5116 results about "PID controller" patented technology

Controls for an optical scanner, such as a single fiber scanning endoscope (SFSE) that includes a resonating optical fiber and a single photodetector to produce large field of view, high-resolution images. A nonlinear control scheme with feedback linearization is employed in one type of control to accurately produce a desired scan. Open loop and closed loops controllers are applied to the nonlinear optical scanner of the SFSE. A closed loop control (no model) uses either phase locked loop and PID controllers, or a dual-phase lock-in amplifier and two PIDs for each axis controlled. Other forms of the control that employ a model use a frequency space tracking control, an error space tracking control, feedback linearizing controls, an adaptive control, and a sliding mode control.

An unmanned air vehicle is provided, which includes an airframe and a parallel hybrid-electric propulsion system mounted on the airframe. The parallel hybrid-electric propulsion system includes an internal combustion engine and an electric motor. A hybrid controller is configured to control both the internal combustion engine and the electric motor. A propeller is connected to a mechanical link. The mechanical link couples the internal combustion engine and the electric motor to the propeller to drive the propeller. An alternate unmanned air vehicle includes a second propeller driven by the electric motor. In this alternate unmanned air vehicle, the internal combustion engine is decoupled from the electric motor.

A decentralized load management and control system and method are provided herein. A plurality of loads in a system are associated with a multitude of respective networked load controllers. If energy demand exceeds optimum limits in operation then the networked load controllers collaborate to determine which load(s) will be shed based on an optimization algorithm that considers, inter alia, variable load priority and business objectives. Additionally and/or alternatively, if the metered energy demand is less than optimum, the load controllers can determine which loads to reconnect again based at least upon load priority and business objectives.

A networkable power controller includes a mode selector for selectively conducting of a plurality of input signals to an output of the networkable power controller, where the input signals and the output signals satisfy the same signaling protocol. The networkable power controller may be networked with other networkable power controllers, lighting ballasts and other building automation control devices, and user-controlled voltage selectors to provide a lighting control network. A power controller may include a mode selector that may be used in combination with other control devices or components, including a rotary dimmer control, a digital slide dimmer control, a demand load shedder component, a photometer component, and a communications interface. The communications interface allows digital control of the networkable power controller.

An intelligent gain controller operates to control the gain in each one of wideband uplink and downlink signal paths. Weak desired signals, within each wideband signal path, are detected using a narrowband down converter and detector, and these desired signals monitored by the micro controller. Based on the monitored signals, the micro controller operates, under control of suitable software implementing an Adaptive Control Algorithm, to adjust the gain in each of the uplink and downlink paths in order to dynamically optimize performance.

A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle, modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period.

A method is provided in one example embodiment and includes receiving a message associated with a detection of reactive power in an energy system and inducing a first quantity of reactive power at a power level specified in the message. The first quantity of reactive power is induced in order to mitigate a second quantity of reactive power that is detected on a specific segment of the energy system. The first quantity of reactive power is induced at a local level on which a source associated with the second quantity of reactive power operates. In more specific embodiments, the message is sent in response to a sensor detecting the second quantity of reactive power, where the first quantity and the second quantity of reactive power are the same. In other embodiments, the method can include receiving a second message to stop mitigating the first quantity of reactive power.

Devices and methods of detecting a predetermined audio signal in audio signals are provided. A device includes a processor coupled to a clock signal generator, a power controller and an audio detector. The power controller controls a clock rate provided to the processor by the clock signal generator, to control the device to operate in a low power mode having a relatively low power consumption or in a normal power mode having a relatively high power consumption. The audio detector receives audio signals and detects, in the low power mode, probable presence of a predetermined audio signal in the audio signals. The power controller controls the device to switch from the low power mode to the normal power mode responsive to the detected presence of the predetermined audio signal by the audio detector.

A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.

