112results about How to "Good real-time control" patented technology

The invention discloses bearing-free switch reluctance motor having an axial-direction parallel hybrid structure and a control method of said motor. A motor stator is composed of a reluctance motor stator and a magnetic bearing stator. A rotor is composed of a salient pole rotor and a cylinder rotor. The windings are composed of torque windings and suspension windings. The torque windings are composed of reluctance motor windings and wide-tooth windings and the number of the torque windings is identical to phase number m. The suspension windings are two and are arranged in the radial direction. The magnetic bearing stator is composed of four E-shaped structures and the width of each middle tooth is twice of the rest. According to the invention, suspension current is calculated according to a suspension force direction. Current of the torque windings and switching-on and switching-off angles of a power circuit are controlled separately and rotation speed and torque are controlled in real time. Current of the two suspension windings is controlled separately, suspension forces are regulated in real time and mutual decoupling is realized in rotation and suspension. According to the invention, the quantity of control variables is small; suspension control is simple; and a power converter of a suspension system is low in cost.

The invention provides a multi-shaft AC servo motor control device, which comprises a parallel bus communication module, a PWM cycle counter module, an encoder feedback signal processing module, an AD interface module, a first sequential control module, a position loop computation module, a first filter group, a second filter group, a speed loop computation module, a third filter group, a data conditioning module, a CLARK transformation module, a PARK transformation module, first and second current loop computation modules, a counter electromotive force compensation module, a cross decoupling compensation module, a bus voltage compensation module, an IPARK transformation module, an ICLARK transformation module, an SVPWM module, a second sequential control module, a PWM comparator module and a dead zone insertion module. When the multi-shaft AC servo motor control device is used, the control hysteresis of a position loop, a speed loop and a current loop can be eliminated, the real-time property is good and the control precision is high; and through the global PWM cycle counter, the complete synchronization between multiple motor shafts can be realized.

The invention discloses a system for testing comprehensive performance of a metal roof. The system comprises an upper tank body (1), a lower tank body (2), a sealing piece (18), a support (21), a first air supply/exhaust device, a pump (6), a shower pipe (60), a shower nozzle (61), a refrigerator (7), a refrigerating pipe (71), an electric control device (9), a hanging rod (11), a displacement sensor (12), an electric heater (13), a net rack (14), a temperature/humidity sensor (15), and a wind pressure sensor (91), wherein a closed space is formed by the upper tank body (1) and a metal roof testing piece (8); a closed space is formed by the lower tank body (2) and the metal roof testing piece (8); the first air supply/exhaust device comprises a first fan (3) and a reversing valve (5); a reversing device is arranged in the valve body of the reversing valve (5); when the reversing device is in a first reversing state, the first fan (3) exhausts air from the upper tank body (1); and when the reversing device is in a second reversing state, the first fan (3) supplies air to the upper tank body. The system for testing the comprehensive performance of the metal roof can be widely applied to the field of test of metal roofs.

The present invention discloses a taper magnetic bearing switched reluctance motor and a control method thereof. The motor is composed of a switched reluctance motor and two taper magnetic bearings; the bias windings of the two taper magnetic bearings are connected in series with the winding of the switched reluctance motor to a form m-phase torque winding; two vertical suspension windings of each taper magnetic bearing are configured to control the suspension with two degrees of freedom, have four vertical degrees of freedom and are able to perform decoupling control; the axial suspension windings of the two taper magnetic bearings are connected in series to form an axial suspension winding for controlling the axial suspension; the motor is able to independently control the opening and closing angles of a torque winding current and power circuit to control the rotating speed and the torque in real time; and the motor is able to control five suspension winding currents to regulate the suspension forces in five directions so as to realize the suspension with five degrees of freedom. The taper magnetic bearing switched reluctance motor and the control method thereof are small in control variables, simple in suspension control and low in cost of a suspension system power converter.

