Dynamometer control device

A dynamometer control device for controlling a test system including:

• a dynamometer coupled to an input shaft of a test piece provided with the input shaft and an output shaft;
• an inverter that supplies electric power according to a torque command signal to the dynamometer;
• a speed detector that generates a speed detection signal according to a rotational speed of the dynamometer;
• and
• a shaft torque detector that generates a shaft torque detection signal according to a shaft torque acting on the input shaft,
• the dynamometer control device being configured to generate the torque command signal by using a higher order command signal of the torque command signal, the speed detection signal, and the shaft torque detection signal,
• the dynamometer control device comprising:
• a first input signal generating unit that generates a first input signal based on a deviation between the higher order command signal and the shaft torque detection signal;
• a second input signal generating unit that generates a second input signal based on the speed detection signal weighted by a predetermined weight signal;
• and
• a torque command signal generating unit that generates the torque command signal based on the first input signal and the second input signal,
• wherein the second input signal generating unit makes a value of the weight signal when a value of the speed detection signal or a value of a filter signal obtained by passing the speed detection signal through a speed signal filter is less than a threshold value smaller than a value of the weight signal when the value of the speed detection signal or the value of the filter signal is equal to or greater than the threshold value, and
• wherein the speed detection signal is slower in rising from 0 than the shaft torque detection signal.