1、Best Practices Entry: Best Practice Info:a71 Committee Approval Date: 2000-03-16a71 Center Point of Contact: GSFCa71 Submitted by: Wil HarkinsSubject: EMC Guideline for Payloads, Subsystems, and Components Practice: Guidance is provided for establishing design and test requirements for the control o
2、f electromagnetic emission and susceptibility characteristics of space hardware and payloads.Programs that Certify Usage: N/ACenter to Contact for Information: GSFCImplementation Method: This Lesson Learned is based on Reliability Guideline number GT-TE-2401 from NASA Technical Memorandum 4322A, NAS
3、A Reliability Preferred Practices for Design and Test.Benefit:Implementing the Guideline provides the following technical controls in the Electromagnetic Compatibility characteristics of hardware:a. The payload and its elements do not generate electromagnetic interference that could adversely affect
4、 its own subsystems and components or the safety and operation of the launch vehicle (STS or ELV), or the launch site.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-b. The payload and its subsystems are not susceptible to emissions that could advers
5、ely affect their safety and performance. This applies whether the emissions are self-generated or derived from other sources, or whether they are intentional or unintentional.Implementation Method:Electromagnetic compatibility requirements have been established to ensure that a payload or its elemen
6、ts do not generate electromagnetic interference that can adversely affect its own subsystems and components, or other payloads, or the safety and operation of the launch vehicle (STS or ELV) and launch site. Additionally, the payload (spacecraft) and its subsystems and components should not be susce
7、ptible to emissions that could adversely affect their safety and performance. This applies whether the emissions are self-generated or emanate from other sources, or whether they are intentional or unintentional.The Guideline consists of verification requirements in each of the following categories:
8、 conducted emissions, conducted susceptibility, radiated emissions, and radiated susceptibility. Most of these requirements are taken from the widely used MIL-STD-461, 462, and 463 EMC specifications and have been tailored by the GSFC for space flight application and incorporated into the GSFCs Gene
9、ral Environmental Verification Specifications For STS it characterizes box-to-box EMI performance, providing a baseline that can be used to alert the project to potential problems at higher levels of assembly: and it aids in troubleshooting.The tests and their limits are considered minimum requireme
10、nts, however they may be revised as appropriate for a particular payload or mission.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Technical Rationale:The Guideline presents EMC verification requirements for GSFC payloads, subsystems, and components
11、 and includes a baseline for demonstrating by test satisfactory performance of hardware in the expected mission environments. The Guideline includes the applicable requirements for Shuttle carried hardware.References:1. General Environmental Verification Specification for STS & ELV Payloads, Subsyst
12、ems, And Components (GEVS-SE)2. Shuttle Orbiter/Cargo Standard Interfaces Document (JSC 07700 Volume XIV Attachment 1 (ICD 2-19001).3. Power Line Filters - Reliability Preferred Practice No. PD-ED-12064. Electrical Shielding Of Power, Signal, and Control Cables - Reliability Preferred Practice No. P
13、D-ED-1213Impact of Non-Practice: Not establishing EMC design and test requirements for space hardware and payloads could lead to an adverse affect of its own subsystems or components or the safety of the launch vehicle or launch site.Related Practices: N/AAdditional Info: Approval Info: a71 Approval Date: 2000-03-16a71 Approval Name: Eric Raynora71 Approval Organization: QSa71 Approval Phone Number: 202-358-4738Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
