Journal of Majlesi Journal of Mechatronic Systems
Volume:11 Issue: 4, Dec 2022
- تاریخ انتشار: 1401/10/17
- تعداد عناوین: 6
This paper proposes an experimental investigation of a four-story structure which is connected to a shaking table. The investigated shaking table is designed to produce any kinds of vibration amplitude. Also, the whale optimization algorithm (WOA) is used for identification of the experimental structure parameters such as mass, stiffness, and damping to show the adaptation of the results collected from the identified model on the results achieved from the linear model.Keywords: Experimental Measurement Structural control, WOA Identification, structural vibration control
Dispersed generation resources in a microgrid are equipped with power electronics technologies including high-frequency AC systems (e.g., microturbines) and DC (e.g., solar panels and fuel cells). By enhancing the frequency controller and implementing a novel method, this paper seeks to reduce the microgrid frequency deviation in the dynamic mode. The proposed controller is intended for use in a renewable-energy microgrid. According to the strategy, fuzzy logic is used to adjust the proposed control coefficients at any time, and the group search optimizer (GSO) algorithm is employed to optimize them. The controller parameters are optimized to account for the uncertainty of some microgrid component parameters to improve the robust controller's performance. The key idea behind this proposed control strategy is to combine the capabilities of fuzzy logic with the proposed method to reduce control operations and achieve optimal fuzzy control in the transient mode to ensure resilient microgrid frequency control performance. The Fuzzy-PI-GSO frequency controller outperforms the standard Fuzzy-PI and PI frequency controllers in simulations with various disturbances.Keywords: Microgrid, Controller, Fuzzy Logic, Frequency Control, Optimization
Digital currencies are one of the important and new phenomena in the field of financial technologies. These currencies have been welcomed by countries and financial markets due to their facilitating functions and in the field of payment. Electricity distribution companies, which play an essential role in the distribution of energy between subscribers, receive the cost of this distribution in the form of electricity bills from subscribers. Payments move towards digitalization more clearly. In this article, by designing new bills on the platform of the blockchain network, we achieve goals such as: eliminating paper bills, saving subscribers' time and costs, reducing the number of visits to the banking system, and facilitating the settlement of subscribers' accounts.Keywords: Digital Currencies, Blockchain Network, Electricity Distribution Companies, TrustWallet, Blockchain
Modeling, integration, and optimization of gas refinery amine circulation control system using neural networkPages 23-31
The Governor speed control system as one of the important components of the circulating amine pump speed control (MDEA) plays an essential role in the gas purification process and has been used in two electronic and pneumatic types in the Hashminejad Refinery. By controlling the flow of steam entering the turbine, the Governor keeps the speed of the turbine constant and finally controls the flow of amine entering the contact towers at the optimum point. With the completion of the Ramyar domestic model construction project instead of the American model with the Woodward brand, it was possible to optimize the turbine control system and make changes in it. The purpose of this research is to remove the local controller of the HIC turbine and change the minimum flow control system of the bypass path of the amine circulation pump output, as well as to simulate the speed using the neural network and control parameters. Therefore, in order to accurately model and study the control parameters using electronic registers, the turbine speed and drive were sampled, and by Honeywell software, the data change chart was entered into the Get Data software in the form of an image file. In the next step, these data were transferred to Excel and used to simulate the turbine speed using neural networks in MATLAB. Then the codes related to the control and simulation of the turbine speed were written in the Arduino software and through the OPC protocol it is possible to connect Arduino as a governor system simulator, Citect Scada software as monitoring and MATLAB as an analyzer and turbine speed simulator software. provided. Examining the output and simulation results show the optimal performance of the systems implemented in the steam turbine and the possibility of better communication between the user and the system and the significant reduction of human error. In the simulation, by comparing the actual performance of the turbine, it is possible to carefully check the control parameters in the special and critical conditions of the turbine performance, and check all the parameters of the turbine to compare with the real sample and make the desired changes in the simulator until the result Review.Keywords: Governor, MLP neural network, steam turbine, amine circulation pump
In this article, it deals with the modeling of the absorption process of acid gases in the contact tower by the amine fluid in the Khangiran Gas Refinery. The performed simulations show that the concentration of acid gases in the amine fluid increases with the reduction of the contact surface in the contact tower. The obtained model is in good agreement with operational data. In this research, the identification of sources of noise and fluctuations in the mentioned unit, adding the modeling of sensors and actuators and control systems to the simulation, especially PID control, has also been investigated.
By simulating and implementing PID control on the sour gas feed valve of the contact tower and making step changes in the input setting point, fluctuations were observed in all the variables of the absorption tower.
These fluctuations, along with other sensor uncertainties such as temperature sensors, flow transmitters, and pressure transmitters, indicate the presence of fluctuations throughout the tower. In order to eliminate these fluctuations, a controller based on fuzzy logic was used. The appropriate reduction in fluctuations and disturbances by this controller up to 80% shows the success of this controller in eliminating the chattering phenomenon in the gas purification unit.Keywords: PID controller, Governor, fuzzy, proportional controller
This research project focuses on the design and simulation of a multipurpose security system technology. The system consists of a microcontroller and several peripheral devices, including a Liquid Crystal Display (LCD), Buzzer, PIR sensor, vibration sensor (piezoelectric sensor), flame sensor, and gas sensor module, light dependent resistor (LDR), Time and Bluetooth Module. These devices work together to ensure the reliable operation of the security system. One advantage of this system over similar existing systems is that alerts and status updates are sent to the user through a Buzzer connected to the microcontroller. This feature allows the user to receive updates from any distance. Additionally, the system can be locked or unlocked using a manual keypad. To control the system and maintain all security functions, a program was designed using Compiler Code Vision AVR. The program was then applied in Proteus Software for simulation. The practical circuit results demonstrate that the system functions properly and provides reliable security at a reasonable cost. Overall, this research project highlights the importance of designing and simulating security systems to ensure their reliability and effectiveness. The use of a microcontroller and peripheral devices in this multipurpose security system (MSS) provides a versatile and efficient solution for securing various environments and demonstrate the efficiency of the proposed system.Keywords: Proteus software, Arduino mega, Multipurpose security system (MSS), Bluetooth, Light dependent resistor LDR, Time, Sensors