共查询到15条相似文献,搜索用时 109 毫秒
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发动机主动控制悬置是解决提高环保性能、降低燃耗要求与降低汽车振动噪声、满足发动机高水平振动控制的要求之间冲突的重要途径.本文主要就发动机主动控制的基本理论依据以及常用的主动控制悬置技术进行了论述,并指出发动机主动控制悬置是未来发动机悬置的主要研究方向. 相似文献
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发动机悬置又称作发动机支承,它的主要作用是将发动机柔性地支承在车身(或底盘)上,以减少发动机传给车身的振动和噪声。近年来,随着主动控制式发动机悬置的采用,可以说发动机悬置装置有了新的发展。 一、弹性元件式发动机悬置(图1) 相似文献
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为了降低发动机工作时引起的整车振动,提出了使用多通道滤波x-LMS (MFXLMS) 算法作为主动悬置系统的控制算法。以发动机转速信号作为参考信号,主动悬置安装位置下方的两路加速度信号作为误差信号。根据算法完成试验平台搭建。采用白噪声电压信号作为输入激励,通过 LMS算法离线辨识得到主动悬置到加速度传感器的多路次级通道,在dSPACE上完成实车控制试验。试验结果表明,MFXLMS算法的运用显著降低了发动机不同转速工况下引起的测点加速度响应,提高了整车的乘坐舒适性。 相似文献
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(三)主动式发动机悬置配备4.0L-V8-TFSI发动机的2012款奥迪A8轿车,除了汽缸关闭功能外,还开发了一个重要部件:主动式发动机悬置。该系统与四缸模式时的主动噪音控制(ANC)系统一样,也是用于提高行驶舒适性的,具体就是在一个较宽的频率范围内都能消除震动。以2012款奥迪A8车为例,其上就有一个普通的变速器悬置、两个可控式变速器悬置和这种新开发的主动式发动机悬置,如图49所示。1.总成悬置的作用 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):721-736
This work introduces a new concept in designing semi-active engine mounts. Engine mounts are under continuous development to provide better and more cost-effective engine vibration control. Passive engine mounts do not provide satisfactory solution. Available semi-active and active mounts provide better solutions but they are more complex and expensive. The variable stiffness engine mount (VSEM) is a semi-active engine mount with a simple ON–OFF control strategy. However, unlike available semi-active engine mounts that work based on damping change, the VSEM works based on the static stiffness change by using a new fast response force controlled variable spring. The VSEM is an improved version of the vibration mount introduced by the authors in their previous work. The results showed significant performance improvements over a passive rubber mount. The VSEM also provides better vibration control than a hydromount at idle speed. Low hysteresis and the ability to be modelled by a linear model in low-frequency are the advantages of the VSEM over the vibration isolator introduced earlier and available hydromounts. These specifications facilitate the use of VSEM in the automotive industry, however, further evaluation and developments are needed for this purpose. 相似文献
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针对传统内燃机冷却水温控制系统存在不能快速、准确、稳定地调节内燃机冷却水温的特点。本文用三通阀代替节温器来控制冷却液大小循环;并运用基于模糊PID控制算法的控制器对系统进行控制,最后在Matlab/simulinl(中进行仿真。仿真结果显示,该控制方法有效控制了冷却系统迟滞等不良现象。 相似文献
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Seung-Bok S. Choi Hyun-Jeong H. Song 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2002,37(3):193-216
This paper presents vibration control of a passenger vehicle using an electronically controllable electro-rheological (ER) engine mount. A mixed-mode ER engine mount operating under the flow and shear modes is devised and manufactured. After establishing the dynamic model of the proposed ER engine mount, both field-dependent displacement transmissibility and dynamic stiffness of the ER engine mount are empirically evaluated. The ER engine mount is then incorporated with a full-vehicle model in order to investigate vibration control performance at the driver's seat position. The governing equation of motion of the full-vehicle model is formulated by considering engine excitation force, followed by designing a skyhook controller to attenuate unwanted vibration. The controller is implemented through a hardware-in-the-loop simulation (HILS), and control responses such as acceleration level at idle speed are evaluated in the frequency and time domains. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(3):193-216
This paper presents vibration control of a passenger vehicle using an electronically controllable electro-rheological (ER) engine mount. A mixed-mode ER engine mount operating under the flow and shear modes is devised and manufactured. After establishing the dynamic model of the proposed ER engine mount, both field-dependent displacement transmissibility and dynamic stiffness of the ER engine mount are empirically evaluated. The ER engine mount is then incorporated with a full-vehicle model in order to investigate vibration control performance at the driver's seat position. The governing equation of motion of the full-vehicle model is formulated by considering engine excitation force, followed by designing a skyhook controller to attenuate unwanted vibration. The controller is implemented through a hardware-in-the-loop simulation (HILS), and control responses such as acceleration level at idle speed are evaluated in the frequency and time domains. 相似文献