检索结果-南通市图书馆

Maneuvering Modeling and Simulation of AUV Dynamic Systems with Euler-Rodriguez Quaternion Method

China Ocean Engineering 2013年第3期27卷 403-416页

作者： C.W.Chen J.S.Kouh J.F.Tsai Department of Science Engineering and Ocean Engineering National Taiwan University

The purpose of this study is to develop maneuvering models and systems of a simulator to improve the motion performance of autonomous underwater vehicles （AUVs） at the preliminary design stages in advance. The AUVs simulation systems based on the standard submarine equations of motion in six-degree-of-freedom （6-DOF） integrated with the Euler-Rodriguez quaternion method for representing singularity-free AUV attitude and time-saving calculation, and with a nonlinear control model for maneuvering and depth control simulations, time-marching in the fourth-order Runge-Kutta scheme. For validation of the simulation codes, results of the ISiMI AUV open-loop tests including turning test and zigzag test as well as an AUV simulator on the basis of Euler-angle method were used to compare with the quaternion-based AUV simulator. The computational results from the proposed simulator agree well with those from both the ISiMI AUV experiments and the Euler-angle based simulations. Additionally, a new maneuvering procedure, namely ＂put-out＂ was implemented to test directional stability for a large-scale AUV in the proposed AUV simulator that can be considered for vehicles in space as well as in constrained planes.

关键词： autonomous underwater vehicle (.4 UV) Euler-Rodriguez quaternion hydrodynamics maneuvering systemdynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modeling the dynamics of innovation ecosystems

引用

International Journal of Innovation Studies 2023年第2期7卷 142-158页

作者： Jaakko Paasi Henri Wiman Tina Apilo Katri Valkokari VTT Technical Research Centre of Finland Ltd. P.O.Box 1000FI-02044VTTFinland

Demand for solving systemic problems has resulted in the need for new forms of ***,the concept of innovation ecosystem has *** are intrinsically more fluid than networks,which set ups the need to understand and orchestrate the internal dynamics of innovation ecosystem in order to have successful innovation *** dynamics of ecosystems,however,is not well *** this paper the dynamics of innovation ecosystems has been studied by applying the methodology of system *** purpose of the study is to support the creation of innovation ecosystems and the orchestration of existing ecosystems so that they could be more *** factors generating dynamics in innovation ecosystems were *** form the elements of the system dynamics model of innovation *** causal loop structure between the model elements indicates how the key factors of dynamics influence the outcome of ecosystem.

关键词： Ecosystem Innovationecosystem Open innovation systemdynamics Modeling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

COMPLEX ECO-ECONOMY SYSTEM

引用

Journal of Systems Science & Complexity 2003年第2期16卷 145-158页

作者： Pawel Bartoszczuk Yoshiteru Nakamori School of Knowledge Science Japan Advanced Institute of Science and Technology 1-1 AsahidaiTatsunokuchi Ishikawa 923-1292 Japan

In the past there were a lot of researches on the topic of economic growth. Nevertheless, the environment has been a bit abstracted by standard economics. Scarce natural resources and our choices to protect them or exploit them jointly determine the economic and environmental systems. In this paper we describe a model with a particular focus on the relationship among income, pollution, and non-renewable resources. We want to combine both economic and environmental sectors. The system dynamics approach is used in analyzing these complex relationships. This paper gives an insight into the possibilities for replacing non-renewable resources with more renewable ones. Next, we present the simulation runs of the model that are conducted with the help of existing system dynamics modeling tools. Only the relationships simulated so far between the variables ought to be put under yet more cautious examination.

关键词： environmental systems modeling nonlinear systems simulation systemdynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：