【摘要】 针对汽车在不平路面行驶时产生的振动会损伤汽车部件和影响乘客舒适性的问题,提出一种含时滞反馈控制的主动悬架在1/4车模型中的减振方法。该悬架模型有3个自由度,由乘客质量、车身质量和簧下质量3部分组成。通过异步学习因子粒子群算法确定时滞控制参数,并将控制参数运用频域扫描法进行稳定性分析,最后建立含时滞反馈控制的主动悬架系统的仿真模型。仿真结果表明,与被动悬架相比,含时滞反馈的控制主动悬架无论在简谐激励还是路面激励下,乘客和车身加速度的均方根值都有明显降低,具有较好的减振效果。含时滞反馈的控制主动悬架在改善乘坐舒适性和行驶平顺性方面具有优越性。更多还原

【Abstract】 Aiming at the problem that the vibration produced by the vehicle driven on uneven road can damage the vehicle parts and affect the passengers comfort, thus a vibration reduction method of active suspension with time-delay feedback control in a 1/4 vehicle model was proposed. The suspension model had three degrees of freedom, which consisted of three parts: passenger mass, body mass, and unsprung mass. By particle swarm optimization of asynchronous acceleration coefficient, the time delay control parameters were determined, and the stability of the control parameters was analyzed by using the frequency sweeping method. At last, the simulation model of the active suspension system with the time delay feedback control was built. The simulation results show that compared with the passive suspension, whether it is under the simple harmonic excitation or on the road excitation, the RMS values of the accelerated speed of the passengers and the body are significantly reduced with the active suspension with time-delay feedback control, sowing a better vibration reduction effect. The active suspension with time delay feedback control show advantages in improving ride comfort and ride smooth.更多还原