Equipment set TP 511 – Basic closed-loop hydraulics training

Equipment set TP 511 – Basic closed-loop hydraulics training

Closed-loop hydraulics, Basic Level

Hydraulic closed-loop control circuits are normally operated with continuous valves. A control valve with integrated electronics, linear characteristic curve (volumetric flow to control piston position) and zero overlap makes commissioning easy and provides good results in the closed-loop control circuit.

 

Training content

Position control circuits:

  • Characteristic curve of a displacement sensor
  • Flow rate characteristics of a continuous directional control valve
  • Linear unit as a controlled system for position control
  • Designing and commissioning a position control circuit
  • Lag errors in the position control circuit
  • Position control with a changed controlled system
  • Commissioning a position control circuit with disturbances
  • Characteristics and transition functions of a status controller
  • Parameterising a status controller

Pressure control circuits:

  • Characteristic curve of a pressure sensor
  • Controlled system for pressure control
  • Characteristics of a PID controller board
  • Transition function of a P controller
  • Control performance of a pressure control circuit with P controller
  • Transition functions of I and PI controllers
  • Transition functions of D, PD and PID controllers
  • Empirical parameterisation of a PID controller
  • Parameterising using the Ziegler-Nichols method
  • Changed controlled system with disturbances

Controllers in hydraulics:

  • Controlled systems with and without compensation
  • Low-delay hydraulic controlled systems
  • First, second and third order hydraulic controlled systems
  • Classifying controlled systems according to their step response
  • Operating point and controller amplification
  • Discontinuous controllers
  • Block diagrams for discontinuous and continuous controllers
  • P, I, D, PI, PD and PID controllers
  • Status controllers
  • Selecting the controller structure
  • Disturbance reaction and control factor
  • Designing control circuits
  • Hydraulic, mechanical and electrical controllers
  • Analogue and digital controllers
  • Selection criteria for controllers

Valves and measuring systems:

  • Designation, circuit symbols and function of continuous directional control valves
  • Stationary characteristics and dynamic behaviour of continuous directional control valves
  • Function, design and mode of operation of a pressure regulating valve
  • Pressure control with a directional control valve
  • Mode of operation and interface of a measuring system

 

Also order:

Workbook

The 20 exercises in this book are used to introduce the fundamentals of analogue closed-loop hydraulics: pressure and position control with PID controllers and position control with status controllers. For extra task number 21, which deals with position control with disturbance variables and an active load, the cushioning cylinders for linear drives (order no. 152295), three additional tubing lines with quick connection coupling and a shut-off valve (order no. 152844) are required. These are not included in the scope of delivery.

The workbook contains:

  • Sample solutions
  • Training notes
  • Worksheets for students

Supplementary media

  • Designing and simulating with FluidSIM®
  • Measuring and controlling with FluidLab®
  • WBT Hydraulics
  • WBT Electrohydraulics
  • WBT Open- and closed-loop control
  • Textbook: Proportional hydraulics, Basic level
  • Hydraulics poster set

 

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