In overseas, the road sweeper have been producted. But, the expensive of import tax will befundamental problem for realisation the road sweeper from the overseas. The goal of this observationis making the the road sweeper which will be raised the amout in the future according UGM needed.And the part of the road sweeper is the sweeper itself. The problem which has been observated isgiving the proper testing for steel wire as the based material in making a sweeper. Because of that,for knowing the proper testing in the steel wire, then doing observation which has given a differenttreatment. As the component which has the work with lots of friction, so the sweeper must have highhardness, high wear resistance, and high tensile strength. Based on the result of spectrometer analiticreport which was did in science and accelerator technology laboratory- BATAN. Based on the resultpicture of micro sweeper structur observation with material stainless steel in litterature has asimilarity with the picture of austenite and ferrite micro structure which has several overages,especially in strength and high resistance to intergranular corrosion.
The search for the shortest path of the waste collection process is an interesting topic that can be applied to various cases, from a very practical basic problem to a complex automation system development. In a dense settlement, the waste collection system can be a challenging process, especially to determine the most optimized path. The obstacles can be circling streets, impassable roads, and dead-end roads. A wrong choice of method can result in wasteful consumption of energy. A possible method to solve the problem is the traveling salesman problem using ant colony search optimization, considering its relatively fast optimization process. Therefore, this paper proposes an application of ant colony and traveling salesperson problem in determining the shortest path of the waste collection process. The case study for the optimization algorithm application is the path UGM Sekip Lecturer Housing is considering. Firstly, the data was collected by measuring the distance between points. Then, the paths were modeled and then compared with the actual route used by waste transport vehicles. The last step is implementing the ant colony optimization and traveling salesman problem by determining the cost function and the parameters. The optimization process was conducted several times, considering the random generator within the algorithm. The simulation results show the probable shortest path with a value of about 752 meters so that the use of fossil fuels in waste transport vehicles can be more efficient. The results show that the algorithm can automatically recommend the minimized path length to collect waste.
This paper presents an investigation of the dimension variations on modular magnetorheological (MR) valve with meandering flow path structure. The size variations including the inner and outer radius of the valve at radial path. The first step is conducting FEMM (Finite Element Method Magnetics) to find out the density of magnetic flux on MR valve. The obtained magnetic field density is applied to steady state models to predict pressure drop. To determine the best configuration, pressure drop and operation range are the objective of the selection process. Based on the results, MR valve with 2.75 mm inner radius radial and 9 mm outer radius radial was chosen as the best MR valve design if compared to the other MR valve designs. The results obtained from the MR valve with 2.75 mm inner radius radial and 9 mm outer radius radial are 1.79 Mpa for the pressure drop and 6.68 for the operational range. Keywords: modular magnetorheological valve, optimization, objective function, smart materials
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