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发表于 2016-4-23 02:06:29
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压力增益曲线仅适用于试验条件。它可以测量从P-> A和A-> T的压降与A口压力传感器。
通过阀的泄漏引起的压力降。也有B端口上的压力传感器来测量从P-> B和B-> T中的压降。 A和B端口由压力传感器堵塞。有油没有加压量必须加以控制。
压力增益曲线被用于阀门的精确建模,但对闭环控制的影响很小。
实际压力控制涉及很多因素,如油移动进入或离开的油的体积的压缩下,活塞是否正在改变的油在压缩下的体积。
JPG格式显示压力如何变化。
Pressure gain curve only applies to test conditions. It measures the pressure drop from P->A and A->T with pressure sensor on the A port.
The leakage through the valve causes the pressure drop. There is also a pressure sensor on the B port to measure the pressure drop from P->B and B->T. The A and B ports are blocked by the pressure sensors. There is no pressurized volume of oil that must be controlled.
The pressure gain curve is used for accurate modeling of the valve but has little effect on closed loop control.
Real pressure control involves many more factors like the oil moving into or out of the volume of oil under compression and whether the piston is changing the volume of oil under compression.
The jpg shows how pressure changes.
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