An electric inertia control device 5A simulates the behavior of an inertial body having a predetermined set moment of inertia J.sub.set by means of a dynamometer, and is provided with: an inertia compensator 51A which generates a torque signal by multiplying a signal obtained by subtracting a shaft torque detection signal T.sub.12 from a higher-level command torque signal T* by the ratio of a moment of inertia J.sub.1 of the dynamometer to the set moment of inertia J.sub.set, and generates an inertia compensation torque signal T.sub.ref by summing the torque signal and the shaft torque detection signal J.sub.1; and a resonance suppression control circuit 53A which uses the inertia compensation torque signal T.sub.ref and the shaft torque detection signal T.sub.12 to generate a torque current command signal T.sub.1 in such a way as to suppress resonance in a mechanical system including a test piece and the dynamometer.

An electric inertia control device 5A simulates the behavior of an inertial body having a predetermined set moment of inertia J.sub.set by means of a dynamometer, and is provided with: an inertia compensator 51A which generates a torque signal by multiplying a signal obtained by subtracting a shaft torque detection signal T.sub.12 from a higher-level command torque signal T* by the ratio of a moment of inertia J.sub.1 of the dynamometer to the set moment of inertia J.sub.set, and generates an inertia compensation torque signal T.sub.ref by summing the torque signal and the shaft torque detection signal J.sub.1; and a resonance suppression control circuit 53A which uses the inertia compensation torque signal T.sub.ref and the shaft torque detection signal T.sub.12 to generate a torque current command signal T.sub.1 in such a way as to suppress resonance in a mechanical system including a test piece and the dynamometer.

A dynamometer device (1) is equipped at a tip end part of a dynamometer (3) with a cover (5) that covers the periphery of a torque meter (14). The cover (5) is formed on its side surface with an opening section (41) that is equipped with a door (42), and a rotation shaft is locked by inserting a locking plate (52) through this opening section (41). The locking plate (52) is slidably guided by a guide rail section. A part of an outer peripheral surface of the rotation shaft is provided with a surface to be locked that is along the tangential direction, and the rotation shaft is locked by engaging the locking surface (64) of the locking plate (52).

A dynamometer device (1) is equipped at a tip end part of a dynamometer (3) with a cover (5) that covers the periphery of a torque meter (14). The cover (5) is formed on its side surface with an opening section (41) that is equipped with a door (42), and a rotation shaft is locked by inserting a locking plate (52) through this opening section (41). The locking plate (52) is slidably guided by a guide rail section. A part of an outer peripheral surface of the rotation shaft is provided with a surface to be locked that is along the tangential direction, and the rotation shaft is locked by engaging the locking surface (64) of the locking plate (52).

A dynamometer device (1) is equipped at a tip end part of a dynamometer (3) with a cover (5) that covers the periphery of a torque meter (14). The cover (5) is formed on its side surface with an opening section (41) that is equipped with a door (42), and a rotation shaft is locked by inserting a locking plate (52) through this opening section (41). The locking plate (52) is slidably guided by a guide rail section. A part of an outer peripheral surface of the rotation shaft is provided with a surface to be locked that is along the tangential direction, and the rotation shaft is locked by engaging the locking surface (64) of the locking plate (52).

A dynamometer device (1) is equipped at a tip end part of a dynamometer (3) with a cover (5) that covers the periphery of a torque meter (14). The cover (5) is formed on its side surface with an opening section (41) that is equipped with a door (42), and a rotation shaft is locked by inserting a locking plate (52) through this opening section (41). The locking plate (52) is slidably guided by a guide rail section. A part of an outer peripheral surface of the rotation shaft is provided with a surface to be locked that is along the tangential direction, and the rotation shaft is locked by engaging the locking surface (64) of the locking plate (52).

The present invention is one that reproduces behavior close to an actual run of a vehicle in a test using a loading device, and is a specimen test apparatus that tests a specimen that is a vehicle or a part of a vehicle. The vehicle test apparatus includes; a loading device that is connected to a rotating shaft of the specimen and gives running resistance to the rotating shaft; a storage part that stores tire diameter data indicating the relationship between a running state of the specimen and a tire diameter; and a control part that, from the tire diameter data, calculates a tire diameter corresponding to a running state of the specimen, and controls the loading device with use of running resistance obtained from the calculated tire diameter.

The present invention is one that reproduces behavior close to an actual run of a vehicle in a test using a loading device, and is a specimen test apparatus that tests a specimen that is a vehicle or a part of a vehicle. The vehicle test apparatus includes; a loading device that is connected to a rotating shaft of the specimen and gives running resistance to the rotating shaft; a storage part that stores tire diameter data indicating the relationship between a running state of the specimen and a tire diameter; and a control part that, from the tire diameter data, calculates a tire diameter corresponding to a running state of the specimen, and controls the loading device with use of running resistance obtained from the calculated tire diameter.

An electric inertia control device 5A simulates the behavior of an inertial body having a predetermined set moment of inertia J.sub.set by means of a dynamometer, and is provided with: an inertia compensator 51A which generates a torque signal by multiplying a signal obtained by subtracting a shaft torque detection signal T.sub.12 from a higher-level command torque signal T* by the ratio of a moment of inertia J.sub.1 of the dynamometer to the set moment of inertia J.sub.set, and generates an inertia compensation torque signal T.sub.ref by summing the torque signal and the shaft torque detection signal J.sub.1; and a resonance suppression control circuit 53A which uses the inertia compensation torque signal T.sub.ref and the shaft torque detection signal T.sub.12 to generate a torque current command signal T.sub.1 in such a way as to suppress resonance in a mechanical system including a test piece and the dynamometer.

An electric inertia control device 5A simulates the behavior of an inertial body having a predetermined set moment of inertia J.sub.set by means of a dynamometer, and is provided with: an inertia compensator 51A which generates a torque signal by multiplying a signal obtained by subtracting a shaft torque detection signal T.sub.12 from a higher-level command torque signal T* by the ratio of a moment of inertia J.sub.1 of the dynamometer to the set moment of inertia J.sub.set, and generates an inertia compensation torque signal T.sub.ref by summing the torque signal and the shaft torque detection signal J.sub.1; and a resonance suppression control circuit 53A which uses the inertia compensation torque signal T.sub.ref and the shaft torque detection signal T.sub.12 to generate a torque current command signal T.sub.1 in such a way as to suppress resonance in a mechanical system including a test piece and the dynamometer.