Magda J.M. Tavera

Comparison of Defuzzification Methods: Automatic Control of Temperature and Flow inHeat Exchanger

The objective of this work is to analyze the behavior of the traditional control and the fuzzy control, applying them in the flow and temperature control to the load of current of a heat exchanger, as well as the analysis of different methods of defuzzification, utilized just as itself this carrying out the fuzzy control. Acting on the structure of the fuzzy controller some changes of form are carried out such that this tune in to be able to obtain the answer but optimum. In the same way proceeds on the traditional controller, and in this way comparisons on these two types of controls are established. Inside the changes that are carried out on the fuzzy controller this form of defuzzification the information, that is to say the methods are exchanged defuzzification in order then to realize comparisons on the behavior of each one of these.

Automated Guided Vehicles (AGV): Searching a Path in the Flexible Manufacturing Systems

Automated Guided Vehicles (AGV): Searching a Path in the Flexible Manufacturing Systems Manufacturing systems are undergoing a noticeable evolution due to an intense technological progress in industrial robotics. Serial production has evolved into the concept of Flexible Manufacturing Systems (FMS), which encapsulate processes in automatic equipment that are capable of executing different operations, that before be performed in several stages and diverse equipments. Automated Guided Vehicle (AGV) systems have been frequently used as material handling equipment in manufacturing systems since the last two decades. Particularly, AGVs with trailers are, and will continue to be, the backbone of the material transport industry. The use of these systems has taken the attention of experts and researchers. They are numerous studies concerning AGV with trailers systems in literature; few of them deal with the adaptation of these systems into FMS. In this paper, a study of the trajectories and a simulation model of a hypothetical system, which included a FMS environment, were developed. In addition, a potential fields method was explored in order to improve the ability of detecting obstacles in AGVs with trailers moving through stations. Pojazdy Kierowane Automatycznie (AGV): Poszukiwanie Drogi w Elastycznych Systemach Wytwarzania Produkcja seryjna wyewoluowała w kierunku koncepcji Elastycznych Systemów Wytwarzania (FMS), która obejmuje procesy technologiczne wykonywane przy zastosowaniu urządzeń automatyki. Od dwóch dekad do transportu i podawania materiałów w systemach wytwarzania stosuje się często układy Pojazdów Kierowanych Automatycznie (AGV). W szczególności, takie pojazdy z przyczepami są i w dalszym ciągu będą szkieletem systemów do transportu materiałów produkcyjnych. W niniejszym artykule przedstawiono badania nad trajektoriami (trasami przejazdów) i modelem symulacyjnym takiego hipotetycznego systemu, który został opracowany jako część środowiska Elastycznych Systemów Wytwarzania (FMS). Dodatkowo została zbadana potencjalna metoda badań w terenie pozwalająca na poprawę wykrywalności przeszkód utrudniających ruch Pojazdom Kierowanym Automatycznie z przyczepami przejeżdżającymi przez stacje.