Research On Automobile Adaptive Cruise Control Strategy And Test Scenario

The advanced driving assistance system can not only effectively relieve the driving fatigue but also reduce the accident rate.The ACC system is an important part of the advanced driving assistance system.On the other hand,With the development of intelligent driving,the test of intelligent driving system has become more important.Therefore,the research on adaptive cruise control system and test scenarios is of great significance.The main research contents of this paper are as follows:1)Based on the standards,regulations and the analysis of domestic manufacturers’ requirements,the function of the adaptive cruise system is described in detail,and the advantages and disadvantages of the common workshop distance models are analyzed.The longitudinal safety distance model cannot well respond to the change lane of traffic vehicles.This paper decided to adopt a lateral / longitudinal responsibility sensitive security(RSS)model.2)Analyze the lane changing behavior of the traffic vehicle,propose a strategy to screen the target vehicle based on lateral/longitudinal RSS,and complete the collection of driver behavior data based on the driving simulator as the training sample,and design the ACC system through the Simulink fuzzy neural network toolbox.The training of the cruise controller avoids the problem that fuzzy logic of fuzzy control is highly dependent on expert experience,and establishes an inverse model of the engine and brake based on the look-up table method to convert the expected acceleration input by the upper controller into the engine throttle opening and control Move the master cylinder pressure and send the target amount to the ASM vehicle dynamics model to complete the closed-loop control.3)Based on the PEGASUS scenario library design architecture,complete the design of the ACC system and the selection of six layers of scenario elements,focus on analyzing the composition of dynamic scenario elements,and complete the design of functional scenario,logical scenario and specific scenario.Finally,the test scenarios based on ADAS standards are designed.4)Integrate the ACC model into d SPACE’s ASM model,complete closed-loop debugging,and then complete the test scenario design based on Modeldesk and Motiondesk.Finally,choose three typical scenarios: constant speed cruise,cut-in & stable follow and stop-go follow,under the working conditions,the ACC system is tested by simulating,and a controller based on fuzzy control is set for comparative testing.