Now showing items 21-40 of 63

    • A LESSON IN CONFLICT MITIGATION: INTEGRATING DIVERGENT DESIGN PHILOSOPHIES

      Kosbar, Kurt; Mormile, Melanie; Brinker, Katelyn R.; Marcolina, Rebecca C.; Missouri University of Science and Technology (International Foundation for Telemetering, 2016-11)
      The Mars Rover Design Team is dedicated to building a next generation rover that will one day assist astronauts in the field. The complexity of such a project increases when the two conflicting design philosophies of agile software development and traditional waterfall development must work in tandem in order to design and construct a rover within a year. Agile software development promotes the flexible, testdriven production of coinciding design aspects, while the waterfall design philosophy relies on thorough planning and rigid, sequential design schedules. The project managers of the team work to balance these opposing philosophies by fostering individual interests, allowing team members to select their own focus areas within a wide variety of mission critical tasks. This practice accelerates the design and construction of the rover and in turn creates the momentum needed to achieve a common goal while consolidating both agile software and traditional waterfall development.
    • ON FREQUENCY OFFSET COMPENSATION FOR EQUALIZED SOQPSK

      Rice, Michael; Ravert, Jeffrey; Brigham Young University (International Foundation for Telemetering, 2016-11)
      This paper describes the use of a phase lock loop (PLL) to compensate for and remove a residual frequency offset when using data-aided estimators to equalize SOQPSK-TG. The problems of multipath and residual frequency offset will be shown my example. An equalizer followed by a PLL will be shown to be a viable option to mitigate multipath and residual frequency offset by example.
    • A LIDAR-BASED NAVIGATION SYSTEM FOR THE VISUALLY IMPAIRED

      Kosbar, Kurt; Miles, Michael; Jetter, Joshua; Missouri University of Science and Technology, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2016-11)
      A common issue faced by people who are visually impaired is the difficulty of navigating and traveling through unfamiliar outdoor and indoor environments. The current state-of-the-art solutions to this problem consist of very expensive guide dogs and simple canes for obstacle detection. The team sought to develop a LIDAR-based navigation system with binaural auditory feedback that would allow the blind to navigate in unfamiliar environments and perform basic obstacle avoidance. Though basic auditory feedback relating to environmental obstacles was developed, further work is necessary to fine-tune the system and to determine the practicality of the device.
    • ROTARY-WING FLIGHT TESTS TO DETERMINE THE BENEFITS OF FREQUENCY AND SPATIAL DIVERSITY AT THE YUMA PROVING GROUND

      Diehl, Michael; Swain, Jason; Wilcox, Tab; Air Combat Systems Directorate (International Foundation for Telemetering, 2016-11)
      The United States (U.S.) Army Yuma Proving Ground (YPG) conducted a series of rotary-wing flight tests for the sole purpose of checking out Telemetry data link instrumentation. Four flights were conducted at YPG in February 2016 that built upon an earlier test flight conducted in June 2015. The most recent iteration of testing examined the benefits of frequency diversity on aircraft and the spatial diversity of receiving sites using existing hardware at YPG. Quantitative analysis from those flight results will be presented and include discussion on how results will affect future mission operations at YPG.
    • TELEMETRY SYSTEM FOR REALTIME MONITORING OF AN OFFROAD RACECAR

      Marcellin, Michael; Boyer, Kyle; Brubaker, Laura; Everly, Kyle; Herriman, RIchard; Sackett, Mark; Tran, Huy; Univ Arizona, Dept Elect & Comp Engn (International Foundation for Telemetering, 2016-11)
      The University of Arizona Baja racing team competes annually in a grueling fourhour offroad endurance race which subjects vehicles to an array of obstacles such as jumps, boulders, and mud bogs. This paper examines the telemetering system created by the UA Baja Team to monitor a range of critical aspects of the car with the goal of detecting and identifying possible mechanical failures and areas with potential for improvement. Running on an Arduino Mega, the system stores all gathered data to an SD card and transmits it back to the pit wirelessly for realtime analysis.
    • FIBER BRAGG GRATING SENSOR SYSTEM FOR MONITORING COMPOSITE AEROSPACE STRUCTURES

