A Finite Memory Structure Smoothing Filter Based Road Vehicle’s Suspension System with Temporary Uncertainties 


Vol. 15,  No. 1, pp. 12-20, Jan.  2026
10.3745/TKIPS.2026.15.1.12


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  Abstract

In this paper, an alternative road vehicle's suspension system with temporary uncertainties is developed. The finite memory structure(FMS) smoothing filter is adopted to provide intrinsic robustness as well as to consider cases where there is a fixed delay between a measurement and the availability of its estimate. The single-corner model, which is also called the 1/4 model or the quarter-car model for one of the four wheels, for the road vehicle's suspension system and its state-space model are described. Model uncertainty and unknown input are introduced as representative temporary uncertainties, and the role of estimation filter is described to resolve problems due to temporary uncertainties. Then, the FMS smoothing filter based road vehicle's active suspension system is developed under temporary uncertainties. The time-invariance of the FMS smoothing filter gain is explained and the relationship between the window length and the performance is briefly described. To verify the performance of the developed FMS smoothing filter based system, extensive computer simulations using MATLAB are performed to cover both nominal and temporarily uncertain systems. It is shown that the FMS smoothing filter based road vehicle's active suspension system can outperform not only FMS filter based system but also infinite memory structure(IMS) filter based system. Moreover, after the effect of temporary uncertainty completely disappear, the FMS smoothing filter based system is shown to be comparable to FMS filter based and IMS smoothing filter based systems.

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[IEEE Style]

P. S. Kim, "A Finite Memory Structure Smoothing Filter Based Road Vehicle’s Suspension System with Temporary Uncertainties," The Transactions of the Korea Information Processing Society, vol. 15, no. 1, pp. 12-20, 2026. DOI: 10.3745/TKIPS.2026.15.1.12.

[ACM Style]

Pyung Soo Kim. 2026. A Finite Memory Structure Smoothing Filter Based Road Vehicle’s Suspension System with Temporary Uncertainties. The Transactions of the Korea Information Processing Society, 15, 1, (2026), 12-20. DOI: 10.3745/TKIPS.2026.15.1.12.

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