| 摘要 |
A test-bed for automobile vehicles has pairs of coupled rollers to receive each of the wheels of the vehicle, with a tachymetric dynamo coupled to each pair. An electrical machine, capable of functioning selectively as a motor or as a generator is coupled to each pair of rollers. The circuitry of the electrical machines is such that the torque exerted (when they act as a motor) or the resistance coupled exerted (when they act as a generator) can be made to compensate exactly, at various speeds, for the differences which exist between the equivalent moment of inertia of the vehicle and the effective moment of inertia possessed by the rotating parts of the test-bed.
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