## What is pole placement technique in control system?

The pole placement technique is based upon an idea that closed loop automatic flight control systems’ pre- defined dynamic performances can be ensured by appropriate selection of the closed loop poles (Bokor et al., 2014), in other words, by selection of the state feedback gain matrix, say, K.

## What is pole placement problem?

Given a plant G(s), which may include the plant P(s) and feedback sensor F(s), can we find a controller C(s) that can place the roots of the characteris- tic polynomial is proscribed locations. This is known as the pole-placement problem.

**What is the necessary and sufficient conditions for pole placement approach?**

The necessary and sufficient condition for arbitrary pole placement is that the system is completely state controllable. If suppose the system is not completely state controllable then there are eigen values of matrix ABK that can not be controlled by state feedback.

### Is pole placement used to design a compensator?

Using pole placement techniques, you can design dynamic compensators. Pole placement techniques are applicable to MIMO systems.

### What is a pole placement via state feedback?

State-Feedback Gain Selection and the closed-loop poles are the eigenvalues of A-BK. Using the place function, you can compute a gain matrix K that assigns these poles to any desired locations in the complex plane (provided that (A,B) is controllable).

**What is controllability and observability?**

Controllability measures the ability of a particular actuator configuration to control all the states of the system; conversely, observability measures the ability of the particular sensor configuration to supply all the information necessary to estimate all the states of the system.

#### What are the sufficient conditions for design of state feedback controller through pole placement?

A necessary condition for pole placement using state feedback is that pair (A,b) is controllable, i.e., its controllability matrix, MC, is of full rank, where MC=[b,Ab,…,An−1b] .

#### What is breakaway point?

A breakaway point is a location on the real axis where the root locus branches either arrive or depart from the real axis (see Figure 5.7). From: Marine Systems Identification, Modeling and Control, 2015.

**What is a dominant pole?**

Dominant pole is a pole which is more near to origin than other poles in the system. The poles near to the jw axis are called the dominant poles.