Open loop control vs. closed loop (feedback) control



The next two figures present the structures of open loop and feedback control systems.
Figure 1 shows an open loop control system whose function is to cause the output y(t) to follow the
reference r(t).
Feedback control system design for zero steady state error
In general, to follow a reference R(s) with zero steady-state error, the path between the
reference and the system output should contain a term like R(s). For instance, to follow a ramp
(velocity ....etc

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Introduction

Couplers, also known as isolators because they electrically isolate as well as transmit data, are widely used in industrial and factory networks, instruments, and telecommunications. Every one knows the problems with optocouplers. They take up a lot of space, are slow, optocouplers age and their temperature range is quite limited. For years, optical couplers were the only option. Over the years, most of the components used to build instrumentation circuits have become ever smaller. Optocoupler technology, however, hasn't kept ....etc

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Introduction

What is WLL?
- WLL is a system that connects subscribers to the local telephone station wirelessly.
Systems WLL is based on:
Cellular
Satellite (specific and adjunct)
Microcellular
Other names
Radio In The Loop (RITL)
Fixed-Radio Access (FRA). ....etc

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An industrial plant has hundreds or even thousands of control loops. The performance of control loops is important to ensure high product quality and low cost of the product in such plants. In general, oscillatory variables are one of the main causes for poor performance of control loops. Therefore, detection and diagnosis of the causes of oscillations in control loops is very vital for maintaining the product within the desired quality limits. Identification of such source signatures is a very important task in assessing closed loop control pe ....etc

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I want the ppt on cordect for presenting the seminar in college ....etc

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loop optimization in advanced system software ....etc

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ABSTRACT

Telecom infrastructure is a key catalyst for economic growth, and is one of the key focus areas for infrastructure development in developing countries. Telecom growth in these countries is hampered by the high capital cost of telecom equipment. There is a requirement for new telecom systems to be developed, keeping in view the affordability and the services required in these countries. corDECT is one such product, which is designed to be affordable to the common man in the developing economies, and provides all th ....etc

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Pl provide documentation for this topic for computer science power point presentation ....etc

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Definition

corDECT is an advanced, field proven, Wireless Access System developed by Midas Communication Technologies and the Indian Institute of Technology, Madras, in association with Analog Devices Inc., USA. corDECT provides a complete wireless access solution for new and expanding telecommunication networks with seamless integration of both voice and Internet services. It is the only cost-effective Wireless Local Loop (WLL) system in the world today that provides simultaneous toll-quality voice and 35 or 70 kbps Internet access to wirel ....etc

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corDECT Wireless in Local Loop System

corDECT is an advanced, field proven, Wireless Access System developed by Midas Communication Technologies and the Indian Institute of Technology, Madras, in association with Analog Devices Inc., USA. corDECT provides a complete wireless access solution for new and expanding telecommunication networks with seamless integration of both voice and Internet services. It is the only cost-effective Wireless Local Loop (WLL) system in the world today that provides si ....etc

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