Papers by Keyword: Automatic Control

Abstract: In the article, it is proposed to build the electricity consumption system in the distribution network of “Azerishiq” LTD with innovative solutions. Compensation of reactive power, which causes losses of electrical energy, has been calculated and thus the power factor has been improved. The organization of automatic control of this system helps to reduce and save electricity losses, as well as leads to increasing the efficiency of the accounting system and increasing the flexibility of intelligent networks.

Abstract: A multi-section high efficient pumping unit was designed. The pumping unit has a multi-stage structure including forcer part of the use of linear motor and four-stage linear motor extract oil one after another. Consumption can be reduced and the operating efficiency of the machine can be improved. Each component of high efficiency linear pumping unit is introduced. Using power inverter to control pumping unit without complicated equipment and contact limit controller, pumping stroke adjustment can be realized. The control system adopts the vector control, high control precision and anti-interference ability.

Abstract: In order to provide appropriate thermal conditions current national regulations prescribe operative temperature as the base of design and operation. In simplified calculation procedure prescribed operative temperature can be provided using a corrected air temperature. Interrelation of operative and indoor air temperature has been investigated in function of overall heat loss coefficient and glazed ratio. Based on regression analysis necessary corrections in function of the above parameters are investigated, the consequences of neglected Mean Radiant Temperature are analysed. Operative temperature represents a control problem, too: disregarding the sensor itself its position in the room, the uneven distribution of radiant field in one room and in the rooms of a flat requires compromises. The possible solutions, their pros and cons are presented.

Abstract: The electromagnetic compatibility (EMC) of the whole system should be guaranteed to ensure the electronic and electrical equipments can work without interference from each other. The article introduces the scripting language of HFSS and details the architecture of automatic control technique for EMC. Finally, the antenna isolation analysis among 3 wire monopole antennas set on an oval carrier was taken as an example to demonstrate the calculation process.

Abstract: Programmable logic controller (PLC) is a basic and essential element in the engineering of industrial automation. Therefore, basic knowledge of the early stages of PLC plays an important role, especially for mechatronics and manufacturing engineering students. However, due to limited equipment available, high cost equipment, high trainer student ratios, and low reliability of existing equipment, many educational institutions do cannot provide the sufficient resources necessary to help students to become proficient with PLC technology. To alleviate these main problems, the PLC Trainer Kit Simulator is to be developed and used in the Automation Lab at Polytechnic of Sultan Abdul Halim Mu’adzam Shah (POLIMAS). The PLC Trainer Kit Simulator will be used to help student on PLC applications for basic course in JF506 Manufacturing Engineering Laboratory. This study is a descriptive study with a quantitative approach. Evaluation will be determined based on pre-test and post-test. This paper reviews the necessity of the simulation kit prior to its implementation. It is expected that, the teaching and learning processes could become more effective thus contribute to positive impacts on students’ interest in learning PLC.

Abstract: The paper presents theoretical dependences to calculate the main parameters of the pneumatic actuator of the multi-stage manually synchronized transmission depending on the parameters of the engine, the transmission and conditions of running resistance during the synchronization process at alternating pressure with different types of the air discharge into the pneumatic cylinder: critical, subcritical and at constant pressure. Comparison of results theoretical and experimental studies on the test stand shows that the calculated values of synchronization time on certain stages and throughout the cycles of the transmission shifting differ from the experimental data by 10-25% maximum.

Abstract: Hainan Island has a good reputation for "Coconut Island". The production of coconut is more than 80 percent in China. However, the development of coconut industry in Hainan lags behind when compared to other industries, because the comprehensive use ratio of coconut is still less. One reason of barring the coconut industry development owes to lacking of a good method to smash the coconut shell. Contraposing the current single method of smashed coconut shell, the low productivity and other problems, I design an achievable and automated coconut shell crusher based on the PLC control program to resolve the problem of artificial broken coconut shell, to save labor forces, to shorten labor time, to improve the production efficiency, to improve the utilization rate of coconut, to expand the economic benefits, and to promote the development of coconut industry.

Abstract: CNC technology is mechanical movement with digital information and work process control technology, data processing is the reverse engineering of important technical aspects, which determines whether the subsequent model reconstruction process easy and accurate manner. In this paper, CNC machining complex surfaces feature full potential of existing CNC equipment, automatic control system designed to make CNC machining equipment to achieve higher processing speed, high precision machining, and CNC equipment in order to achieve high efficiency machining.

Abstract: A simulation model of 230kV substation primary system and TSC+TCR typed dynamic reactive power compensation control system was constituted with RTDS, and the feasibility of control system with a case was validated. The control system was to monitor the variation of power system equivalent susceptance with sampling the power system voltage, established the relationships between power system susceptance and the firing angle of TCR, adjusted TSC switch and TCR firing angle to dynamically compensate the reactive power of power system. The simulation results demonstrate that the control system can guarantee power system voltage stability and real-time adjust power factor.

Abstract: Closely related to the actual output power and the light intensity, the temperature of the photovoltaic cell panel and the load of the PV array or the like. In the case of the external environment is stable and load conditions change, the output power of the PV modules exist Maximum Power Point, in order to improve the self-tracking PV system energy conversion efficiency, maximum power point tracking method may ensure the system running at maximum power points. Photovoltaic power generation system, optimize allocation method of PV array are also discussed in this paper.