Convergence of Laboratory Simulation Test Systems

Paper #:
  • 981018

Published:
  • 1998-02-23
Citation:
Meldrum, J. and Hay, N., "Convergence of Laboratory Simulation Test Systems," SAE Technical Paper 981018, 1998, https://doi.org/10.4271/981018.
Pages:
6
Abstract:
Laboratory Simulation Testing is widely accepted as an effective tool for validation of automotive designs. In a simulation test, response data are measured whilst a vehicle is in service or tested at a proving ground. These responses are reproduced in the laboratory by mounting the vehicle or a subassembly of the vehicle in a test rig and applying force and displacements by servo hydraulic actuators. The data required as an input to the servo hydraulics, the drive files, are determined by an iterative procedure which overcomes the non linearity in the test specimen and the test rig system. Under certain circumstances, the iteration does not converge, converges too slowly or converges and then diverges. This paper uses mathematical and computer models in a study of the reasons why systems fail to convergence and makes recommendations about the management of the simulation test.
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