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  2. Causal loop diagram - Wikipedia

    en.wikipedia.org/wiki/Causal_loop_diagram

    The diagram consists of a set of words and arrows. Causal loop diagrams are accompanied by a narrative which describes the causally closed situation the CLD describes. Closed loops, or causal feedback loops, in the diagram are very important features of CLDs because they may help identify non-obvious vicious circles and virtuous circles.

  3. Nyquist stability criterion - Wikipedia

    en.wikipedia.org/wiki/Nyquist_stability_criterion

    The Nyquist plot for () = + + with s = jω.. In control theory and stability theory, the Nyquist stability criterion or Strecker–Nyquist stability criterion, independently discovered by the German electrical engineer Felix Strecker [] at Siemens in 1930 [1] [2] [3] and the Swedish-American electrical engineer Harry Nyquist at Bell Telephone Laboratories in 1932, [4] is a graphical technique ...

  4. System dynamics - Wikipedia

    en.wikipedia.org/wiki/System_dynamics

    The causal loop diagram of the new product introduction may look as follows: Causal loop diagram of New product adoption model. There are two feedback loops in this diagram. The positive reinforcement (labeled R) loop on the right indicates that the more people have already adopted the new product, the stronger the word-of-mouth impact.

  5. Root locus analysis - Wikipedia

    en.wikipedia.org/wiki/Root_locus_analysis

    The root locus of a feedback system is the graphical representation in the complex s-plane of the possible locations of its closed-loop poles for varying values of a certain system parameter. The points that are part of the root locus satisfy the angle condition.

  6. N2 chart - Wikipedia

    en.wikipedia.org/wiki/N2_Chart

    The data being transmitted can be defined in the appropriate squares. Alternatively, the use of circles and numbers permits a separate listing of the data interfaces. The clockwise flow of data between functions that have a feedback loop can be illustrated by a larger circle called a control loop. The identification of a critical function is ...

  7. Barkhausen stability criterion - Wikipedia

    en.wikipedia.org/wiki/Barkhausen_stability_criterion

    Block diagram of a feedback oscillator circuit to which the Barkhausen criterion applies. It consists of an amplifying element A whose output v o is fed back into its input v f through a feedback network β(jω). To find the loop gain, the feedback loop is considered broken at some point and the output v o for a given input v i is calculated:

  8. Schramm's model of communication - Wikipedia

    en.wikipedia.org/wiki/Schramm's_model_of...

    Schramm's model introduces a feedback loop between sender and receiver. [2] The role of feedback is one innovation of Schramm's model in comparison to earlier models. [3] [25] [16] Schramm sees communication as a dynamic interaction in which two participants exchange messages.

  9. Control–feedback–abort loop - Wikipedia

    en.wikipedia.org/wiki/Control–feedback–abort...

    The Control – Feedback Loop has been around for many years and was the key concept in the development of many electronic designs such as Phase-Lock Loops. [1] The core of the CFA loop concept was based on a major need that corporate executives and staff can anticipate the operation of systems, processes, products and services they use and ...