A Discrete Time Slide Mode Observer's New Composition

—Ease Applicable Conditions for an Error Estimation Observer—

Abstract

In control theory, SMC is a nonlinear control method. The main strength of SMC is its robustness SMC can be used in the design of state observer. Therefore, the design method of the VSS observer that has robustness is proposed. The actual control is addition of the equivalent control and the nonlinear control. Nonlinear control is applied for control of state errors. Furthermore, a system becomes stable by applying the nonlinear control. We derive new nonlinear control. The control uses a composition of the discrete time slide mode observer and the error presumption observer. Thereby, an applicable condition can be eased.