Magneto-rheological active seat suspension for heavy vehicles

重型车辆驾驶员暴露在振动和冲击载荷下，这些振动和冲击载荷来自于粗糙的道路条件，这些条件通过驾驶员座椅悬架传递。这些振动对司机的健康有害，因为它们增加了腰痛、坐骨痛和脊柱系统退行性变化的风险。目前用于重型车辆的被动座椅悬架的性能受到静态刚度和动态顺应性之间的基本设计权衡的限制；因此，被动式座椅悬架可能不符合ISO 2631-1振动暴露标准。使用主动悬架系统可以实现更大的减振，其中使用致动器而不是阻尼器来衰减传递给驾驶员的振动。两种市售的主动座椅悬架采用液压或电磁执行器来衰减传递给驾驶员的振动。然而，液压致动器功耗大，电磁致动器重量大，价格昂贵。本研究旨在评估一种新型机电致动器作为重型车辆主动座椅悬架的低成本、轻量化和有效解决方案的可行性。在过去的研究中，这种执行器已经证明是一种可靠、轻便和经济的替代液压执行器用于航空航天飞行器的主要飞行控制和电磁执行器用于涉及大力和位移的动态应用。

Heavy vehicle drivers are exposed to vibrations and shock loads originating from the rough road conditions that are transmitted through the driver's seat suspension. These vibrations are harmful to the driver's health as they increase the risk of lower back pain, sciatic pain and degenerative changes in the spinal system. The performance of the passive seat suspensions currently used in heavy vehicles is limited by a fundamental design trade-off between static stiffness and dynamic compliance; as a result, passive seat suspensions may fail to comply with ISO 2631-1 vibration exposure standard. Much larger vibration reduction is achievable using active suspension systems, where actuators are used instead of dampers to attenuate vibrations transmitted to the driver. The two commercially available active seat suspensions use either hydraulic or electromagnetic actuators to attenuate the vibration transmitted to the driver. Nonetheless, hydraulic actuators consume large amount of power and electromagnetic actuators are heavy and expensive. This research aims at assessing the feasibility of a novel electromechanical actuator as a low cost, lightweight and effective solution for active seat suspensions of heavy vehicles. Such actuators have demonstrated in past research to be a reliable, lightweight and cost-effective alternative to hydraulic actuators for primary flight control of aerospace vehicles and to electromagnetic actuators for dynamic applications involving large forces and displacements.