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  2. Proportional–integral–derivative controller - Wikipedia

    en.wikipedia.org/wiki/Proportional–integral...

    The distinguishing feature of the PID controller is the ability to use the three control terms of proportional, integral and derivative influence on the controller output to apply accurate and optimal control. The block diagram on the right shows the principles of how these terms are generated and applied.

  3. Ziegler–Nichols method - Wikipedia

    en.wikipedia.org/wiki/Ziegler–Nichols_method

    The Ziegler–Nichols tuning (represented by the 'Classic PID' equations in the table above) creates a "quarter wave decay". This is an acceptable result for some purposes, but not optimal for all applications. This tuning rule is meant to give PID loops best disturbance rejection. [2]

  4. Closed-loop controller - Wikipedia

    en.wikipedia.org/wiki/Closed-loop_controller

    The control action is the switching on/off of the boiler, but the controlled variable should be the building temperature, but is not because this is open-loop control of the boiler, which does not give closed-loop control of the temperature. In closed loop control, the control action from the controller is dependent on the process output.

  5. Control loop - Wikipedia

    en.wikipedia.org/wiki/Control_loop

    A control loop is the fundamental building block of control systems in general and industrial control systems in particular. It consists of the process sensor, the controller function, and the final control element (FCE) which controls the process necessary to automatically adjust the value of a measured process variable (PV) to equal the value of a desired set-point (SP).

  6. Control system - Wikipedia

    en.wikipedia.org/wiki/Control_system

    The control action is the switching on/off of the boiler, but the controlled variable should be the building temperature, but is not because this is open-loop control of the boiler, which does not give closed-loop control of the temperature. In closed loop control, the control action from the controller is dependent on the process output.

  7. Chick-fil-A Changes Waffle Fries — and Customers Are Not ...

    www.aol.com/lifestyle/chick-fil-changes-waffle...

    Chick-fil-A fans are feeling a little spicy after the fast-food giant changed its recipe for waffle fries.. The chain recently posted a notice on its website announcing it had made "a slight ...

  8. Bitcoin 100K, Intel CEO ousted, job growth rebounds: 3 big ...

    www.aol.com/finance/bitcoin-100k-intel-ceo...

    This week, investors digested bitcoin's rally above $100,000, Intel's leadership shakeup, and monthly jobs data that keeps the Fed on track to cut interest rates.

  9. Integral windup - Wikipedia

    en.wikipedia.org/wiki/Integral_windup

    Within modern distributed control systems and programmable logic controllers, it is much easier to prevent integral windup by either limiting the controller output, limiting the integral to produce feasible output, [5] or by using external reset feedback, which is a means of feeding back the selected output to the integral circuit of all ...

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