166 results about "Complex control system" patented technology

The invention relates to a complex control system and method of a modular multi-level converter. The method is characterized in that each submodule capacitor voltage of an upper bridge arm and a lower bridge arm on the modular multi-level converter, currents of the upper and lower bridge arms and a power supply voltage of an alternating current (AC) side are detected, and a master controller carries out an operation on each submodule capacitor voltage, the currents of the upper and lower bridge arms and the power supply voltage of the AC side to obtain the public pulse-width modulation (PWM) duty ratio of the upper and lower bridge arms; an upper and lower bridge arm controller carries out an operation on each submodule capacitor voltage of the upper and lower bridge arms and the public PWM duty ratio of the upper and lower bridge arms to obtain the PWM duty ratio of each submodule of the upper and lower bridge arms; and the PWM duty ratio of each submodule is processed by a PWM signal generator so as to generate PWM control signals of each submodule, thus realizing balance control of each submodule capacitor voltage of the convertor and current and voltage control of the convertor. The complex control system is not required to use a special charge-discharge power circuit for a capacitor, can be applied to any PWM node, controls circulating flow flexibly, meets special demands, and is specific in physical significance and sufficient in theoretical foundation.

The invention discloses an optimal energy-saving method for controlling the surface pollutant discharge of a steam boiler. The method comprises the steps of firstly controlling the flow of pollutant discharge according to the steam flow proportionally, and continuously diluting water in the steam boiler as required; on this basis, configuring a conductivity close loop control circuit to prevent the influences, such as water supply salinity fluctuation, flow rate measurement error, boiler bottom periodic pollutant discharge and the like, and coupling the both by an addition logic unit so as to form a feedforward-feedback complex control system. The invention can prevent various interferences, stably keep the salinity of the water in the steam boiler above the desired level, and realize the optimal energy-saving and emission-reducing effects by the least pollutant discharge amount.

An adaptive control system is disclosed. The control system can control uncertain dynamic systems. The control system can employ one or more derivative-free adaptive control architectures. The control system can further employ one or more derivative-free weight update laws. The derivative-free weight update laws can comprise a time-varying estimate of an ideal vector of weights. The control system of the present invention can therefore quickly stabilize systems that undergo sudden changes in dynamics, caused by, for example, sudden changes in weight. Embodiments of the present invention can also provide a less complex control system than existing adaptive control systems. The control system can control aircraft and other dynamic systems, such as, for example, those with non-minimum phase dynamics.

The invention provides a wind turbine low frequency aerodynamic noise suppression device based on a rotatable fairing and relates to wind turbines. The wind turbine low frequency aerodynamic noise suppression device based on the rotatable fairing is provided with a linkage rod, the fairing, a tower and a thrust ball bearing, wherein the upper end of the linkage rod is fixed to an engine room; the lower end of the linkage rod is embedded into the fairing, and the fairing is installed on the tower; when the engine room rotates, the linkage rod drives the fairing to rotate synchronously, and the tailing edge of the fairing is made to be aligned with an engine room all the time; a structure with two symmetrical and combined parts is adopted in the fairing, and the tail end of the fairing is firmly and fixedly connected; and the front end of the fairing is firmly and fixedly connected with the rotating end of the thrust ball bearing, and the fixed end of the thrust ball bearing is fixed to the tower. By the adoption of the rotatable fairing, the strength of the wake flow karman vortex street of the tower is reduced, the speed loss of the airflow is reduced, and the effect of reducing low frequency aerodynamic noise of a wind turbine is achieved; the structure is simple, and the implementation is easy; the periodical change acting force generated by dropping of a tailing vortex of the tower of the wind turbine can be evidently reduced, and therefore the damage caused by vortex-induced vibration is reduced; and a complex control system is avoided.

On the basis of the inverter-side current feedback control strategy, the invention presents a multi-inverter micro-grid harmonic resonance suppression method based on adaptive virtual impedance remodeling. The method includes a virtual impedance remodeling unit, a parameter adaptive adjustment unit and a grid impedance online detection unit. The virtual impedance remodeling unit can improve the output impedance characteristics of grid-connected inverters and inject certain damping components into a micro-grid. The parameter adaptive adjustment unit adaptively adjusts the control parameters ofthe virtual impedance remodeling unit and a current regulating controller according to the impedance parameters of the grid to maintain the stability of the system. The grid impedance online detectionunit provides the equivalent impedance of the grid as the input of the parameter adaptive adjustment unit. The method improves the characteristics of the current loop, and enables inverters to maintain stability under various grid impedance conditions. The method can solve the problems of complex control system, fixed control parameters and low efficiency of the regulation process in the existingmulti-inverter micro-grid system.

