ROAD GEOMETRIC FEASIBILITY IN ROAD SAGARANTEN – TEGALBULEUD KM.BDG 175 + 100

<p class="Normal1">The Sagaranten-Tegalbuleud road is a provincial road, with its geographic and topographic conditions quite complicated, the terrain quite difficult, causing not all areas to be well connected, and the reason for the low level of accessibility of this area. Therefore, determining the road geometry is an important part of driving comfort. Geometric planning focuses on horizontal and vertical alignments so that it can fulfill the basic functions of the road that provide optimal traffic flow comfort according to the planned speed. A re-survey was conducted to obtain geometric data on existing roads that did not comply with DGH standards, then it was re-planned. The results of the analysis are three bends with the Spiral-Circle-Spiral type, namely bend 9, bend 10 and bend 11 with RC = 17 m, and the slope is determined for the vertical geometrical alignment of the road. The results of this research analysis can be used as a reference for improving geometric roads so that accessibility between regions can be increased.</p>

An efficient method for exploded view generation through assembly coherence data and precedence relations

Purpose Three-dimensional exploded view is a schematic representation of a product anticipated for performing assembly or disassembly operations. Exploded view is found in many applications, such as product instructional materials, repair and maintenance handbooks. This paper aims to propose an efficient exploded view generation technique based on assembly coherence data and disassembly feasibility testing, and illustrate it on various configurations of assemblies. Design/methodology/approach The proposed methodology extracts the assembly contact information between the constituent parts and geometric feasibility relation matrix based on the common mating surface of part pairs in liaison and assembly collision detection. These data are further used for exploded view generation. Findings The proposed exploded view generation method determines the possible disassembly sequences and simplifies the procedure in determining the number of disassembly levels. Research limitations/implications The procedure consumes more time for the products with large number of part counts having numerous non-ruled surfaces. Originality/value The proposed method is effectively used to solve assemblies, where parts are assembled through oblique orientations. The method is found successful in generating exploded view for products with large number of parts through collision-free paths.

Design Methodology for Modularity Based on Life Cycle Scenario

Minimizing the environmental load and cost throughout the product life cycle requires appropriate life cycle design as well as product design. In life cycle design, we must determine the life cycle scenario at an early stage and design the product to realize this scenario. Modularity is a key to linking life cycle scenario to an appropriate product architecture because modular architecture increases performance in life cycle processes, such as disassembly, recycling, maintenance, reuse, and upgrading, by unifying components applicable to the same lifecycle scenario. We propose a method for determining modular structure based on life cycle scenario by evaluating the similarity among lifecycle-related components attributes. We also evaluate the modular structure's geometric feasibility using an index indicates rigidity and compactness of the modules.

An Optimization Based Approach for Determining Whether a Set of Elementary Contacts Is Geometrically Feasible

The contact between two polyhedral objects can be represented with a set of elementary contacts — surface-vertex and edge-edge contacts. However, not all possible contact representations are geometrically possible. An equivalent optimization problem is posed to verify geometric feasibility. A steepest descent algorithm has been implemented and applied to two test cases — one feasible and one infeasible contact representation. The results of this work can be used to implement a predicate that verifies whether a contact representation is geometrically possible. The predicate can be used in a generate-and-test paradigm to synthesize the entire contact space.