scholarly journals Save Maritime Systems Testbed

2014 ◽  
Vol 21 (1) ◽  
pp. 19-34
Author(s):  
André Bolles ◽  
Axel Hahn
Keyword(s):  
New Technologies ◽  
Physical World ◽  
Maritime Transportation ◽  
System Specification ◽  
Test Bed ◽  
Physical Test ◽  
Sociotechnical System ◽  
Modelling Framework ◽  
In Situ Experiments ◽  
Simulation Based

Abstract‘Safe voyage from berth to berth’ — this is the goal of all e-navigation strains, driven by new technologies, new infrastructures and new organizational structures on bridge, on shore as well as in the cloud. To facilitate these efforts suitable engineering and safety/risk assessment methods have to be applied. Understanding maritime transportation as a sociotechnical system allows system engineering methods to be applied. Formal and simulation based verification and validation of e-navigation technologies are important methods to obtain system safety and reliability. The modelling and simulation toolset HAGGIS provides methods for system specification and formal risk analysis. It provides a modelling framework for processes, fault trees and generic hazard specification and a physical world and maritime traffic simulation system. HAGGIS is accompanied by the physical test bed LABSKAUS which implements a reference port and waterway. Additionally, it contains an experimental Vessel Traffic Services (VTS) implementation and a mobile integrated bridge enabling in situ experiments for technology evaluation, testing, ground research and demonstration. This paper describes an integrated seamless approach for developing new e-navigation technologies starting with virtual simulation based assessment and ending in physical real world demonstrations.

Simulation Environment for Risk Assessment of E-Navigation Systems

2015 ◽  
Author(s):  
Axel Hahn
Keyword(s):  
Risk Assessment ◽  
New Technologies ◽  
Organizational Structures ◽  
Physical World ◽  
Maritime Transportation ◽  
Navigation Systems ◽  
Test Bed ◽  
Physical Test ◽  
Sociotechnical System ◽  
Simulation Based

“Safe voyage from berth to berth”: This is the goal of all e-Navigation strains, driven by new technologies, new infrastructures and new organizational structures on bridge, on shore as well as in the cloud. To facilitate these efforts suitable engineering and safety/risk assessment methods are required. Understanding maritime transportation as a sociotechnical system allows the usage of system-engineering methods. Simulation based test beds for verification and validation of e-Navigation technologies are important methods to obtain functional safety and reliability [1]. The modelling and simulation toolset HAGGIS is a co-simulation system for evaluation of e-Navigation concepts and systems. It provides a maritime traffic simulator and a physical world (n-body) simulator and services for finding rare events of failures. HAGGIS is accompanied by the physical test bed LABSKAUS which implements a reference port and waterways. This paper describes an integrated and seamless approach for developing new e-Navigation technologies starting with virtual simulation based safety assessment and ending in physical real world demonstrations. It gives an overview of the actual test bed and introduces requirements, concepts and elements of HAGGIS and LABSKAUS, which are joined in the eMIR test bed.

scholarly journals A research port test bed based on distributed optical sensors and sensor fusion framework for ad hoc situational awareness

2017 ◽  
Vol 6 (1) ◽  
pp. 37-52 ◽  
Author(s):  
Nick Rüssmeier ◽  
Axel Hahn ◽  
Daniela Nicklas ◽  
Oliver Zielinski
Keyword(s):  
Optical Sensors ◽  
Ad Hoc ◽  
New Technologies ◽  
Situational Awareness ◽  
Sensor Data ◽  
Test Bed ◽  
Remote Communication ◽  
Efficient Test ◽  
In Situ Experiments ◽  
Assistant Systems

