An Interactive Design Space Supporting Development of Vehicle Architecture Concept Models

2011 ◽  
Author(s):  
Gary Osborne ◽  
Glen Prater ◽  
Rostyslav Lesiv ◽  
David Lamb ◽  
Matthew Castanier
Keyword(s):  
Software Package ◽  
Development Process ◽  
Design Space ◽  
Interactive Design ◽  
Design Work ◽  
Vehicle Architecture ◽  
Detail Design ◽  
Development Cycle ◽  
Analysis Models ◽  
Vehicle Development Process

Due to a lack of suitable analysis tools, automotive engineers are often forced to forego quantitative optimization early in the development process, when fundamental decisions establishing vehicle architecture are made. This lack of tools arises because traditional analysis models require detailed geometric descriptions of components and assembly joints in order to yield accurate results, but this information is simply not available early in the development cycle. Optimization taking place later in the cycle usually occurs at the detail design level, and tends to result in expedient solutions to performance problems that might have been more effectively addressed at the architecture level. Alternatively, late-cycle architecture changes may be imposed, but such modifications are equivalent to a huge optimization cycle covering almost the entire design process, and require discarding the detail design work used originally as the basis of the NVH model. Optimizing at the architecture level can both shorten and improve the results of a vehicle development process. In this paper we describe the requirements and implementation of a user interface for a software package supporting vehicle architecture conceptual design and analysis.

Vehicle Concept Model Abstractions for Integrated Geometric, Inertial, Rigid Body, Powertrain, and FE Analyses

2011 ◽  
Author(s):  
Gary Osborne ◽  
Glen Prater ◽  
Rostyslav Lesiv ◽  
David Lamb ◽  
Matthew Castanier
Keyword(s):  
Rigid Body ◽  
Design Space ◽  
Fuel Efficiency ◽  
Three Dimensional ◽  
Space Representation ◽  
Concept Model ◽  
Vehicle Architecture ◽  
Cad Models ◽  
Analysis Models ◽  
Vehicle Development Process

Vehicle analysis models of any kind have their basis in some type of physical representation of the design domain. Rather than describing three-dimensional continua of a collection of components as is done in detail-level CAD models, an architecture-level abstraction describes fundamental function and arrangement, while capturing just enough physical detail to be used as the basis for a meaningful design space representation and eventually, analyses that permit architecture assessment. The design information captured by the abstractions is available at the very earliest stages of the vehicle development process, so the model itself can function as a “design space for ideas”. In this paper we describe vehicle architecture abstractions appropriate for integrated model extractions suitable for geometric, inertial, rigid body, acceleration, braking, fuel efficiency, structural, and NVH assessments. Additionally, we discuss the requisite level of information required for each analysis type.

Process simulation modeling of phytophagans' influence on the yield of seed fruit crops

2019 ◽  
pp. 138-143
Author(s):  
V. A. Shishkin ◽  
E. P. Rybalkin ◽  
E. B. Balykina
Keyword(s):  
Process Simulation ◽  
Simulation Modeling ◽  
Software Package ◽  
Development Process ◽  
Simulation Models ◽  
Vegetation Period ◽  
Fruit Crops ◽  
Generational Change ◽  
Apple Trees ◽  
Nonlinear Characteristics

Simulation modeling of phytophagans’ influence on the yield of seed fruit crops, in particular apple trees, was carried out. By means of simulation models the importance of phytophagans’ influence at different stages of the vegetation period and the period of fruit ripening was revealed. The software package Matlab was used to build simulation models. As a result, simulation models with nonlinear characteristics were obtained, which maximally reflected the studied processes. The developed models imitate the process of phytophagans’ development. Generation change of pests and all stages of their development are simulated. Their respective numbers are recorded at each stage for all generations. The development process at each stage is modeled by separate subsystems of the simulation model. To simulate the development of one generation of pests, these subsystems are connected by external links. In addition, part of the relationships provides a simulation of generational change. There are a number of input parameters that allow to configure the simulation of the process of changing generations, taking into account the peculiarities of the development of various phytophagans.

Vehicle Thermal Management Simulation Using a Rapid Omni-Tree Based Adaptive Cartesian Mesh Generation Methodology

2004 ◽  
Author(s):  
Kumar Srinivasan ◽  
Z. J. Wang ◽  
Wei Yuan ◽  
Richard Sun
Keyword(s):  
Thermal Management ◽  
Mesh Generation ◽  
Development Process ◽  
Cfd Simulation ◽  
New Method ◽  
Surface Mesh ◽  
Passenger Vehicle ◽  
Traditional Approaches ◽  
Volume Mesh ◽  
Vehicle Development Process

CFD simulation of vehicle under-hood and under-body poses several challenges. Specifically, the complexity of the geometry involved makes the use of traditional mesh generation approaches, based on the boundary-to-interior methodology, impractical and time consuming. The current work presents the use of an interior-to-boundary method wherein the need for creating a ‘water-tight’ surface mesh is not a pre-requisite for volume mesh generation. The application of the new method is demonstrated for an actual passenger vehicle under-hood model with nearly a hundred components. Coupled radiation/convection simulations are performed to obtain the complete airflow and thermal map of the engine compartment. Results are validated with test data. The new method results in significant gains in efficiency over traditional approaches allowing the simulation tool to be used effectively in the vehicle development process.

