agriculture is a complex system science and the knowledge of it is consisting of much concepts and relationships. examinations in connection with site-specific farming have been carried out by our institute since 1998. precision farming is a way of agricultural production, which takes into account the in-field variability, a technology where the application-seeding, nutrient replacement, sprayi...

This paper presents a magnetostrictive in-pipe impact drive mechanism (IDM). To estimate the output performances of the IDM, a dynamics model was developed based on the magnetostrictive material constitutive model and mechanical model of the IDM. Therefore, an experimental system has been built to test the motion performance of IDM. Simulation and experimental results illustrate that the propos...

This contribution is dedicated to developing a thorough physical model of a high-precision planar positioning system. Subject of this investigation is Tetra’s state-of-the-art high-precision planar positioning system “PPS200” using air bearings and electromagnetic coupling as a principle of propulsion. We develop physical models of all components and investigate the influence of various physica...

INSTRUCTIONS The technology for ultra-precision machining has been developed rapidly and steadily. In recent years, the demand for free form, complex and microscopic cutting has increased as a result of the need for highvalue-added fabrication for items such as high NA glass lenses, micro-grooves, diffractive aspheric lenses and other optical components. The ultra-precision machine for cutting ...

for electric machine, servo drive, object positioning, intelligent control, two-mass load. Abstract— It is known that existing algorithms for control position of precision electric drive of systems with nonliarities: elasticity and friction do not provide damping of autooscillations at infralow tracking speed. Therefore control algorithms, which ensure smooth motion of the load at acceptable tr...

Piezoelectric actuators are the most suited actuation devices for high precision motion operations in the positioning tasks include miro/nano-positioning [1]. These actuators have unlimited motion resolution and posses some advantages such as ignorable friction, noiseless, zero backlash and easy maintenance, in comparison with the conventional actuated systems which are based on the sliding or ...

Long stroke and nanometer precision positioning technology based on dual stage has important applications in the fields of ultra precision machinery and equipment, which consists of a coarse stage for long stroke and a fine one for high precision. In order to further suppress the positioning noise of dual stage, we design an abdominal and passive damper for the fine stage. However, it becomes a...

Integer carrier phase ambiguity resolution is often a prerequisite for high precision GPS positioning. It applies to a great variety of GPS models, including those which are used in hydrographic applications and marine positioning. Since the quality of kinematic GPS positioning depends critically on whether the correct integer ambiguities are used or not, it is of importance to have easy-to-com...

The influence of the coal mine geographical environment on the electromagnetic transmission might result in the difficulty of wireless positioning under the mine. Concerning that the influence of the underground working face on the wireless signal attenuation is mainly reflected on the path attenuated electricity and based on the underground geographical differences, two corresponding electroma...

Vehicular Cooperative Positioning (CP) is a recently emerged concept to estimate or improve position information of vehicles in Vehicular Ad-Hoc Networks (VANETs). Using CP, positioning accuracy and availability is improved in the areas without (or with poor) availability of the Global Navigation Satellite System (GNSS) signals. CP is based on vehicular communication for which Dedicated Short R...