364results about How to "Strong control ability" patented technology

The invention relates to a gyroplane and further relates to a variable-torque four-rotor aircraft with large load capacity. The variable-torque four-rotor aircraft with large load capacity contains a fuselage, four rotor arms which are connected with the fuselage and are symmetrically distributed, and rotors positioned on the rotor arms. Among the four rotors, two adjacent rotors rotate in opposite directions. The included angle of each rotor blade 1201 to the water level can be adjustable, thus making the lift force adjustable and further adjusting the attitude of the aircraft. According to the invention, operationality of the aircraft is substantially raised.

The present invention is directed to an apparatus and method for venting trapped air and gasses in a mold. The mold and method comprise or use at least one pin formed from multiple pin sections. When assembled, the pin sections provide space on the interior of the pin through which trapped air and gasses can escape from the mold. The present invention may also be used to assist in ejecting an object from the mold. The pins can have circular or non-circular cross-sections and also may have dimple-forming projections to conform to a golf ball dimple pattern.

A system for pumping blood to assist or assume the cardiac function of a patient is characterized by a blood pump that exhibits a steep performance curve such that only small changes in pump flow occur for large changes in differential pressure across the pump. The pump therefore exhibits flow-limiting characteristics to protect the physiological system against harmful flow rates or pressures. Pump flow may also be limited by controlling the current provided to a driver from a power supply or by suitable restrictions within or external to the pump housing.

The invention relates to the research field of a microgravity simulating platform of a space robot, in particular to a microgravity air floatation target satellite simulator system with five degrees of freedom. The system consists of three parts, namely a movement simulator, a satellite simulator and a ground control panel. The movement simulator simulates the states of zero gravity, low friction and micro interference of a base satellite; the satellite simulator has a basic single-shaft attitude adjustment and track control function under a condition that a satellite provided by the movement simulator is in a track movement simulating environment, comprises a sensor, a controller and an actuating mechanism (a counteractive flywheel and a cold gas injecting system), and is provided with auxiliary systems such as a power system, a wireless communication assembly, a structural component and the like; and the ground control panel provides a basic function of the wireless data communication between a target satellite and the ground, and realizes the control on the target satellite and the receiving, storage and display of the data.

The invention discloses an alternating current induction motor control system based on a self-immunity to interference control. On basis of the prior art, according to ambiguity compensation, a known part, i.e., the ambiguity compensation sc of the rotation speed working characteristics of the alternating current induction motor is input to an expanded state observer, a sum action quantity Omega 3 of a variety of interference of an actual rotation speed Omega of the motor is an estimation of an unknown part instead of an overall rotation speed, thus burdens of the expanded state observer are relieved, meanwhile a variation scope of a parameter adapting object is enlarged, and the estimation precision of the expanded state observer is increased. By the adoption of the control system, better control effects compared with that of the alternating induction motor system based on the traditional self-immunity to interference control are obtained, the robustness and the immunity to interference are stronger, and the dynamic quality is improved.

A method for calculating a primary time constant of a power grid. It comprises the steps of: establishing an electromechanical transient model of the power grid using the widely used power system analysis software package (PSASP) according to the actual power grid parameters and network topology; establishing an electromagnetic transient model under PASAP using the actual power grid parameters for a site which requires the calculation of the primary time constant of the power grid, and setting a ground short circuit fault at the site; obtaining a transient short circuit current of the short circuit point of the power grid using a hybrid simulation method of the electromechanical and electromagnetic transient models; filtering out a periodic component in the transient short circuit current to obtain a non-periodic component attenuated with time, and finding the attenuation time constant of the non-periodic component which is the primary time constant of the power grid.

