Virtually all chemical processes are nonlinear, but for several of them linear feedback control is adequate. Therefore, before nonlinear controller design is attempted, it is natural to ask “When is linear control adequate for a nonlinear process?” to ensure favorable cost/benefit ratio. Consequently, methods are needed that quantify the nonlinearity of a process within the context of assessing...

linear state bisection is introduced as a new method to find time-invariant state feedback control laws for a special form of underactuated nonlinear systems. the specialty of the systems considered is that every unactuated state should be coupled with at least two directly actuated states. the basic idea is based on bisecting actuated states and using linear combinations with adjustable parame...

The perceptual control theory of Powers is used to analyse the market mechanism as a negative feedback loop which controls the deviation between demand (goal) and supply (perception) by adjusting the amount of effort invested in the production process (action), through the the setting of the price. The interconnection of distributed control loops for the different products and services facilita...

This paper presents some analyses about the robust practical stability of a class of nonlinear affine systems in the presence of non-vanishing perturbations based on the passivity concept. The given analyses confirm the robust passivity property of the perturbed nonlinear systems in a certain region. Moreover, robust control laws are designed to guarantee the practical stability of the perturbe...

Abstract— Tanks have an important role in protecting a region the event of battle. The tank's cannon is very reliable weapon warfare. However, cannon's precision while aiming and firing targets concern. A control system must be created to increase stability precision. state feedback technique with full-state observer that can manage disturbances. built around three DC motors, each which operate...