1972-02-01

Control of Electro-Hydraulic Shaker by Digital Iteration Techniques 720823

The paper presents the results of a feasibility and conceptual study for on-line transient waveform control of nonlinear electrohydraulic test systems. The control concept is based on digital computing algorithms and the reciprocal properties of the fast Fourier transform used in the time-invariant vibratory system approach. In order to reproduce a specified time history at the test specimen, digital iteration techniques, which compensate the frequency coupling and the effects of nonlinearities on the electrical and mechanical components of the vibratory system, were used to define the test system transfer function. Successful control of prototype test systems are presented and discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: Purchase more aerospace standards and aerospace material specifications and save! AeroPaks off a customized subscription plan that lets you pay for just the documents that you need, when you need them.
X