Browsing by Autor "Juan Camilo Blanco"

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Methodology for the Design of a Double-Wishbone Suspension System by Means of Target Cascading: Model-Geometry Interactions and Case Study
(2013) Juan Camilo Blanco; Luis Muñoz
<div class="section abstract"><div class="htmlview paragraph">Target cascading methodology is proposed as an efficient approach to the design optimization of the geometry of a double-wishbone suspension system of an off-road vehicle. The geometric setting of the suspension plays an important role on its performance, as well as on the interactions with other design domains of the overall system. In order to organize the complexity of this system, two types of hierarchies are established: a system hierarchy and a model hierarchy.</div><div class="htmlview paragraph">For the system-based hierarchical organization, four levels were identified to express the suspension design problem in an overall vehicle design context: a super-system at the top level, two system design levels at the second and third hierarchical levels, and a components level at the lowest level.</div><div class="htmlview paragraph">The model-based hierarchical organization considers four analysis models to investigate the suspension behavior: a steering DOF constrained kinematic model, a longitudinal, a handling and a ride dynamics model.</div><div class="htmlview paragraph">In the present work, the nature of the interactions between the dynamic models and the geometric design variables is analyzed. Based on these interactions, the flow of geometric information between models is identified and a hierarchical organization of the dynamics models is proposed.</div><div class="htmlview paragraph">The proposed methodology is applied to the design and optimization of the suspension geometry of a hybrid off-road vehicle. In this application the advantages of a deeper knowledge on the problem nature are shown, as more flexibility is gained in the decision making process when special geometric interactions and restrictions must be considered.</div></div>
Methodology for the Design of a Double-Wishbone Suspension System by Means of Target Cascading: Problem Statement
(2013) Juan Camilo Blanco; Luis Muñoz
<div class="section abstract"><div class="htmlview paragraph">The target cascading methodology allows dealing with multi-domain coupled design problems. With this methodology, a complex design and optimization problem is decomposed into reduced-order problems in an ordered hierarchical structure, without losing the information about the coupling interactions between them. The order-reduction and partition of the original design problem not only bring computational advantages in the solution process, but also permit the designer to have a deeper insight of the problem nature.</div><div class="htmlview paragraph">This work is centered in the geometric problem related to the design and optimization of a double-wishbone suspension system of an off-road vehicle. Given the nature of this problem, the target cascading methodology is proposed as an efficient solution approach. This methodology recognizes that the suspension system plays an important role in the interactions at different levels of the design problem including system dynamic response and systems physical interactions.</div><div class="htmlview paragraph">Two types of hierarchies are considered in parallel, a system-type hierarchical decomposition of the overall vehicle problem and a discipline-type decomposition of the suspension kinematic and dynamic problem. Four levels are proposed for the system-type hierarchical partition: a super-system at the top level, two system design levels at the second and third levels, and a components level at the fourth level. Four analysis models of the suspension problem are proposed: suspension kinematics and longitudinal, lateral and vertical dynamics models.</div><div class="htmlview paragraph">The general hierarchical design scheme is presented. As the solution methodology depends strongly on the variable definition, a suitable set of geometric design variables that fully describe the suspension configuration is proposed.</div></div>
Target Cascading Optimization of the Kinematics of a Steering System Coupled to a Double Wishbone Suspension System of a Hybrid Off-Road Vehicle
(2013) Juan Camilo Blanco; Luis Muñoz