Dynamometer system

A dynamometer system comprising:

• an oscillating dynamometer main body;
• an inverter that supplies electric power corresponding to an inverter input signal to the oscillating dynamometer main body;
• a torque detector that generates a torque detection signal corresponding to a torque generated in an oscillator of the oscillating dynamometer main body;
• a speed detector that generates a speed detection signal corresponding to a rotation speed of an output shaft of the oscillating dynamometer main body;
• and
• a controller that generates the inverter input signal based on the torque detection signal and the speed detection signal, and inputs the inverter input signal to the inverter,
• wherein the controller includes:
• a feedback controller that generates a feedback input signal based on a deviation between a detection signal, which is either one of the torque detection signal or the speed detection signal, and a feedback command signal for the detection signal;
• a natural vibration suppression circuit that generates a correction signal for the feedback input signal to suppress a natural vibration of the oscillator based on the inverter input signal;
• an inverter input generator that generates the inverter input signal based on the feedback input signal and the correction signal;
• and
• a command generator that generates the feedback command signal based on the torque detection signal and the speed detection signal,
• wherein the command generator generates the feedback command signal from a travel resistance setting signal generated based on the speed detection signal and a driving force estimation signal generated based on the speed detection signal and the torque detection signal through band stop processing that attenuates a component within a predetermined stop band and allows a component outside the predetermined stop band to pass through.

A dynamometer system comprising:

• an oscillating dynamometer main body;
• an inverter that supplies electric power corresponding to an inverter input signal to the oscillating dynamometer main body;
• a torque detector that generates a torque detection signal corresponding to a torque generated in an oscillator of the oscillating dynamometer main body;
• a speed detector that generates a speed detection signal corresponding to a rotation speed of an output shaft of the oscillating dynamometer main body;
• and
• a controller that generates the inverter input signal based on the torque detection signal and the speed detection signal, and inputs the inverter input signal to the inverter,
• wherein the controller includes:
• a feedback controller that generates a feedback input signal based on a deviation between a detection signal, which is either one of the torque detection signal or the speed detection signal, and a feedback command signal for the detection signal;
• a natural vibration suppression circuit that generates a correction signal for the feedback input signal to suppress a natural vibration of the oscillator based on the inverter input signal;
• an inverter input generator that generates the inverter input signal based on the feedback input signal and the correction signal;
• and
• a command generator that generates the feedback command signal based on the torque detection signal and the speed detection signal,
• wherein the command generator generates the feedback command signal from both the speed detection signal and the torque detection signal through band stop processing that attenuates a component within a predetermined stop band and allows a component outside the predetermined stop band to pass through.