306 results about "Unit model" patented technology

A robot simulation apparatus (10) capable of creating and executing a robot program includes a virtual space creating unit (31) for creating a virtual space (60), a workpiece model layout unit (32) for automatically arranging at least one workpiece model (40) in an appropriate posture at an appropriate position in a workpiece accommodation unit model (24) defined in the virtual space, a virtual camera unit (33) for acquiring a virtual image (52) of workpiece models existing in the range of a designated visual field as viewed from a designated place in the virtual space, a correcting unit (34) for correcting the teaching points in the robot program based on the virtual image, and a simulation unit (35) for simulating the operation of the robot handling the workpieces, and as a result, interference between the robot and the workpieces can be predicted while at the same time accurately determining the required workpiece handling time.

Disclosed herein are an apparatus and method for processing the manipulation of a three-dimensional (3D) virtual object. The apparatus includes an image input unit, an environment reconstruction unit, a 3D object modeling unit, a space matching unit, and a manipulation processing unit. The image input unit receives image information generated by capturing a surrounding environment including a manipulating object. The environment reconstruction unit reconstructs a 3D virtual reality space. The 3D object modeling unit models a 3D virtual object that is manipulated by the manipulating object, and generates a 3D rendering space. The space matching unit matches the 3D rendering space to the 3D virtual reality space. The manipulation processing unit determines whether the manipulating object is in contact with the surface of the 3D virtual object, and tracks the path of a contact point and processes the motion of the 3D virtual object.

The invention provides an integral optimization method and system for an automatic power generation system of a coal-fired unit. The method comprises the steps of carrying out control valve flow characteristic test and adjustment according to control valve flow characteristic parameters, carrying out combustion optimization on a wind and smoke subsystem and a combustion subsystem, carrying out a fuel disturbance test and a control valve disturbance test to generate typical test parameters, using the typical test parameters to generate a dynamic unit model, constructing a coordinating simulation system according to a coordinating controller and the dynamic unit model, using the dynamic unit model to optimize a feedforward controller and carry out simulation verification on the coordinating simulation system simultaneously, carrying out DCS configuration and parameter debugging in the simulation system, carrying out a constant-voltage slide-voltage variable-load test and a constant-load voltage-transformation test to generate technical indexes of the variable-load rate, the variable-load accuracy, variable-load response time and the main steam pressure accuracy, judging whether the technical indexes meet the preset technical indexes, and if on yes judgment, carrying out a slide-voltage variable-load test to enable the coal-fired unit to operate normally.

A low-bitrate encoding system includes: a time-frequency transform unit transforming an input time-domain audio signal into a frequency-domain audio signal; a frequency component processor unit decimating frequency components in the frequency-domain audio signal; a psychoacoustic model unit modeling the received time-domain audio signal on the basis of human auditory characteristics, and calculating encoding bit allocation information; a quantizer unit quantizing the frequency-domain audio signal input from the frequency component processor unit to have a bitrate based on the encoding bit allocation information input from the psychoacoustic model unit; and a lossless encoder unit encoding the quantized audio signal losslessly, and outputting the encoded audio signal in a bitstream format. Using the low-bitrate encoding system, it is possible to effectively compress data at a low bitrate, and thus to provide a high quality audio signal.

A method for a functional test of a wind turbine generator plant which comprises the following procedural steps: a control unit for the wind turbine generator plant reads in actual values from at least one structural part of the wind turbine generator plant and generates control signals for actuators of the wind turbine generator plant, a simulation unit has at least one input and at least one output as well as one or more mathematical models which depict the behaviour of one or more structural parts of the wind turbine generator plant, the control signals are applied to the input of the simulation unit and the modeled actual values of the models on the structural parts are applied to the output of the simulation unit, wherein the actual values of the simulation unit are applied to the input of the control unit and the control signals of the control unit are applied to the input of the simulation unit; the simulation unit models the actual values of the structural parts resulting for the control signals applied, for certain initial conditions.

The invention researches the substantive characteristics of material deformation to aim at the practical problem of measuring real stress-real strain and discloses a real stress-real strain calculating model and a practical testing system: 1, based on the analysis on the deformation of a tension specimen, taking a unit body the special part of which is provided with characteristics as the object for the stress-strain analysis, building a unique full-deformation unit model, firstly solving the theory analysis problem of real stress-real strain, establishing a theory foundation and building a novel real stress-real strain calculating formula: Sigma i is equal to 4Fi/Pi d<2>I and Epsilon is equal to (d<2>0/d<2>i) minus 1; 2, adopting a machine visual technology and an image processing method to develop a practical software system and a practical hardware system that are compatible with the machine visual technology and the image processing method, and realizing the direct non-contact real stress-real strain measuring in real meaning; 3, the testing system includes a light source (1), CCD camera (2), an image acquisition card (3), a data acquisition card (4) and a material testing machine (5); 4,the software includes image capturing program, load data acquisition program and comprehensive calculation analysis program.

