41results about How to "Improve decoupling ability" patented technology

A capacitive micromachined ultrasonic transducer (cMUT) has an acoustic decoupling feature. A cavity is introduced underneath the regular cMUT element, preferably in the substrate, to provide acoustic decoupling. Trenches are also introduced to separate the cMUT elements and to provide further acoustic decoupling. The acoustic decoupling feature may be used in both conventional membrane-based cMUT and the newer embedded-spring cMUT (ESCMUT). Exemplary fabrication methods are also described.

The invention provides an axial split-phase internal stator permanent magnet biased magnetic suspension switched reluctance flywheel motor comprising an external rotor, a flywheel and an internal stator. The external rotor is packaged at the internal side of the flywheel in a laminating way. An internal stator iron core and an external rotor iron core are divided into m segments along the axis according to the phase number. The internal side of each segment of external rotor is equidistantly provided with 12 rotor poles along the circumference. The internal stator iron core is provided with 8 narrow tooth main magnetic poles and 4 wide tooth suspension poles. Main pole control coils and suspension control coils are respectively wound on the narrow tooth main magnetic poles and the wide tooth suspension poles. The coils on each narrow tooth main magnetic pole are interconnected in series to form a main pole winding. Every two of the control coils on each segment of wide tooth suspension pole are connected in series so as to form two sets of suspension windings in an orthogonal direction. The size of the system can be reduced and the critical speed of rotation can be enhanced; the suspension supporting loss can be reduced and the operation efficiency can be enhanced; and the stator poles are separately provided with the suspension poles, the main magnetic poles and magnetic isolating rings so that the control algorithm can be simplified and the suspension performance and the decoupling effect can be enhanced.

The invention discloses a decoupling method of air vehicle pneumatic strong coupling to solve the technical problem that an existing robust decoupling control method of a high ultrasonic air vehicle is poor in decoupling effect. The technical scheme is that the decoupling method comprises the steps of first establishing a pneumatic torque coupling model, then defining pneumatic coupling evaluation criteria, then defining pneumatic coupling characteristics, setting pneumatic coupling decoupling conditions, and completing decoupling of air vehicle pneumatic strong coupling. Due to the fact that all coupling factors are reasonably divided and classified in the method, equivalent effect of coupling factors of a same type is realized, and the definition for evaluating and analyzing the pneumatic coupling evaluation criteria-coupling degrees is introduced. According to the influences on air vehicle characterizes from different coupling degrees, coupling effects are divided into strong coupling and weak coupling, and decoupling methods-coupling ignoring and coupling equivalent conversion under pneumatic weak coupling and pneumatic strong coupling are refined, and therefore the decoupling effect of the air vehicle pneumatic strong coupling is improved.

The invention discloses a bearingless synchronous reluctance motor decoupling control system and a construction method thereof, which are used for suspension and speed control. When the system is used, an extended SVPWM (space vector pulse width modulation) inverter is firstly constructed to supply power for a motor torque winding and a suspension winding; then a magnetic field oriented decoupling model is constructed to realize the decoupling control of the motor before the magnetic field oriented decoupling model is concatenated to the extended SVPWM inverter; and finally an extended closed loop regulator is designed to realize high-performance closed-loop control on the system. According to the system provided by the invention, the extended closed loop regulator and the magnetic field oriented decoupling model can be realized by using a digital signal processor (DSP); besides, the system also comprises a displacement and current sensor and a photoelectric decoder which are used for acquiring current, displacement and a rotor location angular signal required by analysis and control of the DSP. The system and the method provided by the invention are used for the decoupling control of the bearingless synchronous reluctance motor with simple algorithm and excellent performance.

The invention discloses a multi-dimensional force sensor correction and decoupling method based on a particle swarm optimization BP neural network. The BP network is optimized by using a global searchoptimal characteristic of PSO, the defect that the BP algorithm is trapped in local optimum in learning is avoided, and the mapping relationship of calibration data of a conversion channel is captured, so that the decoupling model has good convergence and adaptability, and the multi-dimensional force sensor has good measurement precision. By establishing the neural network model, the limitation of multi-coupling and highly nonlinear relationship of force or moment of each dimension is broken through, the decoupling capability of the multi-dimensional force sensor is improved, and the practicability of the multi-dimensional force sensor is improved; the BP network is improved and optimized by utilizing the global search optimal characteristic of the particle swarm algorithm, so that the defect that the BP algorithm is trapped in local optimum in learning is avoided, and the model has good convergence and adaptability and has good generalization ability. Compared with a traditional method, the multi-dimensional force sensor decoupling method provided by the invention has better decoupling precision and better decoupling performance.

