| 摘要 |
PURPOSE:To accurately simulate an actual vehicle run state and to take a brake test by computing electric inertial load corresponding to the run acceleration of a vehicle to be tested and bringing the output torque of a dynamometer under feedback control. CONSTITUTION:The detection signal of the rotating speed sensor 66 for the dynamometer 16 is inputted to an actuator 52 and the hydraulic pressure in the master cylinder 26 of a brake is so controlled that the detection signal coincides with the output of a speed reduction pattern generator 4. On the other hand, the fixed inertia W2 of a chassis dynamo which is set by a fixed inertia setter 76 is subtracted from the vehicle weight W1 of the vehicle 10 to be tested which is set by a weight setter 74 and the result is multiplied by deceleration alpha found by differentiating the output of the rotating speed sensor 66 to find the electric inertial load. This arithmetic output is collated by a collator 90 with the detected torque of a torque sensor 18 and electric power supplied from a three-phase AC power source 96 to the dynamometer 16 is controlled so that the fluctuating torque of the dynamometer 16 coincides with the electric inertial load.
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