نتایج جستجو برای: tractor mounted ppenetrometer

تعداد نتایج: 23534  

2008
Jack C. Wiley Reed J. Turner

Power hop is a “porpoising” type of pitch/bounce oscillation superimposed on the forward motion of tractors equipped with pneumatic tires. It is most often observed with tractors having two powered axles pulling towed implements in moderate to high draft field operations on dry soils. As power hop begins, the tractor exhibits gradually increasing vibration amplitudes until the operator, of nece...

Journal: :Journal of occupational health 2004
Mohammad Muzammil Saad S Siddiqui Faisal Hasan

The vibration conditions to which tractor operators are subjected are complex and varied with multi axis translation and rotational vibration inputs to different parts of the body. Working under such conditions may lead to human fatigue and other driving related hazards. The present research was carried out to study the operators under varying conditions of vibration while driving a tractor wit...

Journal: :Physical review letters 2012
Andrey Novitsky Cheng-Wei Qiu Andrei Lavrinenko

A Bessel beam without an axial gradient can exert a pulling force on an object [A. Novitsky, C. W. Qiu, and H. Wang, Phys. Rev. Lett. 107, 203601 (2011)]. However, it cannot be called a "tractor beam" per se, as long as the light pulling effect is ultrasensitive to the object's material and size, a perturbation of which will make the optical traction go away. In this Letter, we investigate and ...

Journal: :مهندسی بیوسیستم ایران 0
رسول لقمانپور زرینی پردیس کشاورزی و منابع طبیعی دانشگاه تهران اسداله اکرم عضو هیئت علمی دانشگاه تهران-پردیس کشاورزی و منابع طبیعی-دانشیار رضا علیمردانی عضو هیئت علمی دانشگاه تهران-پردیس کشاورزی و منابع طبیعی-استاد سید رضا طباطبایی کلور عضو هیئت علمی دانشگاه علوم کشاورزی و منابع طبیعی ساری-دانشیار

the aims of this study were about determining of amount of accuracy in tractor-moldboard plow system for tillage operation on paddies and also survey on efficacy of decision support software application on amount of energy use. for this purpose, decision support software was developed by visual basic 6.0. for survey in amount of efficacy of applying the decision support system on paddies tillag...

2011
Van T. Huynh Ryan N. Smith Ngai Ming Kwok Jayantha Katupitiya

Autonomous guidance of agricultural vehicles is vital as mechanized farming production becomes more prevalent. It is crucial that tractor-trailers are guided with accuracy in both lateral and longitudinal directions, whilst being affected by large disturbance forces, or slips, owing to uncertain and undulating terrain. Successful research has been concentrated on trajectory control which can pr...

2014
Yi Jinggang

The paper aims at the complex situation of the tractor field operation and adopts the gear shift rule of two parameters to control the six gear shift of the tractor. Using the artificial neural network chip the model number of which is ZISC036 and the computer on slice the model number of which is PIC17C42 establishes the controller of the radial basis function artificial neural network-RBFANN....

2008

There are competing economic goals when plowing a farm field. The rows must be level, to reduce erosion. The rows should also perfectly abut each other, so that no land is wasted on gaps and no fuel is wasted on overlapping areas. With todays GPS-guided tractors, it has become worthwhile to try to produce an optimal tractor path, knowing that a tractor can actually be programmed to follow it. T...

Azadi, Jafari, Samadian,

The directional response and roll stability characteristics of a partly filled tractor semi-trailer vehicle, with cylindrical tank, are investigated in various maneuvers. The dynamic interaction of liquid cargo with the tractor semi-trailer vehicle is also evaluated by integrating a dynamic slosh model of the partly filled tank with five-degrees-of-freedom of a tractor semi-trailer tank mode...

Journal: :Agronomy 2022

The profitability of fresh citrus crops outlines the possibility using mechanical systems to reduce high cost manual harvesting operation. In this line, an experimental light shaker with low frequency and amplitude a hydraulic arm was developed. This device had been successfully used for ornamental trees. previous studies, it proven that removal percentage adequate, but slightly damaged fruit i...

Adel Rezvanivande Fanayi, Ali Abbaszadeh Farid Bejaie

Farming organic vegetable and crops have grown as a market desiring commodity. Weed control in farms has been costly and laborous and it has always been hard to achieve a proper weeding. A few chemicals are commonly applied in organic farming. Thermal weeding with flame burners seems a good solution; however, it has its own drawbacks, such as; damaging the main crops, low performance, being inf...

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