering - systems engineering knowledge expertise gap, integrates the dependability and system engineering design and development processes and enables a more formal, automated and consistent DFT construction. We illustrate this work using an example based on a dynamic digital feed-water control system for a nuclear reactor.

Robust Design of a Dynamic System Using a Probabilistic Design Method (확률적 설계 방법을 이용한 동적 시스템의 강건 설계)

  • Ryu, Jang-Hee;Choi, In-Sang;Kim, Joo-Sung;Son, Young-Kap
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.35 no.10
    • /
    • pp.1171-1178
    • /
    • 2011
  • This paper shows the robust design results of an actuator, a kind of dynamic system. Variations in the components comprising the actuator cause uncertainties in the system's dynamic performance. Therefore, a probabilistic design method is applied to ensure robust actuator performance to component variation. A Simulink model for the actuator was built using transfer functions for the components. The dynamic responses of the actuator were evaluated using the Simulink model. Performance indexes were approximated as quadratic functions of the design parameters through the application of the response surface methodology (RSM) with the Simulink model. Then, a probabilistic design method was applied to the approximated performance indexes to obtain optimal design parameters that would provide robust actuator performance. The optimal design was compared to the present design in terms of the performance indexes and dynamic response characteristics over time.

Dynamic optimal design of an anthropomorphic robot manipulator (인체형 로봇 매니퓰레이터의 동역학적 최적설계)

  • 이상헌;이병주;광윤근
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1994.10a
    • /
    • pp.82-87
    • /
    • 1994
  • In this study, dynamic optimal design far a two degree-of-freedom anthropomorphic robot module is performed. Several dynamic design indices associated with the inertia matrix and the inertia power array are introduced. Analysis for the relationship between the dynamic parameters and the design indices shows that trade-offs exist between the isotropy and the dynamic design indices related to the actuator size. A composite design index is employed to deal with multi-criteria based design with different weighting factors, in a systematic manner. We demonstrate the fact that dynamic optimization is another significant step to enhance the system performances, followed by kinematic optimization.

  • PDF

A Study on Static and Dynamic Design Criteria of Piping System in Petrochemical Plant Design (석유화학 플랜트 설계 시 배관계의 정적, 동적 설계기준에 대한 연구)

  • 민선규;최명진
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2001.10a
    • /
    • pp.275-279
    • /
    • 2001
  • There are two kinds of the design criteria of piping system in petrochemical plant design. The first is on static state evaluation by thermal growth and the other is on dynamic evaluation by piping vibration. In the static design evaluation, the ASME B31.3 code defines 7000 cycles of fatigue life in operating the piping system with design condition. However, the dynamic design evaluation in comparative with small displacements of high frequencies to static condition has not established clearly the method, yet. So, this study purposes to present the trial of a proposal of dynamic design criterion on the basis of static design method.

  • PDF

Stabilizing variable structure controller design of helicopter (헬리콥터 자세안정 가변구조제어기 설계)

  • 소일영;임규만;함운철
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1996.10b
    • /
    • pp.1504-1508
    • /
    • 1996
  • In this paper, we derive dynamic equation of helicopter and design controller based on variable structure system. It is difficult to control helicopter because it has non-linear coupling between input and output of system and is MIMO system. The design of control law is considered here using variable structure methodology giving the robustness to parameter variations and invariance to some subsets of external disturbance. However we derive dynamic equations of helicopter and design stabilizing variable structure controller. Also, simulation results are given in this paper.

  • PDF

A Study of Dynamic Characteristics of the 3-Axis Slide System for Tilting Turret (틸팅터릿 3축 이송시스템의 동특성 연구)

  • 정상화;차경래
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 1999.05a
    • /
    • pp.153-158
    • /
    • 1999
  • In the multi-purpose lathe, the design of tilting turret slide system has an important and critical role to enhance the accuracy of the machining process. Tilting turret unit is traveled by 3-axis slide systems. There is a need to design this part very carefully. In this research, the 3-axis slide system with tilting turret unit is modeled and simulated using ADAMS software. The dynamic behavior of this system is visualized by data graphs and dynamic animations. The first step of virtual prototype which makes it possible to design economically and effectively is developed.

  • PDF