Power Control Modes and Performance Analysis of Excavator Hydraulic System

2013 ◽  
Vol 427-429 ◽  
pp. 759-762
Author(s):  
Hui Xian Han
Keyword(s):  
Control System ◽  
Power Control ◽  
Hydraulic System ◽  
Fast Response ◽  
Positive Control ◽  
Negative Control ◽  
Control Mode ◽  
Development Direction ◽  
And Performance ◽  
System Power

The article reviews the evolution of excavator hydraulic system power control mode, analyzes the structure and the advantage and disadvantage of main power control system such as throttle control system, negative control system and positive control system. The positive control system has the advantages of little power loss, fast response and high flow matching, which is the better control mode. Finally the paper prospects the development direction of excavator hydraulic system power control mode.

scholarly journals A Very Low CP Level Reduced Diarrhoea and Productivity in Weaner Pigs, but No Differences between Post-Weaning Diets Including Soybean Meal or Soy Protein Concentrate Were Found

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 678
Author(s):  
Julie C. Lynegaard ◽  
Niels J. Kjeldsen ◽  
Julie K. Bache ◽  
Nicolai R. Weber ◽  
Christian F. Hansen ◽  
...  
Keyword(s):  
Growth Performance ◽  
Soy Protein ◽  
Soybean Meal ◽  
Nutrient Utilization ◽  
Positive Control ◽  
Negative Control ◽  
Soy Protein Concentrate ◽  
Protein Concentrate ◽  
Feed Conversion ◽  
And Performance

Soy protein concentrate improves nutrient utilization and growth performance compared to soybean meal, and diets with a low crude protein (CP) level decreases diarrhoea. The objectives were to (1) test a low CP diet based on different soy products, and (2) to test a very-low CP diet (15.1%) with amino acids (AA) on diarrhoea and productivity. A total of 5,635 weaned pigs (~28 days), were assigned to five dietary treatments; PC (positive control): Standard CP levels (192, 189, 191 g/kg CP) with 2500 ppm ZnO; NC (negative control): Same as PC without ZnO; SP (Soy protein concentrate): Low CP levels (176, 174, 191 g/kg CP); SB (Soybean meal): Low CP levels (177, 176, 191 g/kg CP); and XLA (X-low CP + AA): Very low CP levels (154, 151, 191 g/kg CP) with AA. The PC and XLA diets reduced diarrhoea by 41 and 61%, respectively, compared to the NC group, while no difference between SB and SP were observed. The XLA diet reduced feed intake and daily gain compared with PC and NC, where SP, SB, and XLA had a poorer feed conversion compared with PC. Conclusively, the SP and SB low-protein diets did not reduce diarrhoea or growth performance, whereas the XLA diet decreased both diarrhoea and performance.

scholarly journals Penggunaan Kulit Nanas Fermentasi dalam Ransum yang Mengandung Gulma Berkhasiat Obat Terhadap Konsumsi Nutrient Ayam Broiler

2016 ◽  
Vol 16 (2) ◽  
pp. 76
Author(s):  
Wasir Ibrahim ◽  
Rita Mutia ◽  
Nurhayati Nurhayati ◽  
Nelwida Nelwida ◽  
Berliana Berliana
Keyword(s):  
Nutrient Intake ◽  
Broiler Chicken ◽  
Positive Control ◽  
Negative Control ◽  
Randomized Design ◽  
Pineapple Peel ◽  
Nutrient Consumption ◽  
Before And After ◽  
Completely Randomized Design ◽  
And Performance

