Browsing International Telemetering Conference Proceedings, Volume 49 (2013) by Subjects
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An Application of Sync Time Division Multiplexing in Telemetry SystemHigh speed real-time data transportation is most important for telemetry systems, especially for large-scale distributed systems. This paper introduces a STDM (Sync Time Division Multiplexing) network structure for data transportation between devices in telemetry systems. The data in these systems is transported through virtual channels between devices. In addition, a proper frame format is designed based on PCM format to meet the needs of synchronization and real-time transportation in large-scale distributed telemetry systems.
On-Board Wireless Data Acquisition System and TelemetryMost of today's aircraft used for the commercial transport of passengers or military aircraft still rely on simple technology such as cables, connectors and sensors to provide power, avionics data, control system, aircraft instrumentation etc. throughout the vehicle's life-cycle for flight monitoring and fault diagnosis. Despite a marked improvement in the quality and reliability of these components, they continue to be the main cause of failures due to corrosion, misuse, improper installation, etc, using-up endless man-hours to troubleshoot, repair and upgrade them. Wireless monitoring by telemetry of some of the critical systems has been in use for some time as a point to point data link designed to provide vital information, potentially improving the safety and efficiency of any flight. Aircraft manufacturers are now looking at the use of wireless networks to replace current data buses used for the transfer of data between avionics systems and their sensors as well as for the control of some of the surface actuators. Wireless networks used in this way could reduce the amount of cabling and its associated weight as well as simplify the re-routing of connections making upgradation less expensive and quicker, again a benefit to airlines. Despite many benefits there is a potentially serious security issue by means of an introduction of a backdoor into the system, meaning that before aircrafts become network-enabled, all the security issues must be identified in full and dealt with.
The Subminiature Flight Safety System (SFSS) Development ProgressSFSS is a universal, small, and low cost, functionally redundant flight termination system (FTS) that incorporates encoding, processing and TSPI capabilities, provides critical health/safety/welfare monitoring and allows for highly efficient telemetering of weapon application and FTS data. The SFSS is intended as a solution to provide weapon system developers, test agencies, and range safety officers the ability to track, monitor, and if necessary, terminate all types of weapon systems. The SFSS components are intended to significantly reduce the recurring costs and improve the quality of test support by minimizing physical intrusion into weapon systems, and potentially eliminating the need for warhead removal. In addition, a common hardware suite assists in reducing the overall system cost of acquisition, a key element in today's world of stressed budgets. The SFSS is designed to interface with newly developed weapon systems, while providing the capability to be integrated into existing weapon systems with nominal modifications to the platform. The SFSS development is a multi-disciplinary effort, whose participating organizations include industry suppliers, range and system safety representatives, and technical offices from all branches of the armed services, as well as the weapons vendors to ensure that applicable technical and regulatory requirements are met. The original requirements for the project were defined within the SFSS System Performance Specification (SPS), which has undergone a number of updates as the design effort has progressed from concept to assembly and debug of the prototype components. This paper will provide an overview of the overall program status, key features of the SFSS including features added during development, critical design challenges, and additional activities planned to enhance the functionality of the system.