The invention belongs to the field of additive manufacturing process detection and particularly relates to a laser three-dimensional forming process detecting system and method. A CCD molten pool detecting device, a pyrometer temperature detecting device, a structured light three-dimensional morphology detecting device, a data fusion evaluation model, a data management system and the like are mainly involved. The CCD molten pool detecting device is used for acquiring data for the molten pool state, plume and splash; the pyrometer temperature detecting device is used for acquiring molten pool center point average temperatures; the structured light three-dimensional morphology detecting device is used for acquiring data of three-dimensional morphologies of parts or the current layer or the area of and near a molten pool in the forming process; the data fusion evaluation model is used for performing fusion analysis and mutual comparative evaluation on the current data and obtaining fusioncharacteristic data; and the data management system is used for acquiring all process data including detecting data, forming process speed data, material data, motion coordinate data and the like, storing and managing the data according to a relation model, and pushing optimum process parameters according to the real-time state.

The invention discloses an anomaly detection method for a vehicle-mounted CAN bus, and belongs to the technical field of information security. The invention provides an anomaly detection method of a vehicle-mounted CAN bus for message data bits of the vehicle-mounted CAN bus. According to the characteristics of the data bits, the data bits of the vehicle-mounted CAN bus message are divided into eight characteristics which respectively represent different instruction meanings and carry important control information, and the method is particularly important for anomaly detection of the data bits. Abnormality detection of CAN message data can be regarded as a dichotomy problem, normal data and abnormal data in machine learning. According to the method of the support vector machine, classification with small errors can be obtained through limited training samples, and the classification accuracy is high. According to the invention, a support vector machine (SVM) method is adopted to realize anomaly detection of the vehicle-mounted CAN bus.

The invention provides a composite structure duplex winding maglev switched reluctance motor which comprises a reluctance motor stator, a reluctance motor rotor, a conical magnetic bearing stator, a conical magnetic bearing rotor, torque windings, suspension force windings and a rotating shaft. The reluctance motor stator is of a salient pole structure, the conical magnetic bearing stator is of a conical salient pole structure, and the reluctance motor stator and the conical magnetic bearing stator are each provided with twelve teeth. The reluctance motor stator and the conical magnetic bearing stator are placed in a serial mode in the axial direction, and a gap is reserved between the reluctance motor stator and the conical magnetic bearing stator. The reluctance motor rotor is of an eight-pole structure, the conical magnetic bearing rotor is of a conical cylinder structure, and the reluctance motor rotor and the conical magnetic bearing rotor are arranged on the rotating shaft in a sleeving mode. The number of the torque windings and the number of the suspension force windings are both twelve, each torque winding is wound above the reluctance motor stator and the conical magnetic bearing stator at the same circumferential position, and each suspension force winding is wound on the conical magnetic bearing stator. The composite structure duplex winding maglev switched reluctance motor structurally achieves decoupling of the torque and the suspension force, and radial baring capacity is large; the influence of motional electromotive force on control over current chopped waves is eliminated, the real-time control effect of currents is good, high-speed adaptability is high, radial and axial suspending power is achieved, and the integration level is high.

The invention discloses a conical magnetic suspension dual-passage switch reluctance machine and a control method. The machine comprises a switch reluctance machine and two conical magnetic bearings, wherein a bias winding of each conical magnetic bearing is connected in series with a passage winding of the switch reluctance machine to form a three-phase torque winding, two radial suspension windings of each conical magnetic bearing control suspension of two degrees of freedom, total four radial degrees of freedom exit, radial suspension forces can be in decoupling control, and a torque and axial suspension are further controlled by currents of two passage windings of the switch reluctance machine. By the switch reluctance machine and the control method, an axial suspension winding is not needed independently, suspension of five degrees of freedom can be achieved, the machine system is high in integration, a few in control variable and high in redundancy, and is simple to control.

