scholarly journals Study on the Formation Control Methods for Multi-Agent Based on Geometric Characteristics

2013 ◽  
Vol 765-767 ◽  
pp. 1928-1931
Author(s):  
Li Li He ◽  
Xiao Chun Lou
Keyword(s):  
Formation Control ◽  
Three Dimensional ◽  
Target Point ◽  
Control Methods ◽  
Agent Based ◽  
Geometric Characteristics ◽  
Specific Direction ◽  
Multi Agent ◽  
Formation Method ◽  
Dimensional Simulation

Multi-agent formation control is the process in which the teams formed by multiple agents move to specific target or specific direction. The formation method of the linear formation and circular formation are given in this paper, based on the geometric characteristics of the formation formed by multi-agent. The process in which 5 agents arrived at the designated target point and formed a linear formation is achieved through simulation; and 4 agents formed a circular formation and cooperated to carry heavy weights. The result of the three-dimensional simulation shows the feasibility of the method to form multi-agent formations in different environments and different tasks.

Inline Pump Internal Flow Characterization for Optimized Diesel Injection

2008 ◽  
Author(s):  
G. Chiatti ◽  
O. Chiavola ◽  
F. Palmieri
Keyword(s):  
Formation Control ◽  
Fuel Injection ◽  
Three Dimensional ◽  
Internal Flow ◽  
Injection Rate ◽  
Local Pressure ◽  
Injection Process ◽  
Flow Characterization ◽  
Dimensional Simulation ◽  
And Performance

The injection process optimization plays a key role in diesel engine development activities, both for pollutant formation control and performance improvement. The present paper focuses on relatively small diesel units, equipped with fully mechanical injection systems; in detail, the considered system layout is based on the use of spring injectors; the amount of delivered fuel is controlled by the positioning of the pump plunger groove. The paper highlights the role of the inline pump and the influence of fuel characteristics on the system operation. By means of a three-dimensional numerical flow study, the behavior of pump fuel passages and delivery valve is simulated. Then, on the basis of the system features, a complete lumped/one-dimensional numerical model is realized, in which the discharge coefficients evaluated through the three-dimensional simulation are employed. Fuel injection rate and local pressure time histories are investigated, paying specific attention to the occurrence of the relevant phenomena in the system components. Obtained results are compared with experimental data.

A three-dimensional multi-agent-based model for the evolution of Chagas’ disease

Biosystems ◽  
2010 ◽  
Vol 100 (3) ◽  
pp. 225-230 ◽  
Author(s):  
Viviane Galvão ◽  
José Garcia Vivas Miranda
Keyword(s):  
Chagas Disease ◽  
Three Dimensional ◽  
Agent Based Model ◽  
Agent Based ◽  
Multi Agent

scholarly journals Combining Distributed Consensus with Robust H∞-Control for Satellite Formation Flying

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 319
Author(s):  
Julian Scharnagl ◽  
Florian Kempf ◽  
Klaus Schilling
Keyword(s):  
Distributed Control ◽  
Formation Control ◽  
Control Method ◽  
Special Focus ◽  
Control Methods ◽  
Consensus Approach ◽  
Distributed Consensus ◽  
Space Applications ◽  
Multi Agent ◽  
Common Goals

Control methods that guarantee stability in the presence of uncertainties are mandatory in space applications. Further, distributed control approaches are beneficial in terms of scalability and to achieve common goals, especially in multi-agent setups like formation control. This paper presents a combination of robust H ∞ control and distributed control using the consensus approach by deriving a distributed consensus-based generalized plant description that can be used in H ∞ synthesis. Special focus was set towards space applications, namely SFF. The presented results show the applicability of the developed distributed robust control method to a simple, though realistic space scenario, namely a spaceborne distributed telescope. By using this approach, an arbitrary number of satellites/agents can be controlled towards an arbitrary formation geometry. Because of the combination with robust H ∞ control, the presented method satisfies the high stability and robustness demands as found e.g., in space applications.

scholarly journals Generating urban structures: A method for urban planning supported by multi-agent systems and cellular automata

2018 ◽  
Author(s):  
Reinhard Koenig
Keyword(s):  
Urban Planning ◽  
Cellular Automata ◽  
Three Dimensional ◽  
Simulation Method ◽  
Multi Agent Systems ◽  
Agent Based ◽  
Generative Process ◽  
Urban Structures ◽  
Urban Patterns ◽  
Multi Agent

This work is based on the concept that the structure of a city can be defined by six basic urban patterns. To enable more complex urban planning as a long-term objective I have developed a simulation method for generating these basic patterns and for combining them to form various structures. The generative process starts with the two-dimensional organisation of streets followed by the parceling of the remaining areas. An agent-based diffusion-contact model is the basis of these first two steps. Then, with the help of cellular automata, the sites for building on are defined and a three-dimensional building structure is derived. I illustrate the proposed method by showing how it can be applied to generate possible structures for an urban area in the city of Munich.

Control of Directed Formations Using Interconnected Systems Stability

2018 ◽  
Vol 141 (4) ◽  
Author(s):  
Pengpeng Zhang ◽  
Marcio de Queiroz ◽  
Milad Khaledyan ◽  
Tairan Liu
Keyword(s):  
Formation Control ◽  
Directed Graphs ◽  
Three Dimensional ◽  
Interconnected Systems ◽  
Control Analysis ◽  
Multi Agent ◽  
Error Dynamics ◽  
The Stability ◽  
Interconnected Nonlinear Systems ◽  
Systems Simulation

This paper deals with the problem of rigid formation control using directed graphs in both two-dimensional (2D) and three-dimensional (3D) spaces. Directed graphs reduce the number of communication, sensing, and/or control channels of the multi-agent system. We show that the directed version of the gradient descent control law asymptotically stabilizes the interagent distance error dynamics of minimally persistent formation graphs. The control analysis begins with a (possibly cyclic) primitive formation that is grown consecutively by Henneberg-type insertions, resulting at each step in two interconnected nonlinear systems, which are recursively analyzed using the stability of interconnected systems. Simulation and experimental results are presented for the directed formation controller in comparison to the standard undirected controller.

Multi-Agent Systems in Three-Dimensional Protein Structure Prediction

2017 ◽  
pp. 241-278 ◽  
Author(s):  
Leonardo de Lima Corrêa ◽  
Márcio Dorn
Keyword(s):  
Protein Structure ◽  
Protein Structure Prediction ◽  
Structure Prediction ◽  
Protein Structures ◽  
Three Dimensional ◽  
Multi Agent Systems ◽  
Agent Based ◽  
Agent Systems ◽  
Tertiary Protein Structure ◽  
Multi Agent

Tertiary protein structure prediction in silico is currently a challenging problem in Structural Bioinformatics and can be classified according to the computational complexity theory as an NP-hard problem. Determining the 3-D structure of a protein is both experimentally expensive, and time-consuming. The agent-based paradigm has been shown a useful technique for the applications that have repetitive and time-consuming activities, knowledge share and management, such as integration of different knowledge sources and modeling of complex systems, supporting a great variety of domains. This chapter provides an integrated view and insights about the protein structure prediction area concerned to the usage, application and implementation of multi-agent systems to predict the protein structures or to support and coordinate the existing predictors, as well as it is advantages, issues, needs, and demands. It is noteworthy that there is a great need for works related to multi-agent and agent-based paradigms applied to the problem due to their excellent suitability to the problem.

Sign in / Sign up

Export Citation Format

Share Document