共查询到20条相似文献,搜索用时 140 毫秒
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根据车辆悬架最佳阻尼匹配要求,利用开阀流量、压力和阀片变形之间的关系,建立基于车辆参数的油气弹簧阀系参数设计公式.利用等效厚度和应力计算公式,建立了油气弹簧叠加阀片和调整垫圈厚度设计方法.通过实例,对油气弹簧阀系参数进行了设计,对设计参数进行验证,并对所设计油气弹簧进行了阻力特性试验.结果表明,基于车辆参数的油气弹簧阀系参数设计方法是正确的,对油气弹簧设计具有一定参考价值. 相似文献
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带反压气室油气弹簧悬架的研究 总被引:1,自引:0,他引:1
介绍了带反压气室油气弹簧悬架的结构、工作原理、弹性特性、刚度特性、自由振动频率特性及阻尼特性等,并通过台架性能试验、装车性能试验及振动加速度测试,证明了这种油气弹簧性能稳定可靠,寿命长,减振性能好. 相似文献
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斜拉索磁流变智能阻尼控制系统分析与设计 总被引:7,自引:2,他引:7
在结构主动、半主动和智能控制系统优化设计方法的基础上,研究了斜拉索磁流变智能阻尼控制系统的设计方法,并采用所建立的设计方法完成了山东滨州黄河公路大桥斜拉索磁流变智能阻尼减振系统的优化设计。采用限界HROVAT最优控制算法确定磁流变阻尼器的半主动控制力,数值计算了斜拉索磁流变阻尼控制系统的风振反应。进一步分析比较了主动控制、半主动控制、Passive-on被动控制和Passive-off被动控制策略下的磁流变阻尼器控制斜拉索风致振动的控制效果,验证了磁流变阻尼器优化设计方法的正确性和磁流变阻尼器控制策略的有效性。 相似文献
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磁流变液是一种新型智能材料,属于可控流体,具有在外加磁场作用下快速可逆地改变流变性能的特点.选择剪切阀式作为阻尼器的工作模式,对磁流变阻尼器的磁路进行设计,优化了磁流变阻尼器的结构参数,并根据理论分析选择阻尼器的结构尺寸,设计制作了单出杆磁流变阻尼器. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(11):1355-1371
This paper deals with a novel approach to the control system synthesis of semi-active and active seat suspensions. An original control strategy is discussed in order to increase the effectiveness of vibration isolators used for protection of working machines operators. As an example of the proposed control system design, the suspension systems with a magneto-rheological damper and a pneumatic spring are investigated using a laboratory experimental set-up with seated humans. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(7):891-908
The active lateral suspension (ALS) of a train consists of either active or semi-active technologies. However, such an active system on a real railway vehicle is not easy to test because of cost and time. In this study, a hardware-in-the-loop simulation (HILS) system is developed to test the ALS. To this end, the dynamic model of a railway vehicle is equipped with the actuator, two bogies and four-wheel sets, and the ALS is used. The proposed HILS system consists of an alternating current servo motor connected to a ball-screw mechanism and a digital control system. The digital control system implements the dynamic model and the control algorithm. The design and manufacture of the HILS system are explained in detail. Both the passive damper and the magneto-rheological (MR) fluid damper are tested using the HILS system, where the sky-hook control algorithm was applied for the MR fluid damper. Experimental results show that the proposed HILS system can be effectively used for the performance estimation of the ALS. 相似文献
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一种用于车辆半主动悬架控制的磁流变阻尼器模型 总被引:3,自引:0,他引:3
文中对适用于车辆半主动悬架控制器设计的磁流变阻尼器模型进行研究.首先分析阻尼力与位移、速度以及输入电流之间的关系,并结合现有阻尼器模型的优点,提出一种精确的便于控制的双曲正切磁滞模型.接着,将磁流变阻尼器安装在硬件在环仿真平台上进行试验,利用试验得到的阻尼器动态特性数据,进行阻尼器模型的参数辨识和曲线拟合.最后,将基于拟合参数的模型仿真结果与试验数据进行比较,验证了模型的正确性. 相似文献
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Design of a Predictive Semiactive Suspension System 总被引:1,自引:0,他引:1
Alessanro Giua Mauro Melas Carla Seatzu Giampaolo Usai 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2004,41(4):277-300
In this paper we present an original design procedure for semiactive suspension systems. Firstly, we consider a target active control law that takes the form of a feedback control law. Secondly, we approximate the target law by controlling the damper coefficient f of the semiactive suspension. In particular, we examine two different kinds of shock absorbers: the first one uses magneto-rheological fluid instead of oil, while the second one is a solenoid valve damper. In both cases the nonlinear characteristics force-velocity of the damper are used to approximate the target law. To improve the efficiency of the proposed system, we take into account the updating frequency of the coefficient f and compute the expected value of f using a predictive procedure. We also address the problem of designing an asymptotic state observer that can be used not only to estimate the current state but also to predict the value that the state will take at the next sampling time. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4):277-300
In this paper we present an original design procedure for semiactive suspension systems. Firstly, we consider a target active control law that takes the form of a feedback control law. Secondly, we approximate the target law by controlling the damper coefficient f of the semiactive suspension. In particular, we examine two different kinds of shock absorbers: the first one uses magneto-rheological fluid instead of oil, while the second one is a solenoid valve damper. In both cases the nonlinear characteristics force-velocity of the damper are used to approximate the target law. To improve the efficiency of the proposed system, we take into account the updating frequency of the coefficient f and compute the expected value of f using a predictive procedure. We also address the problem of designing an asymptotic state observer that can be used not only to estimate the current state but also to predict the value that the state will take at the next sampling time. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(7):1025-1041
In this paper, a magneto-rheological (MR) damper-based semi-active controller for vehicle suspension is developed. This system consists of a linear quadratic Gauss (LQG) controller as the system controller and an adaptive neuro-fuzzy inference system (ANFIS) inverse model as the damper controller. First, a modified Bouc–Wen model is proposed to characterise the forward dynamic characteristics of the MR damper based on the experimental data. Then, an inverse MR damper model is built using ANFIS technique to determine the input current so as to gain the desired damping force. Finally, a quarter-car suspension model together with the MR damper is set up, and a semi-active controller composed of the LQG controller and the ANFIS inverse model is designed. Simulation results demonstrate that the desired force can be accurately tracked using the ANFIS technique and the semi-active controller can achieve competitive performance as that of active suspension. 相似文献
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M. A. Eltantawie 《International Journal of Automotive Technology》2012,13(3):423-431
In this paper, a decentralized neuro-fuzzy controller has been created in order to improve the ride comfort and increase the
stability for half car suspension system, which used the magneto-rheological damper as a semi-active device. Firstly, relative
gain array and relative disturbance gain methods have been used for deriving a relation between inputs, disturbances and outputs
to select pairing with minimum interaction to design a decentralize controller. Secondary, decentralized neuro-fuzzy controllers
for front and rear chassis are designed to predict the required damping force taking the acceleration of the sprung mass and
desired acceleration obtained by using pole-placement method as inputs. To predict the control voltage required for producing
the force predicted by the controller, the inverse neuro-fuzzy model of MR damper has been designed. Simulation by using MATLAB
programs has been created. The results show that the ride comforts and vehicle stability have been improved in comparison
with the passive system. 相似文献