60results about How to "Follow fast" patented technology

Disclosed are a model prediction control method and a model prediction control system for all working conditions of a wind generating set. The system comprises an MPC (model prediction control) device, a feedback information measurer, a wind wheel, a driving chain, a tower, a generating unit, a variable propeller driver and a converter. The feedback information measurer is used for detecting status variables of the wind wheel, the driving chain, the tower and the generating unit and transmitting detecting results to the MPC device, the MPC device is used for computing targets of the blade pitch angle and the generator torque, and the variable propeller driver and the converter are used for adjusting the blade pitch angle and the wind generator torque. The method is used for computing control increment by means of a variable propeller control prediction model and a torque control prediction model, takes the status variables including driving chain torsional displacement, driving chain torsional speed, blade plane external first-order flap displacement, blade plane external first-order flap speed, tower front-back first-order swing displacement, tower front-back first-order swing speed, mechanical loads of the unit and the like, and two prediction models can be automatically switched in different working conditions, so that the wind generating set can be operated in all working conditions.

An anti computer virus program uses a library of virus drivers that includes an indication of whether a particular virus can cause irreparable damage and data indicating enhanced user warnings and actions that might be associated with such viruses. If a detected computer virus is one that can cause irreparable damage, then an enhanced user warning (16) is issued indicating this to the user and a notification (28) of the possibility of such corruption is added into the repaired computer file. The notification may take the form of an electronically signed (30) banner message or the like.

The invention relates to the technical field of numerical control, in particular to a method for a digital closed-loop control capacitance raising system. In a capacitance acquisition amplifier, the output end of an inductance-capacitance (LC) resonance circuit is connected with the input end of a signal amplifying circuit; in a raiser main control board, the output end of a signal receiving circuit is sequentially connected with the signal input end of a field programmable gate array (FPGA) chip, one input end of a main control board core processor and the other signal end of a servo motor interface circuit; the other two signal ends of the main control board core processor are respectively connected with one end of a human-machine interface and one end of an Ethernet interface in a bidirectional mode; the output end of the signal amplifying circuit is connected with the input end of the signal receiving circuit; and the output end of a magneto-electric conversion circuit of the signal receiving circuit is connected with the signal input end of the FPGA chip. Compared with the prior art, the method has the advantages that: after board capacitance is converted into digital frequency signals, the digital frequency signals are transmitted and measured, so that the method is strong in anti-jamming capability, is not limited by the transmission distance and is high in measurement precision.

A defibrillator locating system and method enables would-be responders to quickly identify defibrillator location for effecting prompt defibrillation. The system may be said to comprise a number of spaced heart-shaped signal-transmitting devices, a signal-receiving/alarm device, and an automatic external defibrillator pair-positioned in visual proximity to the signal-receiving/alarm device. A responder may send a signal from any of the transmitter devices for activating the nearest receiving/alarm device, the latter of which activates an alarm signal for guiding the responder toward the automatic external defibrillator. The alarm signal is preferably auditory and has sufficient intensity whereby the responder may be able to aurally perceive the auditory signal and follow the same to the defibrillator site along an unobstructed pathway. The removably attached defibrillator enables the responder to quickly carry said defibrillator to a cardiac emergency site.

The invention relates to a five-phase asynchronous motor control strategy based on stator magnetic field orientation. Considering the characteristics of a five-phase asynchronous motor, the control strategy combines the advantages of vector control and direct torque control. Starting from the torque control effect, on the basis of voltage drop compensation of the stator resistance, the stator fluxlinkage is controlled by the stator straight axis potential. The purpose of controlling the torque is achieved by controlling the current torque component. The continuous control of the torque and the stator flux linkage is realized. The dependence of the system controller on the rotor parameters is avoided. A continuous control method is adopted to overcome torque ripple caused by hysteresis control. The control strategy provided by the invention is suitable for the fields of power electronics and power transmission.

The present invention is suitable for the unmanned aerial vehicle technology field, and provides an unmanned aerial vehicle height control method and system. A plurality of narrow beam single point measurement sensors are employed to perform distance measurement, and measurement results of a plurality of sensors are subjected to weight processing to allow the measurement results to be more accurate. In the calculation, the unmanned aerial vehicle height control method and system fuse the posture data of an unmanned aerial vehicle and perform dynamic posture measurement compensation processing of the measurement results. Compared to the prior art, the unmanned aerial vehicle can realize rapid following of the topography, keep the height and effectively avoid barriers above the unmanned aerial vehicle. The cost is low, the power consumption is small, the application scenes are various, flight effects are good, and the product viscosity is improved.

