An application-oriented approach to dual control with excitation for closed-loop identification

On Application Oriented Experiment Design for Closed- loop System Identification

Closed-loop separation control: An analytic approach

We develop an analytic approach to two-dimensional flow separation control by feedback. With two wall-based actuators enclosing an array of distributed wall-shear sensors, we control the wall-shear evolution equation through its boundary values at the actuators. Using this approach, we induce separation at prescribed locations in steady and unsteady channel flows, and reduce the recirculation l...

Minimal Required Excitation for Closed-Loop Identification: Implications for PID Control Loops

In industry, developing efficient and effective methods for using all the available data is important. Previous work has examined the ability to identify process models using closed-loop data where the reference signal is not being excited. However, it was shown that only with sufficiently large time delays or fast sampling rates could the data be used. Therefore, this paper will examine, in th...

Application to Adaptive Control to Synchronous Machine Excitation

Self-tuning adaptive control technique has the advantage of being able to track the system operating conditions so that satisfactory control action can always be produced. Self-tuning algorithms can be implemented easily. Because the power systems are usually time varying non-linear systems and their parameters vary, adaptive controllers are very suitable for power systems. Characteristics of a...

Bias Issues in Closed Loop Identification with Application to Adaptive Control∗

It is well known in system identification that, under output feedback control without persistent excitation, the resultant estimate of the process will be biased. In non-parametric identification the estimate is biased towards the negative inverse of the controller. A similar relationship is shown to exist for parametric identification. Indeed, we show the existence of a fundamental sensitivity...