Modern control in building automation and control is increasing based on electrical signals as input and having transducers that produce electrical signals as a measure of the output. These are then fed into controller which acts upon the system being controlled.
What are Feed back Control Systems?
This type of control focuses on the outputs of the organization after transformation is complete. Sometimes called postaction or output control, fulfils a number of important functions. For one thing, it often is used when feedforward and concurrent controls are not feasible or are to costly. Sometimes, feedback is the only viable type of control available. Moreover, feedback has two advantages over feedforward and concurrent control. First, feedback provides managers with meaningful information on how effective its planning effort was. If feedback indicates little variance between standard and actual performance, this is evidence that planning was generally on target.
Read Further: http://www.strategic-control.24xls.com/en107
Let me thank my dear RG participants for quick responses- in particular Harry Barton Essel and Aparna Sathya Murthy. The matter is clear.
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