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本文系统介绍了半主动悬架的研究进展,主要类型及控制原理,分析了半主动悬架控制技术,探讨了半主动悬架未来的研发趋势。 相似文献
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基于车辆动力学理论与方法,以车辆悬架系偏频特性及其相关参数为分析变量,依据平顺性要求对前后悬架的匹配关系进行分析探讨。建立适用于车辆行驶中与平顺性相关的基本分析模型,模型中以垂向振动频率和俯仰振动频率为评价指标。分析中将车身视为缸体,针对空载、满载等工况、分析不同条件时匹配的条件以及匹配参数的大致范围。依据所建模型与相关分析,对某款国产车辆的前后悬架系的偏频进行分析优化匹配。优化结果和实验结果相比较,说明了所用方法与结论具有一定的实用价值。 相似文献
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车辆悬架系统是保证车辆操纵稳定性和舒适性的重要部件,电子控制悬架系统相对传统被动悬架系统能大幅度提高车辆的上述性能。在对电子控制悬架系统做了相关研究的基础上,介绍了电子控制悬架系统的功能和类型,分析了它的基本工作原理,着重论述以现代控制理论为核心的电控悬架系统的控制方法。 相似文献
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从悬架系统与整车匹配提升车辆平顺性研究角度出发,给出匹配过程推导方法.并以某全驱危险品运输车为研究对象,在满足整车悬架结构及功能要求前提下,用提出的推导方法验证悬架设计与整车底盘匹配度.并针对特种车辆底盘设计给出悬架与整车平顺性设计评价标准,为提升特种车辆平顺性研究提供指导. 相似文献
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重型越野车辆油气悬架的设计 总被引:6,自引:0,他引:6
由于油气悬架具有能提高车辆在非公路路面上的行驶平顺性的良好特性,愈来愈广泛地运用在大型工矿用自卸车和军用越野车辆上。介绍了油气悬架的特点。因内外的应用状况,油气弹簧及悬架的数学模型和设计研究方法,以及设计中的一些特殊问题。 相似文献
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汽车悬架系统的性能直接影响汽车的行驶平顺性.文中以1/4汽车双质量悬架系统为对象,确定其3个性能指标目标函数;基于数学软件Mathematica生成目标函数的3D曲面图和数值表,显示出目标函数的变化趋势;分析悬架参数对目标函数的影响,研究悬架系统性能指标目标函数的变化规律,从而针对不同车型选择不同的悬架参数匹配,指导参... 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4-5):253-266
SUMMARY Recent developments in off-road vehicle dynamics are reviewed. Progress on this topic and the application of new techniques to the particular problemsassociated with off-road operation tend to lag behind practices established for road vehicles. The factor which limits further progress is the lack ofappropriate off-road tyre data, in particular, on vibrational and lateral force generation characteristics. Also, a long term study should be aimed at understanding the dynamic behaviour of tyres on yielding surfaces. 相似文献
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Off-Road Vehicle Dynamics 总被引:1,自引:0,他引:1
D. A. Crolla 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1981,10(4):253-266
Recent developments in off-road vehicle dynamics are reviewed. Progress on this topic and the application of new techniques to the particular problemsassociated with off-road operation tend to lag behind practices established for road vehicles.
