Research On Validation Method Of Vehicle Handling And Stability Model

Simulation technology, with the advantages of reducing development costs,shortening vehicle development cycles and improving product quality, plays an importantrole in the vehicle development process.This paper research the method of steeringstability model from the maneuvering stability of vehicle dynamics model. The author haslooked for a mathematical method that suitable for handling and stability model validation,puts forward classification method of handling stability model validation from the steadytime domain, the transient time domain and frequency domain, and presents the validationexamples.1. Research on Mathematical model validation error algorithm. In order to comparethe error between the model and the actual vehicle dynamics system quantitatively, thecorresponding error algorithm need to be found out.This paper explores the mathematicalmethods which is suitable judging the time history curve error, finally founds out themethod that judging errors between two groups of curve comprehensively, namely reflectsthe degree of precision between the simulation model and the actual system through thephase error and amplitude error after DTW.2. Analysis of model validation system on vehicle handling and stability. Handlingand stability of the vehicle include vehicle response characteristics, properties of the rolland returnability, with input of steering wheel angle, steering wheel force, the forwardspeed, and output of yaw rate, lateral acceleration and roll angle. The article also discussthe relationships between these responses and vehicle modeling from the point of view ofthe vehicle dynamics. In order to fully validate the vehicle’s handling and stability model,we verify the condition into the time domain and frequency domain, time domain is alsodivided into two parts, the steady-state and transient. Validation tests in steady-static timedomain: steady static circular test(fixed steer wheel angle), the steady static value in thesteering wheel angle step input test, and without considering the fixed speed and fixedturning radius in the steady static circular test, considering accuracy of the vehicle model in steady-static time domain. Validation test in transient-static time domain: the steeringwheel angle step input test, the "central area" of central steering test, open loop test ofsteering wheel release, and without considering lane change test and the test of interruptpower output during turning. The test in frequency dominate: the test of steering wheelangle pulse input, the test of stability of steer-off motion on a straight-ahead driving. Andstarting from the completeness of model validation, the paper analyzes the influence to themodel response about the speed and steering angle input, determines the specificconditions of each validation test ultimately and and matchs with the corresponding modelvalidation error algorithm..3.On the basis of the handling and stability model validation method, according to theclassification of steady-static time domain, transient time domain and frequency domainvalidation, the paper provides specific instances about handling and stability modelvalidation.