Browse Topic: Test procedures
This specification covers a shampoo type carpet cleaner in the form of a liquid
ABSTRACT This paper identifies the failure modes of military track bushings during lab testing and looks at correlation of lab tests failure modes with those found in field testing failures. In an effort to understand and duplicate the failures seen in the field, a track shoe was modified to measure the displacement (magnitude and direction) of the bushing pin relative to the inside diameter of the track shoe bore. Utilizing Hall Effect Technology and a small data acquisition system, test course data was recorded and analyzed. A specially designed bushing test machine, capable of testing the entire track pitch, was also designed and built in order to duplicate the field failure in a laboratory environment
ABSTRACT Program offices and the test community all desire to be more efficient with respect to testing but currently lack the analytical tools to help them fit early subsystem level testing into a framework which allows them to perform assessments at the system level. TARDEC initiated a Small Business Innovative Research (SBIR) effort to develop and deploy a system reliability testing and optimization tool that will quantify the value of subsystem level tests in an overall test program and incorporate the results into system level evaluations. The concept software, named the Army Lifecycle Test Optimization (ALTO) tool, provides not only the optimization capability desired, but also other key features to quickly see the current status, metrics, schedule, and reliability plots for the current test plan. As the user makes changes to the test plan, either by running the optimization or adjusting inputs or factors, the impacts on each of these areas is computed and displayed
ABSTRACT Today’s weapon systems are becoming increasingly complex and usually involve other assets to accomplish their missions. Interdependencies among the weapon system components such as its sensor, sensor subsystems, communications, navigation, etc., are crucial to the System Engineering (SE) design and test process. Inserting the individual weapon system into a larger context of a System-of-Systems (SoS) and Family of Systems (FoS) increases the Test and Evaluation (T&E) complexity exponentially. The ability to readily orchestrate myriad of test conditions and scenario alterations in a SoS/FoS context must be devised to enable the evaluation of alternative designs in order to adapt to future missions, threats, and technologies. This paper will address the coupling of Modeling and Simulation (M&S) and systems engineering to support cost-effective decisions on concept development, technology evaluation, material, doctrine, tactics, combat techniques and force structure. Current
ABSTRACT This paper presents Neya’s efforts in developing autonomous depot assembly and parking behaviors for the Ground Vehicle Systems Center’s (GVSC) Autonomous Ground Re-supply (AGR) program. Convoys are a prime target for the enemy, and therefore GVSC is making efforts to remove the human operators and make them autonomous. However, humans still have to manually drive multiple convoy vehicles to and from their depot parking locations before and after autonomous convoy operations – a time-consuming and laborious process. Neya systems was responsible for the design, development, and testing of the autonomous depot assembly and disassembly behaviors, enabling end-to-end autonomy for convoy operations. Our solution to the problem, including the concept of operations, design, as well as approaches towards testing and validation are described in detail
ABSTRACT Autonomous vehicles provide a unique challenge for simulation to effectively and performantly model due to their system level complexity and the inclusion of autonomy software. This environment is made even more challenging when looking at the interactions of humans in-the-loop with the vehicles and autonomy software and also how to include more simulation in the testing process for Autonomous Vehicles. With the use of a software framework built from a Commercial off the Shelf (COTS) game engine the Ground Vehicle Systems Laboratory demonstrated the feasibility of real-time human, software and hardware in the loop testing of autonomous systems. This approach facilitated the execution of two major events which are described herein. Citation: John Brabbs, Benjamin Haynes, Thomas Stanko, “Using A Gaming Engine for Autonomous Vehicle Modeling and Simulation”, In Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), NDIA, Novi, MI, Aug. 11-13
ABSTRACT This paper describes the role of Modeling and Simulation (M&S) as a critical tool which must be necessarily used for the development, acquisition and testing of autonomous systems. To be used effectively key aspects of development, acquisition and testing must adapt and change to derive the maximum benefit from M&S. We describe how development, acquisition and testing should leverage and use M&S. We furthermore introduce and explain the idea of testable autonomy and conclude with a discussion of the qualities and requirements that M&S needs to have to effectively function in the role that we envision. Citation: J. Brabbs, S. Lohrer, P. Kwashnak, P. Bounker, M. Brudnak, “M&S as the Key Enabler for Autonomy Development, Acquisition and Testing”, In Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), NDIA, Novi, MI, Aug. 13-15, 2019
ABSTRACT The automotive and defense industries are going through a period of disruption with the advent of Connected and Automated Vehicles (CAV) driven primarily by innovations in affordable sensor technologies, drive-by-wire systems, and Artificial Intelligence-based decision support systems. One of the primary tools in the testing and validation of these systems is a comparison between virtual and physical-based simulations, which provides a low-cost, systems-approach testing of frequently occurring driving scenarios such as vehicle platooning and edge cases and sensor-spoofing in congested areas. Consequently, the project team developed a robotic vehicle platform—Scaled Testbed for Automated and Robotic Systems (STARS)—to be used for accelerated testing elements of Automated Driving Systems (ADS) including data acquisition through sensor-fusion practices typically observed in the field of robotics. This paper will highlight the implementation of STARS as a scaled testbed for rapid
ABSTRACT This paper describes the motivation and process taken for developing an acceleration time history that has a shock response spectrum that matches the MIL-STD 810 defined shock response spectrum. The mathematics from the ISO standard 18431-4 are presented, as well as the procedures and graphs from the MIL-STD. The time history is synthesized from a sum of basis-functions, parameterized by variable amplitudes and delays. An optimization routine then modifies an array of these optimization parameters to find a time history that has a shock response spectrum that matches a reference shock response. All figures are presented in Appendix A for clarity. The equations developed and computer code written to perform this task are explained, and the full code is provided in Appendix B. Citation: S. Allen, “Waveform Synthesis for Shock Response Spectrum Replication, Applied To Ground Vehicle Component Testing”, In Proceedings of the Ground Vehicle Systems Engineering and Technology
ABSTRACT High life cycle costs coupled with durability and environmental challenges of tracked vehicles in South West Asia (SWA) have focused R&D activities on understanding failure modes of track components as well as understanding the system impacts on track durability. The durability limiters for M1 Abrams (M1, M1A1, and M1A2) T-158LL track systems are the elastomeric components. The focus of this study is to review test methodology utilized to collect preliminary data on the loading distribution of a static vehicle. Proposed design changes and path forward for prediction of durability of elastomers at the systems level from component testing will be presented
ABSTRACT A unique laboratory suspension testing capability has been developed which, for the first time, enables rapid evaluation of tracked vehicle suspension components. The testing capability was stood up in the Durability Test Lab (DTL) in conjunction with the materials division, both organizations within GVSC. Testing has been ongoing, and the results of that testing are presented, current to the time of publication. Historically, laboratory component testing has been very limited due to the lack of a capability to provide relevant loading conditions. Previous testing capabilities not only were deficient in their vertical speed capability, but more importantly, lacked the ability to apply the corning forces. Further reasoning and details associated with the development of this test system are presented. This capability was developed as part of an ongoing campaign in the materials division of GVSC. The purpose of this campaign is to demonstrate and establish design standards, and
Items per page:
50
1 – 50 of 12727