Feedback control systems 45 System analysis 10 Automatic control 5 Control theory 5 Mathematical models 5 Congresses 2 Feedback (Electronics) 2 Functions of complex variables 2 Linear systems 2 Mathematical optimization 2 Vibration 2 Adaptive control systems 1 Biological control systems 1 Computer-aided design 1 Cybernetics 1 Decision-making 1 Differential equations 1 Discrete-time systems 1 Dynamic programming 1 Dynamics 1 Electronic digital computers 1 Fluidic devices 1 Game theory 1 Geometry, Differential 1 Industrial management 1 Integral equations 1 Linear programming 1 Nonlinear control theory 1 Periodicals 1 Plasma instabilities 1