A state based adaptive PID controller includes a model set component including a plurality of process models, each process model including a plurality of parameters. An error generator generates a model error signal representative of a difference between a model output signal and a process output signal. A model evaluation component computes a model squared error based on the model error signal. A parameter interpolator calculates an adaptive parameter value based on the model squared error. A controller update component updates adaptive controller parameter values based on adaptive parameter values.

The invention provides a double-hub electronic motor electrical differential and speed regulation integrated controller. A control signal integrated adjusting unit module, a right wheel speed signal preprocessing module, a right wheel pre-driving unit module, a left wheel pre-driving unit module, a left wheel speed signal preprocessing module, a left hub electrical motor controller, a right hub electrical motor controller, a driving module unit and a monolithic computer are arranged inside the double-hub electrical motor electronic differential and speed regulation integrated controller. The double-hub electrical motor electronic differential and speed regulation integrated controller is characterized in that an electronic differential mechanism, the left hub electrical motor controller and the right hub electrical motor controller are combined into a whole inside the double-hub electrical motor electronic differential and speed regulation integrated controller simultaneously, and all components inside the double-hub electrical motor electronic differential and speed regulation integrated controller are of module structures. Meanwhile, a control signal and speed feedback signal processing module needed by an electric vehicle is arranged inside the controller, pre-control circuits and terminal driving circuits of a left electrical motor and a right electrical motor are inserted in the controller, and thus the fact that a control assembly of the electric motor driven by a double-hub electrical motor has differential control in turning, speed control in driving, stop control in temporary stop and anti-theft control in parking is guaranteed.

A system (1) for transforming a variable output into an input having a desired speed value, including a transmission (30) receiving the output having a first speed (Ve) and producing the input having a second speed (Vgen), first, second and third sensors (12,10,7) producing data (39,32,37) corresponding to the first speed (Ve), second speed (Vgen) and a power demand (Pdem) for the input, a ratio set point controller (34), a ratio controller (36) and a speed controller (4). The ratio set point controller (34) receives the data (39,32,37) and calculates an available power (Pav), a stability level of the system (S,U1,U2), a desired value for the first speed (Ve), and a desired value and rate of change for the transmission ratio. The ratio controller (36) interfaces the ratio set point controller (34) and actuates the transmission (30) to change the transmission ratio to the desired value following the desired rate of change. The speed controller (4) changes the first speed (Ve) until the second speed (Vgen) corresponds to the desired speed value.

A method of creating and using an adaptive DMC type or other MPC controller includes using a model switching technique to periodically determine a process model, such as a parameterized process model, for a process loop on-line during operation of the process. The method then uses the process model to generate an MPC control model and creates and downloads an MPC controller algorithm to an MPC controller based on the new control model while the MPC controller is operating on-line. This technique, which is generally applicable to single-loop MPC controllers and is particularly useful in MPC controllers with a control horizon of one or two, enables an MPC controller to be adapted during the normal operation of the process, so as to change the process model on which the MPC controller is based to thereby account for process changes. The adaptive MPC controller is not computationally expensive and can therefore be easily implemented within a distributed controller of a process control system, while providing the same or in some cases better control than a PID controller, especially in dead time dominant process loops, and in process loops that are subject to process model mismatch within the process time to steady state.

Controller scaling and parameterization are. described. Techniques that can be improved by employing the scaling and parameterization include, but are not limited to, controller design, tuning and optimization. The scaling and parameterization methods described here apply to transfer function based controllers, including PID controllers. The parameterization methods also apply to state feedback and state observer based controllers, as well as linear active disturbance rejection (ADRC) controllers. Parameterization simplifies the use of ADRC. A discrete extended state observer (DESO) and a generalized extended state observer (GESO) are described. They improve the performance of the ESO and therefore ADRC. A tracking control algorithm is also described that improves the performance of the ADRC controller. A general algorithm is described for applying ADRC to multi-input multi-output systems. Several specific applications of the control systems and processes are disclosed.