The invention provides a service framework construction method and system based on a plug-in engine, at least one process is constructed, each process is loaded with at least one plug-in, a local forwarding routing table, a network forwarding routing table, a virtual base class and an entity class are constructed at the same time, wherein the entity class inherits from the virtual base class; then an interface parameter containing process or plug-in sending information is provided in the entity class, and a service parameter serving as an information carrier is provided in the virtual base class, thereby realizing communication connection between the process and the plug-in according to the interface parameter; the local forwarding routing table or the network forwarding routing table is selected according to the service parameters to realize transmission of the information carrier between the plug-in and the process. According to the method and the system, service requirements can be quickly responded, the development efficiency is improved, the scalability of the system is enhanced, a framework mode is beneficial to dynamic capacity expansion, original service functions are not influenced, distributed or cluster deployment can be realized, and the lateral expansion capability of services is enhanced.

The invention relates to an elastic wave direct envelope inversion method based on rock physical constraints. According to the method, the longitudinal wave velocity structure of a strong scattering medium is obtained through wave field mode decomposition and elastic wave direct envelope inversion, and the transverse wave velocity structure of the medium is calculated according to a rock physicalrelation. The method comprises the following steps of: firstly, performing wave field mode decomposition on an elastic wave field to obtain a longitudinal wave field, and obtaining a longitudinal wavevelocity gradient through the cross-correlation of forward propagation longitudinal waves and an accompanying longitudinal wave field; secondly, the updating amount of the transverse wave velocity can be calculated according to the rock physical relation, and performing updating to obtain large-scale longitudinal and transverse wave velocity structures of the strong scattering medium; and finally, taking an elastic wave direct envelope inversion result as an initial model, and performing elastic wave full-waveform inversion to obtain the high-precision longitudinal and transverse wave velocity model of the strong scattering medium. The longitudinal and transverse wave velocity decoupling effect of the strong scattering medium is improved, the high-quality longitudinal wave velocity structure is obtained, and the rock physical constraints are applied in inversion, so that the transverse wave velocity structure of the strong scattering medium is obtained.

The invention discloses a vehicle multi-dimensional force sensor decoupling method based on a PSO optimized LSSVM, which comprises the steps of 1, acquiring calibration data of a vehicle multi-dimensional force sensor; 2, building a least square support vector machine model for decoupling of the vehicle multi-dimensional force sensor; and 3, optimizing and training a PSO algorithm to obtain an optimal vehicle multi-dimensional force sensor decoupling model. According to the invention, the least square support vector machine decoupling model is established, and the PSO (particle swarm optimization) is used to globally search the optimal characteristic to optimize the parameters of the least square support vector machine, so that the least square support vector machine decoupling model has good convergence and adaptability, and the multi-dimensional force sensor has good measurement precision to meet the actual application requirements.

The invention discloses a locomotive braking system for realizing automatic driving and an implementation method thereof. The locomotive braking system comprises a braking display module, a braking controller, an automatic driving module and a braking control module. The braking display module is used for outputting state information of the braking system; the braking controller is used for outputting brake force brake position information; the automatic driving module is used for carrying out data information interaction with a locomotive automatic driving control center, detecting data information output by the braking control module and outputting an automatic driving operation sign and a first target pressure value; and the braking control module is used for analyzing the brake force brake position information, obtaining a second target pressure value, outputting an actual target pressure value according to the automatic driving operation sign and the first target pressure value, controlling a braking cylinder to work and sending collected state information of the braking system to the braking display module. The locomotive braking system has no additional influence on normal operation of an original braking system, can be compatible with the original braking system without hardware upgrading, has high decoupling performance and high adaptability, and improves feasibility,reliability and stability of automatic driving of the braking system.

