Advanced Materials Research Vol. 1036

Abstract: Increased focus on reducing CO₂ emissions has created growing interest in CO₂ capture from industrial processes for storage in underground formations. New technical solutions, costs and energy requirements for ship-based transport of CO₂ are presented. All elements in the transport chain, namely liquefaction, storage, loading system, dedicated CO₂ ship (s), onshore loading and unloading, and offshore unloading systems are included in the paper. Over 80 % from the primary energy consumed all over the world is obtained from fossil oil and natural gas. The last researches have shown the energy dependences of these types of fuels. The transition to the economy based on the low influence of the carbon, the carbon capture technology, is the main means to reconsider the fossil fuels for meeting the needs for reduction of negative emissions. This is necessary for keeping the world temperature at normal levels. The main target of this paper is to put highlight the negative effect of CO₂ emissions and the interest in recovery of carbon dioxide from flue gases trough multiple factors: the merchant CO₂ market, renewed interest in enhanced oil recovery, and the desire to reduce greenhouse gas emissions. It also takes in account modalities of transport and storage of CO₂. Solutions for CO₂ capture and injection into caverns instead of natural deposits were found worldwide. These solutions are not applicable however all over the world and they are not a priority in the environment protection activity.Another important aspect calls for all merchant ships requirements regarding CO₂ emissions through index calculation and development of Management Plan. Also, to increase the control of CO₂ it would be useful to identify the caverns where it is possible to deposit the CO₂, to build new special ship for CO2 transport or replace natural deposits through CO₂ injection.

Abstract: In a previous work, we proposed a Method of Moments (MoM) approach for decomposition of a complex displacement into elementary movements. We found a good agreement between our results, based on application of the proposed approach on data from an inertial navigation system, and the results obtained by simply integrating the instantaneous acceleration. In this paper, we assess the accuracy of our method, in order to evaluate the impact of the number of the basis functions.

Abstract: Feature is one of the methods for representing objects from which are representing components, products and processes. This article presents methods for integration of features of methods in modeling and analysis of composite structural components. The aim of the research is to develop methods for verification and validation of composite layered structure, distinguishing components of the individual layers and identify the relationship between them. By applying the method of features it is possible to determine the structure of the composite fit to the requirements of design and construction. Proposed new types of feature, which allows the creation of object-oriented structures of composite components.

Abstract: This paper presents the combined application of Artificial Neural Networks and the RULA method in the process of redesign ergonomic workstations.Artificial Neural Networks excel in gathering difficult non-linear relationships between the inputs and outputs of a system. We used, in this work, a feed forward neural network in order to ranking a workstation. The neural network is simulated with a simple simulator: SSNN. The design experiment presented in this paper was realized at University of Pitesti, at the Faculty of Mechanics and Technology, Technology and Management Department, using CATIA V5 software.

Abstract: The paper presents the method of describing the conception of a future technical mean basing on the method of functional features. In order to determine the attributes which should characterize the functional features for the description of the conception of a technical mean it has been analyzed the different stages of the design-constructional-manufacturing process. Basing on the review of literature it was supposed the structure of the design-constructional-manufacturing process which includes the following stages: the need determination, designing, constructing, manufacturing and exploitation. In the process of designing-constructing-manufacturing one can distinguish models associated with each of its stages, and namely: the model related to designing (a conception), the model related to constructing (a construction), the model related to planning, the model related to manufacturing. The most important from mentioned models, in the terms of description of the conception of a technical mean, is the model related to the designing sub-process. It was assumed that the model related to the designing sub-process should include such information as: the structure of the system of a future technical mean (system of conjugations and transformations relationships), the design solutions of components of a technical system associated with the transformations relations, the design solutions of connections between components of s technical system mapping the established conjugations relationships between elements.