The invention provides an energy recycling system by using anti-surge air escape of a gas turbine of an integrally integrated turbine generator set; and the anti-surge air escape energy recycling system of the gas turbine comprises an intake subsystem, a turbine power generation subsystem and an exhaust subsystem. The system performs the energy recycling for the anti-surge air escape of the gas turbine, improves the economy of an air escape anti-surge measure, adopts a pressure buffer device to improve the working efficiency of the turbine generator set and the recovery effect, uses the recovered anti-surge air escape energy for intake cooling of an air compressor, and reduces the power consumption of the air compressor; the integral turbine generator set needs no complex control system; the power loss caused by bearing friction is reduced; the power density of a rotating shaft is higher; the size of the set is smaller; a permanent magnetic motor rotor is arranged on the rotating shaft, and shares the same rotating shaft with a turbine rotor; speed reducing and connecting mechanisms in middle are reduced; and the mechanical efficiency is higher.

The invention relates to an eddy current sensor type automatic weld tracking control method, which comprises a welding execution unit and a welding control unit, wherein the welding execution unit comprises a welding power supply and a welding gun, the welding control unit comprises eddy current sensors, a preprocessor, a welding tractor and a cross slider, and the preprocessor is provided with a signal processing circuit, an A/D conversion circuit, a singlechip processing circuit and a drive control circuit. After being preprocessed by each circuit in the preprocessor, the input current of the eddy current sensor arrives at the head coil impedance Z of the eddy current sensor, the output of a voltage signal U is generated according to the variation values of the measured value of the coil and the distance D between metal plates, and thereby automatic weld tracking control is realized according to the linear relation between U and D in the process of welding. The method overcomes the defects of the usage of the conventional weld tracking sensor, such as complex control system, complex operation, low control precision, large size, high noise, easy abrasion, high cost and narrow application range; and the method is applicable to the automatic weld tracking of an automatic welding process control system.

The invention relates to the technical field of sensors, in particular discloses a method and a device for realizing the purpose of binding the positions of CAN bus sensors. The method comprises the following steps: sequentially controlling a plurality of sensors to be accessed to a CAN bus network, wherein the CAN data frame of each sensor has corresponding characteristic identification, and the characteristic identification of the CAN data frame of each sensor is unique in the whole CAN bus network; receiving the CAN data frame sent by each sensor in the accessing process of each sensor; acquiring the characteristic identification of each CAN data frame; and establishing the binding relation between each sensor and each installing position corresponding to the currently binding position according to each characteristic identification. The invention can be used for automatically establishing binding relation between a plurality of CAN bus sensors and each of installing positions on one CAN bus, thereby meeting the requirement for applying CAN bus sensors in a complex control system.

The invention discloses a method and system for generating quadruplicated frequency optical millimeter waves based on stimulated Brillouin scattering effect. The method comprises the steps that the beat frequency of Stokes light and pump light produced by Brillouin scattering is used as a drive signal of a Mach-Zehnder modulator to modulate output light of a laser device and form a self-starting feedback loop; the amplification effect of Brillouin scattering is utilized to amplify a negative first-order sideband and restrain a positive first-order sideband; the intensity of the Stokes light and corresponding millimeter wave beat frequency are further enhanced, so that modulation depth is increased, and then the amplitude of positive and negative second-order sidebands is enhanced; the optical millimeter waves which are four times of Brillouin frequency shift fB are produced through a wavelength interleaver in a separated mode and output. According to the method, an RF source and a complex control system are not required, and a 4fB optical millimeter wave signal can be produced only through the Mach-Zehnder modulator, the wavelength interleaver, a nonlinear medium segment, a photoelectric detector and an RF amplifier. The method and system for generating the quadruplicated frequency optical millimeter waves have the advantages that stability is high, multiple frequency efficiency is high, and device cost is low.

