PID System Simulation Trainer

DESCRIPTION:

This trainer provides a comprehensive experimental introduction to the fundamentals of control engineering using an example of flow control. A pump delivers water from a storage tank through a piping system. The flow rate is measured by an electromagnetic sensor, which permits further processing of the measured value by outputting a standardized current signal. A rotameter indicates the flow. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is a control valve with electric motor operation. A ball valve in the outlet line enables defined disturbance variables to be generated. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected.

Process control software (MZ 650.50) is optionally available. The software permits the construction of a complete networked. The key process variables can also be represented, and control functions executed.

The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Featured :

• Experimental introduction to control engineering using an example of flow control₁
• Construction of the system with components commonly used in industry₁
• Digital controller with freely selectable parameters: P, I, D and all combinations₁
• Integrated 2-channel line recorder₁
• Construction of a complete networked system via Profibus interface possible

Specification :

• Trainer for control engineering experiments
• Flow control process, equipped with standard industrial components
• Flow rate measurement by electromagnetic sensor
• Rota meter for direct observation of the flow
• Generation of disturbance variables by ball valve with scale in outlet line
• Control valve with electric motor
• Digital controller, parameter sable as a P, PI or PID controller
• 2-channel line recorder
• Process variables X and Y accessible as analogue signals via lab jacks

Learning Objectives / Experiments

• fundamentals of control engineering
• real industrial control engineering components: controllers, transducers, actuators
• operation and parameterization of the local industrial controller

1. Manually (by keyboard)
2. Using the process control software

• investigation of disturbance and control response
• controller optimization
• investigation of the properties of the open and closed control loops
• processing of process variables using external equipment, e.g. oscilloscope or plotter

Technical Data

1. Storage tank : 30L

• Centrifugal pump
• power consumption: 550W
• max. flow rate: 230L/min
• max. head: 11m
• speed: 2.850min-1
• Rota meter: 0...1.960L/h
• Electromagnetic flow rate sensor: 0...6.000L/h
• Control valve with electric motor
• Kvs: 5,7m³/h
• stroke: 5mm
• characteristic curve equal-percentage

2. Valve-opening position sensor: 0...1.000 Ohm

• Line recorder
• 2x 4...20mA
• feed rate 0...3.600mm/h, stepped
• Controller
• process variables X, Y as analogue signals: 4...20mA

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