Abstract: The paper presents the method basing on engineering knowledge and experience for aiding the design process of hexapods. The method proposed by the authors uses the architecture of a hybrid system, which combines an advisory system and the CBR (Case Based Reasoning) method. The paper includes the formalized description of the developed method and presents the system functioning on the example of the design process of hexapods.

Abstract: The paper presents the method basing on engineers knowledge and experience for aiding the process of designing module manipulators. The method, proposed by the authors, is based on the CBR method (Case Based Reasoning). CBR is a method of problem solving that bases on the searching for analogies (similarities) between a currently solved design task, and earlier cases, that adequately described, are stored in a computer memory. The paper presents the algorithm and formalized description of the developed method. It has been also presented its scope, and method of functioning are illustrated on the example of the designing module manipulators.

Abstract: The paper presents an original method to enhance the productivity of the design activity based on a dimensioning stage which integrates information from various sources: tabular data, diagrams, experimental data and others. The integration of such data in an analytic way is based on an original data processor which interpolates data and outputs diagrams, and outputs information regarding the laws of variation expressed as comma separated values data files, as well as automatically generated source code libraries in C++, Java and MATHLAB/GNU Octave. This automatically generated code is optimized in terms of execution time and it was verified in several applications. The data processor allows the user to visually verify the output data accuracy. The paper also presents some of the applications of the data processor: automatic design, method to enhance the accuracy of computer based calculus for both analytic and numerical methods, conversion of the discontinuous experimental data into laws of variation and experimental data processing in applied elasticity. There are several directions of future research, such as: a more general mathematical approach, development of a more general computer based instrument with increased flexibility and accuracy. Also, a complex software for applied elasticity calculi based on the results of the data processor is under development. Implementation of these applications in commercial CAD/CAE applications is another direction of research.

Abstract: The paper presents the specific approach to the designing process. This approach bases on the concept of integrated designing taking into consideration the three main attributes and three main subsystems of each technical mean. The attributes describing the features of an optimal technical mean include: the geometric form (including the mutual relations), the material form (including macroscopic and microscopic structure) and the assembly form (so called the dynamic form representing the constructional features obtaining only in the assembly process). The three specified constructional subsystems are: the structural subsystem (representing the main system of carrying and functional elements), the drive subsystem (representing the drives, actuators and energy sources) and the control subsystem (representing the sensors, controllers, signal buses and informations subsystem). Optimally linking mentioned attributes it is possibly to obtain the optimal design solution. It corresponds to certain approaches in mechatronics design understood as creating the system of specified subsystems (including the mechanical one and the electric one). In the presented work will be described the formal aspects of the integrated approach in the designing process. They will be also illustrated the practical results of introducing the proposed approach. These results are considered with the possibility of application the sophisticated tools of analysis like multi-agents theory. It is also possible to show the consequences of this approach for the CAD/CAE process. The integrated approach creates the theoretical platform for these informatics solutions. Finally one should point out the possibility of linking, in one designing process, informatics tools considered with designing and analysis of control subsystem.

Abstract: The experts of industrial design field consider the product early design stage as one of the most important stage of the design process, because it influences all stages of the product life cycle. One of the capital questions for manufacturing or design engineering people is how simple or elaborated work piece to use for a given part, in a specific set of production conditions. The optimization problem consists of the choosing of the right work piece for the current production conditions. In many cases this problem is solved empirically, based on the experience of the manufacturer. This approach leads to results that are situated more or less close to the optimum for the technical and economical point of view. Fuzzy logic is a method that is used in system control and analysis design, because it shortens the time for engineering development and sometimes, in the case of highly complex systems, is the only way to solve the problem. For the parts manufacturing, the main idea of the algorithm is to formalize the knowledge regarding production volume, loading conditions and other factors, using fuzzy sets and then to take the work piece choosing decision through the inference rules that are specified to fuzzy logic methodology. The described fuzzy logic algorithm allows a rapid, argued choosing of the work piece type in the production. The paper describes the method implementation for the manufacturing of gears, including the description of the software results and their interpretation.