This paper presents the damping characteristics of a linear magneto-rheological (MR) damper with dual controllable ducts based on numerical and experimental analysis. The novel MR damper consisting of a dual-rod cylinder system and a MR valve is used to reduce the influences of viscous damping force and improve dynamic range. Driven by the dual-rod cylinder system, MR fluid flows in the MR valve. The pressure drop of the MR valve with dual independent controllable ducts can be controlled by tuning the current of two independent coils. Based on the mathematical model and the finite element method, the damping characteristics of the MR damper is simulated. A prototype is designed and tested on MTS machine to evaluate its damping characteristics. The results show that the working states and damping force of the MR damper can be controlled by the two independent coils.

本文基于数值和实验分析，提出了一种具有双可控风道的线性磁流变（MR）阻尼器的阻尼特性。由双杆气缸系统和MR阀组成的新型MR阻尼器用于减少粘性阻尼力的影响并改善动态范围。在双杆气缸系统的驱动下，MR流体在MR阀中流动。具有两个独立可控管道的MR阀的压降可通过调节两个独立线圈的电流来控制。基于数学模型和有限元方法，对MR阻尼器的阻尼特性进行了仿真。在MTS机器上设计并测试了原型，以评估其阻尼特性。