68results about How to "Small time lag" patented technology

The present invention relates to a method of managing the consumption and distribution of electricity in a user facility, wherein the user facility is connected to an electricity supply grid and the user facility comprises a grid connected on site generator; the method comprising the steps of measuring waveform conditions on a portion of the electricity supply grid adjacent the user facility to obtain locally measured waveform conditions; measuring electrical power readings from the on site generator; communicating the locally measured waveform conditions and the electrical power readings to a controller in the user facility; determining, at least on the basis of the locally measured waveform conditions, whether the electricity supply grid is oversupplied or undersupplied with electricity; and, modifying the flow of the electricity within the user facility based on whether the electricity supply grid is oversupplied or undersupplied with electricity and/or the electrical power readings from the grid connected on site generator.

A camera includes an optical system, an image sensor, a white balance correction section, an original image processing section, a geometric setting section which sets a desired geometric transformation for the original picture signal, a geometry converter which generates a geometrically converted picture signal based on the geometric setting made by the geometric setting section, an edge component extractor, an edge signal generator, and an image synthesizer which synthesizes the geometrically converted picture signal and signal at the edges to generate a picture signal. The edge signal generator performs geometrical transformation of the edges of the image based on the geometric setting and is parameter-controlled based on a geometry parameter computed from a coefficient to emphasize edges for controlling the enhancement at the edges amount for the edges of the image and magnification to zoom an image calculated based on the geometric setting.

The invention provides an error data identification method applicable to secondary equipment of a power supply system. The method comprises the following steps: if difference between two adjacent sampling values of the secondary equipment is greater than a preset threshold, then the current data are the error data, and the error data are discarded. The theory is as follows: firstly, as primary equipment of the power supply system has large inductance and capacitance, in the case of serious fault of the power supply system, the current value or voltage value of the power supply system does not suddenly changes but changes according to an exponential function curve; secondly, a mutual inductor of the primary system and an internal mutual inductor of the secondary equipment which are used for signal transformation have a maximum range limit, so the sampling value of the second equipment has a maximum value; and thirdly, if the sampled signal has frequency, the sampled signal has the frequency characteristics. The threshold of the permissible maximum sampling value difference can be set by integrating the three steps with the specific characteristics of the secondary equipment, such as amplitude corresponding to sampling point number and sampling conversion of each cycle.

The invention discloses a traction motor on-line monitoring-based electric locomotive idling slippage identification method which comprises the steps of: taking electric parameters such as three-phase voltage of a traction motor, three-phase current of the traction motor and traction torque command as on-line monitoring parameters; then, acquiring the identification parameter related to an idling/slippage characteristic space by a multi-sampling rate expansion kalman filter method; meanwhile, using a data drive-based idling/slippage decision algorithm to obtain the judgment of idling/slippage trend by on-line data; and finally, based on the information, realizing the idling/slippage identification of a locomotive. The method has the beneficial effects that the electrical time constant of the traction motor transition process is far shorter than the mechanical time constant of the traction motor transition process, so that the time lag is greatly reduced, and the method can rapidly realize the locomotive idling/slippage identification so as to open up a space for optimizing an adhesion coefficient; and according to the method, d a speed sensor is not needed, thus saving the cost and improving the system reliability.

A transdermally absorbable preparation that even when a drug with poor solubility in a base is added in high concentration, is stable over time and can suppress crystallization of the drug, excelling in transdermal absorbability. There is provided a transdermally absorbable preparation, comprising a base and, added thereto, at least composite particles which are composed of a silicate compound and an organic acid and a drug.

An active anti-resonance vibration insulating device based on a digital controller is characterized in that the configuration is that one set of piezoelectricity acceleration sensor is provided on a vibration insulating platform. An actuator is provided between the vibration insulation platform and a base. The output end of the piezoelectricity acceleration sensor is connected with the digital controller. The output end of the digital controller is connected with the input end of the actuator which actuates under the controlling of the digital controller to apply force to the vibration insulating platform for generating a vibration insulating movement. The frequency of the movement is same with the frequency of the vibration from the base to the vibration insulating platform. The amplitude of the movement is same with the amplitude of the vibration from the base to the vibration insulating platform. The direction of the movement is opposite with that of the vibration from the base to the vibration insulating platform. The invention can simultaneously realize the anti-resonance vibration insulations of a plurality of frequencies.

{Problem}The exact method with small time-lag of detecting injection pressure for controlling pressure in an electric-motor driven injection molding machine without using a pressure detector has been asked for because the pressure detector is very expensive, necessitates troublesome works for mounting, an electric protection against noise and the works for zero-point and span adjustings and causes a complicate mechanical structure.

