悬架, 随机最优控制, 随机动载荷, 疲劳可靠度

Using the theory of random vibration and random optimal control, a calculation method of statistical law of random dynamic load on suspension parts for the two-degree vehicle model was deducted. The probability model of random dynamic load under variational velocity of the vehicle was established. An analysis method of the dynamic fatigue reliability of suspension parts based on random optimal control was proposed. The simulation results show that the random dynamic load on the active suspension parts is in evidence bigger than that on the passive suspension parts, and that the dynamic fatigue reliability of the active suspension parts in use is smaller than that of the passive suspension parts. This illuminates that the reliability of the active suspension parts is reduced than that in the passive suspension parts.

suspension, random optimal control, random dynamic load, fatigue reliability