The invention provides a control method of a BOPP (Biaxially-oriented Polypropylene) biaxial stretching system. With regard to an arbitrary three-motor subsystem in a stretching section of the system,the system comprises a prepositioned shaft, a first tension roller, a main driving shaft, a second tension roller and a post-positioned shaft; two distributed controllers are used for controlling, wherein the first controller is used for controlling a prepositioned shaft motor and a main driving shaft motor and the second controller is used for controlling the main driving shaft motor and a post-positioned shaft motor; meanwhile, the first controller and the second controller are used to share one part of output through superposition of control factors a and b, so as to control the main driving shaft motor. According to the method provided by the invention, the two continuous controllers are used share one part of input and output through superposition of the control factors, so that thedecoupling capability of speeds and tension of the system can be remarkably improved; the subsystem is expanded into a multi-motor winding system in a biaxial stretching process; meanwhile, a thin film longitudinal and transverse thickness control model is also designed, so that synchronous and accurate control on the speeds, the tension and the speed of a stretching process is realized.

The invention provides an active-disturbance-rejection control structure and a control method for a binary rectification process, and belongs to the technical field of energy-saving control of a chemical rectification process. The technical problems that various external disturbances exist in the existing rectification process, so that various states in the rectification tower are deviated, the process energy is wasted, and meanwhile, the product quality is influenced are solved. According to the technical scheme, the control structure for the product purity and quality of the binary rectifying tower comprises four control loops, namely a condenser liquid level control loop, a reboiler liquid level control loop, a tower top light component product concentration control loop and a tower bottom light component product concentration control loop; the control method comprises the step of realizing control of the four control loops by designing the four active-disturbance-rejection controllers. The control method has the beneficial effects that the degree of dependence of the control method on a mathematical model in the rectification process is low, the set value tracking of the concentration of the products at the tower top and the tower bottom can be realized, the purity of the products is ensured to be slightly influenced under the condition that the feeding flow or components are greatly disturbed, and the method has relatively strong robustness and stability.

The invention discloses an AR-HUD-based test method for vehicle-mounted target tracking effect. Random jitter caused by real vehicle on road is simulated through a vibration table, and test verification is carried out on the problems of adaptation between augmented reality head-up display equipment ARHUD and a driver view image in a real vehicle on road pitching motion state. According to the invention, joint debugging can be carried out in an indoor darkroom, direct setout under the condition of basic function deficiency is avoided, the debugging efficiency is greatly improved, and the subjective test time cost is estimated to be reduced by more than 80% compared with that of the on-board debugging. In the AR-HUD development process, the problems of bumping, driver eye box deviation and the like in the moving process of a real vehicle are solved, separation from the real vehicle is achieved, the decoupling performance is high in the development and debugging process, and the method does not depend on objective conditions such as vehicle types and road environments.

The invention provides a universal description language data system for directed acyclic graph type automatic task flow. The universal description language data system comprises a Step definition layer, a Workflow definition layer and a Template definition layer, The Step layer is description of a single task, and information such as names, types, documents and parameters of input and output itemsneeds to be declared specifically for input and output declarations of a docker mirror image or other actuators; the Workflow layer is a workflow composed of one or more Steps, the dependency topology of the Steps needs to be defined, and shared parameters can also be defined; the Template layer is based on a Workflow definition, and the template is used for presetting parameters, explaining supplementary parameters, and defining an inspector or a data source. The data center and a task execution tool are used, and a programming language needs to be used for achieving a corresponding tool. Adata center needs to store each definition document and indexes the definition documents to the corresponding documents through reference links, and an interpreter needs to read all definition contents and assign corresponding data to a definition structure according to the reference links.

The invention discloses a decoupling control method for a control moment gyroscope, and relates to the technical field of control of control moment gyroscopes. The decoupling control method for the control moment gyroscope comprises the following steps: according to initial conditions and constraint conditions of a control moment gyroscope system, performing reversibility analysis on the system by adopting an Interactor algorithm, selecting sample data points in a normal working interval of the system, performing algorithm training based on an RBF neural network, and finally performing decoupling control on the control moment gyroscope. And connecting the trained inverse system with an original system in series to form a new equivalent decoupling system, constructing a linear expansion state observer to estimate residual terms of an equivalent system, and combining the linear expansion state observer with a PD controller to form a closed loop. The invention aims to design a decoupling control algorithm for a control moment gyroscope, the problem that solving is difficult by adopting a mathematical analysis method is avoided, residual terms of an equivalent system after decoupling are estimated through a linear expansion state observer, the influence of neural network approximation errors on decoupling performance is reduced, and the decoupling performance of the control moment gyroscope is improved. And the dynamic performance of the control system is further optimized.