The invention discloses a design method of a double-free-form-surface lens for laser beam shaping and belongs to the technical field of non-imaging optics and laser beam shaping. An initial structure of the double-free-form-surface lens is set according to design requirements, the double-free-form-surface lens meeting lighting requirements is designed according to the relation of energy conservation, the refraction law and the optical path and with the assistance of a computer, and therefore after incident laser beams pass through the lens and are deflected, preset strength distribution and preset phase distribution are generated. The double-free-form-surface lens comprises double free-form surfaces, namely the front surface and the rear surface, and in addition, the front free-form surface and the rear free-form surface are obtained through surface fitting discrete data points. The invention further discloses the double-free-form-surface lens for laser beam shaping based on the method. A continuous free-form-surface form is obtained, the surfaces can be processed, regulating of strength distribution and phase distribution of the laser beams can be achieved at the same time, the control capability is strong, and the design efficiency is high.

The invention relates to the implantation field of broadband ion beams, and discloses a mass analyzing magnet for broadband ion beams. The mass analyzing magnet comprises a magnet and a coil connected with a power supply. The magnet comprises magnetic poles, a magnet yoke and magnetic shielding plates, the magnetic poles comprise an upper magnetic pole and a lower magnetic pole, the magnetic shielding plates comprise an upper magnetic shielding plate and a lower magnetic shielding plate, and a magnetic field space for the broadband ion beams to pass in a certain route is arranged between the upper magnetic pole and the lower magnetic pole. The invention further discloses an implanter system, which comprises an ion source, an extraction electrode unit, a deflection speed-reducing unit, a mass analyzing magnet, a target workpiece and workpiece transmitting unit, a beam flux measuring and diagnosing unit and a control unit. The invention has the beneficial effect of high quality resolution and nearly zero system aberration, and can generate pure broadband ion beams of 300mm, 450mm and even 1000mm, thereby improving the quality of ultra-low energy ion beams generated by a speed reducer and decreasing the angular dispersion of the ultra-low energy ion beams.

The invention relates to a double-fed wind driven generator system and a low-voltage through control method. According to the double-fed wind driven generator and the low-voltage through control method on the basis of a Crowbar circuit and a battery energy storage device, the low-voltage through capability can be effectively improved under the condition of large-range voltage drop, the double-fed wind driven generator system can be still kept to be connected with a power grid, and the stability of a wind power system is improved.

The invention discloses an integration platform of a Matlab (matrix laboratory) simulation model based on an HLA (high level architecture), which overcomes the disadvantages that the efficiency is low, the performance is poor and the like in the prior art. The integration platform of the Matlab simulation model based on the HLA disclosed by the invention comprises a simulation model module, a configuration file module, an HLA enabling module and an RTI (real time information) system. The configuration file module is used for filling SOM (simulation object model) information; and the HLA enabling module is used for realizing the interaction between the simulation model and the RTI system. The HLA enabling module comprises a simulation parameter configuration sub-module, an input sub-module, an output sub-module, a data space sub-module, an RTI service function sub-module and a callback service function sub-module. The invention discloses an integration method of the Matlab simulation model based on the HLA. According to the integration platform and the integration method of the Matlab simulation model based on the HLA disclosed by the invention, the integration of the HLA of the Matlab simulation model is realized, and the reusability of the simulation model is improved.

The invention discloses a lubricating oil composition for a turbocharging direct injection engine. The composition is prepared from, by weight, 75-85% of base oil, 7-12% of engine oil complexing agent, 4-12% of viscosity index improver, 0.3-1.0% of friction improver, 0.3-1.0% of high-temperature ashless antioxidant, 0.3-2% of rubber seal improver and 0.1-0.5% of pour point reducer. According to the lubricating oil composition, the content of calcium, phosphorus and molybdenum in finished lubricating oil is reasonably controlled, so that the obtained product has excellent high-temperature oxidation resistance and piston cleanliness, high grease controllability and remarkable anti-wear protective property; the occurrence rate of low-speed preignition of the turbocharging direct injection engine can be effectively reduced, the fuel economy of vehicles can be improved, and the service life of the engine can be prolonged.

