DFSS and Robust Optimization Tool for Multibody System with Random Variables

Abstract

This study presents the DFSS optimization for the dynamic responses of a paper feeding mechanism. The flexible paper is idealized as a series of rigid bars connected by revolute joints and rotational spring dampers. In this mechanism, a paper is fed by a contact and friction mechanism on rollers or guides. The design objective is to minimize the slip amounts between paper and mechanisms and satisfy the 6-sigma constraint for the nip forces of rollers. In order to avoid the difficulty of design sensitivity analysis and overcome the numerical noise, a meta-model based optimization is employed. In this approach, first, the space filling methods and the classical DOE methods are used to generate sampling points. Second, the meta-models are constructed from the Kriging, RBF and RSM methods. Finally, a well-developed numerical optimizer sequentially solves the approximate optimization problem. In the numerical test, the DFSS for the paper feeding mechanism problem, having 8-random design variables, is solved in only 23 analyses.

An Enhanced Analytical Target Cascading and Kriging Model Combined Approach for Multidisciplinary Design Optimization

“…And discrepancy of variables in the neighborhood of the current solution will lead to fluctuation of the deviation, which will increase the number of iterations and so forth. Kriging model is appropriate for high nonlinear problem with better comprehensive performance, high approximation accuracy, and high robustness [20][21][22]. Moreover, fewer sample points also can get higher precision approximation model.…”

Robust optimization of structures subjected to frictionless unilateral contact with uncertain initial gaps

“…Gao et al (2020) studied a design optimization problem of a crank-slider mechanism, where robustness against increase of joint clearances and uncertainties of design variables is considered. Kim et al (2007) proposed a six-sigma design method for a paper feeding mechanism, where the mechanism involves frictional contacts between paper and rollers. Also, reliability-based design optimization of structures subjected to contact conditions was studied by Park et al (2000) and Cui et al (2003).…”

Modeling and Simulation about the Web Running of the Web-Fed Printing Press System Based on Rigid Coupling

“…Changho [3] establish the thin-film equations of motion, through the research mean thin film vibration characteristics. Min-soo KIM [4] summarized a set of novel modeling method of flexible body, modeling and simulation by using multibody system optimization tools of flexible body. Wu Jimei etc [5] .by researching the dynamic characteristic of the movement in the process of printing paper tape, established the vinbration model of the paper tape transverse.…”