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| Number | Title | Issue Date |
| 8145328 | Detection and quantification of stiction An effective non-intrusive data-based monitoring method may reduce the cost of control loop performance maintenance by screening and short-listing those control loops or valves that need maintenance. The invention comprises a data-based, model-free, non-invasive met... | 03/27/2012 |
| 7111178 | Method and apparatus for adjusting the voltage and frequency to minimize power dissipation in a multiprocessor system A method for adjusting the voltage and frequency to minimize power dissipation in a processor. The method of one embodiment comprises determining a power consumption value. The power consumption value is evaluated to obtain a new operating point. The new operating p... | 09/19/2006 |
| 7107120 | Apparatus and method for controlling inter-process buffer, and program and storage medium realizing the same An object of the invention is to minimize the number of in-process items. To this end, in an inter-process buffer controlling apparatus according to the invention, the size of a buffer to be used for storage of work subjects of predetermined work is increased if a d... | 09/12/2006 |
| 6937909 | Pattern recognition adaptive controller A pattern recognition adaptive controller configured to dynamically adjust proportional gain and integral time control parameters based upon patterns that characterize the closed-loop response. The pattern recognition adaptive controller receives a sampled signal re... | 08/30/2005 |
| 6918356 | Method and apparatus for optimizing a steam boiler system A method for controlling a steam boiler or oil heater for maximum fuel efficiency by systematically finding the most fuel-efficient combination of input control values. A characteristic multi-dimensional look-up table is created by temporarily operating the process ... | 07/19/2005 |
| 6912426 | Method for determining time constants of a reference model in a cascade controlling circuit A method for determining at least one time constant of a reference model, which is designed as a 2nd order time-delay element of a machine. The method includes detecting an oscillation frequency of an undamped machine oscillation and determining an optimized value o... | 06/28/2005 |
| 6889551 | Method of estimating timber stiffness profiles The invention relates to methods and apparatus for estimating stiffness or elasticity profiles across timber. This involves measuring a velocity of a plane compression wave propagating in the timber, determining density information relating to the timber and estimat... | 05/10/2005 |
| 6885933 | Signal correcting device An arrangement for correcting a signal (S) is suggested which contains a signal evaluation (28), which determines a characteristic variable of the input signal (US) of a controller (26) and/or the actuating variable (fr) of the controller (26) a... | 04/26/2005 |
| 6704608 | Portable body used in two way, communication system, communication method, terminal, computer-readable recorded medium on which program is recorded An IC card 1 (portable card) having an integrated device. The IC card 1 includes a nonvolatile memory 12 and an encryption circuit 10. The nonvolatile memory 12 is accessed after the IC card 1 is placed in a radio wave zone to receive a power supply from ... | 03/09/2004 |
| 6216047 | Adaptive control method for cyclic signal An adaptive control method employs an adaptive signal generation algorithm 11 for generating an adaptive signal y(n) which cancels a cyclic signal y(n) at a measurement point 24, and an adaptive coefficient vector renewing algorithm 12 for renewing the am... | 04/10/2001 |
| 6112125 | Self-tuning method and apparatus for continuous-time filters A self-tuning technique for integrated continuous-time filters. The present invention provides a method and apparatus to compensate for post-fabrication or in-operation discrepancies between desired and measured filter characteristics due to variability o... | 08/29/2000 |
| 5909369 | Coordinating the states of a distributed finite state machine The states of a distributed finite state machine composed of a plurality of devices are coordinated by a sequence of operations to effect a self-timed cycle. Each device is arranged to apply a voltage over one or more leads and measure the current on the ... | 06/01/1999 |
| 5280424 | Oscillatory systems and methods of synthesizing same Methods of synthesizing stable oscillatory chemical systems from chemical systems having at least one output dynamically related to at least one input are provided. The output and input of the chemical system are selected such that a dynamic relation exis... | 01/18/1994 |
| 5184292 | Closed-loop control method and apparatus Method and apparatus for closed-loop control of a variable in which an analog manipulated signal is produced for discrete time intervals in response to an error signal. The effect of the manipulated signal is confined to a predetermined manipulating range... | 02/02/1993 |
| 5179513 | Process and apparatus for the control of a process variable when an indefinite measuring signal is encountered A system having a control variable, such as a proportion of a certain substance in a solution, maintains a set value of that control variable by obtaining a measuring signal as a function of the control value. That function is characterized by a curve hav... | 01/12/1993 |
| 4758943 | Method and an apparatus for automatically tuning a process regulator Method for adjusting the setting of a digital process regulator on the basis of the result obtained from a simple relay feedback experiment. When an adjustment of the regulator setting is to be made, the relay feedback is connected in the control feedback... | 07/19/1988 |
| 4674027 | Thermostat means adaptively controlling the amount of overshoot or undershoot of space temperature A microcomputer based clock operated thermostat is operated to adjust a ramprate of a setpoint temperature upon a setpoint change. The microcomputer in the thermostat is capable of determining the amount of overshoot or undershoot between the air temperat... | 06/16/1987 |
| 4578747 | Selective parametric self-calibrating control system A controlled system (10) has a control means (12) supplying a manipulated input, Y, to a plant (14). The control means (12) has external inputs V, input control model parameters C, and a predetermined mathematical model to compute a desired controlled sys... | 03/25/1986 |
| 4546425 | Procedure and device for optimation of the vibration amplitude in vibratory rollers A method is disclosed for providing optimal compaction of various materials by controlling the vibration amplitude of an adjustable amplitude vibratory roller. The vibration amplitude is automatically reduced when excessively high jolting forces are sense... | 10/08/1985 |
| 4257093 | Nominal adaptive control using most recent excursion in a property variation A method of automatically maintaining a nominal property value of a material near a limiting value in the process of making the material. The method involves the steps of imparting to the material a property that varies about the nominal value, and measur... | 03/17/1981 |
| 4167679 | Floating set point control circuit and method for use with electrical load control systems In an electrical load control system, an analog signal representing the actual rate of power being consumed by a plurality of loads has a nominal level when the actual rate is at a desired rate, or set point. As the level of the analog signal deviates fro... | 09/11/1979 |
| 4151588 | Method and apparatus for controlling one or several variables depending on several control inputs In order to control a variable of a control system depending on a plurality of control inputs to minimize an error function, one control input at a time is, at regular intervals, varied step by step in the same direction until the sign of the differential... | 04/24/1979 |
| 3984663 | Signal maximum or minimum seeking circuit In a feedback control circuit, a circuit maximizes or minimizes a controlled signal by incrementally varying the controlling signal in one sense, determining the direction of controlled signal change in response to such variation, and then incrementally v... | 10/05/1976 |
