Design control systems using root locus
The root locus method, developed by W.R. Evans, is widely used in control engineering for the design and analysis of control systems. In this method, the closed-loop system poles are plotted against the value of a system parameter, typically the open-loop transfer function gain.
This method is popular with control system engineers because it lets them quickly and graphically determine how to modify controller poles, zeros, and gain to position dominant closed-loop system poles in the desired locations.
For details, see Control System Toolbox.
Examples and How To
- Introduction to Controller Design (Tutorial)
- Cruise Control Design (Tutorial)
- DC Motor Speed Controller Design (Tutorial)
- Suspension Controller Design (Tutorial)
- Inverted Pendulum Controller Design (Tutorial)
- Aircraft Pitch Controller Design (Tutorial)
- Ball & Beam Controller Design (Tutorial)
- rlocus (Function)
- Root Locus Design (Documentation)
- pzmap (Function)
- sgrid (Function)
- zgrid (Function)
- Control System Designer app (Documentation)
- Root Locus Design for Electrohydraulic Servomechanism (Documentation)
See also: Bode plot, linearization, control systems, PID control, PID tuning, control design software, parameter estimation, Control System Toolbox