Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7920930 | Process for rapidly controlling a process variable without overshoot using a time domain polynomial feedback controller A method for controlling a process variable as it approaches a predetermined value (setpoint) so that the setpoint is not exceeded. The method employs a time domain polynomial equation in a feedback configuration and utilizes a controller that acts as an On/Off cont... | 04/05/2011 |
| 7599752 | Tuning methods for fractional-order controllers A method for tuning a fractional-order proportional-integral (PI) controller C ( s ) = ... | 10/06/2009 |
| 7454254 | Aircraft cabin pressure control system and method for reducing outflow valve actuator induced cabin pressure oscillations A cabin pressure control system and method that reduces or inhibits gear train backlash and the concomitant cabin pressure oscillations associated therewith. The cabin pressure control system includes a variable proportional-integral (PI) controller that implements ... | 11/18/2008 |
| 7432681 | Scanner system A scanner system includes a servo control unit. A rotation angle of a rotating shaft supporting a mirror is detected, and an error of the detected value with respect to a commanded value is integrated by an integral compensator so that the detected value is able to ... | 10/07/2008 |
| 7395125 | Method and controller for the adaptive control of at least one component of a technical plant The invention relates to a method in which at least one component of a technical plant is controlled by means of a PI controller. The actual value of the regulating parameter is continuously determined during operation of the plant and the amplification factor of th... | 07/01/2008 |
| 7395124 | Adaptive motor drive method and apparatus including inertia estimator A method and apparatus for use with a plant drive system that receives a reference command signal and generates a torque command to drive a plant, the method for estimating plant inertia and comprising the steps of providing a reference model that models the plant, ... | 07/01/2008 |
| 7331760 | Fan revolution speed control method Actual temperatures of intake air, hydraulic oil, and coolant, to be cooled by a cooling fan, are detected. Target fan revolution speeds are determined by PI control units based on differences between the actual temperatures and target temperatures. The cooling fan ... | 02/19/2008 |
| 7328075 | Method of automatic adjustment of the control parameters of a magnetic suspension system In adjustment of the control parameters of a magnetic suspension system, an object of the present invention is to provide a technique for adjusting the control parameters to optimum values automatically by employing the iterative feedback tuning method, without incr... | 02/05/2008 |
| 7315846 | Method and apparatus for optimizing a system model with gain constraints using a non-linear programming optimizer Method and apparatus for training a system model with gain constraints. A method is disclosed for training a steady-state model, the model having an input and an output and a mapping layer for mapping the input to the output through a stored representation of a syst... | 01/01/2008 |
| 7262978 | Voltage conversion apparatus, voltage conversion method, and computer-readable recording medium with program recorded thereon to allow computer to execute voltage conversion control A control device receives an output voltage of a voltage-up converter from a voltage sensor, and calculates a feedback preliminary voltage control value determined by the difference between a voltage control value and the output voltage. The control device corrects ... | 08/28/2007 |
| 7242989 | Apparatus and method for batch property estimation A method and apparatus that generates an estimate of a property of a batch process uses a non-parametric model to generate a plurality of rate of reaction estimates associated with the batch process. Each rate of reaction estimate may correspond, for example, to a p... | 07/10/2007 |
| 7222112 | Engine control system using a cascaded neural network A method, system and machine-readable storage medium for monitoring an engine using a cascaded neural network that includes a plurality of neural networks is disclosed. In operation, the method, system and machine-readable storage medium store data corresponding to ... | 05/22/2007 |
| 7187990 | Process controlling method with merged two-control loops The architecture of the controller of the present invention is mainly composed of three portions, which are a model predictive controller, a local controller (also called stably assistant controller), and a coordinator. This modified model predictive control structu... | 03/06/2007 |
| 7181321 | Method and device for operating a multiple component technical system, particularly a combustion system for producing electrical energy In a technical system a plurality of values associated respectively with a component are stored in at least one computer unit. The computer unit is enabled to trigger an evaluation of at least one other component with a value when a component begins or terminates op... | 02/20/2007 |
| 7177710 | System and method for adaptive control of uncertain nonlinear processes A computer system for controlling a nonlinear physical process. The computer system comprises a linear controller and a neural network. The linear controller receives a command signal for control of the nonlinear physical process and a measured output signal from th... | 02/13/2007 |
| 7164953 | Speed control device In a speed control system, there are provided a speed observer compensator (10) for inputting a difference between a speed VM of a mechanical system (5) and an estimated value VMO of a speed of the mechanical system (5) whi... | 01/16/2007 |
| 7159513 | Offset printing machine The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders in a printing unit, for example, are driven respectively by separate electric motors and are no... | 01/09/2007 |
| 7155897 | Combustion temperature high speed detection device A combustion temperature high speed detection device is provided with a phase lead processing portion, thereby canceling out a detection lag of a temperature detector, and detecting the combustion gas temperature of a combustor at a high speed. The combustion temper... | 01/02/2007 |
| 7109608 | Advanced smooth transition switch A bi-directional smooth transition switch with bumpless transfer is disclosed. It is composed of two feedback loops, each with feedback and forward-loop compensators. During loop operation, one feedback loop is active, while the other is inactive. The smooth transit... | 09/19/2006 |
