Virtual load monitoring system and method

A signal estimation method, comprising:

• obtaining at least one input state parameter;
• obtaining at least one estimated variable feature from said at least one input state parameter via an feature estimation model, wherein the feature estimation model maps relationships between at least one state parameter and at least one variable feature;
• and
• constructing an estimated signal from said at least one estimated variable feature and at least one fixed feature.

A method of generating a signal estimation model comprising:

• obtaining an actual signal during operation of a system;
• obtaining at least one state parameter during the same operation conducted for step of obtaining of the actual signal;
• extracting at least one fixed feature and at least one variable feature from the signal;
• constructing a variable feature estimation model that maps said at least one variable feature by said at least one state parameter in the feature estimation model;
• and
• constructing a synthesis model that synthesizes an estimated signal from at least one variable feature obtained using the feature estimation model and at least one fixed feature.