Standard Practice for Recording the Exoskeleton Fit to the User

SIGNIFICANCE AND USE
5.1 The significance of the information to be recorded in a test report allows for exoskeleton safety and performance to be contextualized with the exoskeleton fit to the user. Exoskeleton tests can also be replicated across similar or different exoskeletons by using this practice to record the exoskeleton fit to the user for a test in a standardized way.  
5.2 Limitations of the practice are that not all exoskeletons have the same connections to the body and fit to all users, and therefore, fit to the user may change the exoskeleton capabilities. For example, as users vary in size, shape, gender, etc., an exoskeleton that is fit to one user may allow an increase or decrease in torque applied to the arms, legs, etc. as compared to another user, especially users at the upper and lower limits of manufacturer-suggested exoskeleton sizing. Another example is that an exoskeleton that is not fit properly to a user may be uncomfortable, and as a result the user may not perform tasks as long, as fast, as strong/delicately, or many other possible outcomes.  
5.3 It is expected that all exoskeleton tests require the exoskeleton to be fit properly to the user according to manufacturer specifications. However, as testing exoskeletons can vary, so can fit to the user, and variations in fit may also be tested. For example, a test may be performed with the exoskeleton not fit properly to the users’ legs (for example, longer fit on shorter legs) to evaluate performance changes when the task requires the user to stand on their toes. Should exoskeleton tests be performed with the exoskeleton not fit properly to the user, the test requestor should verify with the manufacturer that the exoskeleton will not harm the user as a result of a bad fit, and provide this information to the test administrator to record on the test report.  
5.4 Additional fit and measurement information may be found in Terminology D5219, Practice E3003, and Practice F1731.
SCOPE
1.1 This practice describes a means to record the exoskeleton fit to the user when testing. The practice provides a method for recording exoskeleton: alignment to the user, component distances from the body, sizing, and subjective comfort using a standard recording method.  
1.2 This practice is intended to be used with other exoskeleton test methods and practices to provide a clear representation of the exoskeleton fit to the user measured along body planes; provides a basis for comparison of the test circumstances across different exoskeletons or tests, or both; and allows a test to be recreated.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are not precise mathematical conversions to imperial units. They are close approximate equivalents for the purpose of specifying exoskeleton characteristics while maintaining repeatability and reproducibility of the test method results. These values given in parentheses are provided for information only and are not considered standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

General Information

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Published
Publication Date
14-Nov-2022
Current Stage
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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: F3613 − 22
Standard Practice for
1
Recording the Exoskeleton Fit to the User
This standard is issued under the fixed designation F3613; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope F1731 Practice for Body Measurements and Sizing of Fire
and Rescue Services Uniforms and Other Thermal Hazard
1.1 This practice describes a means to record the exoskel-
Protective Clothing
eton fit to the user when testing. The practice provides a
F3323 Terminology for Exoskeletons and Exosuits
method for recording exoskeleton: alignment to the user,
component distances from the body, sizing, and subjective
3. Terminology
comfort using a standard recording method.
3.1 Terms used within this standard refer to Terminology
1.2 This practice is intended to be used with other exoskel-
F3323 and Terminology D5219.
eton test methods and practices to provide a clear representa-
tion of the exoskeleton fit to the user measured along body
4. Summary of Practice
planes; provides a basis for comparison of the test circum-
4.1 This practice describes a method for recording the
stances across different exoskeletons or tests, or both; and
exoskeleton fit to the user when performing tests described in
allows a test to be recreated.
exoskeleton test methods. Considering the variability of users,
1.3 The values stated in SI units are to be regarded as the
exoskeletons can have a series of adjustments that can affect
standard. The values given in parentheses are not precise
how well the exoskeleton fits the user and in turn, can cause
mathematical conversions to imperial units. They are close
varying performance. For example:
approximate equivalents for the purpose of specifying exoskel-
4.1.1 Loose fit straps can cause the exoskeleton to be
eton characteristics while maintaining repeatability and repro-
misaligned with body limbs and cause chafing, impact, or
ducibility of the test method results. These values given in
lower than expected exoskeleton performance, or any combi-
parentheses are provided for information only and are not
nation thereof; or
considered standard.
4.1.2 Not following the manufacturer-suggested exoskel-
eton component alignment to the body can cause user
1.4 This standard does not purport to address all of the
instability, lower than expected exoskeleton performance, or
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- other unexpected test results.
priate safety, health, and environmental practices and deter-
4.2 This practice also provides a standard method to report
mine the applicability of regulatory limitations prior to use.
theexoskeletonfittotheuserwhichcontextualizesexoskeleton
1.5 This international standard was developed in accor-
test results. For example, the result of a timed test could be
dance with internationally recognized principles on standard-
dependent upon exoskeleton comfort due to fit to the user on
ization established in the Decision on Principles for the
walking speed up to 0.5 m/s or knee angle rotation limitation
Development of International Standards, Guides and Recom-
from 0° through 120°. As such, comparing exoskeletons fit to
mendations issued by the World Trade Organization Technical
two different users could allude to which parameters affect
Barriers to Trade (TBT) Committee.
exoskeleton performance.
2. Referenced Documents
4.3 This practice does not consider the user information (for
example, age, exoskeleton experience) nor the hardware and
2.1 ASTM Standards:
software configuration of the exoskeleton. There are also two
D5219 Terminology Relating to Body Dimensions for Ap-
important exoskeleton safety and performance areas that are
parel Sizing
currently being developed in the Standard Practice for Record-
E3003 Practice for Body Armor Wearer Measurement and
ing the Exoskeleton User Information and the Standard Prac-
Fitting of Armor
2
ticeforRecordingtheExoskeletonTestConfiguration, respec-
tively.
1
This practice is under the jurisdiction of ASTM Committee F48 on Exoskel-
etons and Exosuits and is the direct responsibility of Subcommittee F48.03 on Task
Performance and Environmental Considerations.
2
Current edition approved Nov. 15, 2022. Published December 2022. DOI: Standard designations for these practices are to be added after the standards are
10.1520/F3613-22. approved and published.
Copyright © ASTM International, 100 Barr Har
...

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