Title:
METHOD AND DEVICE FOR CONTROLLING MATERIAL-TESTING MACHINE FOR FATIGUE CRACK GROWTH TEST
Document Type and Number:
Japanese Patent JP3787246
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the shock generation of a material-testing machine when the control mode is changed while the material-testing machine is maintained to be in operation during the execution of a fatigue crack growth test.
SOLUTION: When a control mode is to be changed a feedback FD signal for allowing the actuator mechanism of a material-testing device 10 to be subjected to feedback control and a target value signal DS, the feedback signal FD is maintained as it is without changing and the target value signal DS is switched, thus using the amplitude detection value of physical quantity that is detected immediately before the control mode is changed and is set to a control target after the control mode is changed as the amplitude target value of the physical quantity after the control mode is changed, and allowing the amplitude of the target value signal to be subjected to feedback control. When the control mode is to be changed, the feedback and target value signals maintain complete continuity, thus completely eradicating anxiety where the material- testing machine generates shock.
Inventors:
Hiroshi Uno
Application Number:
JP22340699A
Publication Date:
June 21, 2006
Filing Date:
August 06, 1999
Export Citation:
Assignee:
Saginomiya Co., Ltd.
International Classes:
G01N3/32; (IPC1-7): G01N3/32
Domestic Patent References:
| JP1114738A | ||||
| JP62153729A | ||||
| JP55125539U | ||||
| JP11037912A | ||||
| JP58211626A |
Attorney, Agent or Firm:
Hideo Takino
Sadao Matsumura
Sadao Matsumura
Previous Patent: IMAGE DISPLAY DEVICE FOR DIGITAL CAMERA
Next Patent: CERAMIC SHEET AND ITS PRODUCTION PROCESS
Next Patent: CERAMIC SHEET AND ITS PRODUCTION PROCESS