The invention belongs to the technical field of computer systems, and discloses a signal injection-based PMSM stator winding temperature online detection method. The method comprises the steps of establishing a high-performance PMSM stator temperature online calculation method, and adding an optimal signal injection strategy into the online calculation method; adding vector control on the basis ofan existing signal injection method to form a new signal injection method; performing direct current component extraction in the new signal injection method; and calculating the stator resistance andthe estimated temperature and obtaining the real-time temperature observed data. The temperature of the stator winding of a permanent magnet synchronous motor is estimated online, so that the healthcondition of the motor can be monitored, and over-temperature generation can be prevented, and the methods can also be used in motor optimization control such as active heat management and the like, and is beneficial to improving the performance of an electric driving system.

The invention relates to idle speed control of an engine, and discloses a method for controlling idle speed of an electronically-controlled unit of a motorcycle engine. The method comprises the following steps: determining whether the engine is in an idle speed working condition or not; if so, starting the electronically-controlled unit; determining whether driving condition of an electromagnetic valve is fulfilled or not; if so, waiting for driving and calculating driving time simultaneously; transmitting a calculating result to the electromagnetic valve to drive the electromagnetic valve; checking the driving time to determine whether driving is completed or not; and if not, stopping driving the electromagnetic valve. The invention realizes excellent real-time control by the electronically-controlled unit to ensure that the engine can work at minimum rotating speed normally, and controls air input inside a cylinder based on the best air-fuel ratio to ensure that fuel of the engine can be combusted more sufficiently under the idle speed working condition, thereby reducing content of harmful gases in tail gas emission at this moment, and achieving specified emission standard.

The invention discloses an internet-of-things gateway achieving IP virtualization conversion. The internet-of-things gateway comprises two real network adapters which are simultaneously connected with a network adapter scheduling module, one real network adapter is a main real network adapter, and the other real network adapter is a standby real network adapter; the network adapter scheduling module is connected with a data storage module and at least two virtual network adapters, each virtual network adapter is correspondingly connected with a data communication module, at least one data communication module is connected with a signal input module, and the other data communication module is connected with a signal output module; the signal input module is connected with a sensor, and the signal output module is connected with an agriculture control device; an input channel is formed between the signal input module and the corresponding virtual network adapter, and an output channel is formed between the signal output module and the corresponding virtual network adapter.

The invention discloses a micro-controller used for motor control. The micro-controller used for motor control is characterized by comprising a processor, a storage unit, a clock generation unit, a math co-processor, a programmable analog amplifier, an analog-to-digital converter, a motor control unit, a comparator and a bus unit. The processor, the storage unit, the clock generation unit, the math co-processor, the programmable analog amplifier, the analog-to-digital converter, the motor control unit and the comparator are connected via the bus unit.

The invention relates to a management system for relations of hospital clients, which comprises a service processing module connecting with the data base of the server, a calling device and an agent interface. The hospital client-side is connected with the calling device via the agent interface, according to the received information of the calling device, the server records the client data, client condition, calls the data base and makes resource allocation treatment, according to the need of the client, the server finds out the adapting data and generates report or reservation result. The management system for relations of hospital clients of the invention is an intelligent management system with high efficiency, large volume and multiple function which links hospital and the client. Additionally, the invention has functions of data collecting, data statistical analyzing, real-time reservation and the like and is capable of providing data analyzing reports of three big categories of operation, behavioral analysis and scientific research prediction.

The invention provides a safeguard system of a rubber wheel car. When the vehicle exceeds limit first-level vehicle speed, an exhaust brake closes a butterfly valve and stops supplying fuel oil, in this way, kinetic energy of the vehicle is consumed, and an auxiliary braking effect is achieved; when the vehicle does not achieve an expected speed reduction effect under the auxiliary effect of the exhaust brake, and the vehicle speed exceeds limit second-level set vehicle speed, an air-cut brake of the vehicle is automatically started and plays a role in brake speed reduction; under the condition that stalling happens on the car, current two levels of brake systems can not effectively achieve the brake effect, and the vehicle speed exceeds limit third-level vehicle speed, a control system will automatically start a roadway road surface intercepting mechanism to effectively intercept the vehicle with stalling. The system is simple in structure, high in practicability and easy to refit on a common mine vehicle, intelligently controls the vehicle speed and intercepts the vehicle with stalling.