| 7107108 | Controller and method of controlling an apparatus using predictive filters In the field of electronic or computerised control apparatuses, known methods of compensating for disturbance signals rely on less than ideal analytical or empirical models. There is provided a controller (200) or method of controlling which observes and lear... | 09/12/2006 |
| 7096093 | Intelligent valve flow linearization A feed-forward flow controller is designed to calculate a target valve position from a target flow. Correction is made for liquid or gas pressure drop across the valve and for the valve flow modulating member geometry. This feed-forward action may also be used to li... | 08/22/2006 |
| 7085611 | Control method of PI controller A control method of a PI controller which selectively performs a proportional control and a proportional/integral control, the method includes Fourier transforming an output of the PI controller, calculating a spectral energy ratio of the transformed output of the P... | 08/01/2006 |
| 7054846 | Temporally discrete dynamic fuzzy logic control elements A control unit has at least one control element, in particular with at least one integrating and/or differentiating transfer characteristic which is constructed as a temporally discrete dynamic fuzzy logic control element. A temporally discrete dynamic fuzzy logic c... | 05/30/2006 |
| 7044046 | Hydraulic servo-assisted steering system for vehicles and a controlling method for a steering system of this type For a hydraulic servo-assisted steering system for motor vehicles, classifying storage of the respectively measured, actual valve characteristic curves is provided and, corresponding to this, energization characteristic curves for the magnetic actuator of the conver... | 05/16/2006 |
| 7035695 | Method and apparatus for tuning a PID controller In tuning a controller for a process in a feedback control system, a method is provided for bringing the system into asymmetric self-excited oscillations for measuring the frequency of the oscillations, average over the period value of the process output signal and ... | 04/25/2006 |
| 7016743 | Model-free adaptive control of quality variables A Model-Free Adaptive Quality Variable control system is disclosed for effectively controlling quality variables on-line in closed-loop fashion. It is able to automatically control quality variables under the conditions where there are significant varying time delay... | 03/21/2006 |
| 6970750 | Model-free adaptation of a process controller An adaptive process controller drives a process variable to be substantially equivalent to a set point and adapts the controller gain, the controller reset, and/or the controller rate, based on model free adaptation. The adaptive controller combines a controller gai... | 11/29/2005 |
| 6968258 | Residual feedback to improve estimator prediction A system and method 100 of using residual feedback in a control loop in a manner that substantially eliminates the steady state error in the predicted states that results from the mismatch in gain between the plant and the model. The control effort used by th... | 11/22/2005 |
| 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 |
| 6937908 | Method for tuning PID controllers applicable to nonlinear systems A method for tuning a PID controller includes the steps of inducing equivalent relationships between PID gains of the PID controller and parameters of time delay control (TDC), selecting a natural frequency vector and a damping ratio vector so as to acquire a desire... | 08/30/2005 |
| 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 |
| 6825631 | Prediction controlling device A controlling device of high follow-up accuracy is provided, the prediction accuracy of which is not degraded by an FF signal when the controlled object is feedforward-controlled. The prediction controlling device 1 has a feedforward signal generation command... | 11/30/2004 |
| 6751510 | Predictive and self-tuning PI control apparatus for expanded process control applications A predictive and self-tuning PI controller includes an apparatus for variably assigning gains thereto in accordance with specified time functions following a change in set-point. The control gains are computed in accordance with a plurality of input parameters and s... | 06/15/2004 |
| 6735483 | Method and apparatus for controlling a non-linear mill A method and apparatus for controlling a non-linear mill. A linear controller is provided having a linear gain k that is operable to receive inputs representing measured variables of the plant and predict on an output of the linear controller predicted control value... | 05/11/2004 |
| 6725100 | Automatic load adjustment The subject of the invention is a process for adjusting a processing unit, whereby at least one set value is varied from a starting value to a final value. In this case, the target value of a correcting value is set based on the starting value and the final value of... | 04/20/2004 |
| 6716359 | Enhanced time-based proportional control The instant invention is a device and method for its use which includes the addition of a deviation compensation function effective to automatically adjust the offset used in time-based proportional control. Inclusion of this improvement finds particular utility in ... | 04/06/2004 |
| 6718277 | Atmospheric control within a building A method and system for controlling atmospheric conditions within a building. A conditioned fluid is supplied inside of the building and one or more atmospheric parameters in various locations inside of the building are sensed. An empirical atmospheric map is then g... | 04/06/2004 |
| 6687553 | Dual gain variable control system A method for controlling a solenoid using a single coil solenoid for both course and fine adjustment. A resistor or series of resistors may be used in parallel/for current controlled solenoids or in series for voltage controlled solenoids for allowing cou... | 02/03/2004 |
| 6684112 | Robust model-free adaptive control A Robust Model-Free Adaptive controller is disclosed for effectively controlling simple to complex systems including industrial processes, equipment, facilities, devices, engines, robots, vehicles, and appliances. Without the need of re-designing a contro... | 01/27/2004 |
| 6675073 | System and method for tuning the weight control of a flow of material The present invention includes a system and method for fine tuning the process of controlling the weight of a flow of material, such as a rod of material in a production facility. A control actuator in communication with a PID controller and PID control l... | 01/06/2004 |