Abstract. Maritime study sites utilized as a physical experimental test bed for sensor data fusion, communication technology and data stream analysis tools can provide substantial frameworks for design and development of e-navigation technologies. Increasing safety by observation and monitoring of the maritime environment by new technologies meets forward-looking needs to facilitate situational awareness. Further, such test beds offer a solid basis for standardizing new technologies to advance growth by reducing time to market of up-to-date industrial products and technologies. Especially optical sensor technologies are well suited to provide a situational and marine environmental assessment of waterways for (i) online detection of relevant situations, (ii) collection of data for further analysis and (iii) reuse of data, e.g. for training or testing of assistant systems. The test bed set-up has to consider maintainability, flexibility and extensibility for efficient test set-ups. This means that new use cases and applications within the test bed infrastructure, here presented by a research port, can be easily developed and extended by installing new sensors, actuators and software components. Furthermore, the system supports reliable remote communication between onshore and offshore participants. A series of in situ experiments at the research port of Bremerhaven and in other maritime environments were performed, representing applications and scenarios to demonstrate the capability for the proposed system framework and design.

scholarly journals Multi-Perspective Modeling of Healthcare Systems

2017 ◽  
Vol 5 (2) ◽  
pp. 1-20 ◽  
Author(s):  
Ignace Djitog ◽  
Hamzat Olanrewaju Aliyu ◽  
Mamadou Kaba Traoré
Keyword(s):  
Specific Problem ◽  
Discrete Event ◽  
Healthcare Systems ◽  
Proof Of Concept ◽  
System Specification ◽  
Disease Propagation ◽  
Dynamic Update ◽  
Event System ◽  
Simulation Based

This paper presents a multi-perspective approach to Modeling and Simulation (M&S) of Healthcare Systems (HS) such that different perspectives are defined and integrated together. The interactions between the isolated perspectives are done through dynamic update of models output-to-parameter integration during concurrent simulations. Most often, simulation-based studies of HS in the literature focus on specific problem like allocation of resources, disease propagation, and population dynamics that are studied with constant parameters from their respective experimental frames throughout the simulation. The proposed idea provides a closer representation of the real situation and helps to capture the interactions between seemingly independent concerns - and the effects of such interactions - in simulation results. The article provides a DEVS (Discrete Event System Specification)-based formalization of the loose integration of the different perspectives, an Object-Oriented framework for its realization and a case study as illustration and proof of concept.

Design and implementation of a test bed for building controls

2019 ◽  
Vol 40 (6) ◽  
pp. 758-766 ◽  
Author(s):  
Siddharth Goyal ◽  
Weimin Wang ◽  
Michael R Brambley
Keyword(s):  
Pacific Northwest ◽  
National Laboratory ◽  
Pacific Northwest National Laboratory ◽  
Control Algorithms ◽  
Test Bed ◽  
Physical Test ◽  
The Pacific ◽  
Automation Systems ◽  
Advanced Controls ◽  
Lighting Systems

Advanced controls play an essential role toward the improvement of building operational efficiency and the integration of responsive loads in buildings for grid services. Ideally, control algorithms must be sufficiently tested and validated before they are applied on real systems. This paper presents the development and current state of such an evolving test bed to support and enable experiments on advanced controls for buildings. The test bed presented in this paper consists of nine operating buildings—which possess various types of equipment and systems having different control systems and communication mechanisms (e.g., media and protocols) used in building automation systems—on the Pacific Northwest National Laboratory campus. The test bed architecture is developed in such a way that (1) it supports interactions among the buildings and heterogeneous building components and systems, including both virtual and physical devices, e.g., heating, ventilating, and air-conditioning and lighting systems; (2) it can be easily reconfigured for different control topologies and methodologies, e.g., centralized and distributed; (3) it allows selection of communication protocols, communication media, and computation resources; and (4) it is part of a larger cyber-physical test bed that includes both physical and virtual assets on distributed renewable generation, energy storage, and power system assets. Practical application: The test bed presented in this paper can be used by industry to develop and evaluate the performance of advanced control algorithms on real systems for buildings and buildings-to-grid applications. This provides practitioners an opportunity to test the applications and modify them accordingly based on their use cases and selection criteria, e.g., a controller modulating the temperature in a hospital will have different criterion as compared to an office building.

