Multi-Objective, Reliability-Based Design Optimization of a Steering Linkage

Abstract

Reliability-based design optimization (RBDO) of a mechanism is normally based on the non-probabilistic model, which is viewed as failure possibility constraints in each optimization loop. It leads to a double-loop nested problem that causes a computationally expensive evaluation. Several methods have been developed to solve the problem, which are expected to increase the realization of optimum results and computational efficiency. The purpose of this paper was to develop a new technique of RBDO that can reduce the complexity of the double-loop nested problem to a single-loop. This involves using a multi-objective evolutionary technique combined with the worst-case scenario and fuzzy sets, known as a multi-objective, reliability-based design optimization (MORBDO). The optimization test problem and a steering linkage design were used to validate the performance of the proposed technique. The proposed technique can reduce the complexity of the design problem, producing results that are more conservative and realizable.

Multi-Objective Reliability-Based Partial Topology Optimization of a Composite Aircraft Wing

“…A non-probabilistic approach, on the other hand, transforms this double-loop issue into a triple-looped nested problem due to the further addition of the possibility safety index (PSI) calculation. This issue can be solved using the target-performance-based design approach (TPBDA) [37], the interval perturbation method (IMP) [38], and the multi-objective reliability-based design optimization (MORBDO) using metaheuristics (MHs) [39][40][41]. This MORBDO root begins by solving a conventional aircraft aeroelastic problem using a worst-case scenario approach [39] followed by its extension technique investigation in a reliability-based design of steering linkage [41].…”

“…This issue can be solved using the target-performance-based design approach (TPBDA) [37], the interval perturbation method (IMP) [38], and the multi-objective reliability-based design optimization (MORBDO) using metaheuristics (MHs) [39][40][41]. This MORBDO root begins by solving a conventional aircraft aeroelastic problem using a worst-case scenario approach [39] followed by its extension technique investigation in a reliability-based design of steering linkage [41]. Its prolongation [37] to the topology optimization problem is called multi-objective reliability-based topology optimization (MORBTO), which can reduce the computational time of triple-looped nested problems [40].…”

Dimensional synthesis of rack-and-pinion steering mechanism using a novel synthesis equation

“…In the design of a steering mechanism, it is essential to know the sensitivity of the mechanism to changes in dimensions due to manufacturing, assembly, and wear errors in the kinematic pairs; this analysis is carried out after the optimization but can also be integrated into the optimization process [12][13][14].…”