scholarly journals GROUND VEHICLE DRIVING AIDS: ASSESSING DRIVER WORKLOAD AND PERFORMANCE IN DEGRADED VISUAL ENVIRONMENTS

2019 ◽  
Author(s):  
Kayla Riegner
Keyword(s):  
Ground Vehicle ◽  
Driver Workload ◽  
And Performance

scholarly journals Ground Vehicle Driving Aids: Assessing Driver Workload and Performance in Degraded Visual Environments

2018 ◽  
Vol 62 (1) ◽  
pp. 1838-1842
Author(s):  
Kayla L. Riegner ◽  
Jennifer Ammori ◽  
Brian E. O’Hearn ◽  
Kelly S. Steelman
Keyword(s):  
Warning System ◽  
Threat Detection ◽  
Ground Vehicle ◽  
Driver Performance ◽  
Driver Workload ◽  
And Performance ◽  
Flow Enhancer ◽  
Speed Accuracy ◽  
Display Systems ◽  
Accuracy Tradeoff

To enable indirect-driving maneuverability and threat detection in degraded visual environments (DVE), TARDEC’s ground DVE program is developing and testing a range of sensors and driver aid display systems. The current paper presents the first in a series of three simulator studies. It examined driver performance with two of the candidate driving aids, the Lane/Road Departure Warning System (LRDWS) and Optic Flow Enhancer (OFE), in three levels of degraded visual environment. Results indicated that the LRDWS best supported drivers in degraded visual environments, eliciting the lowest workload ratings and highest system usability ratings and facilitating faster driving in severe DVE conditions, with no apparent speed-accuracy tradeoff.

Acceleration-Based Remaining Life Prognostics for Terrain-Loaded Components on an Army Ground Vehicle System

2009 ◽  
Vol 52 (2) ◽  
pp. 40-49 ◽  
Author(s):  
Richard Heine ◽  
Donald Barker
Keyword(s):  
Department Of Defense ◽  
Remaining Life ◽  
Ground Vehicle ◽  
Wheeled Vehicle ◽  
Vehicle System ◽  
Acceleration Sensors ◽  
And Performance ◽  
Critical Components ◽  
The Military ◽  
Wheeled Vehicles

Use of a health and usage monitoring system (HUMS) is one method the Department of Defense is investigating to meet conflicting cost and performance goals for Army wheeled vehicles. One area where a HUMS would be of great benefit is monitoring critical components vulnerable to terrain-induced fatigue. While strain is typically the desired input to a fatigue model, acceleration sensors are less susceptible to damage from the military ground vehicle environment and provide more reliable data over long periods of usage. The feasibility of using vibratory inputs from an accelerometer to make component fatigue predictions for a military wheeled vehicle system is explored in this study, and the use of limited subsets of data for algorithm training are evaluated. An example component is used to demonstrate that the proposed HUMS algorithms are appropriate and provide suitably accurate fatigue predictions.

Autonomous Real-Time Monitoring of Crops in Controlled Environment Agriculture

2019 ◽  
Author(s):  
Saba Faryadi ◽  
Mohammadreza Davoodi ◽  
Javad Mohammadpour Velni
Keyword(s):  
Image Processing ◽  
Real Time ◽  
Directed Graphs ◽  
Controlled Environment ◽  
Real Time Monitoring ◽  
Collection System ◽  
Image Processing Algorithm ◽  
Ground Vehicle ◽  
Controlled Environment Agriculture ◽  
And Performance

Abstract In this work, we develop a system that can be used for real-time monitoring of multiple important areas in controlled environment agriculture (and in particular greenhouses) using an autonomous ground vehicle (AGV). To model the greenhouse layout, as well as the tasks that should be accomplished by the AGV, we generate two weighted directed graphs. Based on those graphs, an algorithm is then proposed for finding the optimal (in the sense of traveled distance) trajectory of the vehicle with the goal of precisely monitoring important areas in the greenhouse. Furthermore, a data collection system and image processing algorithm is proposed and implemented so that the vehicle: (i) can capture images and detect changes that have occurred on the crops in real time, and (ii) construct (if needed) a map of the plant rows, when arriving at each one of the important areas. Based on this work, the images can either be stitched onboard the vehicle and then sent to a server or be sent directly to the server and then processed (stitched) there. Both simulation and experimental results are provided to demonstrate the effectiveness and performance of the proposed system.

