Lightweight Structure Design Under Force Location Uncertainty

10/26/2018
by   Erva Ulu, et al.
0

We introduce a lightweight structure optimization approach for problems in which there is uncertainty in the force locations. Such uncertainty may arise due to force contact locations that change during use or are simply unknown a priori. Given an input 3D model, regions on its boundary where arbitrary normal forces may make contact, and a total force-magnitude budget, our algorithm generates a minimum weight 3D structure that withstands any force configuration capped by the budget. Our approach works by repeatedly finding the most critical force configuration and altering the internal structure accordingly. A key issue, however, is that the critical force configuration changes as the structure evolves, resulting in a significant computational challenge. To address this, we propose an efficient critical instant analysis approach. Combined with a reduced order formulation, our method provides a practical solution to the structural optimization problem. We demonstrate our method on a variety of models and validate it with mechanical tests.

READ FULL TEXT

page 1

page 4

page 5

page 7

page 8

page 9

page 10

page 11

research
10/25/2018

Efficient Load Sampling for Worst-Case Structural Analysis Under Force Location Uncertainty

An important task in structural design is to quantify the structural per...
research
06/25/2019

Structural Design Using Laplacian Shells

We introduce a method to design lightweight shell objects that are struc...
research
10/27/2020

Internal contact modeling for finite strain topology optimization

The present work proposes an extension of the third medium contact metho...
research
12/26/2017

A MPC Walking Framework With External Contact Forces

In this work, we present an extension to a linear Model Predictive Contr...
research
03/22/2023

Theoretical Model Construction of Deformation-Force for Soft Grippers Part II: Displacement Control Based Intrinsic Force Sensing

Compliant grasping is an essential capability for most robots in practic...
research
04/21/2020

Identification of Compliant Contact Parameters and Admittance Force Modulation on a Non-stationary Compliant Surface

Although autonomous control of robotic manipulators has been studied for...
research
03/23/2023

Theoretical Model Construction of Deformation-Force for Soft Grippers Part I: Co-rotational Modeling and Force Control for Design Optimization

Compliant grippers, owing to adaptivity and safety, have attracted consi...

Please sign up or login with your details

Forgot password? Click here to reset