The invention relates to a method for realizing hybrid programming by embedding a high-level language into a ladder diagram. In the method, a high-level language program taken as a module is inserted into the ladder diagram, and the inserted grogram module is stored in a file in a function type. The high-level language program file and a machine instruction code generated by the ladder diagram program are compiled into an executable file to be downloaded on a PLC (Programmable Logic Controller). In running, the high-level language program module is called from a machine instruction generated by the ladder diagram program so as to execute the high-level language program module. By embedding the algorithm module compiled by the high-level computer language in the ladder diagram, the method solves the problem that a complicated algorithm is difficult to realize; and by utilizing the advantages of stability and reliability of the ladder diagram, the development efficiency of a complicated control system is enhanced, and the aim of enhancing the functions of the ladder diagram can be realized by embedding an intelligent algorithm at the same time.

The invention discloses a rotating load simulation device. Four guide rods are evenly distributed on the circumference of a rotating shaft R, heavy blocks with the equal mass are installed on every two guide rods symmetric about the rotating shaft, the rotating inertia relative to the rotating shaft is simulated through the mass sum of the heavy blocks on the four guide rods, and the product of inertia under the dynamic unbalance condition is acquired by adjusting the distances between the combination mass centers of the heavy blocks on the symmetric guide rods; the friction moment of a shafting is simulated by controlling excitation currents of a magnetic powder brake. No complex control system is adopted in the rotating load simulation device, the structure is simple, inertia characteristics and friction moment are adjusted conveniently, simulation accuracy is high, and universality is good.

The invention discloses an automatic cooling type metal plate stamping device. The automatic cooking type metal plate stamping device comprises a rack, at least two stand columns, a top plate, an oil cylinder, a sliding plate, an upper die holder, an upper die, a lower die holder, a lower die, a guide rod, an extension rod, a pressing rod, a cooling liquid box, a first one-way valve, an outer box body, a piston, a spring, a second one-way valve, a nozzle and a controller; a part to be machined is placed in the lower die, the controller controls the oil cylinder to push the sliding plate to move downwards, the upper die is driven to move downwards, meanwhile, the pressing rod fixedly connected with the sliding plate through the extension rod moves downwards, the pressing rod pushes the piston to move downwards, and therefore cooling liquid in the outer box body is sprayed out through the nozzle; after stamping is completed, the oil cylinder returns, the spring pushes the piston to move upwards, negative pressure is generated in the outer box body, and cooling liquid in the cooling liquid box is pumped into the outer box body through the first one-way valve and used for being used in next-time stamping; and the device is simple in structure, mechanical cooling design is achieved, a complex control system is not needed, the cost is greatly reduced, intermittent cooling liquid is sprayed, and the use amount of the cooling liquid is saved.

The invention relates to a test device used for simulating collisions of a cell pack bottom of an electric automobile. The test device comprises a device body. The device body comprises a collision trolley and a cell pack fixing seat. The test device is characterized in that the test device also comprises a collision component connected with the front end part of the collision trolley, a ramp under a cell pack, a trolley traction rail longitudinally arranged on the ground, and trolley buffering components which are arranged between the collision trolley and the cell pack fixing seat and on two sides of the middle part of the trolley traction rail. According to the invention, the process that the cell pack bottom suffers the collision from the bottom of the automobile in a real automobile moving process can be quite truly and precisely simulated; fixation of different sizes of cell packs can be achieved; collision tests for different positions of the cell pack bottom can be performed according to experiment requirements; the test device is highly adaptive and universal without complex control systems, and operates stably and reliably; and the whole device can be disassembled and assembled repeatedly, and is easy to reconstruct and maintain, high in intensity and low in cost and risks in the aspect of the real automobile collisions.

The invention discloses an overdrive system control allocation method based on a geometrically intuitively built reachable set. Through selecting parameters, then the parameters are eliminated to obtain a plane general equation, the dimension of a control efficiency matrix is reduced, and thus the amount of calculation is greatly reduced in constructing the reachable set. The method is intuitiveand easy to understand, accordingly the necessary and sufficient conditions for vertices, facets and edges of the reachable set can be given, and in a complex control system such as a multi-degree-of-freedom manipulator, the amount of calculation of constructing the reachable set can be reduced to an acceptable range by using the method.

