The design of Indirect Measurement Systems based on OE models

A method to design Indirect Measurement Systems (IMS) based on ouput-error (OE) models is the main issue of this article. The general procedure design is evaluated on non-invasive temperature estimation of an object that is inside of a sterilizer oven. The system performance is evaluated in terms of distributed temperatures sources: (a) actuator temperature source that is controlled by the electric thermal coil, (b) the object temperature source that is inside the oven, (c) the environment temperature source that contributes as perturbation to the oven temperatures. The IMS device is organized for implementation and analysis in terms of block diagrams that are characterized according to theirs influence in the non invasive measurements. The proposed indirect measurement device characterization is discussed in terms of embedded characterization, such as: accuracy, stability and frequency response of the IMS.