Controlling Concurrent Change - A Multiview Approach Toward Updatable Vehicle Automation Systems

The development of SAE Level 3+ vehicles [{SAE}, 2014] poses new challenges not only for the functional development, but also for design and development processes. Such systems consist of a growing number of interconnected functional, as well as hardware and software components, making safety design increasingly difficult. In order to cope with emergent behavior at the vehicle level, thorough systems engineering becomes a key requirement, which enables traceability between different design viewpoints. Ensuring traceability is a key factor towards an efficient validation and verification of such systems. Formal models can in turn assist in keeping track of how the different viewpoints relate to each other and how the interplay of components affects the overall system behavior. Based on experience from the project Controlling Concurrent Change, this paper presents an approach towards model-based integration and verification of a cause effect chain for a component-based vehicle automation system. It reasons on a cross-layer model of the resulting system, which covers necessary aspects of a design in individual architectural views, e.g. safety and timing. In the synthesis stage of integration, our approach is capable of inserting enforcement mechanisms into the design to ensure adherence to the model. We present a use case description for an environment perception system, starting with a functional architecture, which is the basis for componentization of the cause effect chain. By tying the vehicle architecture to the cross-layer integration model, we are able to map the reasoning done during verification to vehicle behavior

SIMULATION OF ELECTRIC AND HYBRID VEHICLES IN A VEHICLE SIMULATOR BASED ON A DETAILED PHYSICAL MODEL, FOR THE PURPOSE OF HMI EVALUATION

In this article, we propose a software solution to study HMI of electric and hybrid electric vehicles in vehicle simulators. We will start with the description of a development process of a physical model for HEV simulation in IGNITE software and equation-based language Modelica. A short introduction to the language, its possibilities, and explanation, why it is more suitable for the development of such models (vehicle powertrain), are presented in the first part of the article. A fusion mechanism of the physical engine with the model by means of FMU (Functional Mock-up Interface) is also described in this part The second part is dedicated to the description of the model constructed in third party software IGNITE. This model has a detailed calculation of energy consumption and energy flow based on the selected control strategy. The last part of the article describes a possible experiment methodology

Flight Simulator Model Integration for Supporting Pilot-in-the-Loop Testing in Model-Based Rotorcraft Design

Model-Based Design (MBD) enables iterative design practices and boosts the agility of the air vehicle development programs. Flight simulators are extensively employed in these programs for evaluating the handling qualities of the designed platforms. In order to keep up with the agility provided by the MBD, integration of the air vehicle models in fairly complex flight simulators needs to be addressed. The AVES Software Development Kit (SDK), which is the simulation software suite of DLR Air Vehicle Simulator (AVES), enables tackling the model integration starting from the modeler’s desktop. Additionally, 2Simulate, which is the enabling real-time simulation infrastructure of AVES SDK, provides automated model integration workflow for MATLAB/Simulink models using Simulink Coder code generation facilities. This paper presents the successful employment of AVES SDK and the 2Simulate model integration workflow for addressing integration challenges for Pilot-in-the-Loop Testing in AVES

Managed Evolution of Automotive Software Product Line Architectures: A Systematic Literature Study

The rapidly growing number of software-based features in the automotive domain as well as the special requirements in this domain ask for dedicated engineering approaches, models, and processes. Nowadays, software development in the automotive sector is generally developed as product line development, in which major parts of the software are kept adaptable in order to enable reusability of the software in different vehicle variants. In addition, reuse also plays an important role in the development of new vehicle generations in order to reduce development costs. Today, a high number of methods and techniques exist to support the product line driven development of software in the automotive sector. However, these approaches generally consider only partial aspects of development. In this paper, we present an in-depth literature study based on a conceptual model of artifacts and activities for the managed evolution of automotive software product line architectures. We are interested in the coverage of the particular aspects of the conceptual model and, thus, the fields covered in current research and research gaps, respectively. Furthermore, we aim to identify the methods and techniques used to implement automotive software product lines in general, and their usage scope in particular. As a result, this in-depth review reveals that none of the studies represent a holistic approach for the managed evolution of automotive software product lines. In addition, approaches from agile software development are of growing interest in this field

Complex approach to computations and analysis of vehicle dynamics

The goal of this article is to present a method for vehicle dynamics development based on multibody system approach in combination with real vehicle testing and data analysis. Described technique consists of two multibody models with the same level of complexity. First direct multibody model of the complete vehicle is suitable mainly for sensitivity analysis. The other inverse multibody model is used for real vehicle dynamic states reconstruction from measured data. Results of these two models are then post-processed and visualized together in a custom-made data analysis software

Supporting Early Modeling and End-to-end Timing Analysis of Vehicular Distributed Real-Time Applications

REACTION 2012. 1st International workshop on Real-time and distributed computing in emerging applications. December 4th, 2012, San Juan, Puerto Rico.The current model- and component-based development approaches for automotive distributed real-time systems have non-existing, or limited, support for modeling network traffic originating from outside the vehicle, i.e., vehicle-tovehicle, vehicle-to-infrastructure, and cloud-based applications. We present novel modeling and analysis techniques to allow early end-to-end timing analysis of distributed applications based on their models and simple models of network traffic that originates from outside of the model. As a proof of concept, we implement these techniques in the existing industrial tool suite Rubus- ICE which is used for the development of software for vehicular embedded systems by several international companies. We also conduct an application-case study to validate our techniques.This work is supported by the Swedish Knowledge Foundation (KKS) within the project FEMMVA. We thank the industrial partners Arcticus Systems, BAE Systems Hägglunds and Volvo Construction Equipment (VCE), Sweden

Perancangan Bodi Kendaraan Prototype Arrow Concept sebagai Media Pembelajaran Mata Kuliah Konstruksi Badan Kendaraan

AbstrakPenelitian bertujuan untuk melakukan perancangan bodi kendaraan Prototype Arrow Concept sebagai media dalam pembelajaran mata kuliah Konstruksi Badan Kendaraan. Jenis penelitian adalah research and development (R&D) dengan model planning production and evaluation (PPE). Perancangan dan simulasi dilakukan dengan bantuan software Solidworks. Simulasi dalam penelitian menggunakan material fiber karbon atau carbon fiber. Teknik pengumpulan data menggunakan observasi dan pengujian simulasi menggunakan software Solidworks. Teknik analisis data menggunakan analisis deskriptif. Berdasarkan hasil penelitian, diperoleh velocity yang baik dalam mengatur kecepatan udara, dapat menerima pressure dengan baik, dan mendapatkan nilai coefficient drag (Cd) atau gaya hambat yang rendah. Berdasarkan hasil penelitian, disimpulkan bahwa nilai yang diperoleh dari pengembangan bodi kendaraan hemat energi Prototype Arrow Concept sudah memenuhi standar dan layak diproduksi sebagai media dalam pembelajaran mata kuliah Konstruksi Badan Kendaraan. AbstractThe research aimed to develop an energy efficient vehicle body Prototype Arrow Concept in learning Vehicle Body Construction. This type of research was research and development (R&D) with a planning production and evaluation (PPE) model. Design and simulation were done with the help of Solidworks software. Simulations in research used carbon fiber materials. Data collection techniques used observation and simulation testing used Solidworks software. Data analysis technique used descriptive analysis. Based on the research results, good velocity was obtained in adjusting airspeed, can receive pressure well, and gets a drag coefficient (Cd) or low drag. Based on the results of the research, it was concluded that the value obtained from the development of the energy-efficient vehicle body of Prototype Arrow Concept met the standards and was feasible to be produced as an instructional media of Vehicle Body Construction courses