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The step test method for bumping a self-regulating process in order to determine dead time, process time constant, and process gain is straightforward when dealing with a self-regulating process. However, I've been unable to find any equivalent test procedure for a non self-regulating process. Obviously, a non self-regulating process will never reach any equilibrium after making a step change. So, a different approach would be needed, but I've been unable to find any source of information that deals with this situation. Can anyone point me to a procedure that will determine the process parameters?
The process that I'm trying to tune is second order with minimal dead time. This is a motion control process where we are trying to lock onto a slowly moving target (in one dimension), but the process variable that we are controlling is acceleration (which can be positive or negative). So, what the controller is controlling is the 2nd derivative of what we are measuring.
The process that I'm trying to tune is second order with minimal dead time. This is a motion control process where we are trying to lock onto a slowly moving target (in one dimension), but the process variable that we are controlling is acceleration (which can be positive or negative). So, what the controller is controlling is the 2nd derivative of what we are measuring.