60results about How to "Does not affect control" patented technology

The invention specifically relates to a method and a device for distinguishing a double-three-phase motor parameter on line on a harmonic plane, and belongs to the field of mechanical and electrical technology. The method provided by the invention comprises the following steps of carrying out coordinate transformation on collected phase current in a motor vector control system to obtain the feedback current of a fundamental wave plane and a harmonic plane; according to the feedback current of the fundamental wave plane, calculating the reference voltage of the fundamental wave plane and the reference current of the harmonic plane; according to the error of the reference current and the feedback current of the harmonic plane, calculating stator resistance, stator leakage inductance and the reference voltage of the harmonic plane; according to the reference voltage of the fundamental wave plane and the harmonic plane, calculating the reference voltage of two sets of windings, i.e. ABC and UVW; and finally, according to a three-phase PWM (pulse-width modulation) strategy, calculating the conduction state and time of an inverter switching tube, and driving the motor to operate. The invention has the advantages of high distinguishing accuracy, quickness in convergence, simple algorithm and device and easiness in realizing, and a distinguishing result does not depend on other motor parameters.

The invention discloses a motor servo system additivity fault detection and fault tolerant control method based on a slip form. The method includes building a motor servo system mathematical model containing additivity fault description, designing a slip form disturbance observer to observe additivity fault level and demonstrate observation accuracy, designing an initiative fault tolerant controller according to the observed additivity fault, and demonstrating system overall gradual stability according to the Lyapunov nonlinear stability principle. By means of the control method, the reasonable fault tolerance degree can be set to ensure that effects caused by various model uncertainties are kept in the designed fault tolerance range all the time when the system has no fault, false alarming of the system is avoided, and fault detection robustness is improved. The additivity fault level of the system can be observed on line, real-time performance of additivity fault detection is guaranteed while system control performance is not affected, active detection missing and fault tolerant control of minor faults can be achieved, and timely warning of severe faults is also achieved.

The invention belongs to the technical field of digital micro-fluidics, and in particular relates to a liquid drop mixing unit based on an electro-wetting digital micro-fluid chip. The mixing unit comprises three parts consisting of an inlet zone, a mixing zone and an outlet zone; the fast, high-efficiency, automatic and reliable mixing of the liquid drops can be realized via the special bidirectional driving electrode and closed-loop electrode arrangement and simplified electrode connection mode. The liquid drop mixing unit has the advantages of novel design, easiness in control, high reliability, excellent practicability, high automation degree, and the like, so that the liquid drop mixing unit can be widely used in various digital micro-fluid chips.

The invention discloses a three-redundancy server controller achieving power amplification unit fault absorption. The servo controller is applied to a high-reliability new-generation carrier rocket servo system and a guided missile series servo system. On the basis of data communication among three sub-controllers, information interaction and sharing are achieved, and the technic basis is provided for achieving fault absorption of a power amplification unit. Three-redundancy servo valve current signals are collected through a three-way analog-to-digital conversion unit and input to three CPU control units for current monitoring. When one way of power amplification unit has a one-degree fault, the output current of two ways of normal power amplification units is adjusted by adjusting the voltage output of three operational amplifier circuit output ends so as to compensate for the current output of a fault channel. According to the method, one-degree fault absorption of the power amplification units is achieved, the purpose of precisely controlling a three-redundancy servo valve is achieved during one-degree fault of the power amplification units, and when a partial functional circuit has a two-degree fault, the fault absorption function is achieved, and the reliability of the three-redundancy servo controller is improved.

An induction motor high speed control method for weak magnetic operation of a voltage expansion region belongs to the motor control technology field, and is aimed at solving the problems of a conventional induction motor high speed weak magnetic control method that the dynamic performance of voltage closed loop weak magnetic control is poor in a voltage expansion region and the utilization rate of DC bus voltage is low. The method includes the following steps: setting a voltage adjusting parameter kext, and obtaining a weak magnetic factor after the voltage adjusting parameter is processed by a voltage given adjustable weak magnetic controller; carrying out calculation and obtaining a torque component amplitude limit initial value; through processing of the rotating speed of a given rotor and the rotating speed of an actual rotor, obtaining a q-axis given voltage value and a d-axis given voltage value; controlling an induction motor by a self-limiting module in a transition section, and then making the inductor motor enter a first weak magnetic region; and in a second weak magnetic region, enabling output |usd| to be stabilized to be equal to an expression shown in the description through PI adjusting until the rotating speed of the rotor reaches a given value. The induction motor high speed control method is used for weak magnetic operation control of a voltage expansion region of an induction motor.