A DC voltage balance control strategy for cascade multi-level pow electronic converter with single-direction energy flow is compose of sequencing module, matching module, operation module and modulation wave generation module. The invention improves the traditional one-cycle control, in addition to the advantages of not changing the use of a phase locked loop for one cycle control and the use of avoltage sensor for the ac side, Compared with the DC voltage balance control strategy based on traditional PI control, the adjustable speed is fast, Advantages of wide adjustment range, when the unbalance of DC voltage of cascaded multi-level power electronic converters with one-way energy flow is large, the unbalance of DC voltage of cascaded multi-level power electronic converters with one-wayenergy flow is large, The method of the invention can make the cascade multi-level power electronic converter with energy flow in one direction to regulate the DC voltage of each stage at the maximumrate to keep the balance, and make the AC side of the whole circuit run under the condition of low harmonic and high power factor.

The invention discloses a hybrid electromagnetic magnetic bearing switch reluctance motor. The hybrid electromagnetic magnetic bearing switch reluctance motor is composed of a motor stator, a reluctance motor rotor, a magnetic bearing stator, 12 torque windings, 12 suspension force windings and a rotating shaft; each of the reluctance motor stator and the magnetic bearing stator comprises 12 poles, the reluctance motor stator and the magnetic bearing stator are arranged in series in the axial direction, and a gap is formed there-between; the reluctance motor rotor comprises 8 poles, the magnetic bearing rotor is cylindrical, both the reluctance motor rotor and the magnetic bearing rotor sleeve the rotating shaft, and a gap which is equal to the distance between the magnetic bearing stator and the reluctance motor rotor is formed between the reluctance motor rotor and the magnetic bearing rotor; each torque winding winds a reluctance motor stator tooth and a magnetic bearing stator tooth in the same circumferential position, and each suspension force winding winds a magnetic bearing stator tooth. By means of the structure, the hybrid electromagnetic magnetic bearing switch reluctance motor realizes to decouple the torque and suspension force, and the radial bearing force is large; the influence of motion electromotive force on the suspension current chopping control is avoided, the real-time control effect of the current is good, and the high-speed adaptability is strong.

The invention discloses a collaborative robot constant-force massage method based on a PID algorithm. The method comprises following steps: equipment is mounted; a power-on button on a robot demonstrator is pressed, and a robot control system is powered on; a human-computer interaction software program is operated on an upper computer, a human-computer interface is started, and a constant-force value and a stepping value of constant-force massage are set by a user; a communication channel with the upper computer is constructed; a displacement compensation value and a posture compensation valueare calculated according to a force value and a torque value, measured by sensors, of a robot terminal; robot terminal force is corrected by the calculated compensation values; the massage is completed, the upper computer stops operation, and the robot stops movement. The massage effect is good, and the human comfort is higher; the method is simple to operate, good in real-time property, low in noise and higher in safety; the posture of the robot can be adjusted automatically in the massage process, and the level of intelligence is higher; the robot is less affected by external disturbance, and the robustness is good.

The invention discloses a data collection and transmission system based on a vibration wire sensor. The data collection and transmission system is characterized by comprising a control unit and a communication unit. The control unit comprises a power module, a control module, a GPRS (General Packet Radio Service) module, a collection module and a sensor module. A work method comprises the steps of power on, power supply mode switch, signal collection, diagnosis and display, data analysis and display, parameter setting instruction sending. The data collection and transmission system has the advantages of being simple in device, achieving modularization processing, being easy to communicate, collecting data regularly and in real time, being low in power consumption, being good in stability and improving data collection efficiency. The GPRS module and the collection module can be selectively powered on, are powered on when working and are powered down when not working, so that the whole data collection and transmission system are in a low power consumption mode.