Simulation-Based Evaluation of Advanced Traveler Information Systems

2005 ◽  
Vol 1910 (1) ◽  
pp. 90-98 ◽  
Author(s):  
Ramachandran Balakrishna ◽  
Haris N. Koutsopoulos ◽  
Moshe Ben-Akiva ◽  
Bruno M. Fernandez Ruiz ◽  
Manish Mehta
Keyword(s):  
Information Systems ◽  
Dynamic Network ◽  
Evaluation Methodology ◽  
Design Parameters ◽  
Route Guidance ◽  
Test Bed ◽  
Advanced Traveler Information Systems ◽  
Traveler Information ◽  
Traveler Information Systems ◽  
Simulation Based

Traveler information has the potential to reduce travel times and improve their reliability. Studies have verified that driver overreaction from the dissemination of information can be eliminated through prediction-based route guidance that uses short-term forecasts of network state. Critical off-line tests of advanced dynamic traffic assignment–based prediction systems have been limited, since the system being evaluated has also been used as the test bed. This paper outlines a detailed simulation-based laboratory for the objective and independent evaluation of advanced traveler information systems, a laboratory with the flexibility to analyze the impacts of various design parameters and modeling errors on the quality of the generated guidance. MITSIMLab, a system for the evaluation of advanced traffic management systems, is integrated with Dynamic Network Assignment for the Management of Information to Travelers (DynaMIT), a simulation-based decision support system designed to generate prediction-based route guidance. Evaluation criteria and requirements for the closed-loop integration of MITSIMLab and DynaMIT are discussed. Detailed case studies demonstrating the evaluation methodology and sensitivity of DynaMIT's guidance are presented.

Bat Noseleaves as an Inspiration for Smart Emission Baffle Structures

2013 ◽  
Author(s):  
Anupam K. Gupta ◽  
Yanqing Fu ◽  
Dane Webster ◽  
Rolf Müller
Keyword(s):  
Computer Animation ◽  
Degrees Of Freedom ◽  
Free Field ◽  
Shape Features ◽  
Test Bed ◽  
Physical Test ◽  
Current Form ◽  
Local Shape ◽  
Old World ◽  
Horseshoe Bats

Baffle shapes are commonly used in engineered devices to interface sound sources with the free field. Examples are acoustic horns seen in megaphones and horn-loaded loudspeakers. Typical for these devices are simple, static shapes that serve primarily an impedance-matching function. Diffracting baffles linked to a sound source are also common in the biosonar system of bats. In particular in bat groups that emit their ultrasonic pulses nasally, the nostrils are always surrounded by some baffle shape. This is the case across several large and diverse bat families such as horseshoe bats (Rhinolophidae), Old World leaf-nosed bats (Hipposideridae), and New World leaf-nosed bats (Phyllostomidae). However, biosonar baffles differ from their technical counterparts in two important ways: They typically have a much greater geometrical complexity and they are capable of non-rigid shape changes over time. Although simple horn shapes can be found in the noseleaves of many bat species, they are rarely as plain and regular as in megaphones and other technical applications of acoustical horns. Instead, the baffles are broken up into several parts that are frequently augmented with intricate local shape features such as ridges, furrows, and spikes. Furthermore, we have observed that in species belonging to the horseshoe bats and the related Old World leaf-nosed bats these local shape features are often not static, but can undergo displacements as well as non-rigid deformations. At least some of these dynamic effects are not passive byproducts of e.g., sound production or exhalation, but due to specific muscular actuation that can be controlled by the animals. To study these intricate, dynamic baffles as inspirations for smart structures, we have recreated the degrees of freedoms that Old World leaf-nosed bats have in deforming their noseleaves in a digital model using computer animation techniques. In its current form, our model has 6 degrees of freedom that can be used to test interactions between different motions using actuation patterns that occur in life as well as patterns that have not been observed, but could aid understanding. Because of the high-dimensional parameter space spanned by the different degrees of freedom, a high-performance computing platform has been used to characterize the acoustic behavior across a larger number of deformed no seleaf shapes. A physical test bed is currently under construction for implementing baffle motions that have been found to result in interesting changes of the acoustic device characteristics and could hence be of use to engineering applications.