The present invention discloses a method for enabling fan board modules to be easily pluggable on basis of a blade server, and belongs to maintenance methods of fan modules. The present invention aims at solving the technical problem that a fan control tray is not easy to disassemble and maintain due to the fan control tray is integrated with a plurality of fan modules. The method according to the technical scheme structurally comprises the flowing steps of (1) first, disassembling a fan tray into fan board modules corresponding to a plurality of nodes, the fan board module group being controlled by another individual fan control backboard; (2) then, connecting the fan board modules of each group of calculating nodes to a computing board through the fan control backboard in the step (1); and (3) controlling the fan boards by a control chip on the fan control backboard through IO signals, disposing LED lamps to display fan status, and transmitting information with a system management board SMC through an I2C bus, rotation speeds of the fans being controlled by6 the SMC.

The invention discloses an AVRCP (audio video remote control profile) instruction allocation method and system based on device types. The method comprises steps as follows: a mobile terminal acquires the type of a device sending an AVRCP instruction and judges whether the device sending the AVRCP instruction is a type of vehicle-mounted device when receiving the AVRCP instruction; the mobile terminal allocates the AVRCP instruction to a designated application when detecting that the device sending the AVRCP instruction is the type of vehicle-mounted device; the mobile terminal allocates the AVRCP instruction according to a preset AVRCP instruction allocation principle when detecting that the device sending the AVRCP instruction is not the type of vehicle-mounted device. The mobile terminal can distinguish the vehicle-mounted device when receiving the Bluetooth AVRCP instruction, so that the AVRCP instruction of the vehicle-mounted device is only allocated to the specific application, AVRCP control of other Bluetooth devices on the mobile terminal is not affected, and the response speed of the mobile terminal for specific applications of Bluetooth vehicle-mounted control.

The invention discloses a method and device for updating a program white list knowledge base. The method comprises the following steps of detecting whether an operation of running an installation program is generated in a system or not; if the operation of running the installation program is detected, establishing a process parent-child relationship tree of the installation program and a temporaryprogram white list; executing the installation program in the temporary program white list; judging whether a new file generated in the execution process of the installation program belongs to a process parent-child relationship tree or not; if the new file belongs to the process parent-child relationship tree, storing the file into a temporary program white list; and updating a preset program white list knowledge base according to the temporary program white list. According to the method, the control of the program white list knowledge base on the industrial control system is not affected inthe installation and updating process of the installation program, the program white list knowledge base can be automatically updated in the installation and updating process of the installation program, the installation program is similar to common program installation, and no excessive manual intervention is needed.

The invention provides a communication method among Views in an Android system. The communication method comprises the following steps: 1) defining a View message ID (Identity) corresponding to the View, and adopting a way that relevant data is attached to the View message ID to construct a View message; 2) constructing a corresponding Hash table of the View message and a View entity to realize the registration of the View message in the View, and logging off all View messages registered by the View in the Hash table when the View is removed from an interface; and 3) creating a processing thread, and adopting the processing thread to process the View message. The complexity and the redundancy of Activity are lightened, the function development and expansion of the View can be effectively enhanced, and the control of the View by the Activity is not affected.

The invention discloses an automatic watering device for a drinking trough for pig breeding, which comprises a drinking trough, a pillar, a slide rail and a slider. The drinking trough is provided with several pillars, and the left wall of the inner cavity of the drinking trough is provided with a slide The right side wall of the slide rail is provided with a slider, the bottom of the slider is provided with a buoyancy plate, the left side wall of the drinking tank is connected with an external water pipe, and the outer wall of the external water pipe is plugged with a solenoid valve. The present invention moves up and down through the slider driven by the buoyancy plate, so as to open and close the water outlet, control the amount of water, realize automatic control, and realize the switch of the solenoid valve by driving the spring stretch switch through the slider without adding intelligence. The equipment realizes the automatic opening and closing of the water flow, saves costs, is simple and fast to operate, and is integrated in operation. By setting up several pillars in the drinking tank, it can effectively prevent the pigs from damaging the equipment, and at the same time, it does not affect the control of the water volume. It is more practical , suitable for widespread promotion and use.

