Overvaluation of the Maximum Error in a Tracking Problem for a Lur'e Postnikov Type Process

2017 ◽  
pp. 261-269
Keyword(s):  
Maximum Error ◽  
Tracking Problem ◽  
Type Process

Microwave resonance method for measuring microliter volumes of free moisture in aviation fuels

2020 ◽  
pp. 49-56
Author(s):  
Vitaly V. Volkov ◽  
Michael A. Suslin ◽  
Jamil U. Dumbolov
Keyword(s):  
Solid Surface ◽  
Free Water ◽  
Resonance Method ◽  
Cavity Resonator ◽  
Maximum Error ◽  
Aviation Fuel ◽  
Fuel Quality ◽  
Microwave Resonance ◽  
Free Moisture ◽  
Microwave Losses

One of the conditions for ensuring the safety of air transport operation is the quality of aviation fuel refueled in aircraft. Fuel quality control is a multi-parameter task that includes monitoring the free moisture content. Regulatory documents establish the content of free water no more than 0.0015% by weight. It is developed a direct electrometric microwave resonance method for controlling free moisture in aviation fuels, which consists in changing the shape of the water drops by pressing them on a solid surface inside a cylindrical cavity resonator. This can dramatically increase dielectric losses. Analytical and experimental analysis of the proposed method is carried out. The control range from 0,5 to 30 μl of absolute volume of moisture in aviation fuels with a maximum error of not morethan 25 % is justified. The sensitivity of the proposed method for monitoring microwave losses in free moisture drops transformed into a thin layer by pressing is an order of magnitude greater than the sensitivity of the method for monitoring microwave losses in moisture drops on a solid surface in a resonator. The proposed method can be used as a basis for the development of devices for monitoring the free moisture of aviation fuels in the conditions of the airfield and laboratory. The direction of development of the method is shown.

LIQUIDUS THERMO-BAROMETER FOR THE MODELING OF MAGNETITE — MELT EQUILIBRIUM

2018 ◽  
pp. 71-80
Author(s):  
N. S. Aryaeva ◽  
E. V. Koptev-Dvornikov ◽  
D. A. Bychkov
Keyword(s):  
Experimental Data ◽  
Liquidus Temperature ◽  
Vertical Structure ◽  
Maximum Error ◽  
Silicate Melt ◽  
System Of Equations ◽  
Wide Range ◽  
Basaltic Melts ◽  
Multidimensional Statistics

A system of equations of thermobarometer for magnetite-silicate melt equilibrium was obtained by method of multidimensional statistics of 93 experimental data of a magnetite solubility in basaltic melts. Equations reproduce experimental data in a wide range of basalt compositions, temperatures and pressures with small errors. Verification of thermobarometers showed the maximum error in liquidus temperature reproducing does not exceed ±7 °C. The level of cumulative magnetite appearance in the vertical structure of Tsypringa, Kivakka, Burakovsky intrusions predicted with errors from ±10 to ±50 m.

Development of the mathematical model for assessing the optimal measurement step when surveying the depth of the underground pipeline from the ground

2020 ◽  
Vol 10 (4) ◽  
pp. 364-371
Author(s):  
Ruslan V. Aginey ◽  
◽  
Rustem R. Islamov ◽  
Alexey A. Firstov ◽  
Elmira A. Mamedova ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Survey Data ◽  
Ground Surface ◽  
Maximum Error ◽  
Large Error ◽  
Bending Stress ◽  
Buried Pipeline ◽  
Optimal Measurement ◽  
Pipeline Section ◽  
Bending Stresses

Existing methods for estimating the bending stresses of buried pipeline section based on the survey data for the depth of the axis of the pipeline from the ground surface are characterized by a large error between the real values of the bending stress and the values of the bending stress obtained from the calculation results based on the survey data. The purpose of this study is to improve the methodology for calculating the bending stresses of buried pipeline section based on the results of determining the depth of the axis of the pipeline from the ground surface, taking into account the design features of the pipeline and the used search equipment. Mathematical models are proposed that allow for the set value of the maximum error in determining bending stresses for a particular pipeline to choose the optimal measurement step before the survey, which will allow to reduce the error. Explanations are given on the choice of the maximum step of the study based on the strength characteristics of the pipeline. A calculation is provided that confirms the adequacy of the developed mathematical models and the possibility of their application in practice.

