The influence of changing the road pavement and the method of using a wheelchair on the vibration perception in accordance with ISO 2631

The aim of the study is to research the influence of pavement types and the position of wheelchair a user on driving comfort. The tests have been done for six different pavements and positions of the wheelchair user, as passive and as active. The assessment has been done on the basis of vibration measurements on the seat of a wheelchair for three perpendicular directions. The obtained characteristics for the selected frequency band have been compared to the criteria curves by ISO 2631. In the next stage of the study, the multiplicity of the exceedances of the vibration perception threshold and the vibration comfort have been calculated. The values of the multiplicity of exceedances have been used in the carried-out assessment process.