Building management system with online configurable system identification

A method for controlling building equipment in a building management system, the method comprising:

• operating building equipment to affect a variable state or condition of the building;
• receiving, by a control system, a user input indicating a model form, the model form comprising a plurality of matrices having a plurality of elements, one or more of the plurality of elements defined in terms of a plurality of parameters;
• parsing, by the control system, the model form to generate a sequence of machine-executable steps for determining a value of each of the plurality of elements based on a set of potential parameter values;
• identifying a system model by executing the sequence of machine-executable steps to generate a set of parameter values for the plurality of parameters;
• generating a graphical user interface that illustrates a fit between predictions of the identified system model and behavior of the variable state or condition of the building;
• and
• controlling the building equipment using the identified system model.

A building management system comprising:

• building equipment operable to affect a variable state or condition of a building;
• and
• a control system configured to generate a graphical user interface that comprises:
• one or more dimension entry fields that allow a user to specify one or more of a number of inputs, a number of outputs, or a number of states of a model form;
• a matrix definition widget that allows a user to define each of a plurality of elements of a first matrix of the model form in terms of one or more of one or more constant values, one or more mathematical operations, or one or more parameters;
• a matrices list that allows a user to navigate to views of each of a plurality additional matrices of the model form in the matrix definition widget, each view allowing a user to define elements of one of the additional matrices;
• and
• a fit button selectable by a user to instruct the control system to:
• determine values for the one or more parameters based on the model form and a set of training data relating to the building to identify a system model;
• and
• provide, on the graphical user interface, a graphical representation of a fit between predictions made using the system model and measured behavior of the variable state or condition of the building;
• wherein the control system is configured to control the building equipment based on the system model.