Pid control

Introduction to Control Process and Robotics
David Isai Robles González
david.robles@lasallistas.org.mx

May 18, 2012

Abstract
The Process Control and Robotics involve a wide range oftechnologies and sciences which together have become an important area of scientific development. In industries, are used to improve production systems, reduce costs, increasing safety or improve qualitycontrol in their products. These systems depend largely on the input variables to manipulate the mechanisms within the system and obtain the desired output.

• Controllers • Programmable logiccontrollers (PLC)

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Introduction

Process control is the automatic control of an output variable, comparing it to the desired output thus Figure 1: Block Diagram obtaining an error signal that is fedto the input of the system to reduce this error. In order to understand this in a better way, the control process could The control loops can be very complex, some of separated in differents controlblocks. the functions need to be very tightly controlled, with tight tolerance on the variables and a quick • Feedback loop response time, while in other areas the tolerances and response times are notso critical. In industrial • Controlled or measured variable applications such as supply chains, we must take into consideration that the system response is not • Manipulated variable givenautomatically. May have a lag time which is • Set point the time required by the system to return the result to a set point change and so on. • Instrument • Sensors • Transducers • Actuators 1 The Robotics isthe set of mechanisms that perform a specific task to manipulate external variables. Most have humanoid form, either the arm as shown in Figure 3 or the entire body. The robotic arms are used primarilyin manufacturing processes that has

David I. Robles G.

Control de Procesos y Robótica

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the literal meaning of "making things by hand".

Figure 3: Control Process and Robotics

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