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BobGeneric t1_j4slwpb wrote

Reply to comment by rededelk in Does anybody have any good examples or uses of negative derivatives of displacement, such as absement, absity, and so on? Though it is easy to calculate, it’s hard to find use for it. by LunarSolar1234

A pure PID control is more of a calculation than an "if this than that" algorithm. There are different implementations, but at the end it's like output=errorKp + Kdd(error)/dt + Ki*integral(error)dt, where Kp, Kd and Ki are constants tuned to the system to be controled. This output is applied to an actuator that changes the system, and the objective is to zero the error. The PID control was originally a full analog circuit, done with operational amplifiers, so, no if/elses...

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