scholarly journals Influence of Input and Control Parameters on the Process of Pelleting Powdered Biomass

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4104
Author(s):  
Iuliana Gageanu ◽  
Dan Cujbescu ◽  
Catalin Persu ◽  
Paula Tudor ◽  
Petru Cardei ◽  
...  
Keyword(s):  
Initial Density ◽  
Raw Material ◽  
Control Parameters ◽  
Compression Pressure ◽  
Compression Process ◽  
Influence Of Process Parameters ◽  
Single Pellet ◽  
And Control ◽  
Moisture Increase

This paper presents theoretical and experimental research studying the influence of process parameters on the quality of biomass pellets. A validated mathematical model was developed, expressing the density of biomass pellets as determined by moisture content, compression pressure, process heat, the initial density of the material, pelleting speed and initial volume of the material. The experiments for determining the influence of these parameters on the compression of biomass into pellets and optimizing the process were conducted on a heated single pellet compression device, using fir sawdust as raw material. To describe and study the process, four input and control parameters were varied—raw material moisture, pelleting speed, maximum force applied and pelleting die temperature. From the experiments, it was noticed that overall, moisture and pressure have the most important effect on the compression process and pelleting speed, and heat applied also affected the process. Pellet density decreased when pelleting speed and material moisture increase and the density increased with a higher compression pressure and higher heat during the process.

Research on Network Control Based on QoS of the Network

2014 ◽  
Vol 989-994 ◽  
pp. 4265-4268
Author(s):  
Yang Zhou
Keyword(s):  
Quality Of Service ◽  
Networked Control Systems ◽  
Network Control ◽  
Control Parameters ◽  
Network Parameters ◽  
Model Combining ◽  
Technology Improvement ◽  
Network Quality ◽  
And Control

With the technology improvement of computer communication and multimedia coding, real time communication such as audio and video is introduced to networks and become a dominant way of communication.In the control of network, the optimization problem of the network controller based on network Quality of service (QoS) is a very important problem in the research of network control. Considering the influence of network quality—of service (QoS) on the control performance,a system model combining the network parameters and the control parameters is established for networked control systems (NCSs). Based on this, the condition dependent on the network parameters and control parameters is presented for the existence of guaranteed cost controllers.LMI).Within the scope of QoS perturbation,the designed controller can not only make the system as hypnotically stable but also guarantee that the system performance index is not greater than the upper bound.

Surface topography of machined fibre reinforced plastics obtained by stylus instruments and optical profilometers

1998 ◽  
Vol 212 (6) ◽  
pp. 479-488
Author(s):  
E Eriksen ◽  
H N Hansen
Keyword(s):  
Manufacturing Industry ◽  
Control Parameters ◽  
Reinforced Plastics ◽  
Optical Instruments ◽  
The Matrix ◽  
Working Principle ◽  
Reinforced Thermoplastics ◽  
And Control ◽  
Short Glass

In the manufacturing industry it is important to be able to specify and control the surface quality of the components produced. This is often done with stylus profilometers, by which standardized roughness parameters are found. In recent years instruments based on laser autofocusing have been introduced. They use another working principle to obtain the same parameters, but the settings of most of the measuring variables are not standardized. The present study has investigated aspects that have to be taken into account when the roughness of short fibre reinforced thermoplastics is measured by stylus instruments and by optical profilometers. The measurements were performed on machined surfaces with three distinct different roughness levels. The materials were two thermoplastics, polyoxymethylene and polypropylene, reinforced with short glass fibres. The two stylus instruments gave almost identical values, whereas significantly higher roughnesses were measured with one of the two optical instruments. The optical instruments were identical but with different settings of the control parameters, which resulted in large deviations between the values measured. Some of the differences between the two types of instrument are supposed to relate to the different properties of the fibres and the matrix, whereas others seem to relate to the instruments.

scholarly journals A GC-FID Validated Method for the Quality Control of Eucalyptus globulus Raw Material and its Pharmaceutical Products, and GC-MS Fingerprinting of 12 Eucalyptus Species

2014 ◽  
Vol 9 (12) ◽  
pp. 1934578X1400901
Author(s):  
Paula Carolina Pires Bueno ◽  
Milton Groppo Junior ◽  
Jairo Kenupp Bastos
Keyword(s):  
Quality Control ◽  
Essential Oil ◽  
Analytical Method ◽  
Eucalyptus Globulus ◽  
Pharmaceutical Products ◽  
Raw Material ◽  
Eucalyptus Species ◽  
Internal Standardization ◽  
And Control

