US 11,733,671 B2
Testing system having a control device
Masayasu Kanke, Tokyo (JP); and Takao Akiyama, Tokyo (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 16/971,862
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Dec. 19, 2018, PCT No. PCT/JP2018/046843
§ 371(c)(1), (2) Date Aug. 21, 2020,
PCT Pub. No. WO2019/163277, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-030884 (JP), filed on Feb. 23, 2018.
Prior Publication US 2021/0011454 A1, Jan. 14, 2021
Int. Cl. G05B 19/404 (2006.01); G01L 3/04 (2006.01); G01M 99/00 (2011.01); G01P 3/00 (2006.01); G05B 19/406 (2006.01)
CPC G05B 19/404 (2013.01) [G01L 3/04 (2013.01); G01M 99/00 (2013.01); G01P 3/00 (2013.01); G05B 19/406 (2013.01); G05B 2219/39188 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A testing system that includes an electric motor connected to a specimen via a connecting shaft,
an inverter that supplies electric power to the electric motor according to a torque current command signal,
a shaft torque sensor configured to generate a shaft torque detection signal according to a shaft torque generated in the connecting shaft,
a rotational speed sensor configured to generate a rotational speed detection signal according to a rotational speed of the electric motor, and
a control device comprising:
a plurality of resonance suppression controllers configured to generate a torque electrical-current command signal such that mechanical resonance between the specimen and the electric motor is suppressed, and having respectively different input-output characteristics, when a higher-order command signal for the torque current command signal, and the shaft torque detection signal are inputted;
a specimen characteristic acquisition unit configured to acquire a value of a characteristic parameter of the specimen connected to the electric motor;
a resonance suppression controller selection unit configured to select one among the plurality of resonance suppression controllers based on the value of the characteristic parameter acquired by the specimen characteristic acquisition unit, and
an operation verification unit configured to verify an effect of the resonance suppression controller selected by the resonance suppression controller selection unit by comparing a first calculated transfer function when a function of the resonance suppression controller is turned off and a second calculated transfer function when the function is turned on,
wherein the control device inputs the higher-order command signal and the shaft torque detection signal to the resonance suppression controller selected by the resonance suppression controller selection unit, and inputs to the inverter the torque current command signal generated by the resonance suppression controller selected.