Majlesi Journal of Mechatronic Systems

Optimization of Energy Consumption of an Office Building in Tehran Region

Amin Fazeli Hervi, Roghayeh Motallebzadeh — Thu, 04 Jan 2024 11:47:31 +0330

The continuous growth of urbanization, the emergence of megacities, and the subsequent increase in their population have had various consequences among which the increase in consumption and demand for energy resources can be mentioned. Energy consumption has increased dramatically in the last few decades, which has also caused an increase in the production of greenhouse gases. The importance of energy at the global level is something that has been paid attention to a lot, in Iran also due to the increasing statistics of fuel consumption, optimizing and saving consumption is vital. Therefore, in this research, by using previous studies and computer simulation, we tried to investigate the effect of the factors involved in the energy consumption inside the building. In this regard, a building with office occupancy has been investigated in terms of energy consumption. The considered building has been simulated in Design Builder software and analyzed in terms of energy consumption and other factors in this simulator. In order to optimize energy consumption, intelligent lighting systems, phase-changing materials on external walls, 3-pane windows with high sealing, and natural ventilation have been used. As a result of using these solutions, the optimal building compared to the original building has improved energy consumption from grade C to grade B.

Corner Analysis of Current Starved Sleep stack Voltage Controlled Oscillator With Phase Locked Loop for higher stability

Annamma Kalaka, Saxena Saxena, Govind Singh Patel — Wed, 14 Feb 2024 00:00:00 +0330

This paper consists of a performance comparison of Current Starved Voltage Controlled Oscillator (CSVCO) for Phase Locked Loop (PLL). The work i.e. the design of Current Starved VCO is implemented using sleepy stack low power leakage technique. This has been implemented in 45nm CMOS Technology with a supply voltage of 0.45V in Cadence Software. The parameters like average power, oscillation frequency, and delay are calculated in different process corners showing the performance of improvement results of cadence simulation are reported. After comparison of the various parameters of PLL implemented with Sleep Stack CSVCO and Basic CSVCO, The sleepy stack approach is particularly useful in low power applications, The recommended PLL has a much smaller chip than previous designs, much lower power consumption and significantly higher efficiency. The proposed design of the PLL with Sleep Stack Technique makes the circuit efficiently to reduce sub-threshold leakage current, And achieves Frequency of 2.759 GHz, Power 2.559µw, phase noise -63.8(dBc/Hz) and Delay(µs) 0.0006544 respectively.

Optimum placement of DGs with the aim of reducing losses and improving the voltage profile

Abbas Jamshidi — Thu, 04 Apr 2024 00:00:00 +0330

Most of the share of losses in a power system is related to the distribution sector, which has always been considered. One of the important factors in increasing losses in the distribution network is the presence of reactive currents. The most common method of reactive power compensation in the power system is to use parallel capacitors. In addition to reducing losses, the advantages of capacitors include freeing up the capacity of the transmission network and improving the voltage profile. The issue of interest in capacitor placement is the optimal placement and evaluation of the capacitor in such a way that the profit from capacitor placement is maximized. Usually, the objective function in the existing optimal methods in the field of capacitors mostly includes reducing losses, improving the network voltage profile, or satisfying the two objectives mentioned together. The growing trend of exploiting distributed production units due to the many benefits of its use has caused the planners of the electricity industry in different countries of the world with different approaches to different aspects of exploitation as appropriate as possible from the investments made in this Study the field. Reducing the costs imposed on the electric energy supplier as well as the subscribers is one of the most important topics discussed in this field. In the meantime, categories such as reducing losses as a large share in operating costs and improving the quality of the voltage profile and voltage flashes as two main components in the quality of power delivered to the subscriber, directly and indirectly on the costs imposed on the company. Electricity and subscribers are influential.

Economic evaluation of photovoltaic systems in Chaharmahal and Bakhtiari villages

Abbas Jamshidi — Thu, 04 Apr 2024 00:00:00 +0330

The development of the country's villages is considered one of the most important and main of the government, for this reason, providing electricity to the villages is considered an important matter in order to achieve social justice. Chaharmahal and Bakhtiari province with high potential of solar energy is one of the provinces prone to use photovoltaic system to provide electricity to villages.

In this article, using economic evaluation indicators, two methods of electricity supply, one with photovoltaic system and the other as a nationwide network, are compared in the villages of Ab Be Kase and Shahryar Gorkanak of Kohrang County and at the end we will examine the results of economic indicators.

Intelligent Control of the Line Follower Robot with obstacle detection

M.Amir Kohestani, Mansour Hakimollahi, M Masih Tehrani, Dr. — Thu, 04 Apr 2024 00:00:00 +0330

Today, with the increasing development of technology and innovation, the Line Follower Robot is one of the examples of these technologies. The Line follower robot is a mobile machine that can detect and follow the line drawn on the floor. Generally, the path is predefined and can be either visible like a black line on a white surface with a high contrasted color or it can be invisible like a magnetic field, and here is used the ultrasonic sensor for detecting the obstacle in front of the robot . Therefore, this kind of Robot should sense the line with its Infrared Ray (IR) sensors that installed in front the robot. Hence, the Arduino microcontroller is going to decide the proper commands and then it sends them to the driver and the line follower robot will follow thus the path and obstacle will detect by ultrasonic sensor. The robot is driven by a DC gear motor and a DC servomotor for steering control with an Ackerman system to control the movement of the wheels. Arduino communication is used to run and implement algorithms to control the speed of the motors and guide the robot to move along the line smoothly. The aim of this project is to implement the algorithm for controlling the movement of the robot with the correct adjustment of the line following robot on a contrast line and as a result achieve better performance.

Organizational transformation strategy based on the cybernetic management model (case study, knowledge-based companies of Isfahan province)

nasrin valipour — Fri, 29 Mar 2024 00:00:00 +0330

Cybernetic management is a systematic model for understanding and developing a collective effort towards a better future. The current research was carried out with the aim of presenting an organizational transformation strategy based on the cybernetic management model (case study, knowledge-based companies of Isfahan province). Research method in terms of fundamental-applied goal; In terms of the data collection method, it was descriptive-survey and in terms of data type, it was a combination with an exploratory approach (qualitative-quantitative). The statistical community of the qualitative part of the research included experts in the knowledge-based field, 24 of whom were selected in a targeted non-random way, according to the principle of saturation. The statistical population of the research in the quantitative part included 547 knowledge-based companies in Isfahan province, and 354 people were selected as the sample size using the method of determining the sample in structural equations and the multi-stage cluster random sampling method. The tools of data collection were semi-structured interviews and researcher-made questionnaires. Test-retest reliability and intra-subject agreement method were used to calculate the reliability of the research interviews, which were confirmed. Also, in order to determine the validity of the questionnaire, face, content and construct validity were used, and the reliability of the questionnaire was calculated through Cronbach's alpha coefficient and composite reliability, all of which were approved. The results of the research showed that in order to achieve strategic transformation and achieve competitive advantage and guarantee the future of the organization, the components of cybernetic management transformation of knowledge-based companies in Isfahan province, including cognitive-skill competence, attitudinal-systemic competence and managerial competence, should be examined. Also, the findings showed that in order to match the organizational nature and mission, the components affecting internal factors (personal characteristics, professional planning, management, information technology) and external factors (executive policies, media and healthy society) have a suitable effectiveness coefficient. In addition, in the current research, the mechanisms, platforms and obstacles facing the mentioned companies were identified and suggestions were presented.