The invention provides a disturbance generation device which is used for detecting the network access of a wind generating set and detecting and evaluating the grid-connected operation of a large-scale wind power station. The disturbance generation device generates various voltages for wind generator test, and comprises a low-frequency voltage disturbance device and a high-frequency voltage disturbance device, wherein the low-frequency voltage disturbance device is composed of a starting resistor, a reduction transformer, a filter, a parallel voltage source current converter module and a boosting transformer, and is used for realizing the function of low-frequency voltage disturbance; and the high-frequency voltage disturbance device is composed of a starting resistor, a rectifier transformer, a pulse-width modulation (PWM) rectifier module, a cascading H-bridge module and a filter, and is used for realizing the function of outputting second to twenty-fifth harmonic voltage, thereby realizing two-way flow of energy and meeting requirements of the wind generator for switching between a power-driven state or a power generation state.

The invention discloses a static switch and a control method applied to a connection of a microgrid and a public supply network. The static switch and the control method applied to the connection of the microgrid and the public supply network are characterized by comprising a main circuit and a controller, wherein the main circuit is placed between the public supply network and the microgrid, the controller controls the main circuit to turn on and turn off, and on-grid and off-grid of the microgrid are achieved through the power on and power off of the main circuit. Voltage, frequency and phase position of the public supply network and the microgrid and currents flowing past a bypass circuit are sampled by the controller to acquire a sampling signal, the power on or power off of the instruct main circuit are judged to achieve the on-grid and off-grid of the microgrid through calculation. According to the static switch and the control method applied to the connection of the microgrid and the public supply network, full automatic control on the smooth on-grid and off-grid of the microgrid is achieved, a micro source inverter of the microgrid can be monitored and controlled by the controller, and the purpose of energy management of the microgrid or assisting an upper level device to achieve energy management of the microgrid is achieved.

The invention provides an ultrasonic phased array detection imaging system, comprising a phased array ultrasonic probe, a transceiver circuit, a signal processing module, a main control module and a human-computer interaction module. The phased array ultrasonic probe is connected to the signal processing module through the transceiver circuit, the signal processing module is connected to the maincontrol module, and the main control module is connected to the human-computer interaction module. The signal processing module converts detection control information of the main control module into an electric pulse control signal, controls a transmitting circuit of the transceiver circuit, and then controls the ultrasonic array probe to excite a corresponding sound beam to an object to be inspected. The ultrasonic beam is reflected by the internal defect of the object, after a detection echo signal is detected by a receiving circuit, the collected detection echo signal is processed to obtaindetection echo data, and the detection echo data is transmitted back to the main control module. The system can flexibly adjust the scanning coverage by detecting the configuration of detection parameters, the defect parts are detected, and the detection speed and accuracy are ensured.

The invention discloses an adaptive fuzzy sliding mode RBF neural network control method for an active power filter. The control method is characterized by comprising the following steps of step 1, establishing an active power filter mathematic model; step 2, obtaining an adaptive fuzzy sliding mode RBF neural network controller based on fuzzy sliding mode design, including a fuzzy adaptive law and an RBF neural network adaptive law; and step 3, controlling the active power filter according to the adaptive fuzzy sliding mode RBF neural network controller. According to the control method, the command current can be tracked and compensated in real time; and in addition, the control method is high in reliability, high in parameter change robustness and high in stability.

A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse is generated to control the power converter. Another embodiment includes multiple thresholds that may be compared against the digital error signal.

The invention provides a multi-purpose mouse pen and discloses a mouse capable of adjusting an operation posture. The multi-purpose mouse pen comprises at least two plane displacement sensors, wherein a first plane displacement sensor is arranged at the straight plane of a housing of a mouse, and a second plane displacement sensor is arranged at the housing within the range of a small cone angle directed by +/-X axis or -Y axis at the center of the mouse, and is arranged at one end of the long axis of the mouse. The second plane displacement sensor is a key plate or is provided with a by-axis keyboard plate, wherein a key switch or a pressure sensor is arranged under the second plane displacement sensor. The first displacement sensor is equivalent to be a common mouse when used for detecting the displacement, a posture which is approximate to the pen holding posture can be provided when the first displacement sensor is used for detecting the displacement, the base function of an electric writing pen can be provided, and a track can be flexibly, quickly and exactly tracked by the flexible control of the wrist and the fingers. Furthermore, the control hand feel of the multi-purpose mouse pen, which is more conformable than that of the electric writing pen, can be provided, based on the wide volume and the loose key distribution.