{Solution}The present invention uses a high-gain observer which contains the discrete-time arithmetic expressions derived from a mathematical model of an injection and pressure application mechanism in an electric-motor driven injection molding machine consisting of a state equation and an output equation and outputs an estimate of injection pressure, which is one of the state variables of the above state equation, by using an injection velocity signal and a servomotor current demand signal or actual motor current signal as inputs. The high-gain observer obtains the exact injection pressure estimate with very small time-lag without using a pressure detector. Thus the estimate of injection pressure fed by the high-gain observer can be adopted as a feedback signal of actual injection pressure for controlling injection pressure.

A driving tool of the invention includes a motor, a flywheel that is rotationally driven by the motor, an operating member that drives a material to be driven, an operating member actuation mechanism that selectively transmits a rotating force of the flywheel to the operating member and drives the operating member. The flywheel includes a driving-side member that is rotationally driven by the motor, a driven-side member that transmits a rotating force to the operating member, and a clutch member that connects the driving-side member and the driven-side member when the rotation speed of the motor is a predetermined speed or higher, while releasing the connection between the driving-side member and the driven-side member when the rotation speed of the motor is lower than the predetermined speed.

Disclosed are: a nutriculture system which enables the circulation of a nutrient solution while preventing the proliferation of pathogenic bacteria, and which can promote the growth of a plant effectively and steadily while preventing the change in components of the nutrient solution; and a water treatment apparatus for sterilization and purification purposes, which is compact in size. Specifically disclosed is a nutriculture system which can circulate a culture solution, which is a liquid fertilizer, between a nutrient solution tank and a cultivation bed. The nutriculture system is characterized in that a water treatment apparatus for sterilizing and purifying only the culture solution that flows through the cultivation bed is provided between the nutrient solution tank and the cultivation bed, wherein the water treatment apparatus comprises a unit having an ozone supply function for supplying ozone to the culture solution, an ultraviolet ray irradiation function for irradiating the culture solution with ultraviolet ray, and a photocatalyst-acting function for allowing a photocatalyst to act.

A power management system includes a plurality of power storages and a server. The server includes a selector that selects at least one of the plurality of power storages, a scheduler that makes a schedule for the selected power storage, and a request processor that requests a user of the selected power storage to control at least one of external charging and external power feed in accordance with the made schedule. The server obtains desire information that indicates a desire level (priority on battery life/priority on an incentive) and carries out at least one of selection of the power storage and making of the schedule based on the obtained desire information.

The invention relates to a discrete sliding mode control method of a piezoelectric drive deformation wing. The discrete sliding mode control method comprises the following steps: (a) establishing a coupling kinetic model of piezoelectric suppression wing flutter according to a Lagrange equation; and (b) according to discrete control, sliding mode control and the coupling dynamic model, obtaining adiscrete sliding mode control law of the piezoelectric drive deformation wing, and if the input voltage is carried out according to the control law, converting the wing into a stable state from a flutter state within limited time. Numerical simulation is carried out on discrete sliding mode control. The method has the most important characteristics that a novel piezoelectric actuator is adopted,the driving strain is better, and meanwhile, the wing surface of the wing can be actively controlled, so that the weight of the wing is reduced, and the reliability of the wing is improved. In addition, a discrete sliding mode controller is designed by adopting a discrete sliding mode control method, and wing bending-torsion coupling flutter is effectively inhibited.

The invention provides a real-time positioning method and device fusing laser radar and IMU sensor information, and the method comprises the steps: taking unscented Kalman filtering as a frame, carrying out the motion prediction of an unmanned platform through the data of a high-frequency inertial measurement unit, and caching the data; after the point cloud matching module receives the laser radar data with the timestamp, using the predicted pose as prior information, performing matching based on normal distribution transformation and a known point cloud map, and obtaining global positioning information with delay; using the positioning information for updating unscented Kalman filtering at the moment of the laser radar timestamp, calibrating the prediction error of the inertial measurement unit, and using the cached high-frequency inertial measurement unit data for performing re-prediction based on the positioning information, so that the low-delay and high-frequency positioning effect is realized. According to the method, high-frequency and low-delay real-time positioning can be realized, and a better control effect is brought.

The invention provides an air volume control system. The system comprises an activated sludge oxygen consumption respiration rate meter, an industrial computer, an electric gas flow regulating valve,an air flow meter and a blower; the activated sludge oxygen consumption respiration rate meter is arranged at the tail end of an anoxic tank, and detects an OUR value of the sewage entering an aeration tank in real time; the industrial computer converts the OUR value into a required gas volume, then a required gas volume signal is transmitted to a blower control cabinet to adjust the blower and output the required gas volume; a control system adjusts the air volume of each aeration branch pipe by adjusting the opening degree of the valve and makes the sum of the air volumes of the branch pipesequal to the total gas volume value. The control system can effectively shorten the time lag of a sewage biochemical treatment system, reduce the repeated periodic oscillation of the system, and prolong the service life of the system; the influence of external interference factors is effectively reduced, and stable running of the system is ensured.