ABSTRAK. Penelitian ini bertujuan untuk mengetahui penggunaan kulit nanas fermentasi ke dalam ransum yang mengandung gulma berkhasiat obat terhadap konsumsi nutrient ayam broiler. Penelitian ini menggunakan DOC jantan strain cob umur 2 hari sebanyak 200 ekor yang dipelihara selama 42 hari. Penelitian menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 5 ulangan. P0 = 0% tepung kulit nanas fermentasi (TKNF) dalam ransum mengandung 0% gulma obat(GO), (kontrol positif), P1 = 0% TKNF dalam ransum mengandung 2 % gulma obat (GO),(kontrol negatif), P2 = 7.5% TKNF dalam ransum mengandung 2 % gulma berkhasiat obat, P3 = 15% TKNF dalam ransum mengandung 2 % gulma berkhasiat obat, P4 = 22.5% TKNF dalam ransum mengandung 2 % gulma berkhasiat obat. Parameter yang diamati kandungan gizi kulit nanas sebelum dan sesudah fermentasi dan konsumsi nutrient. Pengaruh yang nyata terhadap parameter yang diamati dilanjutkan dengan Uji Jarak Berganda Duncan, Data yang diperoleh dari setiap parameter dianalisis ragam (ANOVA) menggunakan bantuan software SPSS 16.0. Dari hasil penelitian disimpulkan bahwa penggunaan kulit nanas yang fermentasi dengan yoghurt dalam ransum yang mengandung gulma berkhasiat obat pada taraf 15% memberikan hasil terbaik pada konsumsi nutrient ayam broiler. (Fermented pineapple peel supplementation with addition of medicinal weeds on nutrient intake consumption of broiler chicken) ABSTRACT. The aim of this study was to determine the effect of using fermented pineapple peel in the ration containing medicinal weeds on nutrient consumption and performance of broiler . Two hundred 2 days male broiler chicken cob strain were used in this study and kept for 42 days. Completely randomized design (CRD)was applied with 5 treatments and 5 replicates. Treatments consisted of P0 = 0% of fermented pineapple peels meal (FPPM) in ration containing 0% medicinal weed (MW), positive control). P1 = 0% of fermented pineapple peels meal (FPPM) in the ration containing 2 % medicinal weed (MW), negative control). P2 = 7.5% of FPPM in the ration containing 2 % medicinal weed (MW). P3 = 15% of FPPM in the ration containing 2 % medicinal weed (MW). P4 = 22,5% of FPPM in the ration containing 2 % medicinal weed (MW). The parameters measured was nutrien intake before and after fermented peel and consumption. The observed data were analyzed by statistical product and service solution (SPSS 16.0). Results showed that use of fermented pineapple peel meal up to 15% with addition medicinal weeds was the best on nutrient consumption of broiler chicken.

Analysis of Construction Machinery Hydraulic Control System

2013 ◽  
Vol 401-403 ◽  
pp. 1590-1595 ◽  
Author(s):  
Li Zhang
Keyword(s):  
Power Control ◽  
Hydraulic System ◽  
Control Mode ◽  
Hydraulic Control ◽  
Hydraulic Power ◽  
Construction Machinery ◽  
Advantages And Disadvantages ◽  
Power And Control ◽  
And Control ◽  
Hydraulic Control System

This article analyses the use requirement of construction machinery, introduce the main features of typical construction machinery hydraulic system, derived power control modes of hydraulic system form hydraulic power form, compares the advantages and disadvantages of each power control mode, gives the optimization solutions, at last, sum up the full text of the construction machinery hydraulic power and control modes and prospect of the hydraulic system to precision control.

scholarly journals Supplemental protease with phytase and xylanase and cereal grain source affected nutrient digestibility and performance of broilers

2021 ◽  
pp. 1-12
Author(s):  
K.W. McCafferty ◽  
A.F. Moss ◽  
N.K. Morgan ◽  
A.J. Cowieson ◽  
M. Choct
Keyword(s):  
Amino Acid ◽  
Control Diet ◽  
Positive Control ◽  
Negative Control ◽  
Nutrient Digestibility ◽  
Broiler Chicks ◽  
Cereal Grain ◽  
And Performance ◽  
Dietary Treatments ◽  
Amino Acid Concentrations

