نتایج جستجو برای: hydraulic systems

تعداد نتایج: 1208128  

2003
Song Liu Bin Yao

This paper presents an indirect adaptive robust control (IARC) of electro-hydraulic systems driven by singlerod hydraulic actuators. Unlike the tracking-performanceoriented direct adaptive robust control (DARC) algorithm, in addition to good output tracking performance, the IARC also focuses on accurate parameter estimates for secondary purposes such as machine health monitoring and prognostics...

2000
R. Burrows Q. Qiu

sures experienced by a pipeline can be either beneficial or detrimental from an operational performance perspective, depending on the amount, the two phase regime of the mixture (whether homogeneous or slug) and the nature and cause of the transient. It is generally held that when free (undissolved) air, or gas, is present in a hydraulic system, it can greatly reduce the surge pressure levels b...

Journal: :تحقیقات آب و خاک ایران 0
محبوبه سادات ملائی دانشجوی سابق کارشناسی ارشد علی مهدوی مزده استادیار گروه مهندسی آب دانشگاه بین المللی امام خمینی (ره) علیرضا وطن خواه استادیار گروه مهندسی آبیاری و آبادانی دانشگاه تهران

in this study, hydraulic properties of low pressure drip irrigation systems were studied under laboratory conditions and using of the pipes that exist in iran. therefore, effect of various heads from 0.45 to 1.8m was evaluated for lateral pipe with outside diameter 32mm and length of 16, 30, 60 and also the lateral pipe with length 16 and outside diameter of 16, 20, 25 and 32mm, on hydraulic ch...

Journal: :Proceedings of the National Aviation University 2002

Journal: :Transactions of the Society of Instrument and Control Engineers 1965

Journal: :Proceedings of the JFPS International Symposium on Fluid Power 1999

2011
James D. Van de Ven Jennifer A. McInnis

The energy density of conventional hydraulic accumulators is significantly lower than competing energy domains. In this paper, a novel solution to improve the energy density of hydraulic energy storage, the flywheel-accumulator, is presented. The flywheelaccumulator integrates rotating kinetic and pneumatic energy storage, where the hydraulic fluid is used to change the mass moment of inertia o...

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