The invention discloses a plate stretcher stretching cylinder synchronous energy-saving hydraulic complex control system. The system comprises a first large flow electro-hydraulic directional valve, a second large flow electro-hydraulic directional valve, a first small flow high-frequency response proportional valve, a second small flow high-frequency response proportional valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a fifth one-way valve, a sixth one-way valve, a seventh one-way valve, a first proportional variable displacement pump, a second proportional variable displacement pump, a constant pressure variable displacement pump, a first electromagnetic overflow valve, a second electromagnetic overflow valve and a third electromagnetic overflow valve. According to the system, preliminary synchronization of main oil ways of two stretching cylinders provided with displacement sensors is achieved through the proportional variable displacement pumps, and high-precision synchronization is fast achieved through the high-precision high-frequency response proportional valves. The plate stretcher stretching cylinder synchronous energy-saving hydraulic complex control system has the beneficial effects that the system is low in cost, high in efficiency and small in heating amount during high-speed stretching.

The invention relates to a mechanically-pumping compressed gas foam fire-extinguishing method, and mainly solves the problems of inaccurate mixing ratio measurement, complex control system and high energy consumption in the prior art. The problem is solved well through adopting the technical scheme that the mechanically-pumping compressed gas foam fire-extinguishing method is adopted, fire is extinguished through a mechanically-pumping compressed gas foam fire-extinguishing device, and the mechanically-pumping compressed gas foam fire-extinguishing device comprises a normal-pressure foam concentrate storage tank, a charge port, a discharge port, a fire-fighting pressure water source, a washing debugging pipeline, a water turbine, a foam generator, a foam conveying pipeline, a foam spray gun, a foam concentrate pump and a water-foam concentrate selection valve. The mechanically-pumping compressed gas foam fire-extinguishing method can be used in fire-fighting fire extinguishment.

The invention discloses a directed conveying mechanism for electronic insulating parts. The directed conveying mechanism comprises a feeding conveying track and the stepped electronic insulating partsconveyed on the feeding conveying track; the tail end of the feeding conveying track is connected with a horizontal pushing groove; a pushing plate is glidingly arranged inside the horizontal pushinggroove; one end of the pushing plate is fixedly connected with a cylinder rod of an air cylinder; a pushing chamber is arranged at the other end of the pushing plate; a directed chamber is verticallyarranged on one side of the pushing chamber; and an inlet of the directed chamber is located on the pushing stroke of the pushing chamber and the pushing plate, so that the electronic insulating parts in the pushing chamber are pushed into the inlet of the directed chamber through the pushing plate, and the electronic insulating parts entering the pushing chamber slide down along the side wall ofthe directed chamber under the effect of gravity. By the aid of the directed conveying mechanism, directed conveyance can be performed on the stepped electronic insulating part structures, overturning and directing of the electronic insulating parts can be realized by the aid of the gravity and the conveying structure, no complex control system is required, the structure is simple, the cost is low, and the reliability is high.

The invention discloses a fluid flow measuring method. The method comprises the following steps of collecting parameter signals of fluid to be measured, and obtaining flow velocity data; acquiring a variable cross-section signal of a pipeline through which the to-be-measured fluid flows, and acquiring variable cross-section data; obtaining the area of a variable cross section according to the variable cross section data and original cross section parameters of the pipeline; and obtaining the volume flow of the fluid according to the flow velocity of the fluid and the area of the variable cross-section, or obtaining the mass flow by combining the density of the to-be-measured fluid. By using the method, the problems of high cost, complex control system, large occupied space and the like inthe prior art are solved, the measuring range ratio is increased, measuring pipelines and sensors are reduced, the cost, the control system and the occupied space are reduced, and the maintenance costis reduced.

