Making a system behave, despite disturbance and uncertainty.
12 topics · 14 curated works
No prior grounding assumed.
Electronic Feedback Systems
James K. Roberge (MIT OpenCourseWare) · 1985
Builds classical feedback control design from a real operational amplifier's behaviour rather than an abstract block diagram, arguing that intuition…
Assumes you know the vocabulary.
Stabilized Feed-Back Amplifiers
H. S. Black · 1934
Deliberately throwing away gain and feeding the output back in opposition buys stability, linearity and bandwidth — the paper that made long-distance…
+1 more at this level
Primary sources and full treatments.
Regeneration Theory
Harry Nyquist · 1932
Shows that a feedback amplifier's stability can be read directly from how its open-loop response encircles a single point in the complex plane,…
+10 more at this level
12 of 14 works
James K. Roberge (MIT OpenCourseWare)
Builds classical feedback control design from a real operational amplifier's behaviour rather than an abstract block diagram, arguing that intuition for stability, noise and nonlinearity is best built from a physical circuit before it is generalised.
link checked 17 Sept 2026H. S. Black
Deliberately throwing away gain and feeding the output back in opposition buys stability, linearity and bandwidth — the paper that made long-distance telephony and, later, control practice possible.
link checked 17 Sept 2026J. G. Ziegler & N. B. Nichols
Derives simple tuning rules for proportional-integral-derivative controllers directly from a plant's open-loop step response, making good tuning achievable without solving the system's full dynamics.
link checked 17 Sept 2026Harry Nyquist
Shows that a feedback amplifier's stability can be read directly from how its open-loop response encircles a single point in the complex plane, without ever solving the closed-loop equations.
link checked 17 Sept 2026Hendrik W. Bode
Derives a fixed mathematical relationship between a feedback amplifier's gain and phase response, showing a designer cannot choose one without constraining the other — the basis of the gain and phase margins read off a Bode plot ever since.
link checked 17 Sept 2026Richard Bellman
States the principle of optimality — that an optimal policy's remaining decisions must be optimal given the state that results from the earlier ones — turning multistage decision problems into a recursion solvable stage by stage rather than all at once.
Richard Bellman
States a principle of optimality — an optimal policy has the property that, whatever the initial decision, the remaining decisions must be optimal for the resulting state — and uses it to turn multistage decision problems into a recursive functional equation.
link checked 17 Sept 2026Rudolf E. Kalman
Recasts the filtering problem in state-space form and derives a recursive estimator computed forward in time from a running covariance rather than by processing an entire signal history at once, making optimal estimation practical for real-time systems.
link checked 17 Sept 2026Rudolf E. Kalman
Defines controllability and observability as algebraic properties of a linear system's state-space representation, showing that feedback design and estimator design each depend on a different one of the two.
link checked 17 Sept 2026Karl Johan Åström & Peter Eykhoff
Surveys the methods then available for estimating a dynamic model from input-output data and organises them by the assumptions each makes about noise, giving system identification its first common framework and vocabulary.
Karl Johan Åström & Björn Wittenmark
Treats adaptive control as controller design where the plant model itself is estimated online, and argues the central design question is not whether to adapt but how fast, since adapting too quickly destabilises what adapting too slowly leaves uncorrected.
John C. Doyle, Bruce A. Francis & Allen R. Tannenbaum
Develops loop-shaping feedback design directly from the algebra of closed-loop transfer functions, treating performance and robustness to model uncertainty as one trade-off expressed in the same equations rather than as separate design steps.
link checked 17 Sept 2026