Pollution Practical Research of Adaption Cruise Control System Radar During Winter Usage Condition

Abstract

Adaption Cruise Control system (ACC) of Advanced Driving Assistance Systems (ADAS) radar performance was checked on public roads during winter usage condition. Evaluation was done accordance the test method was developed before. The test method main purposes are creation of mix mud plus snow (M+S) layer on radar working surface; finding max layer thickness when ACC stop to operate correctly; layer thickness increasing speed calculation. The test was done on toll Moscow – Sankt-Petersburg road during winter. It was comparison test. Vehicles as with upper radar location (on radiator grill) and vehicles with lower radar location (on the bottom part of front bumper) as well were chosen. Upper location: Volkswagen Tiguan and Nissan X-Trail; lower location: BMW X; KIA Seltos and Nissan Pathfinder. During the test the scene when radar was "blind" and ACC worked incorrectly were achieved many times. Mud+Snow (M+S) layer thickness were measured on such scenes. Layer thinness increasing speeds were calculated. The main conclusions are: lower radars are covered my M+S quicker than upper radars; usually lower radar layer thickness is bigger; thickness increasing speed in not constant and it depends from many external factors; heavier parts usually cover lower zones of test vehicle; additional radar surface heater reduces layer thickness significantly. After radar have been "blind" two possible ACC operation variants were studied. Based on practical evaluation at least two conclusion / recommendations were done: radar should be located as upper above a road surface as possible; lower radar should have additional heater.