BS ISO 9043:2008 pdf free.Mopeds — Measurement method for moments of inertia.
Introduction
The stability of a moped is a very important element of its active safety. The moped/rider combination and the environment in which this combination is used form a unique closed-loop system. However, the evaluation of moped/rider combination stability is extremely complex because of interaction of the intrinsic moped stability, the influence of the position of the rider and his response to continuously changing conditions.
In the evaluation of moped stability, the determination of the kinetic characteristics of the moped/rider combination is considered an important part of the design parameters of the vehicle itself.
The test procedure described in this International Standard deals with one aspect of the kinetic characteristics:
the determination of the moments of inertia of the moped and of the moped/rider combination.
BS ISO 9043 specifies a measuring method for determining the moments of inertia of the moped and of the moped/rider combination.
BS ISO 9043 applies to two-wheeled mopeds. Other measuring methods can be used if it is demonstrated that the results are equivalent.
2 Normative references
ISO 3779, Road vehicles-Vehicle identification number(VIN)-Content and structure.
ISO 8705, Mopeds-Measurement method for location of centre of gravity.
49 CFR Part 572 Subpart B [Code of Federal Regulations, issued by the National Highway Traffic Administration(NHTSA)]
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
moped-fixed axis system (x, y, z)
right-hand orthogonal axis system fixed in the moped, such that when the moped is moving in a straight line on a level road, the x-axis is substantially horizontal, points forwards and is in the longitudinal plane of symmetry of the moped, the y-axis points to the rider’s left side and the z-axis points upwards
NOTE 1 This coordinate system performs translation motion and rotational motion together with the moped.
NOTE 2 Assuming that the moped is fixed to a platform, the coordinate system is also applied to the platform.
3.2
earth-fixed axis system (X, Y, Z)
right-hand orthogonal axis system fixed on the Earth, such that the X-axis and the V-axis are in a horizontal plane and the Z-axis points upwards.BS ISO 9043 pdf download.