Latest threads in ⧑ Industrial Control Groupshow only best voted threads
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ADC, DAC, servomotor.
Does anybody know what is popular ADC, DAC, and servomotor available nowadays. Should i contruct my own? thank you. Regards, Boen S. Liong
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16 years ago
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Autopilot: Altitude control system
Does anybody know how the vertical component of the wind is controlled in a autopilot, control system? Is it discreet? Is the component of the wind sampled? The reference is desired altitude change...
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16 years ago
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Where from do I get GEI-100517 (MODBUS for HMI Applications)
Hi Everybody, Can you please point me to some url from which I can get the following document: GEI-100517, "MODBUS for HMI Applications" Thanks in advance for your help. Regards, Santanu
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16 years ago
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Inverse tangent
Let w1 = tan-1(x) i.e. tan(x) = w1 w2 = tan-1(y) i.e. tan(y) = w2 w3 = w1 - w2 problem what is tan(w3) in terms of x and y. or: Let w1 = tan-1(x1/z1) i.e. tan(w1) = x1/z1 w2 = tan-1(x2/z2) i.e....
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16 years ago
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I'm newbie so I might understand more
Dear JCH! Even if You gain no applause on this group, the target You aim to is very good. And it's a dream for every control engineer to make it working. I fully disagree with You Peter, that we need...
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16 years ago
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Positive Position Feedback
Hello group! Have u heard of 'Positive Position Feedback' control technique?This i sused in vibration suppression. If u know the concept, could u explain how the 'positive' feedback doesnt make the...
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16 years ago
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conjugate
Suppose u(t) = sin(t). What is u*(t) (conjugate of u(t) )? Thanks. Regard, Boen S. Liong
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16 years ago
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s = jw
Hi, The main mathematical tool engineers use in control is Laplace transforms which enable one to take an ordinary differential equation(s) and express it in the form of a transfer function. For...
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16 years ago
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Modelling Hydraulic Systems
I was about to respond to a comment by Peter in the PIDD thread, then I realized it'd hijack the thread. So... Peter mentioned in his response that a hydraulic system can be modeled as a mass between...
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16 years ago
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Petty concept forgotten
hello guys, Plz show me theoritically how this system: y(t) = x(2t) is linear(i.e it has the properties of scaling and superposition) and also how it is non casual. Thanks
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16 years ago
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Brand new Foxboro I/A Modules for sale
Please visit Mention that you saw this newsgroup post, and take off 40% Thank you !
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16 years ago
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PID , PIDD , ART
Hi all, Who could explain me the difference between PID , PIDD and ART (active reasoning technology) ? These computation are used for temperatures controls. I know what is PID but concretely I don't...
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16 years ago
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Input shaping
I didn't want to hijack Doug Cooper's thread and this topic deserves its own. NO, it is a convolution on the motion profile. The motion profile is convoluted with two pulses about 180 degree from each...
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16 years ago
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Unusual Diff. Pressure switch sought
I'm dealing with a control problem that involves a differential pressure (D.P.) switch mounted across the check valve after the discharge of a pump will be one of four discharging into a common...
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16 years ago
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Used Legacy Fisher Provox boards
Have a number of pulled boards from running system. Please advise what your needs are! Also, visit for other surplus process control items. Thank you.
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16 years ago
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