共查询到19条相似文献,搜索用时 171 毫秒
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多轮转向汽车电液控制系统的研究与开发 总被引:3,自引:0,他引:3
对多轮转向汽车控制系统的组成和结构原理作简单介绍,详细阐述电液控制式多轮转向汽车控制系统硬件设计,并对控制目标和控制方法作了进一步探讨。 相似文献
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比例控制四轮转向车辆运动特性分析 总被引:12,自引:0,他引:12
系统地分析了二自由度四轮转向汽车模型的运动方程,得出了质心侧偏角、横摆角速度与前轮转角的传递函数。在此基础上,对四轮转向样车进行了前后轮转角成比例控制的四轮转向车辆(4WS)的运动学仿真,并针对仿真结果进行了系统的分析。结果阐明了四轮转向车辆与前轮转向车辆(2WS)相比的优势,并提出其发展方向。 相似文献
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四轮转向车辆多体仿真与试验研究 总被引:1,自引:0,他引:1
以四轮转向原理样车为对象,运用多体动力学理论对四轮转向车辆的转向特性进行了计算机仿真研究和试验验证。对建立整车多体模型的方法进行了论述。通过对仿真数据与样车试验结果的对比分析,证明了四轮转向多体模型各类参数和控制方法的正确性和适用性。最后利用建立的整车多体模型,仿真分析了前后悬架刚度对操纵稳定性的影响,以及制动转向时的转向响应特性。 相似文献
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大型工程机械车辆、民用航空特种车辆等大多装有较为复杂的车轮转向控制系统,如二轮转向、四轮转向、蟹行等。本文以Bliss—Fox F350飞机拖车为例,对复杂转向控制系统的工作原理进行分析。 相似文献
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汽车转向机构的优化设计 总被引:5,自引:0,他引:5
本文对由梯形机构和麦弗逊独立悬架构成的汽车转向机构进行优化设计,所用模型是非线性的空间机构运动学模型,具有转向输入角、左转向轮的跳动和右转向轮的跳动三个输入自由度,在优化设计中计入两个权系数,分别考虑不同转向输入带来的误差的影响不同,以及认为转向不足和过度转向的影响也不同。 相似文献
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分析了四轮转向车辆两比例系数对操纵稳定性的影响。建立了四轮转向车辆操纵动力学模型,分析了两比例系数对四轮转向车辆稳定性的影响,得出了车辆横摆角速度和侧向加速度与前轮转角的传递函数,借助Matlab/Simulink,根据四轮转向车辆的两组参数进行仿真分析,并与传统前轮转向车辆进行了比较,结果表明四轮转向车辆两比例系数在操纵稳定性上有各自的优势。研究结果可为评价四轮转向车辆的系统设计和控制律提供理论依据。 相似文献
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PSS后轮随动转向或是4WS四轮转向都不是新名词,不过BMW借着新一代7系的发表发布了一套全主动的后轮转向系统,让我们见识了这套系统对大块头的帮助。放眼未来,Audi的RSQ概念车仿佛在暗示我们未来汽车驱动的方向…… 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(10):1205-1227
The present paper proposes an automatic path-tracking controller of a four-wheel steering (4WS) vehicle based on the sliding mode control theory. The controller has an advantage in that the front- and rear-wheel steering can be decoupled at the front and rear control points, which are defined as centres of percussion with respect to the rear and front wheels, respectively. Numerical simulations using a 27-degree-of-freedom vehicle model demonstrated the following characteristics: (1) the automatic 4WS controller has a more stable and more precise path-tracking capability than the 2WS controller, and (2) the automatic 4WS controller has robust stability against system uncertainties such as cornering power perturbation, path radius fluctuation, and cross-wind disturbance. 相似文献
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Publio Pintado Miguel-Angel Castell 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1999,31(3):137-155
The dynamic behavior of commercial vehicles fitted with differentr types of suspension mechanisms and steering devices is investigated in this paper. Six vehicle models have been constructed: 2WS-SA is a standard two wheel steering bus with solid axles; 2WS-DW is a 2WSA vehicle with independent double wishbone suspension in front and rear axles; SSA-SA is a 2WS system with solid axles, the rear one being mounted on a self steered mechanism; SSA-DW is a vehicle with independent double wishbone suspension in the front axle, and a solid self steered rear axle; 4WS-SA has four wheel steering with solid axles; and 4WS-DW is a 4WS vehicle with independent double wishbone suspension in front and rear axles. The dynamic response of these models has been assessed in terms of lateral acceleration, yaw velocity, tire forces, tire force reserves, and slip angles. The expected advantages of a 4WS system (higher acceleration rates and lower slip angles) will be corroborated but, at the same time, it will be shown that they are obtained at the cost of lower force reserves. Self steered mechanisms produce smaller body slip angles, but it will be shown that they give rise to larger yaw velocity overshootings. The particular independent suspension analyzed does not show significant improvements with respect to the solid axle counterpart. 相似文献
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Design of Optimal Four-Wheel Steering System 总被引:6,自引:0,他引:6
Young H. Cho Graduate Student J. Kim Assistant Professor 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1995,24(9):661-682
Optimal design of the four wheel steering (4WS) system of the ground vehicle is studied. 4WS vehicles with the optimal control scheme are considered first. General formulation of the optimal control law is developed based on the linear quadratic regulator theory. The vehicle speed function (VSF) based 4WS vehicle with a simple feedback controller is considered as a special case of the optimal system. Two new designs of the VSF 4WS system are proposed and their performances are compared with the optimal 4WS systems and the existing VSF 4WS system. The first system is designed for the maximum stability while the second system is designed to emulate the response of the optimal 4WS vehicle. Advantages of the new VSF designs are discussed. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):661-682
SUMMARY Optimal design of the four wheel steering (4WS) system of the ground vehicle is studied. 4WS vehicles with the optimal control scheme are considered first. General formulation of the optimal control law is developed based on the linear quadratic regulator theory. The vehicle speed function (VSF) based 4WS vehicle with a simple feedback controller is considered as a special case of the optimal system. Two new designs of the VSF 4WS system are proposed and their performances are compared with the optimal 4WS systems and the existing VSF 4WS system. The first system is designed for the maximum stability while the second system is designed to emulate the response of the optimal 4WS vehicle. Advantages of the new VSF designs are discussed. 相似文献
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A Review of Four-Wheel Steering Studies from the Viewpoint of Vehicle Dynamics and Control 总被引:8,自引:0,他引:8
Yoshimi FURUKAWA Naohiro YUHARA Shoichi SANO Hideo TAKEDA Yoshinobu MATSUSHITA 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1989,18(1):151-186
As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicledynamics and control techniques. Based on the findings of this investigation, the report gives an outline and perspective of the research areas involved. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(1-3):151-186
SUMMARY As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicledynamics and control techniques. Based on the findings of this investigation, the report gives an outline and perspective of the research areas involved. 相似文献