A method and apparatus for controlling a self-refreshing display device coupled to a graphics controller are disclosed. A self-refreshing display device has a capability to drive the display based on video signals generated from a local frame buffer in the display device. A graphics controller coupled to the display device may optimally be placed in one or more power saving states when the display device is operating in a panel self-refresh mode. The graphics controller detects one or more progressive levels of idleness in the graphics controller and the pixel data stored in a frame buffer. Based on the detected idleness, the graphics controller signals the display device to enter or exit the panel self-refresh mode and enters a power saving state. When exiting the panel self-refresh mode, the display device and/or graphics controller ensure that the video signals generated by the local controller and the graphics controller are aligned.

The invention discloses a household information acquisition and user emotion recognition equipment, which comprises a shell, a power supply, a main controller, a microcontroller, multiple environmental sensors, a screen, a microphone, an audio, multiple health sensors, a pair of robot arms and a pair of cameras, wherein the microphone is arranged on the shell; the power supply, the main controller, the microcontroller, the environmental sensors, the audio and the pair of cameras are arranged symmetrically relative to the screen respectively on the left and right sides; the robot arms are arranged on the two sides of the shell; the main controller is in communication connection with the microcontroller, and is used for controlling the microcontroller to control the movements of the robot arms through motors of the robot arms; the power supply is connected with the main controller and the microcontroller, and is mainly used for providing energy for the main controller and the microcontroller. According to the household information acquisition and user emotion recognition equipment, the intelligent speech recognition technology, the speech synthesis technology and the facial expression recognition technology are integrated, thus the use of the household information acquisition and user emotion recognition equipment is more convenient, and the feedback is more reasonable.

Described and illustrated is a diabetes management system that includes an infusion pump, glucose sensor and controller with a method programmed into the controller. The infusion pump is configured to deliver insulin to a subject. The glucose sensor is configured to sense glucose levels in the subject and provide output signals representative of the glucose levels in the subject. The controller is programmed to receive signals from at least one of the glucose sensor and the pump and configured to issue signals to the pump to deliver an amount of insulin determined by a feedback controller that utilizes a model predictive control and also configured to deliver at least the basal amount of insulin whenever the subject has initiated a manual bolus of insulin and a sensed or measured glucose level is at least a first threshold within a first duration of time.

A controller for determining the duty-ratio for a pulse width modulator of a converter includes an inner current loop, an outer voltage loop and a multiplier with an input voltage feed forward to connect both loops. A prediction unit determines a correction signal i_cor that is added to the reference current i_ref by means of an adder and it further determines a sample correction signal to correct the current samples in the current loop. This error-controlled duty-ratio prediction with sample correction results in an improved total harmonic distortion as well as in an improved power factor of the converter.

The invention discloses a continuous variable quantum key distribution system and a synchronous realization method thereof. The continuous quantum key distribution system consists of a light path part and a circuit control part, wherein the light path part mainly consists of a laser, an attenuator, a beam splitter, a polarization controller, am amplitude controller, a phase controller and a coupler. A control part is a transmission end controller module and consists of a true random key generator, an analog voltage output and a trigger clock output. The synchronous method comprises a bit synchronizing step and a frame synchronizing step. The invention provides a completely novel synchronous realization scheme based on properties of continuous variable quantum in an optical fiber, the practical orientation of the continuous variable quantum key distribution system is promoted, and the interference that the continuous variable quantum on the synchronous realization in the optical communication process also can be effectively overcome.

The invention relates to an intelligent insomnia therapeutic instrument, aiming at providing a therapeutic instrument which can induce and regulate potential action of the sleep center of a patient so as to accelerate the falling asleep speed of the patient and improve the sleep quality or realize a natural timing awaking function. The technical proposal is as follows: the instrument comprises a signal output module generating time varying magnetic fields, a bipolar electrode brain wave acquiring module acquiring real-time brain waves of the patient and a main controller obtaining the brain waves and carrying out down-conversion or up-conversion, wherein the signal output module converts digital brain signals output by the main controller into analogue signals which are amplified so as to drive a magnetic field generator to generate time varying magnetic fields used for treating.