6. ValidationThe obtained robust combination of control factors was again executed on the test rig and the Ride Comfort values were recorded at different values of mass, as shown in Table 8. The results show that for the selected combination of control factors, the mean value of Ride comfort obtained is 0.614 m/s2 and the standard deviation is 0.02417.The same procedure was repeated with another combination of control factors i.e. at typ = 40 psi, K= 18000 N/m and C = 418 Ns/m, at different values of sprung mass. The Figure 4 shows the normal probability plots of values of Ride comfort by taking both robust combination and the other non-robust combination. It shows the decrease in variability in Ride Comfort with the variation in mass when robust combination is applied.7. ConclusionTaguchi design has been successfully applied to obtain a design which minimizes the variation in Ride Comfort of a vehicle due to mass. The analysis suggests that the combination of tyre pressure value of 35 psi, spring stiffness of 26000 N/s and Damping coefficient of 673 N-s/m results into a design robust of mass. The obtained design was again validated on the test rig and the variation in the response is found to be reduced up to 0.02417.AcknowledgementsThe authors are thankful to the MESCOE-NI LabVIEW Academy Lab, Department of Mechanical Engineering,Modern Education Society’s College of Engineering, Pune, INDIA for providing the necessary testing facilities.