RITUAL DALAM TRADISI PERTANIAN (GALU) PADA MASYARAKAT DESA BONE TONDO KECAMATAN BONE KABUPATEN MUNA (1979-2017)

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
HARNITA HARNITA ◽  
H. Anwar ◽  
Pendais Hak
Keyword(s):  
Negative Impact ◽  
Forest Area ◽  
History Writing ◽  
Historical Method ◽  
Village Community ◽  
Type Process ◽  
New Forest ◽  
Ritual Process ◽  
The Village

ABSTRAK: Tujuan utama dalam penelitian ini mengetahui  latar belakang pelaksanaan kegiatan Ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna, mendeskripsikan ritual-ritual apa saja yang dilakukan dalam pelaksanaan kegiatan ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna, mendeskripsikan proses kegiatan ritual dalam Tradisi Pertanian pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna dan mendeskripsikan perubahan yang terjadi saat ini dalam proses Ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo Kecamatan Bone Kabupaten Muna. Metode yang digunakan dalam penelitian ini adalah metode sejarah menurut Helius Sjamsuddin yang terdiri atas: (1) Heuristik (pengmpulan sumber), (2) Kritik sumber (verifikasi), (3) Historiografi (penulisan sejarah).Hasil penelitian menunjukan bahwa: (1) Latar belakang pelaksanaan ritual dalam tradisi pertanian pada masyarakat Desa Bone Tondo adalah dalam bercocok tanam (degalu) masyarakat Desa Bone Tondo memiliki keyakinan bahwa hutan di Muna banyak dihuni oleh makhluk ghaib yang berpotensi mengganggu kehidupan masyarakat. Maka secara intensif masyarakat melakukan hubungan komunikasi dengan melalui upacara yang tradisional yang dimana harus dilakukan sebelum bercocok tanam. Dengan maksud mendapatkan keselamatan dalam kegiatan perladangan terhindar dari marabahaya serta hasil panen yang melimpah. Ritual dilakukan karena adanya pantangan dan larangan yang apabila jika tidak dipatuhi akan menimbulkan dampak negatif. (2) Ritual-Ritual yang dilakukan dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo ritual pembukaan lahan kawasan hutan baru yaitu desolo. Ritual kaago-ago yang dilakukan saat lahan sudah bersih dan siap untuk ditanamkan, ritual dilakukan untuk memindahkan makhluk ghaib, permohonan dan sebagai rasa syukur. Ritual kasambuno wite (deghoti wite) dan ritual kafematai, (3) Proses pelaksanaan Ritual dalam Tradisi Pertanian (Galu) pada Masyarakat Desa Bone Tondo yaitu semua proses ritual dilakukan pada hari baik yang dipimpin oleh dukun (parika), menyiapkan alat dan bahan (sesajian) yang dibutuhkan tiap-tiap upacara ritual yang akan dilaksanakan. (4) Perubahan yang terjadi saat ini dalam proses pelaksanaan Ritual dalam Tradisi Pertanian (Galu) pada masyarakat Desa Bone Tondo, dapat dilihat pada ritual kaago-ago, dimana saat ini sabagian ritual tersebut tidak lagi dijalankan. Perubahan-perubahan lain adalah terkait dengan konsistensi ritual yang sebagian masih ada yang melakukan secara utuh namun ada juga yang hanya menjalankan 2 atau 3 ritual saja. Kata Kunci: latarbelakang, jenis, proses dan perubahan, galu ABSTRACT: The main objective in this study is to find out the background of the implementation of Ritual activities in the Agricultural Tradition (Galu) of the Bone Tondo Village Community, Bone District of Muna District, describing the rituals performed in the implementation of ritual activities in the Agricultural Tradition (Galu) of the Village Community Bone Tondo, Bone District, Muna Regency, describes the process of ritual activities in the Agricultural Tradition of the Bone Tondo Village Community, Bone District Muna District and describes the changes that occur currently in the Ritual process in the Agricultural Tradition (Galu) of the Bone Tondo Village Community, Bone District, Muna Regency. The method used in this study is the historical method according to Helius Sjamsuddin which consists of: (1) Heuristics (collection of sources), (2) Criticism of sources (verification), (3) Historiography (history writing). The results of the study show that: (1 ) The background of ritual implementation in the agricultural tradition of the Bone Tondo Village community is in farming (degalu). Bone Tondo Village community has the belief that the forests in Muna are inhabited by unseen creatures that have the potential to disrupt people's lives. So the community intensively communicates through traditional ceremonies which must be carried out before planting. With the intention of obtaining safety in farming activities to avoid danger and abundant harvests. The ritual is carried out because of restrictions and prohibitions which if not obeyed will cause a negative impact. (2) Rituals carried out in the Agricultural Tradition (Galu) of the Bone Tondo Village Community in the ritual of opening a new forest area, namely desolo. Kaago-ago rituals are carried out when the land is clean and ready to be planted, rituals are performed to remove supernatural beings, requests and as gratitude. Kasambuno wite rituals (deghoti wite) and kafematai rituals, (3) The process of implementing Rituals in the Agricultural Tradition (Galu) of the Bone Tondo Village Community, namely all ritual processes carried out on a good day led by a shaman (parika), preparing tools and materials (offerings) ) required each ritual ceremony that will be carried out. (4) Changes that occur at this time in the process of carrying out the Ritual in the Agricultural Tradition (Galu) of the Bone Tondo Village community, can be seen in the kaago-ago ritual, where at present the ritual portion is no longer carried out. Other changes are related to the consistency of the ritual, some of which still do the whole, but there are also those who only carry out 2 or 3 rituals. Keywords: Background, type, process and change, galu

