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- 검색키워드
- 주제어 : acausal modeling (검색결과 4 건)
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ACAUSAL MODELING METHOD AND ITS VERIFICATION OF ENGINE CYCLE SIMULATION FOR EMISSIONS PREDICTION
Norifumi Mizushima,Mitsuharu Oguma 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.2
In recent years, acausal modeling languages such as Modelica and VHDL-AMS have been used for model- based development. In this research, a cycle simulation model using an acausal modeling language for predicting the emissions of an internal combustion engine was developed for application to a vehicle simulation model for energy and emissions analysis. In order to develop simulation models with higher versatility and extensibility using an acausal modeling language, it is necessary to design the structure and hierarchy by understanding its rules and constraints. Hence, the modeling method of the engine cycle simulation using the acausal modeling language Modelica for emissions prediction was discussed. Furthermore, nitrogen oxide emissions were calculated using the developed model, and their accuracy was validated by comparison with experimental data on a spark ignition engine.
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JMAAB Plant Modeling Guidelines and Vehicle Architecture
Akira Ohata,Satoshi Komori 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Plant Modeling Working Group (PM-WG) of Japan MATLAB® Automotive Advisory Board (JMAAB) developed “lant Modeling Guidelines using MATLAB®”with the collaboration of automotive companies and released the guidelines accompanied by a sample vehicle model in 2008. They recommend the vehicle model architecture and how to draw vehicle models with the good portability and readability. PM-WG has introduced a new capability called Two-Way-Connection (TWC) into SIMULINK® which allows us to draw models with the intuitive physical image assembling parts. The sample model was constructed based on TWC. The guidelines intend to be referenced in other plant modeling tools because TWC can be a bridge between a tool based on causal modeling (signal flow or data flow mechanism) and another tool based on recent acausal modeling with connection mechanism.
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비인과적 비행 시뮬레이션 프로그램 개발과 개념설계에의 응용
진재현,백승길 한국기계기술학회 2015 한국기계기술학회지 Vol.17 No.3
Flight dynamic simulation programs are useful to estimate dynamic performances of an aircraft and to develop flight control laws. Usually, simulation programs were developed by the causal programming method which required a distinct relationship between inputs and outputs. Recently, a new approach, acausal programming, has been developed and applied in many fields to deal with the disadvantages of causal simulation programs. The authors have developed a flight dynamic simulation program by using Modelica which is an acausal programming language. The developed program has been tested by several simulations for attitude and velocity hold control. It has been shown that servo systems for control surfaces can be designed by this program. The level of detail of models can be easily increased by using the library of Modelica. The simulation program can be used to develop unmanned aerial vehicles and rotor crafts.
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비인과적 비행 시뮬레이션 프로그램 개발과 개념설계에의 응용
진재현,백승길 한국기계기술학회 2015 한국기계기술학회지 Vol.17 No.3
Flight dynamic simulation programs are useful to estimate dynamic performances of an aircraft and to develop flight control laws. Usually, simulation programs were developed by the causal programming method which required a distinct relationship between inputs and outputs. Recently, a new approach, acausal programming, has been developed and applied in many fields to deal with the disadvantages of causal simulation programs. The authors have developed a flight dynamic simulation program by using Modelica which is an acausal programming language. The developed program has been tested by several simulations for attitude and velocity hold control. It has been shown that servo systems for control surfaces can be designed by this program. The level of detail of models can be easily increased by using the library of Modelica. The simulation program can be used to develop unmanned aerial vehicles and rotor crafts.
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