The invention discloses a mulberry picking machine. The mulberry picking machine comprises a machine frame, a transmission mechanism, a grabbing mechanism, a collecting mechanism and a stabilizing mechanism, wherein the collecting mechanism is arranged at the front side of a main body of the machine frame, the transmission mechanism is arranged at the upper part of the rear side of the main body of the machine frame and is connected with the grabbing mechanism, and stabilizing components are respectively arranged at the head and tail ends of the machine frame so as to form the stabilizing mechanism; and universal wheels are arranged at the bottom of the machine frame. The mulberry picking machine disclosed by the invention is high in practicability, can be used for efficiently picking mulberries and meets the requirements on picking; the mulberry picking machine is free of a complicated control system, the operation is simple, and training is not required, so that the mulberry picking machine is applicable to fruit farmers; the mulberry picking machine is small in size and can adapt to a variety of pavement conditions; and the labor intensity for people can be lightened, and the labor cost of production is reduced.

The invention provides a keyboard input method of a control system display control terminal. According to the method, small keyboard physical keys, user function interface soft keys of the display control terminal and a mapping module are included, and the method comprises the steps that when the small keyboard physical keys are pressed, a key-pressing event is triggered, when the key trigger time at two times is longer than 300ms, the mapping module reads tab information of a main interface, the pressed key value code is scanned, the soft keys corresponding to the pressed key value are analyzed through the mapping module, the key attribute is changed to be true from acquiescent false, a static value change event is triggered, and the corresponding function trigger is achieved. The keyboard input method has the advantages that the defect that due to the facts that the space size is restrained, and the number of the small keyboard physical keys is limited, the multifunctional operation requirement of a user for the control system display control terminal cannot be met is overcome, reuse and expanding of the small keyboard physical keys is achieved, and the real-time man-machine interaction of a complex control system is completed.

The invention relates to a design method of a two-dimensional braiding machine capable of braiding a special-section perform. Flat belt braiding spindle tracks are adopted; two flat belt braiding spindle tracks are spliced into an L, T or cross shape; by adjusting the number of total notches of all impellers on the flat belt braiding spindle tracks, the interference of spindles from different flat belt braiding spindle tracks at a track intersection is avoided; by adjusting the number of notches of individual impellers of the flat belt braiding spindle tracks, the interference of the spindles on the flat belt braiding spindle tracks after splicing at an intersection of every two adjacent impellers is avoided. According to the design method disclosed by the invention, one-time forming of a complex section braiding structure can be realized; in addition, complex mechanical structures such as a shifting fork and a track-changing turntable are not needed, no complex control system is needed, and high stability is realized.

A multi-channel DC motor control system based on an FPGA and a DSP is characterized by comprising a master control programmable logic device module, a digital signal processor module, a human-computer interaction interface, a CPU power supply module, an internal communication module, a first status indication module, an underlying drive module, a 10-channel DC motor module, a second status indication module, a high voltage power supply module, a sampling module, a control interface module and the like. The multi-channel DC motor control system based on the FPGA and the DSP is advantageous in that first, two adopted main control chips of an EP1C6Q240C8N and a TMS320F2812 in the system are widely used with high processing speed and are applicable to large complex control systems; second, by use of an integrated chip MC33886, the underlying drive module is highly integrated, and when the underlying drive module is compared with the previous way of driving a motor with a manually-built H-bridge in markets, reliability is greatly improved, implementation circuits are also significantly reduced and cost is dramatically reduced; third, the overall system is highly flexible and can control different numbers of DC units (with a voltage level at 40V or less) according to actual needs; and fourth, the system is small in size, high in integration and easy in adjustment.

The invention relates to an electric-field-type wireless power and two-way signal transmission system, and belongs to the technical field of nonelectrical contact power transmission. The electric-field-type wireless power and two-way signal transmission system comprises an energy transmission channel, a forward signal transmission channel and a backward signal transmission channel. The energy transmission channel includes a power transmission power source, an energy coupling mechanism, and a power receiving circuit. The forward and backward signal transmission channels each include a signal transmission power source, a signal coupling mechanism, and a signal receiving circuit. The energy transmission channel and the signal transmission channel operate separately through a common-mode differential-mode separation circuit. The electric-field-type wireless power and two-way signal transmission system can realize the synchronous transmission of the energy and a bidirectional signal. The energy channel and the signal channel do not interfere with each other. A wireless power and signal simultaneous transmission circuit designed by according to a common-mode power transmission and differential-mode signal transmission operating principle does not need an additional signal path and a complex control system. The coupled inductive common-mode differential-mode separation circuit compensates the coupling capacitor and simplifies a compensation network.