Smar & USP Present Initial Results

Sunday, November 18, 2001

The cooperative efforts of SMAR and USP (São Paulo University) to develop new technologies for process control has started to produce results. The first scientific paper: "Foundation Fieldbus State Estimator Function Block", by Mário Pinotti Jr. and Dennis Brandão, was presented during ISA 2001 Technical Conference held in Houston, Texas. This article is of extreme imposrtance because it shows the viability of establishing control of plants in Foundation Fieldbus networks utilizing the variable state theory. The great challenge of implementation of modern control is FF networks was overcome as relayed in this article presented at ISA congress.

In the SMAR device, the core of this work comprises the programming and implementation of a new Function Block that executes the calculations of state space and is compatible with other Function Blocks. To test it, the temperature of an oven was controlled, and its results compared with the traditional solution where PID controllers were used. The results demonstrated a new alternative for control of plants that may present advantages, in specific cases, in relation to conventional solutions.

This new technology presents a sizeable opportunity to address many control problems. The use of adaptive control, robust and random for neural networks, etc., was previously impracticable due to the nonexistent State Space Function Block. The development of this new Function Block will now make control in FF networks possible.