scholarly journals Control scheme of thermal insulating door based on area linkage control structure

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Yujie Yan ◽  
Bo LV ◽  
Chao Yan ◽  
Jiaoling Jiang ◽  
Ke Xin ◽  
...  
Keyword(s):  
Working Conditions ◽  
Control Structure ◽  
Pi Controller ◽  
Close System ◽  
Thermal Insulating ◽  
Control Scheme ◽  
Single Block ◽  
Simulation Results ◽  
And Control ◽  
Block Groups

Taking the thermal insulating door as an example in which door blocks are driven by electric push rod, the area linkage control structure of block-groups has been established based on door blocks area linkage division. And multi-block control under different working conditions is realized. By employing PI controller to regulate single block to open and close, system controllability has been improved and control energy consumption has been reduced. The  simulation results show that the proposed control scheme can relieve the heavy dependence of thermal insulating door control on manual operation to some extent.

Model development and control of an auto-refrigerated polystyrene polymerization reactor

2021 ◽  
pp. 014233122110251
Author(s):  
Reyhane Mokhtarname ◽  
Ali Akbar Safavi ◽  
Leonhard Urbas ◽  
Fabienne Salimi ◽  
Mohammad M Zerafat ◽  
...  
Keyword(s):  
Temperature Control ◽  
Model Development ◽  
Heat Removal ◽  
Superior Performance ◽  
Polymerization Process ◽  
Vacuum System ◽  
Control Scheme ◽  
Simulation Results ◽  
And Control ◽  
Operating Plant

Dynamic model development and control of an existing operating industrial continuous bulk free radical styrene polymerization process are carried out to evaluate the performance of auto-refrigerated CSTRs (continuous stirred tank reactors). One of the most difficult tasks in polymerization processes is to control the high viscosity reactor contents and heat removal. In this study, temperature control of an auto-refrigerated CSTR is carried out using an alternative control scheme which makes use of a vacuum system connected to the condenser and has not been addressed in the literature (i.e. to the best of our knowledge). The developed model is then verified using some experimental data of the real operating plant. To show the heat removal potential of this control scheme, a common control strategy used in some previous studies is also simulated. Simulation results show a faster dynamics and superior performance of the first control scheme which is already implemented in our operating plant. Besides, a nonlinear model predictive control (NMPC) is developed for the polymerization process under study to provide a better temperature control while satisfying the input/output and the heat exchanger capacity constraints on the heat removal. Then, a comparison has been also made with the conventional proportional-integral (PI) controller utilizing some common tuning rules. Some robustness and stability analyses of the control schemes investigated are also provided through some simulations. Simulation results clearly show the superiority of the NMPC strategy from all aspects.

scholarly journals Control and estimation of anaerobic digestion processes using hydrogen and volatile fatty acids measurements

2018 ◽  
Vol 78 (10) ◽  
pp. 2027-2035 ◽  
Author(s):  
M. Sbarciog ◽  
G. Giovannini ◽  
R. Chamy ◽  
A. Vande Wouwer
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Hydrogen Concentration ◽  
Volatile Fatty Acids ◽  
Control Structure ◽  
Tight Control ◽  
Detailed Model ◽  
Control Scheme ◽  
Estimation And Control ◽  
And Control

Abstract The anaerobic digestion (AD) technology is widely used in the treatment of waste and wastewater. To ensure the treatment efficiency and to increase the production of biogas, which can be reused as a renewable energy source, a good understanding of the process and tight control are needed. This paper presents an estimation and control scheme, which can be successfully used in the operation of the AD process. The process is simulated by the ADM1 model, the most complex and detailed model developed so far to characterize AD. The controller and the observer, which provides estimates of the unmeasurable variables needed in the computation of the control law, are designed based on a simplified model developed in a previous work. Since it has been shown that hydrogen concentration is an accurate and fast indicator of process stability, it was chosen as controlled variable. Aside from the hydrogen concentration, the only measurement employed by the proposed control structure is the volatile fatty acids concentration. Simulation results prove the effectiveness of the proposed control structure.

Power Quality Control of Wind-Diesel Hybrid Power Systems Using Fuzzy PI Controller

2012 ◽  
Vol 622-623 ◽  
pp. 1022-1026
Author(s):  
Su Hyung Yang ◽  
Ho Chan Kim ◽  
Chang Jin Boo ◽  
Min Jae Kang ◽  
Eel Hwan Kim ◽  
...  
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Fuzzy Controller ◽  
Controller Design ◽  
Pi Controller ◽  
Hybrid Power Systems ◽  
Hybrid Power ◽  
Control Scheme ◽  
Fuzzy Pi Controller ◽  
Simulation Results

This paper proposes a modeling and controller design approach for a wind-diesel hybrid system including dump load. The proposed control scheme for power quality is fuzzy PI controller which has advantages of PI and fuzzy controller. Simulation results show that the proposed controller is more effective against disturbances caused by wind speed and load variation than the PI controller, and thus it contributes to a better quality wind-diesel hybrid power system.

