State-space representation - Wikipedia
en.wikipedia.org › wiki › State-space_representationIn control engineering, a state-space representation is a mathematical model of a physical system as a set of input, output and state variables related by first-order differential equations or difference equations. State variables are variables whose values evolve over time in a way that depends on the values they have at any given time and on the externally imposed values of input variables. Output variables’ values depend on the values of the state variables. The "state space" is the ...
NASA - State Estimation
www.nasa.gov › state-estimationState Estimation is the problem of determining the current state of a complex system such as a spacecraft, given the stream of telemetry that has been seen from the system’s sensors so far. In the past, state estimation has mostly been seen as diagnosis—detecting and identifying faults when they occur—but safe and effective autonomous control of systems requires estimating all aspects of system state.