scholarly journals Survey and Classification of Automotive Security Attacks

Information ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 148 ◽  
Author(s):  
Florian Sommer ◽  
Jürgen Dürrwang ◽  
Reiner Kriesten
Keyword(s):  
Development Process ◽  
Autonomous Driving ◽  
Security Attacks ◽  
Security Testing ◽  
Automotive Systems ◽  
Threat Analysis ◽  
Development Phases ◽  
Attack Surface ◽  
Vehicle Development Process

Due to current development trends in the automotive industry towards stronger connected and autonomous driving, the attack surface of vehicles is growing which increases the risk of security attacks. This has been confirmed by several research projects in which vehicles were attacked in order to trigger various functions. In some cases these functions were critical to operational safety. To make automotive systems more secure, concepts must be developed that take existing attacks into account. Several taxonomies were proposed to analyze and classify security attacks. However, in this paper we show that the existing taxonomies were not designed for application in the automotive development process and therefore do not provide enough degree of detail for supporting development phases such as threat analysis or security testing. In order to be able to use the information that security attacks can provide for the development of security concepts and for testing automotive systems, we propose a comprehensive taxonomy with degrees of detail which addresses these tasks. In particular, our proposed taxonomy is designed in such a wa, that each step in the vehicle development process can leverage it.

ERMM: An Engineering Requirements Management Method

2003 ◽  
Author(s):  
Beverly Becker ◽  
Nanxin Wang
Keyword(s):  
Product Development ◽  
Development Process ◽  
Large Body ◽  
Requirements Management ◽  
Complex Process ◽  
Entire Vehicle ◽  
Standards And Regulations ◽  
Management Method ◽  
Vehicle Development Process

Automotive product development is a lengthy and complex process. There exists a large body of various requirements, standards, and regulations, which need to be followed by all engineering activities throughout the entire vehicle development process. The underlying relationships between these requirements are very complicated. Although most of engineering requirements can be found in various engineering databases, it is the lack of the underlying relationship between the requirements and their association with the design that makes it extremely difficult for even experienced engineers to follow the requirements in their dayto-day work. This paper introduces an Engineering Requirements Management Method (ERMM) that captures these interrelationships and associations using a matrix-based representation. A case study with a real automotive component is also presented.

Supporting the Ideation Process and Representation of the Design of a Product as Part of a Real Life Use Process

2012 ◽  
Author(s):  
Eliab Z. Opiyo
Keyword(s):  
Development Process ◽  
Low Cost ◽  
Real Life ◽  
Product Development Process ◽  
Design Stage ◽  
Effective Solution ◽  
Early Design Stage ◽  
The Past ◽  
Detail Design ◽  
Main Challenge

Numerous virtual and physical prototyping techniques have been developed in the past decades. These techniques are typically used for prototyping of products in the embodiment and detail design phases of the product development process, without taking into consideration the processes associated with products. These processes include sub-processes related to the operation of the products, interactivity of the product developer or the user with the product, and thinking and manipulative control of humans. The main challenge addressed in this paper is how to conceptualize and communicate ideas about products together with all accompanying processes. We have developed a new concept of abstract prototyping (AP), with the intent to enable the ideation and representation of products or systems as real life processes. In this paper, we present application case studies to demonstrate the applicability of this new concept of abstract prototyping. The preliminary results show that this is indeed the case and prove that process-focused abstract prototyping can be a useful new enabler for design communication. One of the major benefits of the proposed method over the competing approaches such as the application of VR solutions is that it provides a low-cost, but yet effective solution for the challenge of taking into consideration how the product will be used in user’s context or scenario at the very early design stage.

Benefiting Design Even Late in the Development Cycle: Contributions by Human Factors Engineers

1996 ◽  
Vol 40 (5) ◽  
pp. 318-322 ◽  
Author(s):  
Merissa Walkenstein ◽  
Ronda Eisenberg
Keyword(s):  
Experimental Study ◽  
User Interface ◽  
Human Factors ◽  
Graphical User Interface ◽  
User Interfaces ◽  
Late Stage ◽  
Development Process ◽  
Graphical User Interfaces ◽  
Design And Development ◽  
Development Cycle

This paper describes an experimental study that compares a graphical user interface for a computer-telephony product designed without the involvement of a human factors engineer to a redesign of that interface designed with a human factors engineer late in the development cycle. Both interfaces were usability tested with target customers. Results from a number of measures, both subjective and objective, indicate that the interface designed with the human factors engineer was easier to use than the interface designed without the human factors engineer. The results of this study show the benefits of involving human factors engineers in the design of graphical user interfaces even towards the end of a development cycle. However, this involvement is most effective when human factors engineers are included as an integral part of the design and development process even at this late stage in the process.

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