The embodiment of the invention discloses a dual-motor synchronization control method, system and a computer readable storage medium, which relate to the technical field of industrial control. Synchronization control of dual motors is realized through adopting a control algorithm combining position prediction synchronization and torque synchronization control, the problem of position deviation ofthe dual motors caused by data transmission delay can be avoided, the torque balance of the dual motors can be kept in a position synchronization process, and the problem of uneven force of a mechanical device can thus be avoided; in addition, in comparison with the existing mode of realizing position synchronization control on dual motors through frequency division, a high-speed IO or a hardwarecircuit does not need to be added, and external interference does not happen; in comparison with the existing mode of realizing position synchronization control on dual motors through a high-performance PLC, no high-performance PLC is needed, the cost and the complexity of the synchronization control system are reduced, and the control performance of a simple PLC communicating with the dual-motorsynchronization control system is not affected.

The invention provides a distributed control method for unbalanced voltage compensation of an island alternating-current micro-grid without continuous communication, and solves the problem that voltage imbalance may occur in an alternating-current micro-grid system due to unbalanced load connection in a sensitive load bus (SLB). A new distributed control strategy provided by the invention is used for realizing unbalanced voltage compensation among distributed power generation units in the island alternating current micro-grid with limited discontinuous communication, a two-layer control framework is adopted and comprises a network layer and a main control layer, and the provided control strategy applied to the network layer realizes event-triggered communication, so that the communication efficiency is improved. Therefore, the unbalanced voltage in the SLB can be effectively compensated. Compared with a centralized control strategy, the provided control strategy is completely distributed, and information exchange between the DG units is only carried out when an event is triggered. The result is that the communication burden can be significantly reduced without affecting the control performance.

The invention discloses a PE ball core automatic polishing system based on torque control and a control method. The invention solves the problem that PE ball core polishing equipment in the prior artis complex in structure, high in operating demand and narrow in applicability. The system comprises a supporting frame, wherein a ball core rotating mechanism that clamps a PE ball core is arranged inthe supporting frame, and a two-degree-of-freedom moving mechanism is arranged on the upper part of the supporting frame; the two-degree-of-freedom moving mechanism comprises a first moving assemblyand a second moving assembly, and the first moving assembly is slidably arranged on the supporting frame through a ball core positioning mechanism; a polishing mechanism is arranged on the second moving assembly and comprises a polishing cloth wheel, and the polishing cloth wheel performs a circular motion along the surface of the PE ball core. Polishing is performed according to a sequence of ball core clamping, ball core positioning, parameter setting, ball core polishing and stopping resetting. The system polishes the PE ball core automatically, is easy to operate, is low in demand on operating experience and technical level of an operator and wide in application range, and ensures high polishing precision.

The invention relates to the technical field of oil field drilling development, and particularly relates to a continuous axial impact rock breaking hammer. A bearing shaft is arranged in the upper end of a shell of the device; the upper end of the bearing shaft is sleeved with a stator upper top ring; the stator upper top ring is fixed to the inner wall of the shell; the middle of the bearing shaft is sleeved with a rotor locking nut; the rotor locking nut and the bearing shaft are sealed; and a bearing is arranged at the lower end of the rotor locking nut in series and arranged on the bearing shaft in a sleeving manner. On the premise that borehole track control is not affected, the rock breaking efficiency of various drill bits can be improved, the structure is reasonable, the overall length is small, borehole track control is not affected, controllable pressure pulse waves can be generated, the frequency is high, high-frequency impact on the drill bits can be achieved, the hammer is directly connected with the drill bits, impact force directly acts on drill bit bodies, no energy loss exists in the middle, the impact force can be adjusted, the service life of the whole hammer is long, no quick-wear part exists, the continuous work time is long, reliability is high, and installation is convenient.