The invention discloses a multi-objective robust control method for a high-speed railway pantograph type current collector based on state estimation. The multi-objective robust control method comprises the steps of: firstly, constructing a nonlinear pantograph type current collector-catenary model, and then constructing a control-oriented pantograph-catenary system model according to the nonlinearpantograph type current collector-catenary model to obtain a state-space equation under the pantograph-catenary system; secondly, determining a pantoraph active control target, and performing equation treatment on the control target; adding process noise and measured noise into the state-space equation according to the state-space equation under the pantograph-catenary system, so as to obtain anestimation-oriented discrete state equation; and finally, utilizing a space equation of the control target to design a multi-objective controller, and combining with an estimation result to obtain theoptimal active control force. The multi-objective robust control method studies the effectiveness and robustness of the control strategy in detail by means of the nonlinear pantograph-catenary model,and the control strategy still has good control performance under different operating conditions.

A pressure guiding tube blockage diagnosing device includes a receiving portion that receives pressure data from a pressure detecting portion, a feature quantity calculating portion that partitions a time series of pressure data, received by the receiving portion, into a plurality of intervals, and calculates, for each interval, a feature quantity indicating the state of fluctuation of a pressure, a change rate calculating portion that performs, for each interval, a smoothing process on the feature quantities over a specific time interval up to that interval, and calculates, from the feature quantities that have been subjected to the smoothing process, a change rate, for each interval, indicating the change of state of blockage of a pressure guiding tube therein, and an evaluating portion that evaluates the state of blockage of the pressure guiding tube based on the change rate calculated by the change rate calculating portion.

The invention discloses a self-powered rotary shaft vibration active control system and an active control method. In the self-powered rotary shaft vibration active control system, an inner housing isfixedly connected with a rotary shaft; a first end cover can be rotatably connected to the inner housing; a second end cover can be rotatably connected to the inner housing; the outer housing is fixedly connected to the first end cover and the second end cover; a permanent magnet is fixedly connected with the outer housing; a coil rack is fixedly mounted on the inner housing; a magnet exciting coil is wound on the coil rack, and generates relative motion with a permanent magnet to generate electric energy; an accelerated speed sensor is fixedly connected to the rotary shaft to measure a vibration signal of the rotary shaft in real time; an elastic element is fixedly connected to the rotary shaft; an actuator is fixedly connected to the elastic element, so that applied acting force acts onthe rotary shaft through the elastic element; the controller is electrically connected to the magnet exciting coil and the accelerated speed sensor; by responding to the vibration signal, the controller analyzes and processes the vibration signal to form a control signal; and by responding to the control signal, the actuator applies acting force on the rotary shaft through the elastic element to actively control radial vibration of the rotary shaft.

The invention relates to a lawn mower adopting an exhaust gas turbocharging auxiliary device. The device includes a gas outlet pipe sealed and communicated with a rear intake pipe and a gas introduction pipe sealed and communicated with an exhaust pipe. There is a flow control device sealingly connected between the adjacent ends of the tubes. The flow control device is controlled by the accelerator pedal on one side. When the accelerator pedal is released, the flow control device is suitable for introducing an appropriate amount of gas from the gas outlet pipe to the gas inlet pipe; loosen the accelerator pedal When pedaling, the compressed gas in the rear intake pipe is directly introduced into the exhaust pipe through the pipeline and the flow control device, and the flow control device adjusts the amount of gas introduced according to the speed of the accelerator pedal; The speed sends a proper amount of outside air into the front intake pipe; the power of the engine is immediately weakened with the relaxation of the accelerator pedal, reducing the time lag of the turbo.

The invention relates to a gear-driven device which is a resultant-force device taking a plurality of small motors as power sources. The gear-driven device comprises a motor, driving gears and a driven gear; the motor and the driving gears are matched closely and provide power for the gear-driven device; two or more driving gears are arranged at the periphery of the driven gear and meshed with the driven gear respectively; the driving gears rotate synchronously and concertedly, so that the driven gear rotates, and the driving gears act on the driven gear jointly so as to drive the driven gear; and the driven gear is used to transfer force to the outside of the gear-driven device. The gear-driven device is a good power-driven device and can be used for the equipment needing to be provided with power.