Sampling filling level in local jitter buffer area in adjustment cycle of jitter buffer area, and processing the sampled sequence obtains predicted value for reflecting change trend of filling level in local jitter buffer area in the adjustment cycle. Further, considering change information of jitter buffer area feedback from data sending end synthetically obtains best estimation of state of local jitter buffer area, based on which, the optimal state is adjusted. Comparing with prior art, the invention adjusts a buffer area to an optimal are quicker since considering information in local jitter buffer area and in jitter buffer area at sending end. The invention speeds up convergence of adjustment procedure.

An object of this invention is to provide an image sensing apparatus which shortens the photographing interval in single shooting and sequential shooting. To achieve this object, an image signal corresponding to an object image is read from an image sensing element to output image data by the processes of a signal processing circuit and A/D converter. An image processing circuit integrates the image data output from the image sensing element for white balance processing. An image display circuit performs processing of displaying on a display an object image during imaging on the image sensing element. A system controller so controls as to cause the image processing circuit to perform integral processing of the image data for the white balance during read of an image signal from the image sensing element, and cause the display to display the object image after integral processing ends.

A hydrogen storage apparatus includes a canister and at least one hydrogen storage unit. The canister has at least a hollow rod. The hydrogen storage unit is disposed in the canister. The hydrogen storage unit includes a housing, a heat-dissipating channel and a plurality of heat-dissipating partitions. The periphery of the housing is configured with a plurality of grooves, and each groove has a plurality of first holes. The heat-dissipating channel is located within the housing. Each heat-dissipating partition has a plurality of second holes and connects to the housing and heat-dissipating channel. The heat-dissipating partitions divide the space inside the housing. The first holes and the second holes connect to the inner space of the housing.

The invention discloses a method and an apparatus for establishing a social network dynamic relation graph. The method includes: obtaining user following information of each user in a social network and dynamic publishing information including publishing time information of each piece of news based on a graphic database; and establishing a dynamic relation graph according to the user following information and the dynamic publishing information of each user. According to the dynamic relation graph, each user is regarded as a user node, each piece of news is regarded as a dynamic node, each user node is connected with a dynamic relation chain and/or a user relation chain, the dynamic nodes are ranked according to the publishing time of each piece of news of the current user in the reverse order by the dynamic relation chain, and the user nodes are ranked according to the publishing time of the newest news of the followed user in the reverse order by the user relation chain. According to the method, the dynamic relation graph is accurately established according to data in the graphic database, the mutual relation between any users in the social network can be accurately indicated, and the following relation of the users and the change of dynamic expression brought by the relation can be rapidly responded.

The present invention provides a solar tracking apparatus for use with a power driving apparatus. The solar tracking apparatus includes: a memory unit for recording a first solar image; an image capturing unit for capturing a second solar image; and an processing unit for obtaining difference between the first solar image and the second solar image; wherein the processing unit activates the power driving apparatus in response to the difference. Furthermore, the present invention also provides a solar power generation system using the solar tracking apparatus. Besides the solar tracking apparatus, the solar power generation system also includes a solar panel; the power driving apparatus for adjusting the position of the solar panel, wherein the processing unit of the solar tracking apparatus activates the power driving apparatus based on the difference so that the solar panel is aligned with the sun to gather the solar energy of the sun.

The invention provides a stepless speed adjusting method and control system for the fan speed of wireless base station equipment. The adjustable resolution ratio of the fan speed is accurate to the inherently adjusted resolution ratio of the fan, and the fan speed adjustment is stepless. The primary fan speed is calculated by establishing a fan speed adjustment function via test data, and different weighted filtering methods are used to calculate the actual fan speed according to the fan speed variation trend. By using the stepless speed adjusting method and control system for the fan speed, no matter the adjustable resolution ratio of the fan speed is the fan speed adjustment function or stepless, the adjustment accuracy of the system can be improved, and an adjustment space is provided for system noise reduction. Weighed filtering is carried out on the actual fan speed according to the fan speed variation trend, quick following can be realized when the fan speed is increased, and slow following can be realized when the fan speed is reduced. Not only can the system satisfy the heat radiation requirement, but also power consumption is reduced.