Neural Torque Controllers For Trajectory Tracking Problem Of A Nonholonomic Mobile Robot

2007 ◽  
Vol 5 (2) ◽  
pp. 121-136
Author(s):  
N. Martins ◽  
D. Bertol ◽  
W. Lombardi ◽  
E. R. Pieri ◽  
E. Castelan
Keyword(s):  
Mobile Robot ◽  
Trajectory Tracking ◽  
Tracking Problem ◽  
Nonholonomic Mobile Robot

scholarly journals Stability of the Tracking Problem with Task-Priority Inverse Kinematics

2018 ◽  
Vol 51 (22) ◽  
pp. 121-125 ◽  
Author(s):  
Mathias Hauan Arbo ◽  
Jan Tommy Gravdahl
Keyword(s):  
Inverse Kinematics ◽  
Tracking Problem ◽  
Task Priority

scholarly journals Design and experiment of multi-mode steering system of agricultural machinery for hilly and mountainous area

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110348
Author(s):  
Kai Hu ◽  
Wenyi Zhang
Keyword(s):  
Negative Impact ◽  
System Development ◽  
Coupling Model ◽  
Maximum Error ◽  
Rear Wheel ◽  
Steering System ◽  
Mountainous Area ◽  
Agricultural Machinery ◽  
Hydraulic Cylinders ◽  
Multi Mode

In order to improve the steering flexibility of agricultural machinery in hilly and mountainous areas, a multi-mode steering system with front wheel steering, rear wheel steering, and four-wheel steering has been developed. The hydraulic steering system based on load sensitivity principle and proportion-integration-differentiation (PID) controlling algorithm was designed, which overcomes the negative impact of external load changes on flow control accuracy. The mechanical-hydraulic-controlling coupling model established in the AMESim and the sequential quadratic combinatorial optimization algorithm (SQCOA) was adopted to obtain the optimal combination of PID parameters. The simulation results demonstrate that the parameters such as pressure, speed, displacement of hydraulic cylinders, etc. in different steering modes meet the design requirements. To examine and verify the system performance, the test platform was researched and developed for conducting steering radius and displacement measurement. The experimental data illustrated that the front and rear hydraulic cylinders have good synchronization accuracy in four-wheel steering mode, and the fast switch of steering mode can be realized. The maximum error rate of is steering radius 4.21% and 3.77%, respectively, in two-wheel steering and four-wheel steering modes. The research methods and conclusions can provide a theoretical basis and reference for the other steering system development.

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