Tp之后,PV到达最终值63.2%之前的时间通常测试这些参数的最快的方法是将PID块置于手动模式,并且给CV输出一个小的阶跃(改变手动命令%Ref+13),然后测出PV的时域响应。对于慢速过程,可以手动完成:但是对于快速过程,则需要用数据表记录器或在计算机上记录数据曲线。CV的步长要能够引起可观察的PV变化,但也不能大到引起受测过程混乱。最好的步长是CV.上下限幅差值的2%~10%。
WEINSCHEL ENGINEERING VM – 4 / HO – 2. ON SALE!!!
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AGILENT 8591E SPECTRUM ANALYZER with Option 001, 004, 0
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HP 70842B ERROR DETECTOR
ADTECH AX / 4000 BROADBAND TEST SYSTEM ON SALE!!!!!!!
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National Insturments SCXI-1001 Frame, 5ea SCXI-1102, 1e
GL Communications MQMTD86125P Digital Central Office S
Advanced Energy Sparc-le 20 PN3152244 DC PULSING ARC Po
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HP 85640A RF Tracking Generator 300 KHz-2.9 GHz
HP 85640A RF Tracking Generator 300 KHz-2.9 GHz