A study was conducted to evaluate the effects of supplemental protease and cereal grain type on nutrient digestibility (jejunum and ileum) and performance of broilers offered diets with reduced amino acid concentrations and supplemental xylanase and phytase. A total of 624 male broiler chicks (Ross 308) were randomly distributed into 48 floor pens (13 chicks/pen; 0.07 m2/bird) and offered one of six dietary treatments with eight replicates per treatment. Dietary treatments were either maize- or wheat-based with a positive control (PC) reference diet, a negative control diet without protease (NC; 60 g/kg lower amino acid density than PC), and an NC diet with protease. The reduction in amino acid density affected (P<0.05) nutrient digestibility by varying degrees depending on cereal grain source. At 14 d of age, cereal grain and protease showed a significant interaction (P<0.05) which affected jejunal and ileal starch digestibility, whereby protease increased digestibility in birds fed wheat-based diets but not in those fed maize-based diets. Cereal grain source affected (P<0.05) nitrogen (jejunum and ileum) and digestible energy (DE; ileum), where birds fed wheat-based diets had higher digestibility than those fed maize-based diets. At 28 d of age, birds fed wheat-based diets had a higher (P<0.01) jejunal and ileal nitrogen digestibility, whereas protease reduced ileal nitrogen digestion. Protease affected ileal starch digestion in birds fed wheat, but not maize-based diets, resulting in a significant cereal grain × protease interaction (P<0.05). Wheat-based diets had a higher DE than maize-based diets in both the jejunum and ileum. From 15 to 35 d of age, cereal grain source (P<0.05) affected performance, whereby broilers offered maize-based diets had better performance than those fed wheat-based diets.

Study on Simulation of Ocean Wave Generation System Based on SIMULINK

2013 ◽  
Vol 300-301 ◽  
pp. 133-139
Author(s):  
Shi Ming Wang ◽  
Jing He
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Axial Flow ◽  
External Input ◽  
Ocean Wave ◽  
Hydraulic Motor ◽  
Generation System ◽  
The Stability ◽  
Conversion Equation ◽  
System Power

Designed a generation system by using ocean wave power for seabed-base detector. The system is mainly composed of an energy conversion device, hydraulic system, power generation system and automatic control system. This paper showed the composition of each subsystem, including the structure of axial flow turbine and the conversion equation of PID control system, hydraulic motor system. The simulation model is established by using SIMULINK block of MATLAB software, gave the results in two different conditions, one have the stability external input and the other don’t meanwhile the hydraulic system will turn to accumulator circuit. The simulation results show that this system can provide stable power output as the real system design reference.

The Design of Rudder System Simulation Device

2014 ◽  
Vol 602-605 ◽  
pp. 1344-1347
Author(s):  
Zi Lin Zhang ◽  
Yang Liu ◽  
Dong Di Liu ◽  
Hong Bo Wang
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Closed Loop ◽  
System Simulation ◽  
Control Unit ◽  
Steering System ◽  
Control Mode ◽  
Electric Control ◽  
Ship Control ◽  
Operation Control

This paper designs a ship rudder system simulation device in order to serve the research of ship control better with the proportion of a real marine hydraulic rudder system, which can complete closed-loop experiments in the lab with the steering system. The rudder system simulation device mainly includes two parts, electric control system which uses PLC as core control unit, hydraulic system, and it can achieve both manual and automatic operation control mode.

