42results about How to "Improve quick response" patented technology

The invention relates to a digital electro-hydraulic control system used for a power station steam turbine set. The digital electro-hydraulic control system comprises a workstation, a control processor, an overspeed protective device, a valve actuating clamping piece, a servo valve, an oil servo-motor and a steam turbine which is provided with an intermediate-pressure cylinder provided with an intermediate pressure adjusting valve and a high pressure cylinder provided with a high pressure main throttle valve and a high pressure adjusting valve. The invention is characterized in that: the control processor also comprises a control unit which receives a signal from the overspeed protective device, calculates and processes the signal, and transmits the signal to the overspeed protective device to control the opening and closing of the intermediate pressure adjusting valve and the high pressure adjusting valve. The invention also discloses a method for controlling the intermediate pressure adjusting valve of the digital electro-hydraulic control system used for the power station steam turbine set. Because the technical proposal is adopted, the defects of the prior control system are completely overcomed, the control system is safe and reliable, the program control for rotating speed and load of the set can be more accurate, switching speed of a TV / GV causes small wave motion, and the characteristic of quick response of the set is also improved at the same time.

An antenna plane near-field test scanner adopts a brand-new design and is composed of a direct drive motor (a linear motor for short) serving as a drive element and an industrial personal computer and a position measurer serving as control units, as well as a probe and a PC (personal computer) serving as data sampling units. In an antenna plane near-field test, in particular a millimeter wave antenna test, a space plane is scanned with high precision at a high speed and antenna near-field amplitude-phase data is sampled at the same time. The linear motor is used as the drive element for driving the scanner to move in X and Y directions, a screw rod, a gear wheel, a rack and a speed reducer are not used, a load is directly driven, and an error such as a back clearance is eliminated. The advantage of closed-loop control is brought into fully play, accurate and high-speed positioning is realized, and the needs of the millimeter wave antenna near-field test can be well met.

The invention discloses an electric steering engine design method adopting a compound control of pure fuzzy and fuzzy PID. The electric steering engine design method adopting compound control of pure fuzzy and fuzzy PID comprises steps of measuring an angle position signal of the steering engine to perform feedback, comparing the angle position signal with an input steering engine signal to form an error signal, designing a pure fuzzy control rule database through different magnitudes of errors to realize automatic tracking on basic input signals by the electric steering engine, forming an error differential term through an angular velocity signal measuring rotation of the steering engine calculating, generating an error differential integral term through calculation, constituting PID through the error, the error differential and error integration, designing a fuzzy regulation rule database of a PID control coefficient through the error and the error differential to realize fuzzy dynamic regulation of the control coefficient in the fuzzy PID control, and compounding a pure fuzzy control rule and the fuzzy PID control rule in order to improve the fastness of the electric steering engine and realize fast tracking of the input order of the steering engine. The beneficial effect of the electric steering engine design method is that the electric steering engine designed by the invention has a better fast response compared with a traditional electric steering engine.

The invention discloses a modular joint of a collaborative robot, and belongs to the technical field of robots. The modular joint of the collaborative robot comprises a joint shell, a motor, a harmonic speed reducer and a brake structure, the motor used for driving the harmonic speed reducer to rotate is installed in the joint shell, the harmonic speed reducer serves as a front cover of the jointshell to be installed at the end of the joint shell, the output end of the harmonic speed reducer is arranged in the joint shell and connected with an encoder assembly, a brake pad is installed at theoutput end of the motor, and the brake structure used for controlling the brake pad to be in a brake state or a non-brake state is installed on the encoder assembly. The modular joint of the collaborative robot is sufficient in position braking precision, sufficient in braking force, high in force feedback sensitivity, compact in structure, good in replaceability, capable of being produced on a large scale, high in cooperativity and high in safety.

The invention relates to the technical field of data marts and data warehouses, in particular to a data modeling method for data marts and data warehouses, which comprises the following steps: a stepof building a bus architecture: extracting main data of a service system for automatic integration, obtaining a public consistency dimension, and building a standard bus interface; a data processing step: classifying the business data tables, and automatically screening a data extraction mode to extract the business data tables according to a classification result; and a model integration step: combining the business data tables through the inverse three normal forms, splitting the business data tables to form a fact table and a plurality of dimension tables, and constructing a dimension modelwhich takes the fact table as a main part according to the fact table and the plurality of dimension tables. By the adoption of the scheme, the technical problems that in the prior art, due to the fact that all independent data markets are independently constructed by all users or departments, data architectures of the independent data markets are independent of one another and cannot be reused,data islands are easily caused, and meanwhile standardization, consistency and accuracy of enterprise data cannot be guaranteed can be solved.

With an engine start-up device, an engine is started upon altering a start-up when shifting an automatic shifting portion relative to when the automatic shifting portion is not shifting. Thus, start-up of the engine is prevented from adversely affecting the shifting of the automatic shifting portion. The engine starts during the shifting of the automatic shifting portion, enabling further improved response in acceleration required by a driver than that achieved when the operation is commenced after the automatic shifting portion has completed the shifting.