      Shengnan, Geng; Xinglai, Wang; Hui, Feng; Beijing Institute of Astronautical Systems Engineering (International Foundation for Telemetering, 2016-11)
      To investigate strain-sensitive characteristics of fiber Bragg grating (FBG) sensors, a minimal sensing system consisting of multiplex FBG sensors and signal demodulating and processing instruments was constructed. FBG sensors were designed with different package structures for respectively sensing strain or temperature parameters, and they returned measurand-dependent wavelengths back to the interrogation system for measurement with high resolution. In this paper, tests were performed on structure samples with step-wise increase of deformations. Both FBG sensing system and strain gages were tested and compared. Experimental work proved that the FBG sensing system had a good level of accuracy in measuring the static response of the tested composite structure. Moreover the additional advantages such as damp proofing, high sampling rates and real-time inspection make the novel system especially appropriate for load monitoring and damage detection of aerospace structures.
    • Software Defined Radio MIMO Telemetry Transmitter

      Kosbar, Kurt; Becker, Brandon; Bennett, Charles; Missouri University of Science and Technology, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2016-11)
      This paper describes the development of a small, low-cost, and flexible telemetry transmitter that can be used for multiple-input multiple-output (MIMO) communication systems. In the intended application, the transmitter will collect data from sensors on small quad copters or drones, regarding the vehicle’s attitude, location, movement, and other flight data. This will be combined into a single data stream, and base-band modulation applied by a field programmable gate array (FPGA). The FPGA output will control a separate RF modulation board, which will generate a pair of RF signals suitable for use in a 2x2 MIMO system. The original application uses the 902- 928MHz ISM band. The modulation format can be altered by changing the software for the FPGA.
    • FOCUSED AUTOMATED DISCOVERY OF TELEMETRY DEVICE CONSTRAINTS

      Whittington, Austin J.; Youngs, Alexander G.; Harwell, John R.; Moodie, Myron L.; Southwest Research Institute (International Foundation for Telemetering, 2016-11)
      Configuring typical devices in the telemetry community requires the creation of complex, device-specific configuration files. While the grammar of the configuration files is vendor neutral, the device specific details are vendor specific. Thus, a naïve approach to building these files is to construct a file, test it against a device, and then iterate. The specification sheets (and other documents) for the device can serve as a guide, but the details of flight test configuration possibilities are immense and, in this community, typically not fully documented. This paper describes a process of creating a set of general rules describing characteristics of a configuration file and using those rules to discover the configuration constraints of telemetry devices automatically. The discovered constraints posed by a particular vendor’s device can then be quickly formed into a correct-by-construction constraint-based grammar for use in other systems.
    • Protecting Telemetry Data from Compromise Learning from the Mistakes of the Breached!

      Kalibjian, Jeff; Hewlett Packard Enterprise (International Foundation for Telemetering, 2016-11)
      Information has value and as such any network based computer (whether that network touches the Internet or not) has the potential to be hacked. Telemetry data is not immune to the threat. While there are a myriad of security sensor and analytics tools available for entities to deploy in order to protect their IT networks and assets on those networks, sometimes overlooked is also the wealth of research data available regarding the etiology of breaches that reveal fascinating, sometimes counterintuitive insights in the best ways to configure and integrate security applications to protect the organization. After reviewing the latest research data regarding computer and IT network compromise, security strategies implied in the research data appropriate to the security challenges encountered in the telemetry post processing environment will be thoroughly examined providing tangible methodologies that may be employed to better protect organization telemetry post processing and IT infrastructures.
    • TELEMETRY RECONSTRUCTION AND ANALYSIS USING VIRTUAL REALITY

      Verges, Katherine; Graham, Richard; NSWC Corona Division (International Foundation for Telemetering, 2016-11)
      Currently, telemetry analysis is visually disconnected from the system being analyzed; analysts look at a series of two dimensional functions plotted over time that represent everything that happens. As the digital age continues to evolve and grow, a new technology is emerging in the world of entertainment: Virtual Reality (VR). VR describes a system that uses a headset to create a completely manufactured environment for the user to utilize and explore. This technology can be harnessed in order to translate raw telemetry data into an all-inclusive image of a system being analyzed in a 3-dimensional (3D) format. It would allow an analyst to fully visualize results and better understand what is occurring and has the potential to remove some of the subjectivity that comes with analyzing functions in order to help scientists and engineers to more efficiently improve their products. VR technology could be applied in a variety of fields-- defense, medicine, biology, and many more—and could help pave the way to technical advancements for a better world.
    • AUTONOMOUS MAPPING

