A Development of the Validation System of Indirect TPMS

Abstract

Indirect tire pressure monitoring system (ITPMS) uses only the soft-ware which is embedded in the electronic stability control (ESC) to determine whether the low-pressure of the tire. Because they do not use a sensor, unlike the direct TPMS, there are advantages that can greatly contribute to cost reduc-tion and weight reduction of the vehicle. ITPMS uses a radius analysis and frequency analysis to determine whether the low-pressure of the tire. In case of the radius analysis, the relative change is measured in the radius of the running of the tire according to the change in pressure. Thus, in the case of 1-3 low pressure of the tire, which is accompanied by the wheel difference, it is possible to detect a low pressure. On the other hand the case of the low pressure four wheels, all four wheels cannot be de-tected by the low pressure conditions using the radius. To overcome the disad-vantages of this radius analysis method, we use a frequency analysis. Because of the above-described technical features, ITPMS can only deter-mine whether the low pressure when the vehicle is driving and receives a great influence on the tire and the driving environment. As opposed to using the hardware in the loop simulation (HILS) to verify the effect of the plant and the environment for a typical chassis system, because making the tire model to si-mulate the non-linear characteristics and the frequency characteristics according to the driving mode of the tire is difficult, the implementation of HILS is not easy. In this study, we introduce the verification system for verifying effectively on the process of developing ITPMS. We'll investigate developments such as the process of converting to the verification data by using the data measured via actual vehicle traveling, building test data management system to systematically manage the data, building model in the loop simulation (MILS) environment using a parallel processing system for verifying the developed software, simula-tors for verifying ITPMS performance on the hardware. We can develop ITPMS effectively through the Verification Process on the basis of the above.