In this work we have validated a method to standardize and control the quality of Eucalyptus globulus raw material and phytomedicines containing either the essential oil or the fluid extract of this plant in the final formulation. Internal standardization provided a simple, fast, and reproducible GC-FID analytical method that accurately quantified 1,8-cineol in different E. globulus sub-products, such as its essential oil, dried leaves, fluid extract, and syrup. In addition, GC-MS identification of the main compounds of E. globulus species afforded fingerprints for the qualitative analysis of different Eucalyptus species.

scholarly journals Process control testing for fused filament fabrication

2017 ◽  
Vol 23 (2) ◽  
pp. 246-256 ◽  
Author(s):  
Stephen Oluwashola Akande ◽  
Kenny Dalgarno ◽  
Javier Munguia
Keyword(s):  
Mechanical Properties ◽  
Impact Test ◽  
Structural Integrity ◽  
Fused Filament Fabrication ◽  
Influence Of Process Parameters ◽  
Content Type ◽  
Machine Performance ◽  
And Control ◽  
The Impact

Purpose The purpose of this research is to determine what tests can be most useful in quality assurance and control when using fused filament fabrication (FFF) 3D printing machines. The quality of the bond between layers is critical for the structural integrity of the fused filament fabricated parts. Design/methodology/approach Therefore, to determine the influence of process parameters on the quality of parts’ tensile, flexural, notched and un-notched impact, test specimens were fabricated in polylactic acid (PLA) using FFF with different layer thicknesses, fill densities, orientation and print speeds. The mechanical properties were then assessed along with the accuracy and mass of the samples. Findings It is concluded that a notched impact test gives a measure of interlayer bond strength which can be used across build styles to track machine performance, and that this, together with the mass and dimensions of the impact-test specimens, offers an appropriate set of tests capable of tracking the mechanical properties of parts produced using the FFF technique. Originality/value Therefore, this research finding will be of value in benchmarking FFF machines for quality parts fabrications.

scholarly journals Analisis Pengendalian Kualitas Super Absorbent Polymer Dengan Menggunakan Metode Six Sigma

2017 ◽  
Vol 1 (1) ◽  
pp. 19
Author(s):  
Rosihin Rosihin ◽  
Laksamana Mujaddid Ulinnuha ◽  
Dadi Cahyadi
Keyword(s):  
Six Sigma ◽  
Raw Material ◽  
Super Absorbent Polymer ◽  
Sigma Level ◽  
Damage Rate ◽  
Dark Colour ◽  
Absorbent Polymer ◽  
And Control ◽  
Main Factor

Quality control is an effort to increase customer satisfaction and minimize damage. Super Absorbent Polymer which is a product as a raw material for making baby diapers / elderly and sanitary napkins. In Super Absorbent Polymer, defects usually found in the colour contamination that there is a dark colour on the product, print labels mistakes and packaging defects. This study aims to determine the value of DPMO and sigma level, identify the efforts which is taken to reduce disability, identify the types of disability, and find the main factors causing disability. Six Sigma method is used to analyze data with define, measure, analyze, improve and control. The quantitative data obtained by direct observation of quality problems. By using the method of six sigma can be seen that the quality of the resulting product is quite good that is 3.07 sigma with a damage rate of 58,624 for a million production (DPMO). The three highest defect product causes are color contamination of 93.34%, misprint of 3.55%, and packaging damage as much as 3.11%. The main factor causing defects is the engine factor for the type of colour contamination defect,. The type of improper defects in the packaging labels and main factor for the packaging defects is the human factor.kecacatan rusaknya kemasan faktor utama ialah faktor manusia.

Time Delay Modeling and Sample Time Selection for Networked Control Systems

2001 ◽  
Author(s):  
Feng-Li Lian ◽  
James Moyne ◽  
Dawn Tilbury
Keyword(s):  
Time Delay ◽  
Control Systems ◽  
Networked Control Systems ◽  
Network Control ◽  
Performance Characteristics ◽  
Networked Control ◽  
Control Parameters ◽  
And Control ◽  
The Impact