In-the-Loop Simulation Based on the Test Bed of Automotive Steer-by-Wire System

2014 ◽  
Vol 705 ◽  
pp. 142-145
Author(s):  
Wen Ming Yu
Keyword(s):  
Steering System ◽  
System Structure ◽  
Test Bed ◽  
Qualitative Simulation ◽  
Simulation Based ◽  
Steer By Wire ◽  
Working Principle ◽  
Simulation Results ◽  
Wire System

Automotive steer-by-wire system uses electronic signaling to transfer the command and causes the motor-driven steering. It can improve the maneuverability and stability of the driver steering. This article first discussed the car-by-wire steering system structure and working principle. Then, it builds the in-the-loop simulation based on the test bed of automotive steer-by-wire system. Moreover, this paper researches the test bad design of the automotive steer-by-wire system. The operation module controller is designed based on the of the automotive steer-by-wire system. At last, we can find out the qualitative simulation results.

scholarly journals A measurement-based verification framework for UK greenhouse gas emissions: an overview of the Greenhouse gAs Uk and Global Emissions (GAUGE) project

2018 ◽  
Vol 18 (16) ◽  
pp. 11753-11777 ◽  
Author(s):  
Paul I. Palmer ◽  
Simon O'Doherty ◽  
Grant Allen ◽  
Keith Bower ◽  
Hartmut Bösch ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
New Technologies ◽  
Density Measurement ◽  
Point Sources ◽  
Estimation Methods ◽  
Test Bed ◽  
Magnitude Distribution ◽  
Atmospheric Data ◽  
The Uk ◽  
Global Emissions

Abstract. We describe the motivation, design, and execution of the Greenhouse gAs Uk and Global Emissions (GAUGE) project. The overarching scientific objective of GAUGE was to use atmospheric data to estimate the magnitude, distribution, and uncertainty of the UK greenhouse gas (GHG, defined here as CO2, CH4, and N2O) budget, 2013–2015. To address this objective, we established a multi-year and interlinked measurement and data analysis programme, building on an established tall-tower GHG measurement network. The calibrated measurement network comprises ground-based, airborne, ship-borne, balloon-borne, and space-borne GHG sensors. Our choice of measurement technologies and measurement locations reflects the heterogeneity of UK GHG sources, which range from small point sources such as landfills to large, diffuse sources such as agriculture. Atmospheric mole fraction data collected at the tall towers and on the ships provide information on sub-continental fluxes, representing the backbone to the GAUGE network. Additional spatial and temporal details of GHG fluxes over East Anglia were inferred from data collected by a regional network. Data collected during aircraft flights were used to study the transport of GHGs on local and regional scales. We purposely integrated new sensor and platform technologies into the GAUGE network, allowing us to lay the foundations of a strengthened UK capability to verify national GHG emissions beyond the project lifetime. For example, current satellites provide sparse and seasonally uneven sampling over the UK mainly because of its geographical size and cloud cover. This situation will improve with new and future satellite instruments, e.g. measurements of CH4 from the TROPOspheric Monitoring Instrument (TROPOMI) aboard Sentinel-5P. We use global, nested, and regional atmospheric transport models and inverse methods to infer geographically resolved CO2 and CH4 fluxes. This multi-model approach allows us to study model spread in a posteriori flux estimates. These models are used to determine the relative importance of different measurements to infer the UK GHG budget. Attributing observed GHG variations to specific sources is a major challenge. Within a UK-wide spatial context we used two approaches: (1) Δ14CO2 and other relevant isotopologues (e.g. δ13CCH4) from collected air samples to quantify the contribution from fossil fuel combustion and other sources, and (2) geographical separation of individual sources, e.g. agriculture, using a high-density measurement network. Neither of these represents a definitive approach, but they will provide invaluable information about GHG source attribution when they are adopted as part of a more comprehensive, long-term national GHG measurement programme. We also conducted a number of case studies, including an instrumented landfill experiment that provided a test bed for new technologies and flux estimation methods. We anticipate that results from the GAUGE project will help inform other countries on how to use atmospheric data to quantify their nationally determined contributions to the Paris Agreement.

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