Analysis of bio-dynamic model of seated human subject and optimization of the passenger ride comfort for three-wheel vehicle using random search technique. (March 2021)

• Record Type: Journal Article
• Authors: Sharma, Rakesh Chandmal; Sharma, Sakshi; Sharma, Sunil Kumar; Sharma, Neeraj; Singh, Gurpreet
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 235:Number 1(2021)
• Page Start: 106
• Page End: 121
• Publication Date: 2021-03
• Subjects: Vertical ride -- lateral ride -- ride comfort -- optimization -- random search technique -- ISO-2631-1; Machinery, Dynamics of -- Periodicals; Machine design -- Periodicals; 621.815
• DOI: 10.1177/1464419320983711
• Languages: English
• ISSNs: 1464-4193

Abstract

Ride comfort is the major concern to the roadway vehicle passengers, travelling in as it affects their health and efficiency to work. In the present study, a 9 DoF model of a three-wheel vehicle is developed with Lagrangian approach to investigate its ride behavior when subjected to random surface irregularities. The irregularities of the track are measured with a three-wheeled setup equipped with profilometer known as opto-coupler. The present model is validated in two ways, first by comparing the vertical-lateral PSD acceleration received from simulation and actual testing and second by comparing vertical seat to head transmissibility obtained from analysis (VSTH) with past reported studies. A 7 DoF bio-dynamic model of the seated human subject is formulated and integrated with the vehicle model, ride comfort of the vehicle and human body segments are assessed based on ISO specifications. Passenger Ride Comfort is optimized through non-linear optimization using Random Search Technique. The modified values of vehicle suspension parameters are presented to obtain optimum passenger comfort based on ISO-2631-1 criteria.