Artigo PID Elton Luiz Vieira

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CONTROLE P, PI E PID, APLICAC
¸ OES
PARA CONTROLE DE PROCESSOS
Elton Luiz Vieira∗
∗

Rua S˜ ao Paulo, 33 Apto 04
Bairro Vila Rica
Herval D’ Oeste, Santa Catarina
Email: [e-mail]
Abstract— The control system of proportional-integral-derivative, also known as PID control, a generic form is a control loop of a particular mechanism, which every day gets more space in industrial areas. A PID controller attempts to correct the error between the measured process variable and the desired setpoint, reference value, through a corrective action that can adjust the process as desired.
The calculation of the PID controller algorithm involves three separate parameters. The calculation of proportional, integral values and derivative values. The proportional value determines the reaction to the current error, the full value determines the reaction based on the sum of recent errors and the value derived from the reaction determines the rate at which the error has changed.
Adjusting the three PID control constants, we can provide the desired control action requirements process. Some applications may be satisfied through the implementation of one or two control parameters. However, this is determined by demand and complexity of the system to be controlled.
In recent decades several manufacturers of industrial automation equipment have developed and improved its industrial controllers. These, and perform process control for interlocking logic, also have the PID control action in order to perform continuous process control, for example, speed control, pressure control, level control, among other applications. The large variety of industrial controllers and consequently, the wide variety of implementations PID instruction means, often missing standardization of programming and operation of the PID algorithm of the equation implemented in several industrial controllers. This fact complicates the engineering of industrial automation to develop through continuous