In order to improve non-road driver's seat ride comfort, a semi-active suspension seat based on air spring attached with auxiliary chamber and MR damper was designed and manufactured. The seat suspension stiffness and damping were controlled by proportional valve input voltage and MR damper input current. The experimental system of seat suspension was established. The effects of actuating frequency, proportional valve input voltage and MR damper input current on the vibration characteristics of seat were experimentally studied. The results show that, the natural frequency, dynamic amplification factor and acceleration root of mean square of seat suspension will decrease with the increase of proportional valve input voltage. The influence of MR damper input current on the acceleration root of mean square is greater at high excitation frequency.%为改善非公路驾驶员座椅的乘坐舒适性,设计制造了一种基于带附加气室空气弹簧和磁流变减振器的半主动悬架座椅.通过控制比例阀输入电压和磁流变减振器输入电流调节座椅悬架系统的刚度和阻尼,构建了座椅的振动特性实验系统.试验研究了激励频率、比例阀输入电压及磁流变减振器输入电流对座椅振动特性的影响规律.研究结果表明,座椅悬架的固有频率、位移传递率及加速度均方根值均随比例阀输入电压的增大而减小；在高频振动区,磁流变减振器的输入电流对加速度均方根值影响较大.
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