Reduced Control Effort for Self-Tuning Regulators via an Input Window

Abstract Self-tuning regulators (STRs) have proven themselves to be well suited to many process control environments, especially in the case of unknown or slowly time varying parameters. However, for processes containing moderate to excessive noise levels the basic minimum variance type STRs may prove inadequate as the resulting control action may be excessive and costly. This paper presents a method of limiting the control action via an input window without unnecessarily exceeding output variance limitations.