Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1994-09-23
1996-04-30
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73805, G01N 300
Patent
active
055114318
ABSTRACT:
A structure testing machine for carrying out tests on a test structure (25) for an assessment of the response of the structure to test loads applied to the structure in the direction of a predetermined axis of the structure under the control of a monitored control system (21) which forms part of the machine and which has a forward path which includes an actuator (24) which is supported by a machine frame and which upon actuation applies to the test structure a test load in the direction of the predetermined axis, and a controller (22) responsive to a controller input signal and to controller parameters to apply to the actuator an actuating signal to cause the actuator to subject the test structure to a test load which produces dimensional changes in the test structure in the direction of the predetermined axis. The machine is provided with an adaptive control loop which comprises a stiffness estimator (27) which generates from the dimensional changes in the test structure adaptive control signals (E.sub.S) representative of the structure stiffness and adaptive control signals (E.sub.C) representative of the combined stiffness of the actuator, actuator support frame and the test structure, and means (30) to update the controller parameters of the controller to modify the forward path gain of the controller in response to the adaptive control signals thereby to adapt the machine to changes in the stiffness of the test structure relative to the combined stiffness of the machine and the test structure.
REFERENCES:
patent: 3304768 (1967-02-01), Naumann
patent: 4003246 (1977-01-01), Cain
patent: 4235114 (1980-11-01), Mohler
patent: 4802367 (1989-02-01), Petersen et al.
Chilcot Richard
Instron Limited
Noori Max H.
LandOfFree
Structure testing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure testing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure testing machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-621674