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7627397 |
Material-sensitive routing for shared conduit systems
A routing system for shared conduits used in industrial applications is sensitive to material types and material flow histories to allow compatible materials to flow through shared conduits without...
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7505818 |
Converter method, system and apparatus
An x to pressure converter that uses valves oscillating between open and closed positions in a pulse width modulated mode, to force the output pressure to equal the input X.
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7337041 |
Feedback control methods and apparatus for electro-pneumatic control systems
Methods and apparatus related to feedback control for electro-pneumatic control systems are disclosed. An example electro-pneumatic control system comprises an electro-pneumatic controller and a...
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7295899 |
Method and controller for setting a control element and a use of said controller
For setting the position of a control element, a controller and method according to the invention provide for impressing a required temporal characteristic of the actuating signal onto a should-be...
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7155319 |
Closed loop control on liquid delivery system ECP slim cell
A method for controlling liquid delivery in a processing chamber. The method includes generating an analog input (AI) signal proportional to a process variable and calculating an analog output (AO)...
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7092795 |
Turbine apparatus and governor for turbine
In a turbine apparatus comprising a runner rotatable to be rotationally driven by a water, a gain of a derivative calculation element generating a derivative component of a control signal for...
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7072744 |
Turbine apparatus and governor for turbine
In a turbine apparatus comprising a runner rotatable to be rotationally driven by a water, a gain of a derivative calculation element generating a derivative component of a control signal for...
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6957127 |
Dynamic current-to-pneumatic converter and pneumatic amplifier
A dynamically balanced pneumatic relay amplifier and a current-to-pneumatic converter are disclosed. The relay has a balance plug, a supply plug positioned on top of the balance plug, a bead chain...
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6907082 |
4-20 mA interface circuit
A 4-20 mA interface circuit for use, for example, in a valve controller, communicates with a two-wire loop. The interface circuit includes a power extraction circuit connected to the two-wire loop...
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6898467 |
Distributed control network for irrigation management
A system and method for operating a distributed control network for irrigation management. The system incorporates several irrigation controllers wherein each of the controllers can transmit,...
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6845300 |
Control methods for electromagnetic valve actuators
An electromagnetically operated valve assembly ( 28 ) has a first solenoid ( 58 ) and a second solenoid ( 60 ). An armature ( 56 ) having a valve stem ( 54 ) coupled thereto is positioned between...
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6819962 |
Method of evaluating, expanding, and collapsing connectivity regions within dynamic systems
An automated process defines and maintains connectivity regions within a dynamic network. The automated process requires an initial input of a network component around which a connectivity region...
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6789000 |
Microprocessor-based control system for gas turbine electric powerplant
A microprocessor-based control system for a gas turbine electrical powerplant the microprocessor-based control system controls the startup, operation, and shutdown of the gas turbine electric...
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6725103 |
Process control system
A process control system in a multi-input/output coordinate control system for executing coordinate control of a main input. The process control system sets an operating point set value for an...
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6701223 |
Method and apparatus for determining optimal control settings of a pipeline
Pipelines are controlled by specifying operations along them. Control specifies sequential control values defining operations at each station to control the pipeline state. The time-dependent state...
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6480750 |
Controlling system and method for operating a controlling system
A controlling system having a controller which acts on a controlled system as a function of a manipulated variable and a number of controller parameters is intended to provide a given control...
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6445980 |
System and method for a variable gain proportional-integral (PI) controller
A method for generating a valve drive signal using a variable gain PI controller in a mass flow controller. The method includes multiplying an error signal with a proportional gain factor to...
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6351692 |
Method and apparatus for configuring a genset controller for operation with particular gensets
A genset controller that is configurable for controlling a variety of types of gensets, as well as a method of configuring a genset controller for controlling a genset, are disclosed. The genset...
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6240336 |
Control unit for an irrigation system
A control unit for an irrigation system comprising a programmable electronic control unit having a plurality of output control lines for the control of actuators of the irrigation system and...
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6167323 |
Method and system for controlling gas system
Flow sensors 41 and 42 for detecting a flow load including the presence of a flow of gas are provided in supply lines 2a through 2d for supplying a given gas into a treatment chamber 6. A CPU 40 is...
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6038494 |
Control system for enhancing fish survivability in a hydroelectric power generation installation
A system for controlling a hydroelectric power production facility includes sensors for detecting the presence of fish adjacent to the facility. A controller linked to the sensors controls the...
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5099411 |
Digital method of controlling and regulating a turbine that has gas or steam flowing through it and device for carrying out the method
A digital arrangement for controlling a gas or steam turbine in which operating parameters of the turbine are sensed at a regular rate. Control parameters are then calculated from the operating...
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4975238 |
Control system for a nuclear steam power plant
A control system for a nuclear steam power plant having a reactor, one or more once through steam generators and a turbine includes a reactor control subsystem responsive to a power demand input to...
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4577281 |
Method and apparatus for controlling the control valve setpoint mode selection for an extraction steam turbine
A microprocessor-based controller for an extraction type steam turbine-generator unit capable of selecting from a variety of predetermined control strategies and implementing corresponding valve...
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4523286 |
Apparatus for making diagnosis of valve device in turbine system
A diagnostic apparatus for diagnosising of a valve device in a turbine system comprises at least one of a pressure sensor for sensing hydraulic pressure in a hydraulic cylinder for driving a valve...
