探讨影响军用越野汽车爬坡能力的主要因素

本文从汽车动力传动系配置和地面附着力两个方面来探讨影响军用越野汽车爬坡能力的主要因素,并结合某款车型改装后进行爬坡试验的案例进行分析计算,充分检验了上述两个方面在军用越野汽车爬坡过程中的影响,给改装厂家在进行整车改装时提供了计算参考。     

SX2190左右托架零件冷压成形主要参数的计算及模具结构特点

本文通过对ＳＸ２１９０军用越野汽车左右托架零件冷压成形主要参数的计算，确定了展开的毛坯尺寸及工序设备；并阐述了主要模具的结构特点。     

某军用越野汽车传动系统设计

传动系作为军用越野汽车重要的组成部分,匹配好坏影响车辆系统的动力性和燃油经济性的好坏。文章将对某军用越野汽车的传动系统进行设计、选型匹配及强度校核,为车辆的研制提供依据。     

汽车轮胎中央充放气系统在我国的发展和应用

1前言越野汽车轮胎中央充放气系统（CTI／DS—CentralTireInflation／DeflationSystem）是指装在轮式车辆上由压力源、控制与显示装置、旋转密封气室、轮胎阀及相应的管路等一系列装置和部件组成的，用于监测、调节轮胎气压的系统。究其发明的初衷，是为了提高军用越野汽车在松软的沙滩上行驶的通过能力。但发展至今，尤其是在美国，它在民用车辆上的应用广泛程度甚至超过了它在军用越野汽车上的应用程度。现在，人们越来越认识到轮胎中央充放气系统在提高越野汽车的通过性以及其它方面所带来的一系列好处，并将其认为是越野汽车现代化…     

东风"猛士"高机动性越野汽车设计方法创新

根据第3代高机动性越野汽车性能要求,东风汽车公司针对军用越野汽车发动机性能、优化转向设计、汽车通过性参数系统化、精确确定传动系设计载荷、主要承载件的扭转刚度量化分配等5个方面进行了汽车设计理念的创新,开发出了东风"猛士"高机动性越野汽车.东风"猛士"越野汽车越野行驶最大平均车速比第2代军用越野汽车提高30%.     

越野车主动悬架控制策略研究

汽车悬架的主动控制非常困难,特别是要处理越野汽车的舒适性和操纵性。越野汽车的悬架位移量非常大,非线性时变特性和阻尼特性非常显著。一种能提高主动悬架系统的效率的方法是：保留线性控制方法的优点。同时用线性回馈方法识别并取消非线性特性。文中简略介绍了主动悬架的控制策略和军用越野汽车的一种控制方法。     

军用越野车越野性能分析

详细论述军用越野汽车在不同路面上行驶时影响其通过能力的因素,以及提高其通过能力的措施,并指出在提高军用越野汽车越野性能的同时,应尽量减少军用越野汽车的制造成本和维修、保养成本。     

某型军用越野汽车装配电磁风扇离合器后冷却系统计算

本文通过对某型军用越野汽车装配电磁风扇离合器后冷却系统冷却能力的校核计算,并比较装配电磁风扇离合器、硅油风扇离合器及刚性风扇后整车的使用经济性,对重型车辆风扇选型提供依据。     

SX4400半挂牵引车冷却系统的设计计算

本文对SX4400军用越野半挂牵引车的液压驱动冷却系统进行了详尽的分析及计算,为SX4400型军用越野半挂牵引车冷却系各总成的设计提供理论依据。     

某型军用越野汽车驾驶室高原适应性设计

文章主要讲述了某型军用越野汽车车驾驶室的高原环境适应性分析与设计。首先查阅了高原地区的海拔高度、温度、紫外线强度等环境特征,其次针对各项环境特征与军用越野汽车特殊要求设计对应解决方案。     

SX5624ZPV364非公路自卸车的悬挂系统侧倾角分析及计算

本文对SX5624ZPV364非公路自卸车的悬挂系统的侧倾角刚度进行了详尽的分析及计算,为SX5624ZPV364非公路自卸车悬挂系各总成的设计提供理论依据。     

动载荷作用下客车轮胎侧偏刚度的估算

侧偏刚度是决定操纵稳定性的重要参数。从轮胎模型和运动分析、整车运动和受力分析两方面介绍了客车动力学模型。探讨了如何估算动载荷作用下客车的侧偏刚度,并以国产SX6120A型豪华大客车为例,仿真得到了轮胎的侧偏刚度。     

重型越野汽车动力性能计算软件的开发

以Delphi为开发平台,根据重型越野汽车的特点,通过软件程序对其动力性能指标进行了设计计算,并实现了用Word文档输出其设计结果,从而提高了计算的准确性和设计效率。该程序化的编程方法可以为类似软件开发提供参考,具有一定的实用价值。     

Fuzzy Logic Active and Semi-Active Control of Off-Road Vehicle Suspensions

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.     

某重型越野汽车驾驶室后悬置有限元分析及改进

本文以ANSYS软件为工具,对某型号越野汽车驾驶室后悬置支架进行受力分析,详细准确地确定了汽车驾驶室后悬置支架的受力情况和应力分布部位,依托分析结果对支架结构进行优化,达到降低驾驶室后悬置支架关键部位应力的目的,并通过实际试验进行验证,结果显示优化后的支架有效地改善了关键部位的应力,解决了支架断裂问题,提高了整个驾驶室悬置系统的可靠性能。     

Fuzzy Logic Active and Semi-Active Control of Off-Road Vehicle Suspensions

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.     

实测轻型货车轮载作用下沥青路面力学响应分析

作者利用自己实测的轮胎接地压力分布,用三维有限元方法分析了轻型货车不同轮胎,在不同胎压和不同负荷作用下,沥青路面结构层的力学响应。结果表明:实际的轮胎接地压力分布具有明显的非均匀性,且随轮胎的结构类型、花纹、胎压、负荷甚至使用年限的不同而有很大的差异。轻型货车对路面结构产生的应力响应不能忽视。     

Integrated Control of Active Rear Wheel Steering and Direct Yaw Moment Control

An integrated control system of active rear wheel steering (4WS) and direct yaw moment control (DYC) is presented in this paper. Because of the tire nonlinearity that is mainly due to the saturation of cornering forces, vehicle handling performance is improved but limited to a certain extent only by steering control. Direct yaw moment control using braking and/or driving forces is effective not only in linear but also nonlinear ranges of tire friction circle. The proposed control system is a model matching controller which makes the vehicle follow the desired dynamic model by the state feedback of both yaw rate and side slip angle. Various computer simulations are carried out and show that vehicle handling performance is much improved by the integrated control system.     

Integrated Control of Active Rear Wheel Steering and Direct Yaw Moment Control

SUMMARY

An integrated control system of active rear wheel steering (4WS) and direct yaw moment control (DYC) is presented in this paper. Because of the tire nonlinearity that is mainly due to the saturation of cornering forces, vehicle handling performance is improved but limited to a certain extent only by steering control. Direct yaw moment control using braking and/or driving forces is effective not only in linear but also nonlinear ranges of tire friction circle. The proposed control system is a model matching controller which makes the vehicle follow the desired dynamic model by the state feedback of both yaw rate and side slip angle. Various computer simulations are carried out and show that vehicle handling performance is much improved by the integrated control system.