      Marcellin, Michael W.; Deputy, Xander; Fox, Kevin; Meyer, Christopher; Mitts, Cody; Wang, Jiaxiang; Univ Arizona, Dept Elect & Comp Engn (International Foundation for Telemetering, 2016-11)
      This paper describes an autonomous platform that can map an indoor single-floor environment in two spatial dimensions. The design uses the Simultaneous, Localization, and Mapping (SLAM) algorithm, which utilizes inertial measurement unit (IMU), microcontroller unit (MCU), and a 360-degree laser scanner to autonomously maneuver and generate a building floor plan accessible by the user.
    • LIGHTWEIGHT REAL-TIME DISPLAY TOOL - USING OPEN SOURCE SOFTWARE

      Ferrill, Micha; Avionics Test & Analysis Corporation (International Foundation for Telemetering, 2016-11)
      This paper will present our work developing a lightweight real-time display tool using opensource technologies. Specifically, the effort involves receiving data broadcast over UDP (User Datagram Protocol) from an IRIG 106 Chapter 10 compliant recorder and then selecting specific data elements for display within a web browser. A small processing engine written in Python runs the data collection and processing while a small web server also written in Python provides data values for display. The web browser portion utilizes an open-source JavaScript plotting library to display values in real time.
    • A CASE STUDY OF HIGH-VOLUME AUTOMATED TESTING WITHIN THE NASA SPACE NETWORK

      Irvin, Dana; Lokshin, Kirill; Puri, Amit; Ingenicomm, Inc. (International Foundation for Telemetering, 2016-11)
      The NASA Space Network (SN), which consists of the geosynchronous Tracking and Data Relay Satellite (TDRS) constellation and its associated ground elements, is a critical national space asset that provides near-continuous, high-bandwidth telemetry, command, and communications services for numerous spacecraft and launch vehicles. SN sustainment activities frequently involve testing of the numerous interfaces within the SN ground segment. To reduce the cost and complexity of such testing, NASA commissioned the development of the External Bearer Interface Test Set (XBIT), which enables ground interface verification using a high-volume test automation framework. This paper considers the use of the XBIT as a case study of automated ground segment verification and validation. The paper discusses the trade-offs between automated, semiautomated, and interactive ground interface testing and presents comparative test execution metrics to quantify the relative efficiency of these approaches.
    • INKJET PRINTED ANTENNAS

      Marcellin, Michael; Xin, Hao; Hoskins, Charles; Zukova, Alisa; Turnblade, Joel; Shi, Yiming; Burrola, Santiago; Univ Arizona (International Foundation for Telemetering, 2016-11)
      The objective of this design project is to use inkjet printers with conductive ink to print functional antennas. The project is sponsored by the University of Arizona Electrical and Computer Engineering department. The project was completed with a Design of Experiments to determine the best method for printing a working antenna with different printers, inks, substrates, and printing methods. Conductive ink was used with standard inkjet printers to create a twodimensional antenna print, and the final results describe the best method for doing so. This technology is particularly useful because printed antennas may be produced quickly and inexpensively. Some potential applications include creating RFID tags, radio technology, mobile phones, and sensors for aircrafts. The printed antennas are particularly useful for some of these applications due to the size and flexibility of the print.
    • SOME INITIAL RESULTS FOR DATA-AIDED EQUALIZER EXPERIMENTS AT EDWARDS AFB

      Rice, Michael; Hogstrom, Christopher; Nash, Christopher; Ravert, Jeffrey; Cole-Rhodes, Arlene; Moazzami, Farzad; Saquib, Mohammad; Afran, Md. Shah; Perrins, Erik; Temple, Kip; et al. (International Foundation for Telemetering, 2016-11)
      This paper describes the results of flight tests designed to compare data-aided equalization to blind, adaptive equalization using SOQPSK-TG in aeronautical telemetry. The flight tests were conducted on 3 June 2016 at the Air Force Flight Test Center, Edwards AFB, at upper L band (1801.5 MHz) and at C band (4711.5 MHz). Five data-aided equalizers were implemented and compared to a commercially available blind equalizer. In addition, all equalized bit streams were compared to an unequalized reference. The results show that the blind equalizer tends to be either really good or really bad. In contrast, the data-aided equalizers tend to exhibit more graceful degradation. Which equalization method is “best” is not clear as of this writing. The answer depends on a number factors that will become clear as more data from the experiments is analyzed.
    • CAPACITY ALLOCATION FOR TELEMETRY LINKS WITH VARIABLE TRANSMISSION RATES