The Application Of Computer Algebra In Modelling And Vibration Control Of A Flexible Manipulator

2012 ◽  
Author(s):  
Z. Mohamed ◽  
A. A. Mohd Faudzi ◽  
M. N. Ahmad ◽  
Z. M Zain ◽  
A. W. I. Mohd Hashim
Keyword(s):  
Finite Element ◽  
Transfer Function ◽  
Vibration Control ◽  
Computer Algebra ◽  
Flexible Manipulator ◽  
Input Shaping ◽  
Control Scheme ◽  
Simulation Results ◽  
And Control ◽  
Symbolic Algorithm

Kertas kerja ini membentangkan aplikasi algebra computer utk pemodelan dan kawalan getaran sistem manipulator boleh ubah (flexible manipulator). Sebuah model berasaskan simbol menspesifikasikan sifat manipulator telah dibina menggunakan bahasa simbolik berasaskan finite element dan Lagrange. Menggunakan pendekatan ini, transfer function diperoleh dalam bentuk simbolik. Analisis dilaksanakan untuk mengkaji signifikan dan relasi pemboleh ubah fizikal manipulator boleh ubah tersebut dengan sistem tertentu termasuk poles, zeros, kestabilan, frekuensi getaran dan tertentu fasa non minimum sistem tersebut. Hasil akhir simbolik tersebut kemudian digunakan untuk mereka cipta input shaping getaran skema kawalan. Hasil akhir simulasi dari respons manipulator dibentangkan untuk mendemontrasi aplikasi algorithm dalam pemodelan dan kawalan sesebuah manipulator boleh ubah. Kata kunci: Algebra computer, manipulator boleh ubah, pemodelan, kawalan getaran This paper presents the application of computer algebra to modelling and vibration control of a flexible manipulator system. A symbolic–based model characterising the behaviour of the manipulator is developed using a symbolic language based on finite element and Lagrange methods. In this approach, the system transfer function is obtained in symbolic form. Analyses are carried out to investigate the significance and relations of the physical parameters of the flexible manipulator with the system characteristics including poles, zeros, stability, vibration frequencies and non-minimum phase characteristics of the system. The symbolic results are then used to design an effective input shaping vibration control scheme. Simulation results of the response of the manipulator are presented to demonstrate the application of the symbolic algorithm in modelling and control of a flexible manipulator. The symbolic results are then used to design an effective input shaping vibration control scheme. Simulation results of the response of the manipulator are presented to demonstrate the application of the symbolic algorithm in modelling and control of a flexible manipulator. Key words: Computer algebra; flexible manipulator; modelling; vibration control

Complementary data fusion in vision-guide and control of robotic tracking

Robotica ◽  
2001 ◽  
Vol 19 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Y.M. Chen ◽  
C.S. Hsueh
Keyword(s):  
Neural Networks ◽  
Data Fusion ◽  
Moving Target ◽  
Robot Arm ◽  
End Effector ◽  
Robotic Tracking ◽  
Control Scheme ◽  
Simulation Results ◽  
And Control ◽  
Tracking Module

We present a data fusion control scheme for the hand-held camera of the SCORBOT-ER VII robot arm for learning visual tracking and interception. The control scheme consists of two modules: The first one generates candidate actions to drive the end-effector as accurate as possible directly above a moving target, so that the second module can handily take over to intercept it. The desired camera-joint coordinate mappings are generalized by Elman neural networks for a tracking module. The intercept module then determines a suitable intercept trajectory for the robot within the required conditions. The simulation results support the claim that it could be successfully applied to track and intercept a moving target.

On Aero Control Law Joined Compensatory PID for Glide down to Fixed Low Altitude System and Simulation Researches

2012 ◽  
Vol 198-199 ◽  
pp. 1021-1024
Author(s):  
De Hai Yu ◽  
Dong Cai Qu ◽  
Jian Hua Lu ◽  
Bin Wen Lu
Keyword(s):  
Control Law ◽  
Simple Analysis ◽  
Control Laws ◽  
Control Scheme ◽  
Improve Accuracy ◽  
Working Principle ◽  
Simulation Results ◽  
Low Altitude ◽  
Constant Altitude ◽  
And Control

In order to improve accuracy of constant altitude fly at low altitude and fly track of glide down to fixed altitude, aeroplane’s control scheme of glide down to fixed low altitude with PID compensatory link were designed. At the same time, the corresponding control laws had been designed. After simple analysis about working principle of the aeroplane’s control system, simulation researches were done to optimize designed control laws, so that achieving expectant requirement. Simulation results show that designed control scheme and control law were accurate and effective.

scholarly journals A New Seamless Transfer Control Strategy of the Microgrid

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Zhaoyun Zhang ◽  
Wei Chen ◽  
Zhe Zhang
Keyword(s):  
Control Strategy ◽  
Mode Conversion ◽  
Control Device ◽  
Control Logic ◽  
Mode Control ◽  
Control Scheme ◽  
Simulation Results ◽  
Seamless Transfer ◽  
And Control

A microgrid may operate under two typical modes; the seamless transfer control of the microgrid is very important. The mode conversion controller is installed in microgrid and the control logic of master power is optimized for microgrid mode conversion. In the proposed scheme, master power is very important. The master-power is under the PQ control when microgrid is under grid-connected. And it is under V/F control when the microgrid is under islanding. The microgrid mode controller is used to solve the planned conversion. Three types of conversion are simulated in this paper. The simulation results show the correctness and validity of the mode control scheme. Finally, the implementation and application of the operation and control device are described.

scholarly journals REDUCTION OF LABOR COSTS ON THE FINISHING OPERATION OF STRIPPING CASTINGS

2020 ◽  
pp. 83-86
Author(s):  
E. Y. Karnova ◽  
N. I. Gabelchenko ◽  
O. P. Bondareva ◽  
P. O. Golishnikov ◽  
A. Y. Kulyaba
Keyword(s):  
Working Conditions ◽  
Labor Intensity ◽  
Labor Costs ◽  
Control Scheme ◽  
And Control

In this paper, in order to reduce the labor intensity of the Stripping operation of shaped castings and improve sanitary and hygienic working conditions, the design and control scheme of a stationary Stripping machine for processing large-sized castings from any type of alloy has been developed.

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