履带式车辆

Half-track air-cushion vehicle is a new kind of hybrid vehicle. It can solve the transportation problem on soft ground effectively.

半履带式气垫车辆是一种新型混合式车辆，它可以有效地解决松软路面的运输问题。

The dynamic characteristics of the half-tracked air-cushion vehicle are different from other conventional vehicles. Its mechanical equation includes several parameters being related to propulsion system, air-cushion system and soil condition. This system is a higher order nonlinear time-variant system with a delay.

由于半履带式气垫车的力学特性不同于以往的常规车辆，其动力学模型包含与驱动系统、垫升系统、地面条件等有关的多个参数，属于大滞后的高阶非线性时变系统。

Based on mechanism and vehicle theories theoretical analysis is pursued and normal driving conditions are put forward. The relations are analyzed between load distribution and power consumption. Mechanical formula is proposed. Furthermore in this paper the theoretical model of the total power consumption is established, and the relations of the total minimized power consumption with the air-cushion pressure and the fan revolution are discussed. The optimum operation point is put forward. The dynamic digital simulation studies are carried out on the operating procedure of the half-track air-cushion vehicle on soft terrain. Mechanical parameters and soil mechanics characteristics affecting vehicle power consumption and riding performance are analyzed. At the same time according to the model formula, the automation control problem is discussed. It is a theoretical instruction for further automation control.

本文还从力学和车辆原理的角度进行了理论分析，推导了半履带式气垫车的需求功率及正常行驶条件，研究了气垫压力和功率消耗之间的关系，提出了力学模型公式；建立了半履带式气垫车总功率消耗的理论模型，研究了最小功率消耗时功率与垫压及表征气垫车行驶状态的各参数的关系，分析了相应的影响因素，并提出了最佳工作状态的定义；同时进行了半履带式气垫车在软地面的行驶过程的动态数字仿真试验研究工作，对影响车辆功率消耗和行驶平顺性的各力学参数和土壤参数进行了分析，得到了各运行状态参数的变化规律，验证了最佳工作状态和最佳垫压的理论，根据力学模型公式对进一步的自动控制问题进行了探讨，为系统的控制提供了理论指导。

The walking mechanism of push-pull air-cushion vehicle includes two parts: push-pull mechanism and anchoring mechanism, both take hydraulic cylinders as driving components. So this walking mechanism has advantages of lighter weight and higher driving efficiency, it can work on many areas.

推拉式气垫车的行走机构包括推拉机构和抓地锚定机构两部分，它们都是以液压油缸作为驱动元件，通过液压传动实现伸缩动作的，这样既省却了轮式、履带式车辆笨重、复杂的行走机构，又大大提高了气垫车的驱动效率，能够适应各种复杂地表条件。

In chapter two, the powertrain system of crawler construction vehicle and the parts' characteristics are analyzed.

第二章系统地分析和研究了履带式工程车辆的动力传动系统各组成部分的特性。

If effect of track grousers is not considered,pull of a single track shoe can be calculated byfollowing equation〓The pull due to the effect of track grousers is

在不考虑履剌效应的情况下，单块履带板的推力为：〓履带板或履带式车辆的推进力大概介于考虑和不考虑履刺效应的两个理论值之间。

According to the moving characteristics of tracklayer, when the vehicle is on ramp and the ground's vertical pressure is linear, the calculating formulas of relationship between the deviation of the instantaneous steering center, the position of vehicle's gravity, steering radius, moving velocity, moving acceleration, and vehicle's orientation, were obtained by the theory and method of vector analysis in mathematics and mechanics.

摘要根据履带式车辆的运动特点，运用数力学中矢量分析理论和方法，推导了接地比压为线性分布时履带式车辆在斜坡上转向时，瞬时转向中心偏移量与车辆重心位置、转向半径、行进速度、加速度、车辆方位相互关系的计算公式。

The dynamic model of power transmission and automatic clutch system is developed.

研究具有机械式自动变速器的履带式车辆起步时离合器结合控制问题。

As off-road usage dominates the vehicle's profile, tracked configurations provide significantly better mission travel times.

对越野能力的要求基本上可以决定车辆的外形轮廓，当在越野的时候履带式车辆的耗时明显短得多。

In the absence of the French Air Force (most of which was elsewhere in Belgium), traffic jams were the Germans' major concern – Panzer Group Kleist comprised 39,373 wheeled vehicles, 1222 tanks and 545 other tracked and semi-tracked vehicles.

在没有法国空军(他们大部分都在比利时的其他地方)的情况下，德军主要关注的是交通拥塞——克莱斯特装甲群由39，373辆轮式车辆，1222辆坦克和545辆其他履带式和半履带车辆组成。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了