1.1 This standard recommends practices for performance verification of multi-axis force
platforms commonly used for measuring ground reaction forces during gait, balance,
and other activities.
1.1.1 This standard provides a method to quantify the relationship between applied input
force and force platform output signals across the manufacturer’s defined spatial
working surface and specified force operating range.
1.1.2 This standard provides definitions of the critical parameters necessary to quantify
the behavior of multi-axis force measuring platforms and the methods to measure the
parameters.
1.1.3 This standard presents methods for the quantification of spatially distributed errors
and absolute measuring performance of the force platform at discrete spatial intervals
and discrete force levels on the working surface of the platform.
1.1.4 This standard further defines certain important derived parameters, notably COP (center
of pressure) and methods to quantify and report the measuring performance of such
derived parameters at spatial intervals and force levels across the working range
of the force platform.
1.1.5 This standard defines the requirements for a report suitable to characterize the force
platform’s performance and provide traceable documentation to be distributed by the
manufacturer or calibration facility to the users of such platforms.
1.1.6 Dynamic characteristics and applications where the force platform is incorporated
in other equipment, such as instrumented treadmills and stairs, are beyond the scope
of this standard.
1.1.7 This standard is written for purposes of multi-axis force platform verification. However,
the methods and procedures are applicable to calibration of force platforms by manufacturers.