| 摘要 |
PURPOSE:To permit test of ventilator for vehicle depending on various modes by obtaining a desired pressure variation pattern through feedforward or negative feedback control of abrupt pressure rise or drop in a chamber. CONSTITUTION:A simulated body 1 and a chamber 2 are partitioned through a bulkhead 3 fixed with a ventilator 4 for vehicle. Compressed air is then fed from a booster tank 7 through a pressure rise control valve 9 into the chamber 2 or the chamber 2 is evacuated through a pressure reducing control valve 12 into a pressure reducing tank 10. At that time, a boost control circuit 41 and a pressure reducing control circuit 42 control the opening of the pressure rise control valve 9 and the pressure reducing valve 12, respectively, in response to the outputs from an inner pressure detector 39 for chamber and a processing circuit 44. Temporal variation rate of pressure is previously recorded 43 and when a desired variation rate exceeds the recorded one, pressure is boosted or reduced at a higher variation rate through feedforward control. When a low variation rate is preferable, a correct target pressure is obtained through negative feedback control. |
