ASTM F2137-18

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2137 − 18
Standard Practice for
Measuring the Dynamic Characteristics of Amusement
1
Rides and Devices
This standard is issued under the fixed designation F2137; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This practice covers acquisition of data related to the
3.1 Definitions:
dynamic characteristics of amusement rides and devices.
3.1.1 aliasing—aphenomenonassociatedwithsampleddata
systems, wherein a signal containing significant energy at
1.2 This practice also defines the specific requirements of a
frequencies greater than one half of the system sample fre-
Standardized Amusement Ride Characterization Test (SARC
quency manifests itself in the sampled data as a lower
Test) for use in characterizing the dynamic motion of an
frequency (aliased) signal. Aliasing can be avoided only by
amusement ride or device.
limiting the frequency content of the signal prior to the
1.3 The values stated in inch-pound units are to be regarded
sampling process. Once a signal has been aliased, it is not
as standard. The values given in parentheses are mathematical
possible to reconstruct the original signal from the sampled
conversions to SI units that are provided for information only
data.
and are not considered standard.
1.3.1 Exception—The values are reversed in Section 13
3.1.2 calibration constant—the arithmetic mean of the sen-
since EN standards primarily use SI units.
sitivity coefficients, evaluated at frequencies that are evenly
spaced on a logarithmic scale between F and F .
1.4 This international standard was developed in accor-
L H
dance with internationally recognized principles on standard-
3.1.3 calibration value—the ratio of the reference calibra-
ization established in the Decision on Principles for the
tion system output, in engineering units relevant to the
Development of International Standards, Guides and Recom-
transducer, to the data channel output, in volts, as measured at
mendations issued by the World Trade Organization Technical
constant excitation frequency and amplitude.
Barriers to Trade (TBT) Committee.
3.1.4 channel frequency class (CFC)—afrequencyresponse
2. Referenced Documents envelopethatconformstoFig.1andisreferredtobythevalue
2 F in hertz. The CFC frequency response envelope is defined
H
2.1 ASTM Standards:
by the boundaries shown in Fig. 1 and the following charac-
F747Terminology Relating to Amusement Rides and De-
teristic frequencies:
vices
F —Pass band lower limit (hertz). Always equal to zero
3
L
2.2 SAE Standard:
(0.0) hertz.
SAEJ211Instrumentation for Impact Tests
F —Pass band upper limit (hertz). The CFC designator.
4 H
2.3 EN Standard:
F —Thecornerorkneeofthefrequencyresponseenvelope.
N
EN 13814Fairground and amusement park machinery and
Always equal to or greater than 1.667× F .
H
structures - Safety
F —The minimum sample frequency for a sampled data
S
system that corresponds to the designated CFC. Always equal
to or greater than 12× F .
1
H
ThispracticeisunderthejurisdictionofASTMCommitteeF24onAmusement
Rides and Devices and is the direct responsibility of Subcommittee F24.10 on Test
3.1.4.1 Discussion—F , F , F ,and F arealwaysspecified
L H N S
Methods.
in hertz. While the characteristics of the CFC may be applied
Current edition approved Sept. 1, 2018. Published November 2018. Originally
to individual components of a data channel, the CFC is, by
approved in 2001. Last previous edition approved in 2016 as F2137–16. DOI:
10.1520/F2137-18. definition, the frequency response envelope of the entire data
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
channelfromthemountedtransducertothefinalrepresentation
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
of the acquired data.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3.1.5 coordinate system—three orthogonal axes that inter-
3
Available from Society of Automotive Engineers, 400 Commonwealth Drive,
sect at an origin whose positive directions correspond to the
Warrendale, PA 15096.
4
Available from European Committee for Standardization, http://www.cen.eu/. right-hand rule.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2137 − 18
FIG. 1 Frequency Response Envelope
3.1.5.1 measurement coordinate system—a coordinate sys- 3.1.13 resolution—the lowest magnitude data channel out-
tem that provides the reference axes and sign convention for
put value that can b
...