The Inertance Effect of the Lifting Rotors Rotation Speed Change on the Quality of Automatic Control of a “Heavy” Quadcopter

2020 ◽  
Author(s):  
M. K. Filyashkin
Keyword(s):  
Automatic Control ◽  
Rotation Speed ◽  
Speed Change

scholarly journals Research on Algorithm to Improve Accuracy of Temperature Measurement of Moving Strong Reflector

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Shaoliang Wei ◽  
Yuanjia Yang ◽  
Fengyu Cheng
Keyword(s):  
Surface Temperature ◽  
Temperature Measurement ◽  
Rotation Speed ◽  
Field Investigation ◽  
Improve Measurement ◽  
Aluminum Processing ◽  
Speed Change ◽  
Infrared Temperature Measurement ◽  
And Control

The roll is necessary and important equipment in aluminum processing, and its surface temperature will change its thermal expansion. The gap shape between rolls will change accordingly, affecting the quality of aluminum products. Therefore, it is important to monitor and control the roll surface temperature. The roller is a highly reflective body that rotates continuously during work. This article proposes an infrared temperature sensor to measure its surface temperature. Through field investigation and a literature review, we know that a roller’s motion will affect the accuracy of its surface temperature measurement. An infrared temperature measurement compensation algorithm based on rotation speed is constructed to eliminate this influence. Experimental results show that this method can make up for the temperature measurement error caused by the change of rotation speed and hence improve measurement accuracy. The algorithm is simple and adaptable and provides a new method to improve the accuracy of temperature measurement given speed change.

Effect of Rotation Speed on the Quality of Friction Welded AA 6061/AA 7075 Joints

2014 ◽  
Vol 56 (5) ◽  
pp. 381-385
Author(s):  
Ayhan Orhan ◽  
Yücel Asma
Keyword(s):  
Rotation Speed ◽  
Aa 7075

Experience with the Relay Procedure for Tuning Controllers in Automatic Control of Chlorination

1993 ◽  
Vol 28 (11-12) ◽  
pp. 257-261
Author(s):  
M. Truett Garrett ◽  
Zaki Ahmad ◽  
Shelly Young
Keyword(s):  
Wastewater Treatment ◽  
Automatic Control ◽  
Time Constant ◽  
Wastewater Treatment Plants ◽  
Relay Feedback ◽  
Quality Of Control ◽  
Incomplete Mixing ◽  
Long Time ◽  
Chlorine Demand

The recent requirements by U.S.E.P.A. for dechlorination and biomonitoring have increased the importance of automatic control of effluent chlorination in wastewater treatment plants. Difficulties with the Ziegler-Nichols controller tuning procedure were reported at the Kyoto Workshop, 1990. Problems are caused by the noise of incomplete mixing, a long time constant, and the disturbances of changing flow and chlorine demand. The Astrom-Hagglund relay feedback procedure provides acceptable control while data is logged to determine the controller constants. Experiences in using the procedure in existing facilities (not redesigning the mixing point) and the quality of control are presented.

Project Review on Water Level Sensing Using PLC

2016 ◽  
Vol 2 (2) ◽  
Author(s):  
Osama Mahfooz ◽  
Mujtaba Memon ◽  
Asim Iftikhar
Keyword(s):  
Automatic Control ◽  
Water Level ◽  
Digital Computer ◽  
Human Error ◽  
Water Tank ◽  
Industrial Plants ◽  
Commercial Use ◽  
The Cost ◽  
Water Tanks

<span>A PLC is a digital computer used to automate electromechanical processes. This research is<span> based on automation of a water tank by using Siemens PLC. Automatic control of water tanks<span> can work continuously and can provide accurate quantity of water in less time. In such process<span> there is no need of labor so there is no human error. Without human error, the quality of product<span> is better and the cost of production would definitely decrease with no error in quantity required.<span> Water level sensing can be implemented in industrial plants, commercial use and even at home<br /><br class="Apple-interchange-newline" /></span></span></span></span></span></span>

scholarly journals Results of Laboratory Studies of the Automated Sorting System for Root and Onion Crops

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1257
Author(s):  
Alexey Dorokhov ◽  
Alexander Aksenov ◽  
Alexey Sibirev ◽  
Nikolay Sazonov ◽  
Maxim Mosyakov ◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Technological Parameters ◽  
Post Harvest ◽  
Manual Sorting ◽  
Sorting System ◽  
Working Bodies ◽  
Automatic Removal

The roller and sieve machines most commonly used in Russia for the post-harvest processing of root and tuber crops and onions have a number of disadvantages, the main one being a decrease in the quality of sorting due to the contamination of working bodies, which increases the quantity of losses during sorting and storage. To obtain high-quality competitive production, it is necessary to combine a number of technological operations during the sorting process, such as dividing the material into classes and fractions by quality and size, as well as identifying and removing damaged products. In order to improve the quality of sorting of root tubers and onions by size, it is necessary to ensure the development of an automatic control system for operating and technological parameters, the use of which will eliminate manual sorting on bulkhead tables in post-harvest processing. To fulfill these conditions, the developed automatic control system must have the ability to identify the material on the sorting surface, taking into account external damage and ensuring the automatic removal of impurities. In this study, the highest sorting accuracy of tubers (of more than 91%) was achieved with a forward speed of 1.2 m/s for the conveyor of the sorting table, with damage to 2.2% of the tubers, which meets the agrotechnical requirements for post-harvest processing. This feature distinguishes the developed device from similar ones.

