Journal Published Online: 01 May 1993
Volume 21, Issue 3

The Design of a Control System for a Superimposed Frequency Fatigue Test Machine



The conjoint action of high- and low-frequency fatigue on a test specimen has been obtained using a servohydraulic test machine. A control strategy was implemented such that only one servo-actuator was required to obtain both low- and high-frequency components. This paper describes the test rig and the decoupled automatic controller development for it.

Test results show that the decoupled strategy systhesis produces satisfactory separation of the low- and high-frequency modes of the closed-loop response.

Author Information

Stoten, DP
University of Bristol, Bristol, United Kingdom
Smith, DJ
University of Bristol, Bristol, United Kingdom
Pages: 6
Price: $25.00
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Stock #: JTE11764J
ISSN: 0090-3973
DOI: 10.1520/JTE11764J