The factor which limits further progress is the lack ofappropriate off-road tyre data, in particular, on vibrational and lateral force generation characteristics. Also, a long term study should be aimed at understanding the dynamic behaviour of tyres on yielding surfaces. 相似文献
The factor which limits further progress is the lack ofappropriate off-road tyre data, in particular, on vibrational and lateral force generation characteristics. Also, a long term study should be aimed at understanding the dynamic behaviour of tyres on yielding surfaces. 相似文献
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水陆两栖汽车是既可以在陆地上行驶又可以在水面航行的车辆装备,具有广阔的应用空间和发展前景。世界上首辆水陆两栖汽车早在1940年左右就出现了,并在第二次世界大战中被广泛地应用于后勤军用物资的运输和补给,但战后其被新兴的运输艇(船)等装备所取代,其中的一个重要原因是传统的水陆两栖汽车在水上的航速只能达到约10km/h,较低的极限航速制约了其在部队和国民经济各部门中的广泛应用。 相似文献
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D. N. L. Horton D. A. Crolla 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1986,15(6):351-372
A theoretical analysis is presented to model a hydromechanical, semi-active suspension system, first as a single wheel station and then as fitted to each wheel of an off-road vehicle. Predicted results show that two benefits are obtained by comparison with the equivalent passive system. First, vehicle attitude is controlled for changes in body forces arising from static loads or braking/cornering inputs. Second, a significant improvement in ride comfort is obtained because low suspension stiffnesses can be used. 相似文献
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Reza Kashani Joseph E. Strelow 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1999,32(4):409-420
For off-road vehicles, minimizing the absorbed power is the main objective of suspension control. The primary cause of increase in the absorbed power in off-road vehicles driven at high speeds on harsh courses is the exhaustion of the suspension travel. Fuzzy-logic approach to active and semi-active off-road vehicle suspension control, with the goal of improving the speed of the vehicle over rough terrains are developed. The ride metric used for quantifying improvements is the absorbed power of the sprung mass. Particular attention is paid to the proper modeling of the suspension using both the full kinematic constraints and the more convenient two degree of freedom linear model of the quarter vehicle suspension. The nonlinearities due to the kinematic constraints on motion are accounted for by modifying the stiffness and damping coefficients of the suspension spring and dashpot in the linear model. The control laws are developed using the less complex model and demonstrated in the fully constrained environment. Nonlinearities of the suspension, including tire stiffness/damping and bumpstops are included at all stages of controller development. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4-5):409-420
For off-road vehicles, minimizing the absorbed power is the main objective of suspension control. The primary cause of increase in the absorbed power in off-road vehicles driven at high speeds on harsh courses is the exhaustion of the suspension travel. Fuzzy-logic approach to active and semi-active off-road vehicle suspension control, with the goal of improving the speed of the vehicle over rough terrains are developed. The ride metric used for quantifying improvements is the absorbed power of the sprung mass. Particular attention is paid to the proper modeling of the suspension using both the full kinematic constraints and the more convenient two degree of freedom linear model of the quarter vehicle suspension. The nonlinearities due to the kinematic constraints on motion are accounted for by modifying the stiffness and damping coefficients of the suspension spring and dashpot in the linear model. The control laws are developed using the less complex model and demonstrated in the fully constrained environment. Nonlinearities of the suspension, including tire stiffness/damping and bumpstops are included at all stages of controller development. 相似文献
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R. G. Langlois R. J. Anderson 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1995,24(1):65-97
The potential performance improvement using preview control for active vehicle suspension was first recognized in the late nineteen sixties. All work done since that time has been based on optimal control theory using simple vehicle models.
In this article, the performance of quarter vehicle preview controllers when applied to a real off-road vehicle is simulated using both two degree of freedom quarter and ten degree of freedom full vehicle models. The results, which are compared with non-preview active and conventional passive suspensions, confirm that preview control reduces vertical acceleration of the body centre of gravity, which results in improved ride quality. Further, reductions in pitch and roll motion result from smaller vertical displacements of the vehicle quarters. Coupling between quarters, through the vehicle body, appears to have a smoothing effect on the control.
As an alternative to optimal control theory based controllers, a simple ad hoc preview controller based on isolating the vehicle body from dynamic loads transmitted through the suspension is proposed. Simulation results show that such a controller outperforms the optimal control theory based controllers over small discrete disturbances but responds poorly to disturbances encountered from other than steady state. 相似文献
In this article, the performance of quarter vehicle preview controllers when applied to a real off-road vehicle is simulated using both two degree of freedom quarter and ten degree of freedom full vehicle models. The results, which are compared with non-preview active and conventional passive suspensions, confirm that preview control reduces vertical acceleration of the body centre of gravity, which results in improved ride quality. Further, reductions in pitch and roll motion result from smaller vertical displacements of the vehicle quarters. Coupling between quarters, through the vehicle body, appears to have a smoothing effect on the control.
As an alternative to optimal control theory based controllers, a simple ad hoc preview controller based on isolating the vehicle body from dynamic loads transmitted through the suspension is proposed. Simulation results show that such a controller outperforms the optimal control theory based controllers over small discrete disturbances but responds poorly to disturbances encountered from other than steady state. 相似文献
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本文根据变刚度螺旋弹簧在重型越野车上的工程应用,及其加工工艺,设计了变刚度螺旋弹簧的型式、结构及特性参数。 相似文献