The invention relates to a digital electro-hydraulic control system used for a power station steam turbine set. The digital electro-hydraulic control system comprises a workstation, a control processor, an overspeed protective device, a valve actuating clamping piece, a servo valve, an oil servo-motor and a steam turbine which is provided with an intermediate-pressure cylinder provided with an intermediate pressure adjusting valve and a high pressure cylinder provided with a high pressure main throttle valve and a high pressure adjusting valve. The invention is characterized in that: the control processor also comprises a control unit which receives a signal from the overspeed protective device, calculates and processes the signal, and transmits the signal to the overspeed protective device to control the opening and closing of the intermediate pressure adjusting valve and the high pressure adjusting valve. The invention also discloses a method for controlling the intermediate pressureadjusting valve of the digital electro-hydraulic control system used for the power station steam turbine set. Because the technical proposal is adopted, the defects of the prior control system are completely overcomed, the control system is safe and reliable, the program control for rotating speed and load of the set can be more accurate, switching speed of a TV / GV causes small wave motion, and the characteristic of quick response of the set is also improved at the same time.

The invention discloses an electric steering engine design method adopting a compound control of pure fuzzy and fuzzy PID. The electric steering engine design method adopting compound control of pure fuzzy and fuzzy PID comprises steps of measuring an angle position signal of the steering engine to perform feedback, comparing the angle position signal with an input steering engine signal to form an error signal, designing a pure fuzzy control rule database through different magnitudes of errors to realize automatic tracking on basic input signals by the electric steering engine, forming an error differential term through an angular velocity signal measuring rotation of the steering engine calculating, generating an error differential integral term through calculation, constituting PID through the error, the error differential and error integration, designing a fuzzy regulation rule database of a PID control coefficient through the error and the error differential to realize fuzzy dynamic regulation of the control coefficient in the fuzzy PID control, and compounding a pure fuzzy control rule and the fuzzy PID control rule in order to improve the fastness of the electric steering engine and realize fast tracking of the input order of the steering engine. The beneficial effect of the electric steering engine design method is that the electric steering engine designed by the invention has a better fast response compared with a traditional electric steering engine.

The invention relates to a magnetoresistive magnetic surface gear set for orthogonal shaft transmission and belongs to the electromechanical transmission field. The objective of the invention is to solve the problems of high cost, complex structure and difficulty in manufacture and assembly of currently-used permanent magnet face gears and bevel gears used for orthogonal shaft transmission. The magnetoresistive magnetic surface gear set for the orthogonal shaft transmission of the present invention comprises two wheels, namely, a cylindrical wheel and a planar wheel; the planar wheel is arranged horizontally; the cylindrical wheel is arranged above the planar wheel; the center lines of the wheel shafts of the cylindrical wheel and the planar wheel are orthogonal to each other; an air gap is left between the cylindrical wheel and the planar wheel; when one of the cylindrical wheel and the planar wheel is a driving wheel, the other wheel is a driven wheel; the driving wheel drives the driven wheel to rotate through a magnetoresistive force; and when one of the cylindrical wheel and the planar wheel is a permanent magnet wheel, the other wheel is a mechanical wheel. According to the magnetoresistive magnetic surface gear set of the invention, the cylindrical wheel and the planar wheel do not mechanically contact with each other directly, and therefore, the gear set has the advantages of no wear, no noises, high transmission efficiency, high reliability, maintenance-free performance, overload protection and so on.

The invention discloses an abnormal data analysis and fault positioning system of first-aid repair of a power distribution network and a method. The system comprises a power distribution network first-aid repair command platform which is connected with an intelligent public transformation monitoring system, an intelligent comprehensive leakage protector power distribution automation system, a 95598 system, an onsite line patrol monitoring device and an electricity utilization information acquisition system. The power distribution network first-aid repair command platform is used for distributing unique ID numbers to the power distribution automation system, the 95598 system, the onsite line patrol monitoring device and the electricity utilization information acquisition system respectively. Attributes of fault positioning schemes are gathered according to the fault positioning schemes, and each ID number is bonded a matched fault positioning scheme in the corresponding fault positioning scheme. Information transmitted by the power distribution automation system, the 95598 system, the onsite line patrol monitoring device and the electricity utilization information acquisition system are received and associated with corresponding ID numbers for classified storage. Fault positioning is performed on the information with the same ID numbers and positioning results are output.

