Page Test应用于瞬态变化检测时的性能计算

Page Test是针对变化检测的一种常用方法。一般来说，我们用平均运行时间长度来描述Page Test方法的性能，这对稳态变化检测来说是合理的，但对于瞬态变化检测而言则显得不够完善；针对此种不足，提出了一种基于快速傅立叶变换的FFT，它可以以很高的精度计算Page Test检测瞬态变化时的虚警和检测概率。最后通过数值仿真表明，FFT法能很好地描述Page Test方法的性能。     

大型船舶综合减摇系统的研究

本文在分析船舶的综合减摇问题以及船舶主要减横摇装置的优缺点的基础上,针对船舶的减横摇问题,兼顾船舶的静倾问题,提出了可应用于全工况下的船舶综合减摇系统.综合减摇系统是由减摇鳍、减摇水舱和抗静倾平衡水舱组成的.这种综合减摇系统既综合了鳍与水舱的优点,又克服了减摇鳍和减摇水舱各自的缺陷.以高速滚装船为例,建立了"船舶-减摇鳍-被动式U型水舱"系统的运动方程并进行了计算机仿真.通过对仿真结果的讨论和分析得到如下结论:这种综合减摇系统具有良好的减摇能力;在各种航态下(包括零航速)都能达到减摇要求;综合减摇系统的减摇性能远远好于单独使用减摇鳍和减摇水舱的性能.船舶综合减摇系统的提出为大型船舶的综合平衡开辟了新途径,这种设计方法对大型水面舰船、尤其对有舰载机的船舶及两栖作战舰船的综合减摇具有重要意义.     

Control of semi-active anti-roll systems on heavy vehicles

Semi-active anti-roll systems, with a high and low roll stiffness, or, since cornering is typically a transient event, damping setting have the capacity to improve heavy vehicle stability while having very low power consumption. If a vehicle is travelling around a right-hand bend and a low roll damping setting is selected, the vehicle will roll outwards. If a high damping setting is then selected, the outward roll will be locked-in. When the vehicle enters a left-hand bend, the inward roll becomes locked-in. This has the potential to increase critical lateral acceleration by up to 12.5% if the vehicle's future course can be predicted accurately (e.g. with a Global Positioning System). However, if the vehicle does not follow the expected path, the critical lateral acceleration may be degraded. Exploiting the delay between a steer angle being applied and the lateral acceleration developing could avoid this problem. However, the benefits from such a system are considerably lower, up to a 2.4% improvement in critical lateral acceleration. Hence, a ‘modal control strategy’ is developed aimed at providing high levels of benefit while being robust to deviations from the expected path. The modal strategy is able to provide benefits of up to 11%, while being robust to most deviations.     

Active roll control for rollover prevention of heavy articulated vehicles with multiple-rollover-index minimisation

This paper presents the application of a nominal control design algorithm for rollover prevention of heavy articulated vehicles with active anti-roll-bar control. This proposed methodology is based on an extension of linear quadratic regulator control for ‘state derivative-induced (control coupled) output regulation’ problems. For heavy articulated vehicles with multiple axles, a performance index with multiple rollover indices is proposed. The proposed methodology allows us to compare the usefulness of various control configurations (i.e. actuators at different axles of the vehicle) based on the interaction of this control configuration with vehicle dynamics. Application of this methodology to a specific heavy articulated vehicle with a tractor semi-trailer shows that a single active anti-roll-bar system at the trailer unit gives better performance than multiple-axle actuators at tractor and trailer together with the single lane change manoeuvre as the external disturbance. Thus, the proposed methodology of this paper not only highlights the importance of the interactions between control and vehicle dynamics in rollover prevention problems but, in fact, proposes a novel technique to exploit the benefits of these interactions judiciously.     

基于多维视图的战场控制技术研究

战场控制经常运用于军事过程中。随着军事体系和电子技术的发展,基于多维视图的战场控制软件技术开始被研究。论文主要讨论利用态势图、甘特图和执行矩阵视图研究用于战场控制的软件技术。     

抗侧滚吊杆刚度对悬浮架静浮能力的影响

文章着重分析了中低速磁浮车辆起浮前后抗侧滚片梁吊杆的受力情况,并结合在单模块悬浮架试验台上进行的不同刚度吊杆对比试验,对比分析了刚性吊杆和弹性吊杆对悬浮架静态起浮能力的影响．为抗侧滚吊杆的设计与改进提供了建议与参考。     

液压互联悬架抗侧倾控制研究（双语出版）

针对车辆减少能量消耗与提高抗侧倾能力需求,提出了一种主/被动可切换的液压互联悬架抗侧倾控制方法。基于9自由度车辆动力学模型,考虑蓄能器、液压缸、液压泵三者之间耦合的体积-流量-压力特性,建立液压互联悬架主动控制时域模型;结合"车身侧倾角-车身侧倾角速度"相平面法及车辆侧向加速度,得到车辆侧倾稳定域,并提出液压互联悬架系统侧倾稳定性控制介入与退出判据;在此基础上,采用Backstepping非线性控制算法设计主动液压互联抗侧倾控制器。最后,分析并改进侧倾稳定性评价指标,通过在MATLAB/Simulink环境下进行高速双移线、鱼钩试验等极端工况数值仿真,验证所提出的液压互联悬架主/被动切换控制系统能在减少能量消耗的情况下能否提高车辆抗侧翻的能力。研究结果表明：所提出的控制系统能有效提高车辆抗侧翻能力;当车辆侧倾状态超出设定的侧倾稳定区域介入线时,液压互联悬架系统由被动模式切换为主动抗侧倾模式,控制车辆侧倾状态回到稳定区域,以提高车辆侧倾稳定性;当判定车辆侧倾状态满足主动控制退出条件时,液压互联悬架系统回到被动模式,以减小能量消耗。     

低速磁浮列车防侧滚吊杆运动学研究

针对磁浮列车位于弯道时防侧滚吊杆运动学问题,以单转向架为研究对象,基于D-H变换建立转向架正向运动学方程。结合轨道弯道线型的特征参数,分析磁浮列车通过弯道时悬浮模块的相对位姿关系,通过求解运动学模型的逆解,计算当车辆通过弯道时防侧滚吊杆的运动情况。考虑磁浮列车在实际运行过程中间隙波动的问题,分析防侧滚吊杆满足解耦要求的运动学条件,最终为防侧滚吊杆的结构设计与改进提出建议,对低速磁浮列车防侧滚吊杆的分析和设计具有参考价值。     

380km／h动车组用抗侧滚扭杆系统的研制

介绍了一种380km／h动车组抗侧滚扭杆系统的设计、计算和生产制作。试验表明该抗侧滚扭杆系统的结构、刚度、强度及制作工艺等完全满足青岛四方股份公司相关技术规范要求和该380km／h动车组车辆的运用要求。经过1000万次疲劳试验,该装置未发生任何问题。