Abstract This paper discusses the impact of network architecture on control performance in a class of distributed control systems called Networked Control Systems (NCS), and provides design considerations related to control quality of performance (QoP) as well as network quality of service (QoS). The integrated network-control system changes the characteristics of time delays between application devices. This study first identifies several key components of the time delay through an analysis of network protocols and control dynamics. The analysis of network and control parameters is used to determine an acceptable working range of sampling periods in an NCS. A network-control simulator and an experimental networked machine tool have been developed to help validate and demonstrate the performance analysis results, and identify the special performance characteristics in an NCS. These performance characteristics are useful guidelines for choosing the network and control parameters when designing an NCS.

scholarly journals Automated system for monitoring and control of the liquid wax production process

2021 ◽  
Vol 23 (2) ◽  
pp. 782
Author(s):  
Martín Díaz-Choque ◽  
Carlos Dávila-Ignacio ◽  
Augusto Sanchez-Ayte ◽  
Guillermo Morales-Romero ◽  
Almintor Torres-Quiroz ◽  
...  
Keyword(s):  
Production Process ◽  
Automatic Monitoring ◽  
Raw Material ◽  
Automated System ◽  
Monitoring And Control ◽  
Chemical Factors ◽  
Productivity Indicators ◽  
And Control ◽  
Wax Production

This article describes the design of an automated system for the automatic monitoring and control of the liquid wax production process, in order to quantify its effect on productivity indicators. For which initially the procedure for obtaining the automation will be described; then the results obtained will be presented, the same ones that will be identified through a comparative analysis. During the investigation it was determined that, through the use of a programmable logic controller, it was possible to improve the precision of the dosage of components in the liquid wax production process; By achieving acorrect dosage, it is achieved that the physical-chemical factors that intervene in the quality of the final product, which are the pH and specific density, are within the limits established by the company, this is reflected in the decrease 38.77% of the amount of monthly loss of raw material, thus achieving the optimization of the productivity of the production of liquid wax by 83.69% per month, compared to the non-automated process.<br /><div> </div>

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

Probability model for control parameters in the aircraft's information and control systems

2018 ◽  
Vol 2 ◽  
pp. 9-16
Author(s):  
A. Al-Ammouri ◽  
◽  
H.A. Al-Ammori ◽  
A.E. Klochan ◽  
A.M. Al-Akhmad ◽  
...  
Keyword(s):  
Control Systems ◽  
Probability Model ◽  
Control Parameters ◽  
And Control

Experimental Study of the Impact of Alisma plantago-aquatica Secretions on Pathogenic Bacteria

2014 ◽  
Vol 1 (3) ◽  
pp. 3-7
Author(s):  
O. Zhukorskyy ◽  
O. Hulay
Keyword(s):  
Pathogenic Bacteria ◽  
Initial Density ◽  
Biologically Active ◽  
Erysipelothrix Rhusiopathiae ◽  
Natural Focus ◽  
Test Species ◽  
Popula Tions ◽  
And Control ◽  
The Impact

Aim. To estimate the impact of in vivo secretions of water plantain (Alisma plantago-aquatica) on the popula- tions of pathogenic bacteria Erysipelothrix rhusiopathiae. Methods. The plants were isolated from their natural conditions, the roots were washed from the substrate residues and cultivated in laboratory conditions for 10 days to heal the damage. Then the water was changed; seven days later the selected samples were sterilized using fi lters with 0.2 μm pore diameter. The dilution of water plantain root diffusates in the experimental samples was 1:10–1:10,000. The initial density of E. rhusiopathiae bacteria populations was the same for both experimental and control samples. The estimation of the results was conducted 48 hours later. Results. When the dilution of root diffusates was 1:10, the density of erysipelothrixes in the experimental samples was 11.26 times higher than that of the control, on average, the dilution of 1:100 − 6.16 times higher, 1:1000 – 3.22 times higher, 1:10,000 – 1.81 times higher, respectively. Conclusions. The plants of A. plantago-aquatica species are capable of affecting the populations of E. rhusiopathiae pathogenic bacteria via the secretion of biologically active substances into the environment. The consequences of this interaction are positive for the abovementioned bacteria, which is demon- strated by the increase in the density of their populations in the experiment compared to the control. The intensity of the stimulating effect on the populations of E. rhusiopathiae in the root diffusates of A. plantago-aquatica is re- ciprocally dependent on the degree of their dilution. The investigated impact of water plantain on erysipelothrixes should be related to the topical type of biocenotic connections, the formation of which between the test species in the ecosystems might promote maintaining the potential of natural focus of rabies. Keywords: Alisma plantago-aquatica, in vivo secretions, Erysipelothrix rhusiopathiae, population density, topical type of connections.

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