A novel platoon topology and performance analysis with cloud brain control center for multi-functional unmanned ground vehicle

2021 ◽  
pp. 095440702110407
Author(s):  
Yue Zhao ◽  
Jun Ni ◽  
Jibin Hu
Keyword(s):  
Intelligent Transportation System ◽  
Controller Design ◽  
Stable Operation ◽  
Ground Vehicles ◽  
Control Center ◽  
Ground Vehicle ◽  
Controller Gain ◽  
Simulation Based ◽  
And Performance ◽  
The Given

Unmanned ground vehicles (UGVs) are of great significance to the development of Intelligent Transportation System (ITS). The UGVs are supposed to serve a large number of missions with multiple functions in civilian use. Therefore, it requires UGV to be grouped as a platoon to complete the given missions. A novel platoon topology, Vehicle-Cloud Bidirectional Leader (VCBDL), is proposed in this paper to provide the basement for the group control of multi-functional UGVs. The VCBDL topology takes consideration of a cloud brain control center, which is capable of analyzing and making autonomous decisions for the UGVs. In order to realize the stable operation of the platoon with VCBDL topology, this paper analyzes the design of the platoon controller based on the graph theory method and obtains the range of controller gain. The robustness of the running platoon is analyzed and the convergence range of the platoon robustness index is defined. The above conclusions are verified by simulation based on the control of the police-used patrol UGV. The simulation results demonstrate the effectiveness of controller design, and the robustness performance is investigated by simulated random platoon disturbance. In addition, the experiments with real shuttle UGVs testbeds platoon are performed to verify the performance of the proposed controller.

On Wind-Driven Land Vehicles

2016 ◽  
Author(s):  
G. Reina ◽  
M. M. Foglia
Keyword(s):  
Wind Energy ◽  
Autonomous Navigation ◽  
Feasible Solution ◽  
Thrust Force ◽  
Front Wheel ◽  
Alternative Source ◽  
Ground Vehicle ◽  
Land Vehicles ◽  
And Performance ◽  
Wind Intensity

This paper deals with the study of a land-yacht, that is a ground vehicle propelled by wind energy. There is a large interest in exploring alternative source of energy for propulsion and wind energy could be a feasible solution being totally green, available and free. The idea envisaged by a land-yacht is that of using one or several flexible or rigid vertical wing-sails to produce a thrust-force, which can eventually generate a higher travel velocity than its prevailing wind. A model of a three-wheel land-yacht is presented capturing the main dynamic and aerodynamic aspects of the system behaviour. Simulations are included showing how environment conditions, i.e. wind intensity and direction, influence the vehicle response and performance. In view of a robotic embodiment of the vehicle, a controller of the sail trim angle and front wheel steer angle is also discussed for autonomous navigation.

Integration of Functional Circuits into FDM Parts

2014 ◽  
Vol 1038 ◽  
pp. 29-33 ◽  
Author(s):  
Alissa Wild
Keyword(s):  
Electrically Conductive ◽  
Ground Vehicle ◽  
Electronic Circuitry ◽  
Ink Jet ◽  
3D Printers ◽  
3D Printed ◽  
And Performance ◽  
Plastic Parts ◽  
Thermoplastic Resins ◽  
Design Freedom

The incorporation of electronic circuitry into additively manufactured thermoplastic parts is a highly desirable innovation enabler. Applications include embedding signal traces into custom air or ground vehicle components, creation of complex interconnect devices exploiting the design freedom of 3D printers, or as a way to create various grounding, shielding, sensing or antenna patterns on custom structures. Stratasys has explored multiple approaches for creating selective metallization on 3D printed plastic parts. Earlier publications [1] described evaluations of metal-based ink deposition methods such as ink jet and aerosol jet. More recently we have explored the use of Laser Direct Structuring, (LDS) thermoplastic resins in our 3D printers. With LDS technology, parts are selectively metallized after 3D part build through a laser imaging and electroless plating process. Finally, some early feasibility work has been attempted using inherently electrically conductive materials. In this paper, the various methods evaluated for integration of metal traces with 3D parts will be discussed, along with part examples and performance comparisons.

The Use of Modeling and Simulation in Ground Vehicle Analysis

2001 ◽  
Author(s):  
Michael D. Letherwood ◽  
David D. Gunter
Keyword(s):  
Life Cycle ◽  
Modeling And Simulation ◽  
Dynamic Performance ◽  
Ground Vehicles ◽  
Reform Initiatives ◽  
Ground Vehicle ◽  
Acquisition Strategies ◽  
Simulation Based ◽  
Acquisition Reform ◽  
And Performance

Abstract In support of Department of Defense (DOD) mandated acquisition reform initiatives to reduce vehicle related life cycle costs and timelines, the Tank-automotive and Armaments Research, Development and Engineering Center (TARDEC) is using simulation-based acquisition strategies to investigate the dynamic performance of wheeled and tracked ground vehicles. These strategies are used throughout the vehicle development, testing, and fielding life cycle process. The paper will describe how modeling and simulation (M&S) is applied to answer a wide variety of design and performance evaluation questions. It will also depict a series of simulation-based engineering projects that build on the Army’s simulation investments as a tool to investigate and answer real-world vehicle design, acquisition, and engineering support questions.

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