      Fecko, Mariusz; Chang, Kirk; Kim, Heechang; Cichocki, Andrzej; Wong, Larry; O'Connell, Ray; Radke, Mark; Young, Tom; Grace, Thomas; Vencore Labs; et al. (International Foundation for Telemetering, 2016-11)
      Current IP-based telemetry systems such as iNET perform capacity allocation among multiple radios under the assumption of uniform link rates. This assumption breaks down when adaptive modulation is deployed to vary link rates in response to channel degradation. In particular, many modern radios can increase their transmission rate through adaptive coding. To take advantage of these increased rates, we designed several iNET Link Manager (LM) bandwidth allocation algorithms for the future iNET that implements adaptive coding techniques. These new LM algorithms include both weight-based schemes in which link bandwidth is allocated based on the priority assigned to the links and queues, as well as a greedy algorithm in which link bandwidth is allocated strictly based on link rates. We evaluated the effectiveness of these algorithms using both analytical analysis and test-bed experimentation. Through a rich set of test-cases, we conclude that a weight-based algorithm in which link priority is assigned using the product of link weight and link data rate has the best performance, and hence can be considered for the future iNET LM.
    • A PROGRAM TO DISPLAY BIG DATA

      Grubbs, Elmer A.; Northern Arizona University (International Foundation for Telemetering, 2016-11)
      This paper describes a new way to look at telemetry data. We examine a way to use virtual reality to evaluate and view data from a large collection of stored signals. Each individual signal will have limits associated with it that allow us to determine whether any part of the signal exceeds those limits and if so what part(s) of the waveform contain these abnormalities. A program using virtual reality to illustrate the technique has been written and will be demonstrated as part of the conference presentation.
    • OPTIMIZATION OF SYMBOL DISTANCE METRIC IN DIRECTIONAL MODULATION SYSTEMS

      Borah, Deva K.; Christopher, Ryan M.; New Mexico State University, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2016-11)
      This paper investigates a directional modulation (DM) method that distorts the received symbol constellations along a set of undesired directions while maintaining an undistorted constellation in the direction of intended communications. The problem is formulated in terms of minimization of the symbol distance metrics along the undesired directions. An algorithm assigns a symbol pair to each undesired direction for symbol distance minimization. Constraints for good reception in the desired direction are also included. The method involves iterations between a quadratic minimization problem and an unbalanced transportation problem. Numerical results are presented to show the bit error rate (BER) benefits of the proposed method.
    • EXPLORING MESH NETWORKS WITH INET RADIOS

      Newton, Todd A.; Timme, M. Wayne; Abbott, Ben A.; Southwest Research Institute (International Foundation for Telemetering, 2016-11)
      The integrated Network Enhanced Telemetry (iNET) radios provide a two-way telemetry link that interconnects the airborne instrumentation system with ground-based systems. This capability brings the flight test telemetry domain into the realm of the more classic mesh networks in a mobile ad-hoc environment. The underlying radio frequency (RF) communication protocols defined in the iNET standards support a variety of classic networking protocols. The scheduling algorithms between Link Managers and radios can operate as a collision network, like classic Ethernet. This paper describes the communication protocols and scheduling algorithms of the iNET radios, and it provides results of their use in a self-scheduling algorithm such as a classical token ring network.
    • A REPLACEMENT OF ETHERNET SWICTH FOR NETWORKED TELEMETRY SYSTEM

      Song, Jian; Zhu, Ximing; Beijing Zoweetech Ltd.; Zhongyuan Electronics Technology Institute (International Foundation for Telemetering, 2016-11)
      Ethernet is a common practice to reconstruct a networked telemetry system. However, Ethernet switch cannot best meet the requirement of data transportation in a telemetry system because of its asynchronous mode and the uncertainty of latency time. In addition, the temporal order of the telemetry data will be disrupted when using an Ethernet switch. A device similar to Ethernet switch is presented in this paper, which can transport data synchronously without losing the original temporal order of the telemetry data. Meantime, a special condition is arranged by the device that the timing signal could be transmit from the device to the receiver in a certain delay time, so a timing mechanism derived from IEEE 1588 PTP protocol could be adopted for high accuracy of timing and synchronous sampling control.