The invention discloses an animal husbandry intelligent management system based on machine vision analysis. The system comprises an animal husbandry management system, a monitoring subsystem, an embedded intelligent analysis subsystem, a feedstuff management subsystem and a livestock house management subsystem, wherein the animal husbandry management system is used for receiving information transmitted by the subsystems to control the subsystems; the monitoring subsystem is used for monitoring feedstuff channels and livestock house environments and providing clear video data for the embedded intelligent analysis subsystem; the embedded intelligent analysis subsystem is used for detecting the video data collected by the monitoring subsystem according to the setting information of areas to be detected to obtain a feedstuff detecting area and a dung channel detecting area; the feedstuff management subsystem is used for managing feedstuff in a feedstuff channel according to instructions of the animal husbandry management system; the livestock house management subsystem is used for managing livestock houses according to instructions of the animal husbandry management system. The animal husbandry intelligent management system based on the machine vision analysis has the advantages of intelligentized control, stable performance and lower management cost.

The invention relates to a real-time excitation recording system, including an excitation real-time oscillography tool and an excitation record and playback tool. The excitation real-time oscillography tool is used for timely obtaining and processing recording data messages to obtain recording data of each sampling channel and carrying out oscillography and storage. The excitation record and playback tool is used for guiding in, playing back and analyzing the recording data. The real time collection capacity of an excitation controller is used as a data source, and by a network communication mode, the excitation real-time oscillography tool is used for completing extraction, connection and storage of data of each channel, and thus requirements for long-term real-time data recording are met, and control performances of the excitation controller cannot be influenced.

The invention provides a flapping door unit transmission mechanism and a flapping door unit, belongs to the field of access control, automatic ticket checking equipment and rail transit equipment. Theflapping door unit transmission mechanism is used in the flapping door unit, the flapping door unit includes a motor and a flapping door rotating shaft, and the transmission mechanism includes a drive synchronous pulley, a synchronous belt and a driven synchronous pulley. The drive synchronous pulley, the driven synchronous pulley and the synchronous belt are horizontally disposed. The axis of the drive synchronous pulley and the axis of the driven synchronous pulley are both perpendicular to the horizontal plane. The drive synchronous pulley and the driven synchronous pulley perform synchronous transmission through the synchronous belt, and the torque of a main shaft of the motor is transmitted to the flapping door rotating shaft. By using the flapping door unit transmission mechanism and the flapping door unit, the precision of the movement and braking of a flapping door is improved, the installation space is greatly saved, the cost of a gate machine is reduced, and the maintenancetime and labor cost are saved.

The invention relates to a neutral-point voltage regulation method for a three-phase three-level inverter. The method includes: according to a difference between a direct-current-side voltage and each of a maximum voltage value and a minimum voltage value of a three-phase bridge arm of the three-level inverter, calculating a numerical value which can be added to or subtracted from a voltage vector, corresponding to a PWM (pulse-width modulation) period, o f the three-phase bridge arm; obtaining control time of a switching device in the three-phase bridge arm according to a given neutral-point voltage regulation coefficient; comparing the control time with a carrier wave according to a PWM modulation rule of the three-level inverter to generate a control instruction for driving the switching device in the three-level inverter. Neutral-point voltage regulation and control are realized by means of selection of switch variables, and easiness in implementation and effectiveness in improvement of operation efficiency are realized.

The invention provides a charging box body which is used in cooperation with a wireless earphone. The wireless earphone comprises an earphone main body and an earphone side magnetic part; the charging box body comprises a box body power supply, a single-pole Hall switch and a box body side magnetic part, wherein a first magnetic pole of the earphone side magnetic part can be magnetically attracted to a second magnetic pole of the box body side magnetic part; the single-pole Hall switch is electrically connected to the box body power supply, the single-pole Hall switch is used for sensing a first magnetic pole of the earphone side magnetic part, the first magnetic pole of the box body side magnetic part is provided with a magnetic field coverage area which can be covered by a magnetic field, and the single-pole Hall switch avoids the magnetic field coverage area; when the first magnetic pole of the earphone side magnetic piece is sensed, the box body power supply is in a turn-on state, and the box body power supply can charge the earphone main body in the turn-on state. The charging box body can achieve the automatic alignment of the wireless earphone through the box body side magnetic part, and can achieve the starting of the power supply of the box body through the single-pole Hall switch just through the approaching of the wireless earphone.