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4464720 |
Centrifugal compressor surge control system
A surge control system is disclosed for centrifugal compressors which utilizes an algorithm to calculate a desired orifice differential pressure and compare the calculated result with an actual...
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4445180 |
Plant unit master control for fossil fired boiler implemented with a digital computer
An electric power plant, including a fossil fired boiler and a steam turbine, is operated by a control system including a plant unit master. The control system includes a boiler control for...
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4404637 |
Process control system
A variable limit is utilized to prevent a position controller which requires a velocity set point signal from overdriving a stuck control valve. Control based on a comparison of the actual position...
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4368520 |
Steam turbine generator control system
A turbine control system which includes dual controllers having microcomputer processing circuits and capable of transmitting and receiving digital information to and from a plurality of valve...
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4360882 |
Process control system
In a process in which both a turbine or motor and an expander are utilized to drive a compressor, the use of the expander is substantially maximized while still insuring that the driving force...
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4319320 |
System and method for adaptive control of process
A system and method for the adaptive control of a process in which a feed forward control signal corresponding to a process demand is calculated according to a predetermined algebraic function,...
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4291378 |
Steam power plant and control element for the plant
A steam turbine plant is disclosed having at least one turbine intake valve and at least one by-pass valve, which valves are connected with a live-steam generator by way of a live-steam supply...
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4270055 |
System and method for transferring the operation of a turbine-power plant between single and sequential modes of turbine valve operation
A system and method of operating a turbine power plant utilizing a digital computer to transfer automatically between a single valve mode and sequential valve mode of operation and vice versa...
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4249088 |
Automatic device for synchronization of prime mover with electrical grid
A control circuit is disclosed for synchronizing a prime mover or electrical generator with an electrical grid or power line such that when the prime mover is connected to the grid; (a) the...
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4245162 |
Steam turbine power plant having improved testing method and system for turbine inlet valves associated with downstream inlet valves preferably having feedforward position managed control
A throttle valve test system for a large steam turbine functions in a turbine control system to provide throttle and governor valve test operations. The control system operates with a valve...
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4205380 |
System and method for operating a steam turbine with digital computer control with accelerating setpoint change
In a system and method for automatically starting, synchronizing and operating a steam turbine, control means for valve position limiting wherein such limit can be changed non-linearly. Means are...
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4120159 |
Steam turbine control system and method of controlling the ratio of steam flow between under full-arc admission mode and under partial-arc admission mode
In a steam turbine-generator with means for determining a load demand signal in accordance with a load reference signal, means for determining the valve opening under each admission mode of...
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4088875 |
Optimum sequential valve position indication system for turbine power plant
A system for indicating optimum positioning of steam inlet valves to minimize steam throttling losses during operation of a turbine power plant in the sequential valve mode is disclosed.
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4056331 |
Turbine control system
A turbine control system for changing over a throttle governing operation of a steam turbine to a nozzle governing operation thereof and vice versa by controlling control valves on the basis of a...
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4053745 |
Valve contingency detection system for a turbine power plant
A system for detecting the failure of steam inlet valves to respond properly to their respective control signals, is disclosed. The detection of such a contingency provides an appropriate...
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4037088 |
Wide load range system for transferring turbine or plant operation between computers in a multiple computer turbine and power plant control system
An electric power plant including a steam generator and a steam turbine is operated by a control system including two redundant digital computers. Switching circuitry is provided for coupling one...
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4028884 |
Control apparatus for controlling the operation of a gas turbine inlet guide vane assembly and heat recovery steam generator for a steam turbine employed in a combined cycle electric power generating plant
A combined cycle electric power generating plant includes gas and steam turbines and a heat recovery steam generator recovering the heat in the exhaust gases exited from the gas turbine and for...
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4029951 |
Turbine power plant automatic control system
A digital computer system for automatically controlling a turbine power plant without operator intervention is disclosed. The system controls the turbine from rolling off turning gear, through heat...
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4009567 |
Delayed ramping in the primary control system or local maintenance controller of a gas turbine implemented electrical power plant
A predetermined time delay of speed setpoint ramping of a gas turbine is imposed at ignition in its primary control system or local maintenance controller in order to compensate for the fixed...
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4007595 |
Dual turbine power plant and a reheat steam bypass flow control system for use therein
An electric power plant having dual turbine-generators connected to a steam source that includes a high temperature gas cooled nuclear reactor. Each turbine comprises a high pressure portion...
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4007596 |
Dual turbine power plant and method of operating such plant, especially one having an HTGR steam supply
A power plant including dual steam turbine-generators connected to pass superheat and reheat steam from a steam generator which derives heat from the coolant gas of a high temperature gas-cooled...
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4005581 |
Method and apparatus for controlling a steam turbine
An electric power plant steam turbine system with digital computer control in which control signals are generated as a function of the actual steam conditions present in each turbine section and in...
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3931503 |
System for operating a boiling water reactor steam turbine power plant utilizing dual analog throttle pressure controllers
A combined digital computer/analog control system for operating a boiling water reactor-steam turbine-power plant wherein one of two analog throttle pressure controllers is used for controlling the...
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3709626 |
DIGITAL ANALOG ELECTROHYDRAULIC TURBINE CONTROL SYSTEM
An electrohydraulic control system for a steam turbine has steam valve actuators with analog valve position set points or reference values supplied by a main control loop with a digital computer....
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3552872 |
Title is not available
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