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公开(公告)号：US20190242779A1
公开(公告)日：2019-08-08
申请号：US16338906
申请日：2017-09-11
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Qingchao SUN , Bao ZHANG , Chuanhua WANG , Wei SUN , Yue MA
Abstract: The present invention provides a testing machine for accurately controlling looseness of a transverse load, and belongs to the technical field of mechanical testing devices. The testing machine for accurately controlling looseness of the transverse load uses a motor to control the generated transverse displacement, controls the generated transverse load by controlling the motor, and controls the motor through signal feedback from the sensor to keep the generated transverse load basically stable within a small range of a fixed value. Unlike the existing testing machine for looseness of the transverse load that can only provide one fixed transverse displacement load, the present invention can provide a desired stable transverse displacement load and can provide a desired stable transverse force load to adapt to simulation experiments for different bolt loading conditions.
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2.发明申请公开(公告)号：US20200018673A1
公开(公告)日：2020-01-16
申请号：US16338872
申请日：2017-09-08
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Qingchao SUN , Bao ZHANG , Chuanhua WANG , Wei SUN , Yue MA
Abstract: A closed-loop control method based on a testing machine for accurately controlling the loosening of a bolt transverse load is disclosed. The testing machine for accurately controlling the loosening of the transverse load comprises a load generating motor, a load transfer mechanism, a load control motor and a load control mechanism. The control method of the present invention controls the load generating motor to drive the load transfer mechanism based on control commands, displacement signals collected by the displacement sensor and force signals collected by an S-shaped column type pressure sensor. The testing machine for the looseness of the bolt transverse load is essential in the aspect of exploring a looseness law of a bolt, and can be used to simulate load bearing conditions of the bolt. However, under the condition that some bolts bear constant force load transversely, the testing machine is not used or is inaccurate. The control method of the present invention can accurately control the load transverse load to be stable, especially can ensure constant transverse load and can also simulate the transverse load bearing situation of the bolt more accurately and more comprehensively.
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