Control-system Synthesis
S. A. Marshall · 1978
A control system is designed to meet certain performance requirements, which usually include system stability, steady-state accuracy, dynamic accuracy, and insensitivity to parameter changes. These performance requirements can be expressed either in terms of the system transient response (quantities such as the maximum overshoot, rise time, settling time, damping factor and undamped natural frequency of the desired dominant closed-loop poles) or in terms of the system frequency response (quantities such as the phase margin, gain margin, maximum magnification and error coefficients) or both.