Fuzzy Control System of Titanium Dioxide Hydrolysis Process

2011 ◽  
Vol 128-129 ◽  
pp. 882-885
Author(s):  
Rong Fu Zhou ◽  
Ding Xin Shuai ◽  
Yu Tang ◽  
Xue Tong Zhang
Keyword(s):  
Titanium Dioxide ◽  
Automatic Control ◽  
Fuzzy Theory ◽  
Hydrolysis Product ◽  
Heating System ◽  
Normal Operation ◽  
Operation Process ◽  
Hydrolysis Process ◽  
Hydrolysis Temperature

Hydrolysis process is the key part of sulfuric acid method’s production technology of titanium dioxide, it is also the most rigorous part of the process control, and precipitate out the white hydration precipitation TiO2 from the mother liquor, and separate from other soluble metal sundry ions, further purify the TiO2. The quality of hydrolysis product not only affects the normal operation of the follow-up, but also affects the quality of the final product directly. This article do some study and design to the hydrolysis automatic control, use computer，DCS and PLC control the hydrolysis operation process, temperature control, steam heating system, That means comprised monitoring station by the DCS，CRT, mouse and keyboard replace the simulates panel and operator, and use the fuzzy theory control the hydrolysis temperature rise process, improve the accuracy and precision of the operating, at the same time, reduce the labor intensity of the workers, realize the automatic control of the hydrolysis process, stabilize and improve the product quality effectively

scholarly journals Research on the parameters of producing filamentous textured soybean protein with soybean protein isolated and soybean protein concentrate

2018 ◽  
Vol 238 ◽  
pp. 04006
Author(s):  
Aiping Fei ◽  
Xiaoliang Hao ◽  
Junyu Jiang ◽  
Yong Wang ◽  
Yingxue Teng ◽  
...  
Keyword(s):  
Feed Rate ◽  
Protein Production ◽  
Rotation Speed ◽  
Raw Materials ◽  
Soybean Protein ◽  
Protein Concentrate ◽  
Screw Speed ◽  
Soybean Protein Concentrate

Textured soybean protein (TSP) is a product made from cooking and extrusion of soybean protein, which has been widely used in food, feed and other industries. This text made soybean protein isolated (SPI) and soybean protein concentrate (SPC) as the raw materials to produce filamentous protein production. By experiment, the influence of puffing temperature, screw speed and feed rate on the quality of the protein products was studied. Finally it was concluded that when the temperature of the barrel was 152 °C, the screw rotation speed was 119 rpm, the feed rate was 0.426 kg/min, the TSP product had the biggest expansion degree.

Study on Stability Exponent Apparatus

2012 ◽  
Vol 531-532 ◽  
pp. 551-554
Author(s):  
Ge Hua Chen
Keyword(s):  
Water Quality ◽  
Automatic Control ◽  
Stability Index ◽  
Circulating Water ◽  
The Stability ◽  
Measured Water ◽  
Water Piping

The stability index apparatus is presented, which adopts electrochemical principle and microcontroller technology to determine the solution alkalinity of the circulating water processed by CaCO3. Base on it, this apparatus calculates the stability exponent to evaluate whether the measured water is stable, or existing the tendency of fouling or corrosion. The scaling and the corrosion of pipes and equipments are relieved by controlling the quality of the circulating water. This paper presents the new stability exponent apparatus with which the stability of the water quality can be determined accurately and provides the basis for controlling the water quality. The automatic control of water quality is realized by this apparatus with the cooperation of the dosing system, ensuring the circulating water piping to be safe and stable.

Paper 5: Application of Diesel Engines in the Royal Navy

1969 ◽  
Vol 184 (16) ◽  
pp. 32-43
Author(s):  
W. H. Sampson
Keyword(s):  
Automatic Control ◽  
Diesel Engines ◽  
Royal Navy ◽  
Lubricating Oils ◽  
Marine Propulsion ◽  
Improve Reliability ◽  
Selection Of

This paper deals with the application and selection of diesel engines for marine propulsion and auxiliary purposes with particular reference to the special requirements for naval applications. Details are given of the various means that have been developed for dealing with airborne and structure-borne noise, for reducing the effects of external shock, and for checking the quality of lubricating oils during service. Automatic control and protection equipments, including fluidic, are described and the paper finally deals with the means adopted to improve reliability and to reduce maintenance.

Microstructure and Mechanical Properties of FSWed Aluminum Extrusion with Bobbin Tools

2012 ◽  
Vol 706-709 ◽  
pp. 990-995 ◽  
Author(s):  
K. Okamoto ◽  
A. Sato ◽  
Seung Hwan C. Park ◽  
Satoshi Hirano
Keyword(s):  
Mechanical Properties ◽  
Feed Rate ◽  
Rotation Speed ◽  
Tool Design ◽  
Aluminum Extrusion ◽  
Tool Rotation Speed ◽  
Process Robustness ◽  
Tool Rotation ◽  
Process Productivity

Bobbin FSW technique is assessed in terms of process productivity and robustness considering the metallurgical and mechanical qualities of the joint. Several different designed bobbin tools were applied to aluminium A6xxx alloy extrusions, at feed rate of 400-1000mm/min with tool rotation speed of 600-1000rpm. In case of A6068-T6, a joint efficiency of 68% was achieved at 600mm/min, which is almost equivalent to the productivity and quality of the conventional FSWed joints, hence the potential of bobbin FSW technique was suggested. The bobbin tool design was further optimized considering the practical process robustness to the part fit issue, and defect free welds have been achieved for the joints with a set gap up to 1mm. However, the oxide remnant, so called “lazy S” was observed in a joint made with an inadequate designed tool, which significantly deteriorates the mechanical properties.

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