The invention discloses a packet feedback scheduling method based on short-term fairness. The method quotes actual service amount obtained at various clients as feedback information, and weights wi' of the clients in a scheduler are adjusted by judging whether the clients obtain fair service; when the clients fail to reach the service amount specified by preset weights wi of the clients, the system correspondingly increases the weights wi' of the clients in the scheduler to compensate the bandwidth obtained by the allocation; and when the service amount obtained by the clients exceeds that specified by the preset weights wi, the system correspondingly reduces the weights wi' of the clients in the scheduler to reduce the bandwidth obtained by the allocation to implement the punishment. In the method, the weights of the clients in the scheduler can perform on-line adjustment according to the actual service amount obtained by the clients, which strengthens the robustness and the self-adaptability of the system, improves the ability of the system to realize the short-term fairness at the same time, and provides more fair QoS for the clients.

The invention discloses a quick-response direct force generating device. A power supply system (1) comprises a high-voltage pulse circuit (11), a high-voltage direct-current circuit (12) and a charging and discharging capacitor (13). A spark discharge plasma synthetic jet actuator (2) of the device comprises an actuator body (24) provided with a cover plate (26), and a main discharge electrode (21), an ignition positive electrode (22) and an ignition negative electrode (23) which are inserted in the actuator body (24) at intervals. A jet outlet (25) is opened in the cover plate (26). The main discharge electrode (21) is connected with the high-voltage direct-current circuit (12), and the ignition positive electrode (22) and the ignition negative electrode (23) are connected in parallel with the high-voltage pulse circuit (11). According to the device, the pulse jet frequency and the jet energy can be adjusted according to needs, a novel generating mode is provided for controlling quick-response direct force of a high-speed air vehicle, and the device can be used an actuator in active flow control in high-speed internal and external flow fields.

The invention discloses isaria fumosorosea wettable powder as well as a preparation method and an application thereof. The isaria fumosorosea wettable powder comprises the following components by mass percent: 5%-20% of isaria fumosorosea conidiophore powder, 3%-5% of wetting agent, 3%-5% of dispersing agent, 0.1%-0.5% of ultraviolet protective agent, and the balance of carrier. The isaria fumosorosea is an isaria fumosorosea strain SCAU-IFCF02 which is preserved in China Center for Type Culture Collection on November 1, 2013 with the preservation number CCTCCNO: M2013526. The isaria fumosorosea wettable powder is mainly used for preventing and treating brassicaceous vegetable pests, has good effect in preventing and treating pests such as plutella xylostella and the like, and has the advantages of high insecticidal activity, stable effect, lasting effect, small impact on environment, and convenience in use.

The invention discloses a laser cladding device and method based on ultrasonic-Lorentz force composite vibration, which solves the problems of insufficient vibration capacity and many bubbles in the cladding layer in the prior art, and achieves effective cladding layer cracks , The effect of suppressing and reducing air bubbles, the scheme is as follows: the clamping chuck is used to support the cladding substrate; the first conductive head is set opposite to the clamping chuck, and is used to apply a current field to the cladding substrate from the end ; The second conductive head is set on the machine bed, and is used to apply a current field to the cladding substrate from below; the laser head is set on the top of the machine bed, and is used to cladding the cladding substrate from above; The coil includes two magnetically conductive cores, which are respectively arranged on both sides of the laser head, and each magnetically conductive core is wound with a helical coil; an angle adjustment mechanism for an ultrasonic generator; the ultrasonic generator is supported by an angle adjustment mechanism for an ultrasonic generator , which is used to apply an ultrasonic field to the cladding substrate at a set angle.