Optimal sensor location in closed-loop control systems for fault detection and isolation

This paper describes the development and implementation of closed-loop control for oval stamp forming tooling using MATLAB®’s SIMULINK® and the dSPACE®CONTROLDESK®. A traditional PID controller was used for the blank holder pressure and an advanced controller utilizing fuzzy logic combining a linear quadratic gauss controller and a bang–bang controller was used to control draw bead position. The draw beads were used to control local forces near the draw beads. The blank holder pressures were used to control both wrinkling and local forces during forming. It was shown that a complex, advanced controller could be modeled using MATLAB’s SIMULINK and implemented in DSPACE CONTROLDESK. The resulting control systems for blank holder pressures and draw beads were used to control simultaneously local punch forces and wrinkling during the forming operation thereby resulting in a complex control strategy that could be used to improve the robustness of the stamp forming processes.

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Tuning of PID controllers in both open and closed loop control systems

Practical Process Control for Engineers and Technicians ◽

10.1016/b978-075066400-4/50008-2 ◽

2005 ◽

pp. 112-130

Keyword(s):

Control Systems ◽

Closed Loop ◽

Pid Controllers ◽

Closed Loop Control ◽

Loop Control

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Tangible Programming for Basic Control System New Frameworks to Engineering Education for Children

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.931-932.1298 ◽

2014 ◽

Vol 931-932 ◽

pp. 1298-1302

Author(s):

Thiang Meadthaisong ◽

Siwaporn Meadthaisong ◽

Sarawut Chaowaskoo

Keyword(s):

Control System ◽

Engineering Education ◽

Control Systems ◽

Primary Schools ◽

Closed Loop ◽

Open Loop ◽

Closed Loop Control ◽

College Level ◽

Loop Control ◽

Tangible Programming

Programming control in industrial design is by its nature expert upon an example being Programmable Logic Controller (PLC). Such programmes are unsuitable for children or novices as they cannot understand how to use the programme. This research seeks to present tangible programming for a basic control system in new frameworks in engineering education for children. Such programmes could be for use in kindergartens, primary schools or general teaching where knowledge about basic control is required. Normally open-loop and closed-loop control system programming is taught at university and college level. This may be late as far as acquiring knowledge of basic control systems is concerned. Using tangible programming without a computer but instructions and interface, relay and motor could result in children in kindergartens and primary schools being able to programme open-looped control systems which mix chemicals or closed-loop control systems which control conveyor belts. However, the children would not be able to undertake programming using programmable control in a similar scenario.

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