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Technical Paper

ESM Analysis of COTS Laundry Systems for Space Missions

2002-07-15
2002-01-2518
Clothing supply has been examined for historical, current, and planned missions. For STS, crew clothing is stowed on the orbiter and returned to JSC for refurbishment. On Mir, clothing was supplied and then disposed of on Progress for incineration on re-entry. For ISS, the Russian laundry and 75% of the US laundry is placed on Progress for destructive re-entry. The rest of the US laundry is stowed in mesh bags and returned to earth in the Multi Purpose Logistics Module (MPLM) or in the STS middeck. For previous missions, clothing was supplied and thrown away. Supplying clothing without washing dirty clothing will be costly for long-duration missions. An on-board laundry system may reduce overall mission costs, as shown in previous, less accurate, metric studies. Some design and development of flight hardware laundry systems has been completed, such as the SBIR Phase I and Phase II study performed by UMPQUA Research Company for JSC in 1993.
Technical Paper

ESD testing according to RTCA DO-160D, Section 25

1999-06-22
1999-01-2410
Cabin electronic equipment can be effected by electrostatic discharge due to environmental and installation conditions, such as low relative humidity and the use of poor or non-conductive materials for carpets, seat textiles, arm rests etc., which exist in all locations within the aircraft. For ESD testing, different Human Body Models, such as the MIL-STD-833 and the RTCA DO-160D (comparable to IEC 1000-4-2) were applied to the passenger entertainment system to reproduce the same system failures observed by different customers. Comparison of the models showed that only the contact discharge with a modified network of the DO-160D standard is the appropriate test method to recreate the problems observed on current equipment and to obtain reproducable test results. Therefore it is recommanded that section 25 of the DO-160D for cabin electronic equipment be modifed.
Technical Paper

ESD Current Measurement Using the Near Mangetic Field

2004-03-08
2004-01-1778
In order to evaluate the toughness of automotive ECU's to electrostatic discharge, a conventional method where electrostatic discharge pulse is applied to connector parts on a printed circuit board is commonly used. But quantitative re-designing principles to improve the static electricity tolerance have not been made clear that completely utilizes the test data shown below till now, because propagation mechanism of static electricity on a circuit board is not clear. This paper describes the ESD current measurement technique which detects the near magnetic field generated by ESD currents. We developed to measure the ESD currents using the new loop antenna on a circuit board. The ESD current, was generated with the static electricity applied to a model circuit pattern in conformity with IEC and ISO standard and measured using the antenna. Also it was able to visualize how static electricity energy would propagate through the circuit board.
Standard

ESCAPE PROVISIONS, FLIGHT DECK

1964-05-30
HISTORICAL
ARP808
This Aerospace Recommended Practice applies to all transport category aircraft certificated under CAR 4b, regardless of means of propulsion, design speed regime, or kind of payload carried.
Technical Paper

ESCAPE CAN Limitations

2007-04-16
2007-01-1487
The Controller Area Network (CAN) protocol is a de facto network standard for automotive applications. Since initial deployments in the late 1980s the simple low-cost bus topology and inherent flexibility of CAN have enabled it to capture the majority of low- to medium- speed networking traffic. Today most automotive engine control units (ECU) have some form of connection to a CAN network, and most automotive-centric semiconductors have at least one integrated CAN controller. However, as safety-related applications emerge, some of the advantageous attributes and features of the CAN protocol can lead to dependability vulnerabilities. This paper reviews the dependability of CAN and introduces a new enforcement and configuration strategy to augment CAN protocol dependability. The strategy enables standard COTS CAN node hardware to be used without modification.
Technical Paper

ESCAN - An Open Source, High Bandwidth, Event Scheduled Controller Area Network

2011-04-12
2011-01-1041
Event Scheduled CAN (ESCAN) is a new, open sourced, scheduling protocol for CAN. The aims of the protocol are discussed, including the ability to optimise the available bandwidth over CAN and enable maximum bus loading as well as providing a worst case determinism for message reception. A number of potential applications for the protocol are covered as well as details of how ESCAN can be used to optimise existing higher layer protocols such as CANopen and J1939. A comparison with TTCAN is also discussed, including the benefits of ESCAN in terms of CPU utilisation, ROM and RAM requirements and the potential for cost savings that that brings while still providing the advantages of TTCAN. These advantages include a simple to implement basic protocol stack, no specialist hardware requirements needed to support the protocol other than a TTCAN compliant CAN controller (this is so that the retransmission of CAN frames can be disabled).
Standard

ESC63 Connector Accessory: Clip

1993-09-01
CURRENT
ESC63-1
This drawing specifies parts ESC63-10 and ESC63-12. To view suppliers qualified to manufacture this part, visit https://ts200.sae-itc.org/.
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