64results about How to "Accurate control signal" patented technology

A method is provided for controlling the operation of a wind turbine includes (a) receiving an active power reference signal; (b) determining, based on the active power reference signal and an active power feedback signal, a first voltage control signal and a power controller frequency signal; (c) receiving a power reference signal; (d) determining, based on the power reference signal and the power feedback signal, a power offset frequency signal; (e) determining, based on the power controller frequency signal, a second voltage control signal; (f) determining, based on the power offset frequency signal, an angle signal indicative for an actual angle of a rotating dq reference frame; and (g) controlling the operation of a power converter based on the first voltage control signal, the second voltage control signal, and the angle signal.

A hand-held pointing device for controlling a movement of a software cursor comprises an acceleration detector and an image capturing unit. The acceleration detector determines an inclination parameter, wherein the movement of the software cursor in a vertical direction is controllable based on the inclination parameter. Further, the image capturing unit records images within the visible spectral range, wherein the movement of the software cursor in a horizontal direction is controllable based on the recorded images.

In a pressure control system having a solenoid-operated fluid valve that has an output hydraulic pressure which varies in accordance with a solenoid input signal, a dynamic learning block is configured to adjust the initial, default values for control points stored in a pressure-current (P-I) data table based on observed (measured) operating points that reflect the solenoid's actual transfer characteristic. A feed forward control block is configured to generate the solenoid input signal having a level based on the adjusted control points in the data table, which improves the accuracy of the solenoid input signal. An adjustment method uses a plurality of circular buffers each configured to store observed operating points falling within a respective range, and provides a mechanism to allow adjustment of the control points based on only partial data.

A method of and apparatus for controlling the temperature of an inductively coupled or microwave induced plasma for optical emission spectrometry or mass spectrometry in which the intensities of two spectral lines of radiation emitted by the plasma are measured, and the power provided to sustain the plasma is adjusted so that the ratio of the intensities remains substantially constant.

The invention discloses a time-controlled single shaft tracking apparatus comprising a photovoltaic panel installation rack, a rotating shaft, a power-driven device, and a time-controlled device. The rotating shaft makes rotation and simultaneously drives the photovoltaic panel installation rack to make synchronous rotation as well as correspondingly adjusts a direction angle of a solar photovoltaic panel. The power-driven device drives the rotating shaft to make rotation once every 20 minutes, wherein an angle of the rotation of the rotating shaft that is driven every time is 5 degrees. And the time-controlled device controls the power-driven device according to a control mode that is arranged in advance and realizes that an included angle between an incident direction of the sunlight and a normal direction of the solar photovoltaic panel is always controlled to be less than 5 degrees in a day. Besides, the time-controlled device comprises a sunlight incident port, a photoelectric detector, a photoelectric detector window, a sunlight reflector and a controller. According to the invention, the apparatus has advantages of simple structure, reasonable design, simple operation, reliable performance and high operation precision. And moreover, defects that exist in a current photoinduction tracking system and include high cost, large power consumption, and small generated energy and the like as well as defects that exist at a fixed mounting type solar photovoltaic panel and include low generation efficiency and the like can be overcome.

The invention relates to methods, computer programs, devices, and encoders for signal error correction. A method (100) for signal error correction of a position signal relating to a relative positionof at least one sensor with respect to a reference, includes determining (S10) a set of parameter values of a parameterized approximation of a corrected relative position with respect to time based onmeasurements of the position signal over a duration of at least one period of a periodic signal error of the position signal. The method further includes estimating (S20) a first corrected relative position at a first time based on the parameterized approximation using the determined set of parameter values and the first time.

A method of and apparatus for controlling the temperature of an inductively coupled or microwave induced plasma for optical emission spectrometry or mass spectrometry in which the intensities of two spectral lines of radiation emitted by the plasma are measured, and the power provided to sustain the plasma is adjusted so that the ratio of the intensities remains substantially constant.

The present invention discloses a real-time responsive motor control system comprising a central MCU (Microcontroller Unit) core logic and at least one PWM (Pulse Width Modulation) MCU core logic. The central MCU core logic takes care of all interrupt events. The PWM (Pulse Width Modulation) MCU core logic is dedicated to the transformation of PWM signals so that the PWM signals output to a motor device are highly accurate. Further, the central MCU core logic may directly control the PWM MCU core logics so that the switching timing of the PWM signals is even more accurate. The present invention provides a modularized hardware architecture with flexible software control. The system design is simple and the associated cost is reduced.

A method is provided for controlling the operation of a wind turbine includes (a) receiving an active power reference signal; (b) determining, based on the active power reference signal and an active power feedback signal, a first voltage control signal and a power controller frequency signal; (c) receiving a power reference signal; (d) determining, based on the power reference signal and the power feedback signal, a power offset frequency signal; (e) determining, based on the power controller frequency signal, a second voltage control signal; (f) determining, based on the power offset frequency signal, an angle signal indicative for an actual angle of a rotating dq reference frame; and (g) controlling the operation of a power converter based on the first voltage control signal, the second voltage control signal, and the angle signal.

The present invention provides a method and system for processing an uplink control signaling feedback. The method comprises: a base station configuring a feedback mode of an uplink control signaling for user equipment, wherein the feedback mode is used for instructing the user equipment a manner in which to transmit the uplink control signaling on a physical uplink control channel (PUCCH) and / or a physical uplink shared channel (PUSCH); and the user equipment sending the uplink control signaling according to the feedback mode. By way of the present invention, it is ensured that the base station can correctly demodulate the uplink control signaling.

The invention provides a switching power supply and relates to the field of power supplies. The switching power supply comprises an input module, a transformation module, an output module and a control module. The input module comprises an input filtering circuit, a surging suppression circuit and an input rectifying circuit; the transformation module comprises a switching circuit and a transformer; the output module comprises an output rectifying circuit and an output filtering circuit; the control module comprises a power correcting circuit, a protection circuit, a sampling circuit, a reference power supply, a comparison and amplification circuit, a V / F circuit, an oscillator and a base electrode driving circuit.