ISO 14302:2022 宇宙システム—電磁両立性要件 | ページ 6

3.1.1

break-out box

non-flight piece of test support equipment that is connected in-line with a cable that accommodates external connection (usually binding posts) of instrumentation or series/parallel test networks to the wiring in that cable

3.1.2

complete space system

suite of equipment, subsystems, skills, and techniques capable of performing or supporting an operational role

Note 1 to entry: A complete space system includes related facilities, equipment, subsystems, materials, services, and personnel required for its operation to the degree that it can be considered self-sufficient within its operational or support environment.

Note 2 to entry: The complete space system normally refers to the spacecraft or launch vehicle itself.

3.1.3

dead-facing

removal of power from a circuit prior to mating/de-mating of the circuit interface (usually to prevent arcing or inadvertent short circuits)

3.1.4

electromagnetic compatibility

EMC

ability of a space equipment or system to function satisfactorily in its intended electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment

3.1.5

electromagnetic interference

EMI

degradation of the performance of a space equipment (3.1.6) , transmission, channel, or system caused by an electromagnetic disturbance

3.1.6

equipment

integrated set of parts, and components

Note 1 to entry: An equipment accomplishes a specific function.

Note 2 to entry: An equipment is self-contained and classified as such for the purposes of separate manufacture, procurement, drawings, specification, storage, issue, maintenance, or use.

SOURCE: ISO 10795 3.93

3.1.7

faying surface

prepared conductive surface of sufficient area and conductivity that, when joined under pressure contact, ensures a low electrical bond impedance for the required life of the connection

3.1.8

floating

status of a circuit isolated from another one, which is characterized by a resistance of strong value in parallel with a capacity.

Note 1 to entry: In low frequency, the circuit is actually high impedance; it is not the case in HF considering the parasitic capacitor. “Floating” is therefore to use for a frequency domain that it is then necessary to specify.

3.1.9

immunity

ability of a device, equipment (3.1.6) , or system to perform without degradation in the presence of an electromagnetic disturbance

3.1.10

internal charging

phenomenon caused by penetration of high-energy electrons through spacecraft structures and/or component walls so that these particles are incident on ungrounded metallic or dielectric internal surfaces

3.1.11

line impedance stabilization network

LISN

network inserted in the supply mains lead of an apparatus to be tested which provides, in a given frequency range, specified source or load impedance for the measurement of disturbance currents and voltages and which may isolate the apparatus from the supply mains in that frequency range

3.1.12

power quality requirement

requirement developed for the space system that defines the conducted voltage and current noise (from load regulation, spikes, sags, etc.) the power user can expect

3.1.13

procuring authority

agency or organization funding or administering a contract for the development of the space system

3.1.14

radio frequency interference

RFI

degradation of the reception of a wanted signal caused by a radio frequency disturbance

3.1.15

safety margin

ratio of circuit threshold of susceptibility (3.1.18) to induced circuit noise under worse-case expected environmental conditions (intrasystem and intersystem)

3.1.16

subsystem

set of interdependent elements constituted to achieve a given objective by performing a specified function, but that does not, on its own, satisfy the customer's requirement

Note 1 to entry: Generally, a piece of equipment is housed within a single enclosure, while a subsystem may consist of several interconnected units.

Note 2 to entry: ISO 10795 3.231, modified — Note 1 to entry added.

3.1.17

susceptibility

correct operation of electrical equipment (3.1.6) , referred to as the victim, in the presence of unplanned electromagnetic disturbances

Note 1 to entry: A victim is a component/subsystem that is susceptible to interference.

3.1.18

suppression

act of eliminating electromagnetic noise through the process of filtering, shielding, or other methods that reduce the impact of noise on a system