Aktivitas Antifungi Air Perasan Bawang Merah (Allium ascalonicum L.) Terhadap Candida albicans Secara In Vitro

2017 ◽  
Vol 9 (2) ◽  
pp. 71
Author(s):  
Nurhasanah Nurhasanah ◽  
Fauzia Andrini ◽  
Yulis Hamidy
Keyword(s):  
Candida Albicans ◽  
Antifungal Activity ◽  
Allium Sativum ◽  
Fungicidal Activity ◽  
Positive Control ◽  
Negative Control ◽  
Randomized Design ◽  
Significant Difference ◽  
Completely Randomized Design

Shallot (Allium ascalonicum L.) has been known as traditional medicine. Shallot which has same genus with garlic(Allium sativum L.) contains allicin that is also found in garlic and has been suspected has fungicidal activity toCandida albicans. It is supported by several researches. Therefore, shallot is suspected has antifungal activity too.The aim of this research was to know antifungal activity of shallot’s water extortion againsts Candida albicans invitro. This was a laboratory experimental research which used completely randomized design, with diffusion method.Shallot’s water extortion was devided into three concentrations, there were 50%, 100% and 200%. Ketoconazole 2%was positive control and aquadest was negative control. The result of this research based on analysis of varians(Anova), there was significant difference between several treatments and was confirmed with Duncan New MultipleRange Test (DNMRT) p<0,05, there was significant difference between 100% shallot’s water extortion with othertreatments, but there was no significant difference between 50% shallot’s water extortion with 200% shallot’s. Theconclusion was shallot’s water extortion had antifungal activity againsts Candida albicans with the best concentration100%, but it was lower than ketoconazole 2%.

The Comparison of Ostecyte in the Pressure area and Tension area on Tooth Movement Because of Hyperbaric Oxygen Therapy

DENTA ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 34
Author(s):  
Arya Barahmanta ◽  
Muhammad Faizal Winaris ◽  
Pambudi Raharjo
Keyword(s):  
Hyperbaric Oxygen ◽  
Oxygen Therapy ◽  
Tooth Movement ◽  
Bone Remodelling ◽  
Orthodontic Tooth Movement ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Pressure Area

<p><strong><em>Background:</em></strong><em> Orthodontic tooth movement is a </em><em>interaction prosess</em><em> of resorption and deposition of bone remodeling. Orthodontic tooth movement by mechanical strength causes changes in alveolar bone. Osteocyte is an essential cell to respond bone remodelling. Hyperbaric Oxygen Therapy affects production of osteocyte because it can release Reactive Oxygen Species (ROS) and Nitrid Oxide (NO).  <strong>Purpose: </strong>To determine the difference number  of osteocyte in pressure and tension area during tooth movement by adjuvant of Hyperbaric Oxygen 2,4 ATA during 7 days starting on day 8 to day 14. <strong>Materials and Methods</strong>: This research used Completery Randomized Control Group Post Test Only Design. 36 cavia cobaya (male)  were divided into 3 groups randomly : the negative control groups, positive control group, and treatment group. Preparat staining used Hematoxylin Eosin (HE) and calculated on microscop 1000x with 20 field of view. Data analyses used one way ANOVA and LSD test then compared each area by using paired T test. <strong>Result:</strong> The data showed that the treatment group (P=10,67) tension area has the highest number of osteocyte than  negative control group (K-=3,67), positive control (K+=7,42). In the pressure area showed that negative control group (K-=5,00) has the highest  than positive control group (K+=3,83) and treatment (P=3,25). <strong>Conclusion: </strong>Therapy HBO 2,4 ATA 7 days starting on day 8 to day 14 is could increase osteocyte in the tissue to stimulate process of bone remodelling.</em></p><pre><strong> </strong></pre><p><strong><em>Keywords:</em></strong><em> Hyperbaric Oxygen, Tooth movement, Bone remodeling, </em><em>Osteocyte</em><em></em></p><p><em> </em></p><p><strong><em>Correspondence:</em></strong><em> </em><em>Arya Brahmanta</em><em>, Department of Orthodonty, Faculty of Dentistry, Hang Tuah University, Arif Rahman Hakim 150, Surabaya, Phone 031-5945864, Email:</em><em> </em><a href="mailto:[email protected]"><em>arya.brahmanta</em><em>@</em><em>hangtuah.ac.id</em></a></p>

Sign in / Sign up

Export Citation Format

Share Document