Command Governors with Inexact Optimization and Without Invariance

Command governors for constrained nonlinear systems

A method is described for set-point tracking in nonlinear systems when pointwise-in-time input and/or state inequality constraints are to be enforced. It consists of adding to a primal compensated system a nonlinear device called command governor (CG) whose action is based on the current state, set-point and prescribed constraints. The CG selects at any time the system input via a receding-hori...

Command Governors for Constrained Nonlinear Systems: Linearization-based Strategies

A comparison between two diierent command governors strategies (CG) is described. A CG is a nonlinear device which is added to a primal compensated system. The CG action, based on the current state, set-point and prescribed constraints, is nalized to select, at any time, a command sequence under which the constraints are possibly fulllled with acceptable tracking performance. The two CG's diier...

Reference and command governors for systems with constraints: A survey on theory and applications

Reference and command governors are add-on control schemes which enforce state and control constraints on pre-stabilized systems by modifying, whenever necessary, the reference. This paper surveys the extensive literature concerning the development of such schemes for linear and nonlinear systems. The treatment of unmeasured disturbances and parametric uncertainties is also detailed. Generaliza...

Inexact Newton-type Optimization with Iterated

This paper presents and analyzes an Inexact Newton-type optimization method 4 based on Iterated Sensitivities (INIS). A particular class of Nonlinear Programming (NLP) problems 5 is considered, where a subset of the variables is defined by nonlinear equality constraints. The pro6 posed algorithm considers any problem-specific approximation for the Jacobian of these constraints. 7 Unlike other i...

Hybrid Command Governors for Idle Speed Control in Gasoline Direct Injection Engines