A self-contained, bench-mounted apparatus to demonstrate basic control of position or speed of a ball in a hoop, and more advanced studies of liquid slop.
Key features
• Self-contained and compact bench-mounting unit for basic control of position or speed, and advanced studies of liquid slop
• Demonstrates the problems of speed and position control of a mobile body or liquid in a container
• Mimics industrial, aeronautical, fl uid transport and pumping system problems with realistic results
• All inputs and outputs buff ered for connection to TecQuipment’s optional controllers or other suitable controllers
• Front panel includes a mimic diagram of the process so that students can see what they are controlling
Description
The CE109 Ball and Hoop Apparatus shows the use of electromechanical servo systems for position and velocity control. It also works as a model to show liquid slop problems, for example: aircraft missile fuel storage, fuel tankers and industrial pumping systems.
The apparatus has a steel ball that rolls inside a hoop. The hoop is free to rotate, but controlled by a servomotor. Transducers give outputs of the hoop and ball positions.
When the hoop is under angular position control, the ball moves like a cylindrical pendulum. This allows students to use it as a model for the study of liquid slop dynamics.
Advanced studies cover:
• The infl uence of liquid slop behaviour on vehicle control system design
• The use of ‘pole zero’ in the analysis of control systems
TecQuipment recommend that you use the optional Tachometer (OT1) for experiments in calibration of hoop velocity. Also, if you are not using the optional software, then an oscilloscope (OS1) will help to analyse the transient signals in some experiments.
Essential Base Unit
• Controller (CE120) – A controller with analogue and digital controls and instruments
or
• Digital Interface (CE122) – An interface which connects between most products in the Control Engineering range and a suitable computer (not included)
or
• Other suitable controller with +/– 10 V inputs and outputs
Both the CE120 and the CE122 include TecQuipment’s CE2000 Control Software (see separate datasheet) with editable, pre-made control experiments for use with the CE109.
Learning Outcomes
• The design and analysis of servo control systems for position and velocity control
• The analysis and modelling of liquid slop dynamics
• The use of ‘pole zero’ in the analysis of control systems
The fl exible design of the equipment allows the user to develop many other analysis and control exercises to suit their needs. It is good for extended or advanced control experiments, and is ideal for student project work.
