Process control architecture with hydrodynamic correction

A process control system, comprising:

• a hydrodynamic model of the level of a fluid within a container subject to externally-excited motion;
• a system to monitor at least accelerations of the fluid and the container;
• and
• a logic circuit which uses at least a first determination of the level and the accelerations to calculate a second determination of the level
• wherein the hydrodynamic model simulates modes and frequencies of the container at different heights of the fluid in the container, and/or different viscosities of the fluid.

A process control system, comprising:

• means for receiving measurements related to the amount of a fluid in a container;
• means for monitoring movements of the fluid and/or the container;
• and
• means for using the measurements and a hydrodynamic model which simulates the container to generate modified measurements;
• wherein the hydrodynamic model simulates modes and frequencies of the container at different heights of the fluid in the container, and/or different viscosities of the fluid.

A process control system wherein a container of a fluid is subjected to externally excited motion, comprising:

• a processor that has a built-in hydrodynamic model for data processing;
• at least one first sensor that measures the fluid;
• at least one second sensor that measures the movements the container;
• wherein said first and second sensors send the measurements to said processor to generate control signals for controlling a production process that the container is designed to do;
• and
• wherein the container is a blender in a cement blending system.