ASTM F2137-19

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2137 − 19
Standard Practice for
Measuring the Dynamic Characteristics of Amusement
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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 3.1.1 aliasing—aphenomenonassociatedwithsampleddata
systems, wherein a signal containing significant energy at
1.1 This practice covers acquisition of data related to the
frequencies greater than one half of the system sample fre-
dynamic characteristics of amusement rides and devices.
quency manifests itself in the sampled data as a lower
1.2 This practice also defines the specific requirements of a
frequency (aliased) signal. Aliasing can be avoided only by
Standardized Amusement Ride Characterization Test (SARC
limiting the frequency content of the signal prior to the
Test) for use in characterizing the dynamic motion of an
sampling process. Once a signal has been aliased, it is not
amusement ride or device.
possible to reconstruct the original signal from the sampled
1.3 The values stated in inch-pound units are to be regarded data.
as standard. The values given in parentheses are mathematical
3.1.2 calibration constant—the arithmetic mean of the sen-
conversions to SI units that are provided for information only
sitivity coefficients, evaluated at frequencies that are evenly
and are not considered standard.
spaced on a logarithmic scale between F and F .
L H
1.3.1 Exception—The values are reversed in Section 13
3.1.3 calibration value—the ratio of the reference calibra-
since EN standards primarily use SI units.
tion system output, in engineering units relevant to the
1.4 This international standard was developed in accor-
transducer, to the data channel output, in volts, as measured at
dance with internationally recognized principles on standard-
constant excitation frequency and amplitude.
ization established in the Decision on Principles for the
3.1.4 channel frequency class (CFC)—afrequencyresponse
Development of International Standards, Guides and Recom-
envelopethatconformstoFig.1andisreferredtobythevalue
mendations issued by the World Trade Organization Technical
F in hertz. The CFC frequency response envelope is defined
H
Barriers to Trade (TBT) Committee.
by the boundaries shown in Fig. 1 and the following charac-
teristic frequencies:
2. Referenced Documents
F —Pass band lower limit (hertz). Always equal to zero
2
L
2.1 ASTM Standards:
(0.0) hertz.
F747Terminology Relating to Amusement Rides and De-
F —Pass band upper limit (hertz). The CFC designator.
H
vices
F —Thecornerorkneeofthefrequencyresponseenvelope.
N
3
2.2 EN Standard:
Always equal to or greater than 1.667× F .
H
EN 13814Fairground and amusement park machinery and
F —The minimum sample frequency for a sampled data
S
structures - Safety
system that corresponds to the designated CFC. Always equal
to or greater than 12× F .
H
3. Terminology
3.1.4.1 Discussion—F , F , F ,and F arealwaysspecified
L H N S
3.1 Definitions:
in hertz. While the characteristics of the CFC may be applied
to individual components of a data channel, the CFC is, by
definition, the frequency response envelope of the entire data
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ThispracticeisunderthejurisdictionofASTMCommitteeF24onAmusement
channelfromthemountedtransducertothefinalrepresentation
Rides and Devices and is the direct responsibility of Subcommittee F24.10 on Test
of the acquired data.
Methods.
Current edition approved Oct. 15, 2019. Published November 2019. Originally
3.1.5 coordinate system—three orthogonal axes that inter-
approved in 2001. Last previous edition approved in 2018 as F2137–18. DOI:
sect at an origin whose positive directions correspond to the
10.1520/F2137-19.
2 right-hand rule.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.5.1 measurement coordinate system—a coordinate sys-
Standards volume information, refer to the standard’s Document Summary page on
tem that provides the reference axes and sign convention for
the ASTM website.
3
Available from European Committee for Standardization, http://www.cen.eu/. the test data record(s).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2137 − 19
FIG. 1 Frequency Response Envelope
3.1.5.2 patron coordinate system—a coordinate syste
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