A sealing packing compacting device adaptive to the pressure of the environmental medium, including a stuffing box, the stuffing box is provided with a stepped through hole, a rotating shaft passes through the stepped through hole and forms a filling cavity with the stepped through hole, and the sealing packing is filled in the filling cavity ;In the inner side of the stuffing box, a pressing plate is installed, and the inner end surface of the central through hole of the pressing plate is provided with a flange to match the filling cavity. The compact disk is connected, and an axial expansion bag is installed on the outer end surface of the compression disk, and the axial expansion bag is connected with the pressure medium outside the cabin through the supercharger through the pipeline. The invention uses the pressure of the environmental medium as the power source, saves energy, is green and environmentally friendly, and is suitable for low energy consumption requirements during long-term voyages; at the same time, it ensures the sealing performance and the normal work of the sealing packing; the pressing force changes rapidly following the environmental pressure, and responds quickly Good safety; the shut-off valve is set at an easy-to-operate position, which reduces the burden on personnel and has good safety.

The invention discloses a reverse serial connection control system and method for three direct-current motors. Eight IGBT modules of a four-phase inverter are connected in series two by two to form four bridge arms which are connected with the positive electrode and the negative electrode of a direct-current power supply in parallel; the three direct-current motors in reverse serial connection areconnected with the four bridge arms in series; the three direct-current motors pass through a speed sensor, a current sensor and a speed adjustment module in sequence and then are connected with a reference voltage synthesizer through a two-stage PI controller separately; the reference voltage synthesizer is connected with the four-phase inverter through a PWM pulse generation unit; the four-phase inverter is connected with the reference voltage synthesizer through a current adjusting module and a first-stage PI controller separately, and is connected to the PWM pulse generation unit throughthe reference voltage synthesizer; and pulse control signals generated by the PWM pulse generation unit are used for controlling on-off of the eight IGBT modules to drive the three current-current motors to run. By virtue of the reverse serial connection control system and method, four-quadrant operation of the three motors can be realized, the running direction and the operation speed of the motors can be changed, the energy of a motor feedback system can be sent back to the power grid, and the energy consumption is lowered.

The invention discloses a permanent-magnet linear motor based on an arc-shaped and inner-step shaped hybrid structure of a stator. The motor comprises a stator armature primary side and a Halbach permanent-magnet mover secondary side, the stator armature primary side is located on the outer side of the permanent-magnet mover secondary side, the stator armature primary side is formed by a stator iron core and an armature winding, inner-step shaped structures are adopted by the ends of two sides of the stator iron core, and arc-shaped structures are adopted by inner teeth of the stator iron core; the permanent-magnet mover secondary side is formed by a mover iron core and a permanent magnet adhering to the surface the of the iron core, and a Halbach array structure is adopted by the permanent magnet. By means of the motor, air gap magnetic flux larger than a conventional magnet can be obtained, the motor has a better magnetic shielding effect, and the thickness of a magnetic conductive yoke of the mover can be reduced. The invention provides an analysis model of an arc-shaped tooth structure, and the magnitude of magnetic conductance and a magnetic conductance-position variation curve can be derived by means of the model. The optimal structure of the motor is obtained by adopting a Taguchi optimization algorithm.

The invention discloses a pressure-balanced valve type common-rail fuel injector which comprises a fuel injector body, a piston rod, fuel nozzle matching parts, pressure-balanced valve matching parts and an electromagnetic valve assembly.The fuel injector body is connected with the electromagnetic valve assembly, the pressure-balanced valve matching parts are connected with the fuel injector body, and the fuel injector body is connected with the fuel nozzle matching parts.The fuel nozzle matching parts comprise a needling valve, a step-shaped cavity is formed in the axial center of the fuel injector body, a sealing cavity is formed between the pressure-balanced valve matching parts and the piston rod, a protrusion is arranged on one side of the fuel injector body and provided with an inclined first fuel inlet hole of the fuel injector body, and a second fuel inlet hole of the fuel injector body is formed in the lower side of the first fuel inlet hole and is communicated with a fuel storage cavity in the lower portions of the pressure-balanced valve matching parts.The fuel injector body is connected with a high-pressure rail pipe, a fuel injector body fuel inlet is communicated with an upper portion inner hole, the upper portion inner hole is connected with a sealing cavity through a throttling hole, and a valve seat installation hole is formed in the upper portion of the upper portion inner hole and matched with the pressure-balanced valve matching parts.The diameter of the sealing surface on the upper portion of the piston rod is larger than the diameter of the intersecting line of the needle valve.

The invention discloses a method for vaguely predicting, compensating and controlling tower top temperature during desulfurization of sintering flue gas. Aiming at the problem that the tower top temperature cannot be stably controlled due to the influence of system time delay and external disturbance during desulfurization of the sintering flue gas, the method comprises the following steps of: building a prediction model of the tower top temperature by using a heat transfer mechanism; designing a vague prediction and compensation controller of the tower top temperature by taking the difference between a prediction value and a set value as input; and compensating water injection quantity by using model rule. By the method, main disturbance in a system is introduced into the prediction model, and a compensation value is calculated according to the difference between the prediction value and the set value, so the problems of poor stability of the system caused by large fluctuation of disturbance factors and the time delay of the system are solved.