Distributed Moving Base Driving Simulators

Distributed Moving Base Driving Simulators
Author :
Publisher : Linköping University Electronic Press
Total Pages : 60
Release :
ISBN-10 : 9789176850909
ISBN-13 : 9176850900
Rating : 4/5 (09 Downloads)

Synopsis Distributed Moving Base Driving Simulators by : Anders Andersson

Development of new functionality and smart systems for different types of vehicles is accelerating with the advent of new emerging technologies such as connected and autonomous vehicles. To ensure that these new systems and functions work as intended, flexible and credible evaluation tools are necessary. One example of this type of tool is a driving simulator, which can be used for testing new and existing vehicle concepts and driver support systems. When a driver in a driving simulator operates it in the same way as they would in actual traffic, you get a realistic evaluation of what you want to investigate. Two advantages of a driving simulator are (1.) that you can repeat the same situation several times over a short period of time, and (2.) you can study driver reactions during dangerous situations that could result in serious injuries if they occurred in the real world. An important component of a driving simulator is the vehicle model, i.e., the model that describes how the vehicle reacts to its surroundings and driver inputs. To increase the simulator realism or the computational performance, it is possible to divide the vehicle model into subsystems that run on different computers that are connected in a network. A subsystem can also be replaced with hardware using so-called hardware-in-the-loop simulation, and can then be connected to the rest of the vehicle model using a specified interface. The technique of dividing a model into smaller subsystems running on separate nodes that communicate through a network is called distributed simulation. This thesis investigates if and how a distributed simulator design might facilitate the maintenance and new development required for a driving simulator to be able to keep up with the increasing pace of vehicle development. For this purpose, three different distributed simulator solutions have been designed, built, and analyzed with the aim of constructing distributed simulators, including external hardware, where the simulation achieves the same degree of realism as with a traditional driving simulator. One of these simulator solutions has been used to create a parameterized powertrain model that can be configured to represent any of a number of different vehicles. Furthermore, the driver's driving task is combined with the powertrain model to monitor deviations. After the powertrain model was created, subsystems from a simulator solution and the powertrain model have been transferred to a Modelica environment. The goal is to create a framework for requirement testing that guarantees sufficient realism, also for a distributed driving simulation. The results show that the distributed simulators we have developed work well overall with satisfactory performance. It is important to manage the vehicle model and how it is connected to a distributed system. In the distributed driveline simulator setup, the network delays were so small that they could be ignored, i.e., they did not affect the driving experience. However, if one gradually increases the delays, a driver in the distributed simulator will change his/her behavior. The impact of communication latency on a distributed simulator also depends on the simulator application, where different usages of the simulator, i.e., different simulator studies, will have different demands. We believe that many simulator studies could be performed using a distributed setup. One issue is how modifications to the system affect the vehicle model and the desired behavior. This leads to the need for methodology for managing model requirements. In order to detect model deviations in the simulator environment, a monitoring aid has been implemented to help notify test managers when a model behaves strangely or is driven outside of its validated region. Since the availability of distributed laboratory equipment can be limited, the possibility of using Modelica (which is an equation-based and object-oriented programming language) for simulating subsystems is also examined. Implementation of the model in Modelica has also been extended with requirements management, and in this work a framework is proposed for automatically evaluating the model in a tool.

Extensions for Distributed Moving Base Driving Simulators

Extensions for Distributed Moving Base Driving Simulators
Author :
Publisher : Linköping University Electronic Press
Total Pages : 39
Release :
ISBN-10 : 9789176855249
ISBN-13 : 9176855244
Rating : 4/5 (49 Downloads)

Synopsis Extensions for Distributed Moving Base Driving Simulators by : Anders Andersson

Modern vehicles are complex systems. Different design stages for such a complex system include evaluation using models and submodels, hardware-in-the-loop systems and complete vehicles. Once a vehicle is delivered to the market evaluation continues by the public. One kind of tool that can be used during many stages of a vehicle lifecycle is driving simulators. The use of driving simulators with a human driver is commonly focused on driver behavior. In a high fidelity moving base driving simulator it is possible to provide realistic and repetitive driving situations using distinctive features such as: physical modelling of driven vehicle, a moving base, a physical cabin interface and an audio and visual representation of the driving environment. A desired but difficult goal to achieve using a moving base driving simulator is to have behavioral validity. In other words, A driver in a moving base driving simulator should have the same driving behavior as he or she would have during the same driving task in a real vehicle.". In this thesis the focus is on high fidelity moving base driving simulators. The main target is to improve the behavior validity or to maintain behavior validity while adding complexity to the simulator. One main assumption in this thesis is that systems closer to the final product provide better accuracy and are perceived better if properly integrated. Thus, the approach in this thesis is to try to ease incorporation of such systems using combinations of the methods hardware-in-the-loop and distributed simulation. Hardware-in-the-loop is a method where hardware is interfaced into a software controlled environment/simulation. Distributed simulation is a method where parts of a simulation at physically different locations are connected together. For some simulator laboratories distributed simulation is the only feasible option since some hardware cannot be moved in an easy way. Results presented in this thesis show that a complete vehicle or hardware-in-the-loop test laboratory can successfully be connected to a moving base driving simulator. Further, it is demonstrated that using a framework for distributed simulation eases communication and integration due to standardized interfaces. One identified potential problem is complexity in interface wrappers when integrating hardware-in-the-loop in a distributed simulation framework. From this aspect, it is important to consider the model design and the intersections between software and hardware models. Another important issue discussed is the increased delay in overhead time when using a framework for distributed simulation.

