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Abstract: The
quantity description method of human thinking fuzziness is introduced in
the evaluation index of handling and stability of driver/vehicle/road
closed-loop system. The ftizzy cognition of driver on prediction
distance is firstly introduced in the evaluation index of driver/vehic!e/road
closed-loop system. Then, the objective analysis and reasoning are
conducted, Finally, the possibility distributed set and its three
explicit expressions of the fuzzy evaluation on handling and stability
of driver/vchicle/road closed-loop system are given. The optimization
and simulation experiment are conducted on the basis of (he theoretical
analysis. The results show that the upper and lower bounds of fuzzy
possibility distribution interval of the lateral displacement response
are distinct as the confident level on fuzzy set "long prediction
distance" is of larger. And the tracking performance of fuzzy
possibility distribution interval of the lateral displacement response
to desired path is good. The upper and lower bounds of fuzzy possibility
distribution interval of the lateral displacement response have a cross
point as the confident level on fuzzy set "long prediction distance" is
of smaller. And the tracking performance of the upper bound of fuzzy
possibility distribution interval of the lateral displacement response
to desired path is good. The tracking performance of lower bound of
fuzzy possibility distribution interval of the lateral displacement
response to desired path is bad. The contribution of this study is that
the effect of subject factor to object evaluation index is developed,
and the mathematical description of the effect is given.
Key words: Driver/vehicle/road
Handling stability Fuzzy evaluation Simulation
CLC No: U461.6
汽车动态模拟国家重点实验室开放基金与国家自然科学基金资助项目(59975041). Received 20010604, received in
revised form 20020730 |