Dynamometer control device

A dynamometer control device used in a test system including

• a dynamometer coupled to an input shaft of a test sample including the input shaft and an output shaft,
• an inverter that supplies, to the dynamometer, electric power corresponding to a torque command signal,
• a velocity detector that generates a velocity detection signal corresponding to a rotational velocity of the dynamometer, and
• a shaft torque detector that generates a shaft torque detection signal corresponding to shaft torque acting on the input shaft,
• the dynamometer control device using a higher command signal with respect to the torque command signal, the velocity detection signal, and the shaft torque detection signal to generate the torque command signal,
• the dynamometer control device comprising:
• a shaft torque controller that generates the torque command signal based on the higher command signal and the shaft torque detection signal;
• and
• an inertia compensator that feeds back, to the shaft torque controller, an inertia compensation signal generated by multiplying a set inertia value by the velocity detection signal,
• the shaft torque controller including a first low-pass filter that, from the higher command signal, allows a high-frequency component to decay and a low-frequency component to pass, and
• the inertia compensator including a second low-pass filter that, from the velocity detection signal, allows a high-frequency component to decay and a low-frequency component to pass.