Cavalry Drill Manual

Cavalry Drill Manual
Author :
Publisher :
Total Pages : 248
Release :
ISBN-10 : NYPL:33433081877510
ISBN-13 :
Rating : 4/5 (10 Downloads)

Synopsis Cavalry Drill Manual by : New Zealand. Army

Halftime

Halftime
Author :
Publisher : Zondervan
Total Pages : 210
Release :
ISBN-10 : 9780310215325
ISBN-13 : 0310215323
Rating : 4/5 (25 Downloads)

Synopsis Halftime by : Bob Buford

Bob Buford's Halftime shows how men can make their middle years a time of transformation toward a more satisfying -- and significant -- life.

Chambers's Journal

Chambers's Journal
Author :
Publisher :
Total Pages : 902
Release :
ISBN-10 : UTEXAS:059172131286455
ISBN-13 :
Rating : 4/5 (55 Downloads)

Synopsis Chambers's Journal by :

Clean Your Cleats

Clean Your Cleats
Author :
Publisher : Dan Blewett
Total Pages : 270
Release :
ISBN-10 : 9798519737623
ISBN-13 :
Rating : 4/5 (23 Downloads)

Synopsis Clean Your Cleats by : Dan Blewett

What Does it Take to Have a Great Baseball Career? You daydream about one day seeing your face on a baseball card. You live for pressure and the green grass beneath your cleats. But as your career progresses, the game gets harder. You slump and struggle. You get injured and overlooked. Your confidence plummets. Can you keep improving? Are your big dreams still within reach? A Handbook for the Dedicated Player Clean Your Cleats is filled with stories and advice learned the hard way, over a long career on the diamond. Develop better routines and improve your consistency. Handle the ups and downs with confidence and resolve. Strengthen relationships with teammates, parents and coaches. Learn mindset strategies to become the best version of you. Dan Blewett, in this practical guide, helps players understand all the little things in baseball that make a huge difference over a long career. Why clean your cleats? Because every detail matters.

Robotics Research

Robotics Research
Author :
Publisher : Springer Science & Business Media
Total Pages : 650
Release :
ISBN-10 : 9781447110217
ISBN-13 : 1447110218
Rating : 4/5 (17 Downloads)

Synopsis Robotics Research by : Georges Giralt

This publication covers all the topics which are relevant to Advanced Robotics today, ranging from Systems Design to Reasoning and Planning. It is based on the Seventh International Symposium on Robotics Research held in Germany on October, 21 - 24th, 1995. The papers were written by specialists in the field from the United States, Europe, Japan, Australia and Canada. The editors, who also chaired this symposium, present the latest research results as well as new approaches to long standing problems. Robotics Research is a contribution to the emerging concepts, methods and tools that shape Robotics. The papers range from pure research reports to application-oriented studies. The topics covered include: manipulation, control, virtual reality, motion planning, 3D vision and industrial systems' issues.

Of Gods and Mortals

Of Gods and Mortals
Author :
Publisher : Bloomsbury Publishing
Total Pages : 113
Release :
ISBN-10 : 9781780968513
ISBN-13 : 1780968515
Rating : 4/5 (13 Downloads)

Synopsis Of Gods and Mortals by : Andrea Sfiligoi

Two armies prepare for war. Thor, surrounded by crackling lightning, leads the assault of a horde of Viking berserkers. Preparing to receive this charge stands a wall of grim-faced, determined Spartan hoplites, commanded by Ares himself... Of Gods and Mortals is a skirmish wargame that gives players the opportunity to command the greatest heroes, warriors and monsters of legend – and the gods and goddesses that ruled over them. Whether you want to lead the forces of Greek, Egyptian, Celtic or Norse mythology to battle, or build your own pantheon, Of Gods and Mortals presents everything you need. Each player takes control of a god, a handful of legendary characters and a number of mortal troops, forming a warband that must work in harmony to succeed. Although the gods are incredibly powerful, they are only as strong as the faith of the mortals who follow them – if their worshippers are cut down, gods become weaker, and if a deity is vanquished in combat, its followers may flee the field of battle. Success lies in employing a strategy that uses all your troops, from the mightiest to the most humble, as effectively as possible.