Showing papers on "Open-loop controller published in 1968"

Redundant, self-checking, self-organizing control system

Abstract: A self-organizing control system having a plurality of selforganizing controllers acting in parallel to provide actuation signals for plant control. The controllers are constantly monitored to locate faulty controllers. When one controller does not compare with the others, it is initially coerced to operate correctly and, after a predetermined period, if correct operation is not provided, the faulty controller is removed from the system. In one embodiment, an odd number of controllers is always in the system to provide control on a majority basis. Therefore, the removal of a faulty controller will require the removal of an operating controller as well.

Analog simulator for digital controllers

Abstract: now operational). Jack’s interests have naturally led him to analog and hybrid simulation. A recent project initiated is the hybrid interfacing of a TR-48 and PDP-8. I expect much interesting work to come out of this lab. The following paper discusses the design and construction of a D(z) (sampled-data compensator) simulator for use in analog studies of sampled-data systems. Jack tells me that it was inexpensive to build and hence should be of great interest to workers with limited budgets.

Speed control system for conveying machine energized by three-phase current

Abstract: An ideal value transmitter provides an ideal value voltage corresponding in magnitude to a desired speed of a conveying machine. An actual value transducer coupled to the rotor of the conveying machine provides an actual value voltage corresponding in magnitude to the actual speed of the machine. A three point controller connected to the transmitter and transducer provides a control signal equal to the difference in magnitude between the ideal and actual value voltages. Two reversing contactors coupled to the controller and connected to the stator of the machine supplies three-phase current to the machine under the control of the control signal provided by the controller. A direct current contactor coupled to the controller and connected to the stator of the machine supplies direct current to the machine under the control of the control signal.