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Feedback, CNC interpolation, open and close loop control systems.

 


Feedback

Feedback is a fundamental concept in control systems and automation. It involves taking a portion of the output of a system and feeding it back to the input to influence the system's behavior. This creates a closed loop, allowing the system to monitor its performance and make adjustments to achieve the desired outcome.  

There are two main types of feedback:

  • Negative Feedback: This is the most common and useful type. It occurs when the feedback signal opposes the input signal. The goal of negative feedback is to reduce the error between the desired output (setpoint) and the actual output. This leads to stability, increased accuracy, and better disturbance rejection. Think of a thermostat: when the room temperature is below the setpoint, the heater turns on; when it exceeds the setpoint, the heater turns off.  
  • Positive Feedback: In this case, the feedback signal reinforces the input signal. Positive feedback can lead to instability, oscillations, and a "runaway" effect. While generally undesirable in control systems aiming for stability, it can be useful in specific applications like oscillators or triggering mechanisms.  

CNC Interpolation

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