搜索结果: 1-15 共查到“工学 tractor”相关记录27条 . 查询时间(0.315 秒)
MULTITEMPORAL HYPERSPECTRAL DATA ANALYSIS FOR REGIONAL DETECTION OF PLANT STRESS BY USING AN AIRBORNE-AND TRACTOR-BASED SPECTROMETER–CASE STUDY: SUGAR BEET DISEASE RHIZOCTONIA SOLANI
Sugar Beet Hyperspectral Remote Sensing GIS Vegetation Indices OSAVI Multitemporal Classification
2015/8/10
Every year sugar beet diseases cause lower sugar beet yields and qualities compared to the average. For that reason, high resolution field and airborne hyperspectral data is used to recognize a fungal...
Geometric performance parameters of three-point hitch linkage system of a 2WD Indian tractor
kinematic linkage analysis Newton-Raphson solution virtual hitch point
2015/5/18
Geometric performance parameters of three-point hitch system of a most sold model of a 2-wheel drive Indian tractor were determined by generating the path of upper and lower hitch points by kinematic ...
the operation of agricultural tractor with universal ecological oil
synthetic oil hydraulic pump fl ow characteristic
2014/2/24
h is contribution presents the results of the research into the characteristics of ecological oil labelled MOL Farm UTTO
Synt in the tractor operating conditions. Biodegradable fl uid was appl...
基于自适应模糊控制的拖拉机自动导航系统（Autonomous Navigation System for Agricultural Tractor Based on Self-adapted Fuzzy Control）
拖拉机 模糊控制 遗传算法
2010/12/29
阐述了一种基于自适应模糊控制的拖拉机自动导航系统。由PLC、电控开关液压阀和比例方向液压阀组成自动转向控制系统，设计了PD转向控制算法；为提高拖拉机自动导航的精度和稳定性，提出了一种基于遗传算法的自适应模糊控制方法，采用遗传算法在线优化模糊控制规则以及输出比例因子，既保留了传统模糊控制的优点，又有效改善了系统的控制品质；仿真和田间试验结果表明，该方法可以迅速消除跟踪误差，响应速度快，超调小，系统工...
The durability test of tractor hydrostatic pump type UD 25 under operating load
hydrostatic pump operation load test simulation flow characteristics ecological fluid
2014/2/26
The results of the UD 25 hydrostatic pump durability test are presented; they were obtained in the laboratory under operating load. The test of operating load was a continuation of the hydrostatic pum...
基于农田不平度的拖拉机机组输入谱推导与振动仿真（Deduction of Input Spectrum of Tractor-implement Combination and Vibration Simulation Base on Farm Surface Roughness）
农田不平度 拖拉机作业机组 输入谱
2009/12/28
推导了拖拉机为两轴四轮、播种机为单轴两轮的六轮输入谱矩阵，可用于研究牵引式播种作业机组受农田不平度激励所产生振动的频域特性。用Roberson-Wittenburg(R-W)方法建立了牵引机组的22自由度动力学模型，然后根据R-W法建立了机组的动力学普遍方程，在对方程进行运动学和动力学分析的基础上，采用多步Geal-预估-校正法进行了时域求解，采用等效的统计线性化方法进行频域求解，对比分析表明动力...
Measuring the limits of uphill timber skidding with a WOODY 110 forestry tractor
forestry tractor skidding maximum slope maximum load
2009/11/27
The paper deals with the test results of uphill skidding of wood with a WOODY 110 cable skidder. The aim of the study was to find the limits of uphill skidding in relation to load size, log orientatio...
Wheelslip in skidding with the AGT 835 T adapted farm tractor
skidding farm tractor wheelslip measurement
2009/11/27
The paper presents a wheelslip measurement method for small farm tractors (AGT 835 T) adapted for skidding, with mechanical and hydrostatic mechanical transmissions. The research focused on uphill ski...
东方红拖拉机自动转向控制系统设计（Development of Automatic Steering Control System Based on Dongfanghong Tractor）
自动导航拖拉机 自动转向控制 电控比例液压阀
2009/11/3
以东方红-X804型拖拉机为平台，改造原拖拉机的油路，使用电控比例液压阀，并设计电控单元，组成了自动转向控制系统。简述了油路的改造与电控比例液压阀安装，电控单元的设计，包括单片机（C8051F040）、角度传感器（KMA199）以及CAN总线网络，实现了SD卡存储系统，实时存储试验过程中的数据。试验结果表明：信号跟踪的最大误差1.1°、平均误差0.5°、平均延时为0.2 s。自动转向控制系统具有良...
机载式农田三维地形测量系统设计与试验（Tractor-mounted Field 3-D Topography Surveying System）
激光平地 地形测量 全球定位系统
2009/11/3
设计了一种机载式农田三维地形测量系统。该系统主要由激光测量接收器、GPS接收机、控制器和液压系统等组成，除了可以进行地形测量外，系统还可以实现激光平地作业。其测量原理是利用测量接收器获取测量点的高程信息，利用GPS接收机获取测量点的平面位置信息，将两者在控制器中进行数据融合，从而得到测量点的三维地形信息。在田间试验条件下，对机载式农田三维地形测量系统进行了不同行进速度下的试验研究，并与采用定点测量...
基于ISO 11783的拖拉机导航控制系统设计与试验（Automatic Navigation Control System for Tractor Based on ISO 11783）
拖拉机 自动导航 控制系统 设计 试验
2010/5/5
基于ISO 11783标准构建了拖拉机自动导航控制系统，系统包括5个电子控制单元（ECU），其中转向ECU节点可以根据从总线上接收到的转向指令来控制前轮转向。对自动导航控制系统的网络服务性能进行了分析，并进行了使用该系统的拖拉机直线路径跟踪试验。试验表明，基于ISO 11783的拖拉机自动导航控制系统能满足实时性要求，并能较好地实现路线跟踪，直线跟踪最大横向偏差为11cm。 According t...
拖拉机最终传动多目标模糊可靠性优化设计（Multi-objective Fuzzy Reliability Optimization Design of Tractor’s Final Transmission）
拖拉机 最终传动 模糊可靠性 多目标优化 遗传算法
2010/5/5
综合考虑拖拉机单级外啮合直齿圆柱齿轮最终传动的承载能力、结构、齿面磨损和传动效率等问题，应用模糊数学和可靠性理论以及多目标优化技术对该机构进行设计。建立了以机构的体积和两齿轮的最大滑动系数最小、效率最高为目标函数，以模数、小齿轮齿数、齿宽和啮合角为设计变量的多目标模糊可靠性优化设计数学模型，应用多目标优化的模糊解法和遗传算法对其进行求解。在保证最大滑动系数不超限的前提下，模糊可靠性优化设计方案比常...
The slippage of the driving wheels of a tractor in a cultivated soil and stubble
tractor trailer driving wheel slippage grip weight utilization coefficient ratio of mass traction force
2010/11/1
The article analyses the relation between the slippage of driving wheels and the traction characteristics of a tractor. The indicators for estimating wheel slippage are a coefficient of tractor weight...
The effect of tractor supply in Iran agriculture from a macro plan point of view
Iran tractor supply mechanisation
2014/2/26
The aim of this study was to investigate the effect of the tractor supply on agricultural yield from a macro plan perspective. The required information was obtained from the Institute of Agricultural ...
Impact of semitrailer tyre pressure upon passive resistance and tractor unit operation economy
lost powerspeedrollingtyre pressurefuel consumption
2014/2/26
The aim of the measurement was to establish and prove the effect of the semitrailer tyre pressure on the magnitude of power losses and energy intensity in a tractor unit operation. The measured and ca...