ABSTRACT
V e h i c l e s a f e t y i s m o r e a n d m o r e c o n c e r n e d a b o u t. F o r t h e m o s t a d v a n c e d
automotive safety products, ESP (electronic stability program) have been very in-depth
s t u di e d i n E u r o p e a n d J a p a n . A t t h e s a m e t i m e , E u r o p e a n d J a p a n h a v e t h e i r o w n
ESP products, but domestic research is still at the initial stage and there are no market
ESP products in domestic. For the reasons of funding, research and development cycle,
and safety, it is impossible for ESP researching and development only to rely on the real
veh ic l e exp erim e nts. A t pres e nt, t h e mos t com mo n way is to re p l ace the real ve h i cle
e x p e r i m e n t s w i t h s i m u l a t i o n e x p e r i m e n t s . A s a r e s u l t , t o e s t a b l i s h a n a c c u r a t e a n d
r e l i a b l e ve h i c l e m o d e l h a s b e c o m e a k e y s t e p i n p r o c e s s o f E S P r e s e a r c h a n d
development.
In this paper, vehicle dynamics modeling based on ESP and realization of vehicle
d y n a m i c s s i m u l a t i o n m o d e l h a v e b e e n i n t r o d u c e d i n t e n s i v e l y . F i r s t , o b j e c t - o r i e n t e d
modeling theory has been introduced briefly. Object-oriented modeling based on the
t h e o r y o f v e h i c l e d y n a m i c s s y s t e m a n a l y s i s i s d i v i d e d i n t o t h e e n g i n e , t r a n s m i s s i o n ,
steering system, brake system, and the vehicle body. The five parts are analyzed and the
p r o p e r t i e s o f t h e i r r e s p e c t i v e o p e r a t i o n s , a n d d y n a m i c m o d e l , f u n c t i o n a l m o d e l a n d
o b j e c t m o d e l a r e d e l i v e r e d . O n t h i s b a s i s , r e s p e c t i v e l y , s e t u p
m o d els o f t h e f i v e p a r t s i n m at h e m a t i c a l . T h e n, a c c or d i n g t o m a t h e ma t ic a l m o d e l o f
i m p l e m e n t a t i o n b a s e d o n MAT L A B/S I M U L I N K r e a l - t i m e i n t e r a c t i o n o f t h e h u m a n -
computer, ESP vehicle simulation model was implemented.
The simulation system can be set different parameters, so it can be assembled to
d i f f e r e n t v e h i c l e s i m u l a t i o n m o d e l . T h e s i m u l a t i o n p l a t f o r m i n c l u d e s u s e r
i n t e r f a c e m o d u l e , d a t a s t o r a g e m o d u l e , n e t w o r k c o m m u n i c a t i o n m o d u l e , d y n a m i c
computing module, data lines drawing module, and animation display module. The role
of user interface module is vehicle dynamics model parameters setting and operation of
p r o c e s s c o n t r o l . D a t a s t o r a g e m o d u l e i s m a i n l y r e s p o n s i b l e f o r t h e s i m u l a t i o n d a t a
storage. Network communication module is mainly responsible for data communication
b e t w e e n a l l P C m a c h i n e s. D y n a m i c m o d e l i s r u n n i n g o n a s e p a r a t e P C m a c h i n e .
Data lines drawing modul e is ma inly responsible for the key state data curve i n real-
t i m e . A n i m a t i o n d i s p l a y m o d u l e i s m a i n l y r e s p o n s i b l e f o r s h o wi n g t h e ve h i c l e ’s
posture.
F i n a l l y , E f f e c t i v e a n a l y s i s w a s d o n e t h r o u g h e x p e r i m e n t o f t h e m o d e l . T h e
E f f e c t i v e n e s s a n d a c c u r a c y w e r e v e r i f i e d . T h e n t h e a v a i l a b l e p l a t f o r m f o r t h e E S P
testing was established.
K e yWo r d:E S P , ve h i c l e m o d e l i n g,s y s t e m s i m u l a t i o n,s y s t e m
modeling