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首页> 外文会议>14th International ISTVS conference >The Front Suspension of Agricultural Tractors
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The Front Suspension of Agricultural Tractors

机译：农用拖拉机的前悬架

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Apparently, in the last few years the manufacturers of agricultural tractors feel anrnincreasing interest in the development of suspension systems of the front axle, ranging from thernpassive schemes to the active schemes through the intermediate semi-active schemes. Thernexpected advantages are a combination of comfort and handling targets, mostly related with thernhigh speed travel on roads and partly related with the low speed travel (and work) onrnunprepared surfaces.rnGenerally, the suspension schemes are implemented by hydraulic circuits, I.e. more or lessrncomplex networks of valves and accumulators coupled with one or more actuators acting on thernfront axle through a proper mechanical linkage. The semi-active and active schemes alsorninclude an electronic circuit to perform a control strategy, to be evaluated on the basis of somernfigures of merit tested or computed in the operational environment of the machine.rnThis paper offers an introduction to the above problems by means of a simulation model of therntractor (a simplified multi-body description) and the suspension circuit (a reference architecturernuseful for both passive and semi-active schemes). The system performance is studied inrnpresence of discrete and continuous perturbations active on the front and rear wheels, and thernrelevant figures of merit are used to estimate the improvement offered by the passivernsuspension and investigate some aspects of the conversion to a semi-active one.
机译：显然，在最近几年中，农用拖拉机的制造商对前轴悬架系统的开发越来越感兴趣，该系统从被动方案到主动方案到中间半主动方案不等。预期的优点是舒适性和操控性目标的结合，主要与道路上的高速行驶有关，部分与未准备好的路面上的低速行驶（和工作）有关。通常，悬架方案是通过液压回路实现的，即阀和蓄能器的或多或少复杂的网络，以及通过适当的机械联动装置作用在前轴上的一个或多个执行器。半主动和主动方案还包括执行控制策略的电子电路，该电路将根据在机器操作环境中测试或计算的一些优劣指标进行评估。本文通过以下方法介绍了上述问题：牵引器（简化的多体描述）和悬挂电路（对无源和半有源方案都有用的参考架构）的仿真模型。研究了在前轮和后轮上不存在离散和连续扰动的情况下的系统性能，并利用相关的品质因数来评估被动悬架所提供的改进，并研究了转换为半主动悬架的某些方面。

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