definition for gain margin and phase margin of control system
Phase margin Phase margin and its important companion concept, gain margin, are measures of stability in closed-loop, dynamic-control systems. Phase margin indicates relative stability, the tendency to oscillate during its damped response to an input change such as a step function. Gain margin indicates absolute stability and the degree to which the system will oscillate, without limit, given any disturbance.
Means of production Ownership of the means of production and control over the surplus product generated by their operation is the fundamental factor in delineating different modes of production. Capitalism is defined as private ownership and control over the means of production, where the surplus product becomes a source of unearned income for its owners. By contrast, socialism is defined as social ownership of the means of production so that the surplus product accrues to society at large.