The invention relates to an output controller for an engine control for an engine system comprising an internal combustion engine and in electric generator coupled to the internal combustion engine; a computer device which is designed to receive a mechanical target output for the engine system and a maximally permissible rotational speed for the generator and to calculate a target rotational speed for the electric generator and an output torque for the internal combustion engine on the basis of the target output and the maximally permissible rotational speed; an inertia compensating device which is designed to calculate a torque transmitted to a shaft of the generator by a mass moment of inertia of the internal combustion engine on the basis of a change of the target rotational speed for the electric generator and to calculate a target torque for the internal combustion engine on the basis of the transmitted torque and the calculated output torque of the internal combustion engine; and an efficiency calculating device which is designed to calculate a degree of efficiency of the engine system on the basis of the target rotational speed for the electric generator, the calculated output torque of the internal combustion engine, a battery voltage and a generator current of a battery of the engine system, and the calculated target torque for the internal combustion engine and to adapt the value for the mechanical target output, which is supplied to the first computer device, on the basis of the calculated degree of efficiency. The invention further relates to an engine controller and to an engine system.

The invention discloses an automatic follow-up control method and system based on infrared signal. The invention is provided with an asymmetrically distributed infrared receiving tube on the infraredreceiving module. The infrared signal from the infrared transmitting module is received through the asymmetrically distributed infrared receiving tube. According to the regional orientation of the received infrared signal, the main direction of the infrared receiving module is gradually aligned with the infrared transmitting module. At the same time, during the alignment process, the intensity ofthe infrared signal is gradually reduced to obtain the critical strength of the infrared signal transmitted to the receiving module. Therefore, the automatic follow-up control method and system basedon infrared signal can calculate the distance between the infrared transmitting module and the receiving module according to the intensity of the infrared signal, while performing high-precision fastdirection finding, and drive the infrared receiving module to achieve follow-up control. The automatic follow-up control method and system based on infrared signal can reduce the precision requirementof the infrared device by the cooperation of the hardware circuit and the control unit, and achieve high-precision direction finding and fast following under the premise of a small number of infraredreceiving modules, thereby reducing the hardware cost.

Provided is a voltage-current conversion circuit. The voltage-current conversion circuit comprises an initial voltage providing circuit and an OTA circuit. The initial voltage providing circuit is coupled between a feedback output end of the OTA circuit and a first NMOS tube of the OTA circuit, and is used to provide initial voltage for the feedback output end of the OTA circuit when the OTA circuit is started. The OTA circuit is used to amplify a preset supply voltage signal according to preset gain, so as to output a current signal which changes with a preset triangular wave signal on the basis of the initial voltage. The above scheme can make the OTA circuit in the voltage-current conversion circuit realize fast following on triangular wave signals.

The invention relates to a space floating type fast follow-up device, which comprises a floating disc, six swinging wheel groups, six horizontal traction ropes, six vertical traction ropes and a motive power device, wherein the floating disc is in a regular hexagon, the outer side of each side frame in three separated side frames of the regular hexagon is respectively provided with two swinging wheel groups, one horizontal traction rope is fixedly arranged on a horizontal support frame after passing through the respective swinging wheel group, the horizontal force is exerted on the floating disc, one end of the vertical traction rope is fixedly arranged at the focus point part of two side frames of the floating disc, the other end of the vertical traction rope is fixedly arranged on a vertical support frame, the vertical force is exerted on the floating disc, and the bottom of the floating disc is provided with the motive power device. The space floating type fast follow-up device is mainly used for the flight testing of the space aircrafts in the microgravity environment, in order to adapt to the flight action of a target aircraft, the device can be suspended in the air in a hanging mode, and in addition, certain horizontal stiffness is maintained, so the characteristic of high-speed flight of the target aircraft is met.

The invention relates to a method for improving the control accuracy of a rolling force of an HGC hydraulic cylinder of a temper mill. The method comprises the following steps: determining a pressure in the hydraulic cylinder; determining a pressure of an external pipeline; determining the internal-external pressure difference of the hydraulic cylinder; deducing the relationship between the opening degree of a servo valve of the HGC cylinder, and the pressure according to the determined internal-external pressure difference of the hydraulic cylinder; and controlling the opening degree of the servo valve according to the obtained relationship. According to the invention, control for stability of a flow rate is ensured, the fluctuation of the rolling force of the temper mill can be reduced, and the accuracy of the rolling force is increased, thus the surface quality of steel strips is improved.

In the tape winder for winding a tape on a reel to form a tape roll, a nozzle which blows a gas toward an outer peripheral surface of the tape roll at a winding time of the tape is fixed on a slider, which is slidably supported on a rail. In this way, the nozzle is supported movably forward and backward with respect to the tape roll. Moreover, the nozzle is pressed toward the tape roll by an air cylinder with a constant pressing force. Thus, the nozzle is allowed to accurately follow an outer peripheral surface of the tape roll, and a constant pressure can be applied to the outer peripheral surface of the tape roll. Consequently, the tape can be wound with an adequate winding tightness.