转向架悬挂系统螺旋压缩钢弹簧关键参数设计探讨

文章结合机车车辆设计的实例,对其一、二系悬挂系统中的螺旋压缩钢弹簧设计过程中几个关键参数的选择和设计方法进行了探讨。     

Switched control of vehicle suspension based on motion-mode detection

This paper presents a study on switched control of vehicle suspension based on motion-mode detection. This control strategy can be potentially implemented via the interconnected suspension such as hydraulically interconnected suspension by actively switching its interconnection configuration in terms of the dominant vehicle body motion-mode. The design of the switched control law is developed focusing on three vehicle body motion-modes: bounce, pitch, and roll. At first, an H_∞ optimal controller will be designed for each motion-mode with the use of a common quadratic Lyapunov function, which guarantees the stability of the switched system under arbitrary switching functions. Then, a motion-mode detection method based on the calculation of the motion-mode energy is introduced. And then, the possible implementation of the control system in practice is discussed. Finally, numerical simulations are used to validate the proposed study.     

客车空气悬架系统结构及安装调试工艺

介绍了普通客车空气悬架系统的基本结构和安装调试工艺，阐述了安装调试过程中应注意的几个问题。     

主跨218 m三塔自锚式悬索桥体系转换方案

银川滨河黄河大桥主桥采用三塔双索面组合梁自锚式悬索桥,跨径布置为(88+218+218+88)m。为安全、高效地实现体系转换,需要选择合理的吊索张拉方案。综合考虑施工过程中各控制因素,对此三塔自锚式悬索桥吊索张拉方案进行研究。经计算分析,所选体系转换方案满足施工过程中各工序的技术标准。     

高位斜置双叉臂独立悬架力传导机构的开发与应用

针对某车型双叉臂独立悬架在前期实际道路试验中出现的车身安装板开裂问题，基于零部件受力分析及CAE仿真，找出问题真正原因并提出两种解决方案。通过仿真分析和道路验证，最终确定采用力传导机构，比较巧妙地解决了开裂问题。     

Linear matrix inequality based control of vehicle active suspension system

Linear matrix inequality (LMI) methods, novel techniques in solving optimisation problems, were introduced as a unified approach for vehicle's active suspension system controller design. LMI methods were used to provide improved and computationally efficient controller design techniques. The active suspension problem was formulated as a standard convex optimisation problem involving LMI constraints that can be solved efficiently using recently developed interior point optimisation methods. An LMI based controller for a vehicle system was developed. The controller design process involved setting up an optimisation problem with matrix inequality constraints. These LMI constraints were derived for a vehicle suspension system. The resulting LMI controller was then tested on a quarter-car model using computer simulations. The LMI controller results were compared with an optimal PID controller design solution. The LMI controller was further tested by incorporating a nonlinear term in the vehicle's suspension model; the LMI's controller degraded response was enhanced by using gain-scheduling techniques. The LMI controller with gain-scheduling gave good results in spite of the unmodelled dynamics in the suspension system, which was triggered by large deflections due to off-road driving.     

采用永磁悬挂体的磁悬浮系统建模与系统设计方法

为降低悬浮系统的功耗，提高悬浮品质，建议在吸力型破悬浮系统中采用永磁材料做悬挂体。文中给出了这种系统的建模方法，阐述了系统设计的原理。     

宜昌伍家岗长江大桥隧道锚设计与研究

宜昌伍家岗长江大桥为(290+1160+402)m双塔简支钢箱梁悬索桥,江北侧为国内千米级悬索桥首次在软岩上修建隧道锚。通过地质钻孔、室内试验、斜硐勘探、原位试验等多种方式研究确定合理的岩体力学参数进行隧道锚设计。隧道锚轴线长90 m,其中锚塞体段长45 m,倾斜角度为40°;前锚面尺寸为9.04 m×11.44 m,后锚面尺寸为16 m×20 m。通过室内模型试验和现场缩尺模型试验,结合数值模拟分析掌握隧道锚与围岩的破坏变形模式和流变特征,确定隧道锚的承载力为8P,保证了结构的安全稳定。     

上海地铁车辆二系悬挂系统的改进

介绍了上海地铁车辆二系悬挂系统的组成及其高度调节阀工作原理,指出高度调节阀的设计缺陷,并提出了车辆二系悬挂系统的改进措施。     

液压进口节流带背压的节流调速回路速度刚度分析

本文对进口节流带背压的调速回路的速度刚度进行了静态和动态分析，从而得到这种回路速度刚度的特性。