Search Results

EMB (Electro-Mechanical Brake) system that removes hydraulic brake device from conventional brake systems completely can be considered as BbW (Brake-by-Wire) system in the full sense. As the research on the EMB system is actively conducted, it is also required to establish the test methods for the performance verification and evaluation of developed EMB system. In fact, however, the characteristics of the EMB system makes it difficult to apply it to an actual vehicle test due to the expense and safety matters in the process of the test and evaluation. Thus, this study developed the EMB HILS (Hardware In the Loop Simulation) system in application of the actual EMB system in order to verify the actuating response characteristics and control logic performance of the EMB system before an actual vehicle test.

In this paper, we suggest a new control algorithm for driver's intention judgment for collision avoidance using a steering system to improve the emergency steering system performance. Most of the collision avoidance systems proposed by previous works relied only on the braking systems. Recently the automotive industry began to consider ways to avoid collisions using the steering system. It is not hard to imagine that any steering-assisted collision avoidance algorithm must judge a driver's intention for lane change before any attempt at longitudinal avoidance is made. To improve the accuracy of driver's intention judgment and thus the performance of the emergency steering system, we developed a new algorithm based on on-center handling characteristics generated by the steering system. The performance of the proposed driver's intention algorithm was validated in the test of real vehicles as well as in the SILS environment.

In this paper, the hardware-in-the loop simulator which is used for evaluating performance of the EPS (Electric Power Steering) system has been developed. The HILS system consists of the steering system of the light commercial vehicle - the steering wheel, the EPS module, the universal joint, and the rack bar. These components were placed in proper spaces based on location of their hard points in an actual vehicle. An electric servo motor has been used for generating the road reaction force which is generated by vehicle's kingpin moment. A real-time simulation environment has been developed using CarSim to evaluate performance of EPS through various handling tests. For verifying reliability of the HILS system, various handling tests were performed and compared with the results of actual vehicle tests in the proving ground. Through the developed EPS HILS system, various handling tests were successfully performed in the laboratory.