What is the difference between a systems error and a systems uncertainty?
Submitted by: mreiser Submitted on: October 9, 2003 Identifier: L1.1 The ‘error’ is what we typically call the quantity that is fed back into the controller, the difference between the desired system set-point and the current one. This would be the difference between the commanded and current speed in the cruise control system. When we refer to a system’s ‘uncertainty’ we typically mean effects that have not been accounted for in our model of the system. These are things like changes in mass of a vehicle due to tread wear or fuel consumption, etc (for the cruise control example). Another example of system uncertainty is the electronic component inconsistencies in the example discussed in lecture 1. [Back to Top] • You seem to use uncertainty and disturbance interchangeably… Submitted by: waydo Submitted on: October 9, 2003 Identifier: L1.1 …are they the same? If not, what are the differences? The word “uncertainty” refers very broadly to anything we don’t know about the system, and
