An investigation regarding the effects of acceleration produced by cabin suspension systems fitted to agricultural tractors upon the operator, in terms of operator health

Abstract

Operators of agricultural tractors are exposed to high levels of acceleration. This paper critically examines acceleration data (in the x and y was) collected through practical tests. Data collected shows that when cabin suspension is fitted to agricultural tractors, operators are exposed to increased levels of acceleration, up to 62% and 25% at 2.5 kph in the x and y avis respectively, when compared to the respective chassis system. Acceleration above 5.98 m/s(2) may result in the operator developing musculoskeletal disorders (MSD). his limit is exceeded in the y axis at 17 kph by a Jour-point active cabin suspension. Moreover, the mass of the head torso, will multiply acceleration measured at the seat base, by 2.5, therefore, this limit is exceeded at 6.5 kph in the y axis. Consequently, up to 62% Of agricultural tasks have the potential for the operator to sustain MSD. Concerns have been raised regarding the current operational speeds of agricultural tractors; this is due to the potential for acceleration above 5.98 m/s(2), to he generated and transferred to the operator and can result in MSD.