A lidar three-dimensional imaging system based on a virtual instrument comprises a three-dimensional scene modeling module, a lidar testing system simulation environment modeling module, a full-waveform signal processing module and a three-dimensional reconstruction module. The three-dimensional scene modeling module comprises a three-dimensional model loading element used for setting background colors, visual angle control, illumination, a projection mode, a display model and other basic scene projects. The lidar testing system simulation environment modeling module comprises four modeling sub-modules which are a laser pulse model, an atmospheric transmission model, an object interaction model and a receiving unit model. The laser pulse model is used for simulating a laser source according to the wavelength, pulse width, energy and other characteristics of a laser. The atmospheric transmission model is used for simulating a tested atmospheric environment, so that a noise model is generated for acting on the laser. The object interaction model is used for simulating effects of the laser and a detected object, and the effects comprise mirror reflection, diffuse reflection, surface reflection and speckles. The receiving unit model is used for simulating detector noise and amplifier noise which are generated after sensing.

The present invention discloses a turbine-boiler coordination control method for thermal power unit. The problems of object hysteresis and coupling of systems exist in the current turbine-boiler coordination control. The technical scheme of the present invention is: firstly, by means of an advanced estimation about coal amount, overcoming the combustion hysteresis so as to improve the response rate of the load; secondly, according to the unit model, designing a reasonable pressure setting curve to make coal amount in accordance with an adjustment valve so as to realize a dynamic decoupling and make a coordination control system of the unit fully utilize the thermal storage capability of the unit and track the desired value rapidly and accurately; thirdly, reasonably adjusting a PID controller parameter in a stable state to guarantee the stabilization of the load and main steam pressure. The model-based dynamically decoupling turbine-boiler coordination control method for thermal power unit provided by the present invention is advantageous in overcoming coal combustion hysteresis, improving the response rate of the load, realizing the objective of dynamic decoupling and making the adjustment valve control the pressure meanwhile guaranteeing the response quality of the load.

The invention discloses a method for detecting the position, posture, and three-dimensional profile of a vehicle from traffic images, which comprises the following steps: carrying out image acquisition on traffic scenes by a digital camera; detecting the position, posture, and three-dimensional profile of a vehicle by a symbolic activity unit model; processing possible occluded phenomenon of the vehicle; and finally, calculating the actual size of the three-dimensional profile of the vehicle according to the calibration results of the digital camera and the identified profile of the vehicle. The invention has good adaptability to various common shooting angles in a traffic monitoring system, and by using the method, the three-dimensional profile of the vehicle can be observed and detectedfrom different angles, therefore, the invention can be used in vehicle recognition, plate-number identification, and vehicle behavior judgment.

The invention provides a calculation method of the bearing capacity of a reinforced wall plate and belongs to the field of strength analysis of aircraft structures. According to the technical scheme, the calculation method is an axial compression loading action based calculation method of the effective width of buckling of a skin. Stiffness reduction is performed through modification of the cross section area and the moment of inertia of a stringer in a finite element model which is formed by plate beam units after the buckling of the skin is produced, stress analysis of a structure is performed by a linear iteration solution method of load loading steps, comparison is performed on the working stress of the stringer in a calculation result and the allowable limiting stress of a stringer and skin combined structure, the allowable limiting stress serves as a damage standard and is solved based on an engineering method, and accordingly the bearing capacity of the structure is obtained. Compared with the traditional full housing model, a calculation method model is a plate beam unit model, the geometric nonlinearity and contact problem solution which is large in time consumption and difficult to converge is replaced by the linear solution, and accordingly the modeling time consumption is small, the calculation speed is high, and the requirements for the professional quality of the computer hardware and analysis staff are low.

The invention provides a defrosting control method with the optimal comprehensive performance of an air heat source pump as a target. The defrosting control method comprises the steps that when a unit is started, the evaporation pressure/temperature, the inlet air temperature and the inlet air humidity of a finned tube exchanger and the condensation pressure/temperature and hot water side inlet temperature and flow of a condenser are detected, performance parameters of different running periods are calculated through a unit model in a simulation manner, and the optimal unit frosting time under the work condition is obtained according to the calculated maximum value of the performance evaluation coefficient COPc of the different running periods; when the unit carries out heating and runs to the optimal frosting time, defrosting is started; and the temperature of bottom fins of the finned tube exchanger is detected, and when the temperature of the bottom fins of the finned tube exchanger reaches the set value, the unit stops defrosting, and the heating mode is recovered. According to the defrosting control method, the running work condition and the running state of the unit are detected in real time, the growth condition of a frosting layer of the finned tube exchanger can be accurately judged through the unit model, the optimal frosting time of the unit is updated, and the unit can adapt to any work condition to efficiently run.

The invention relates to an airplane complex construction member roughing automatic building method. The method includes the main implementation process that: (1) characteristic basic information is acquired; (2) roughing characteristic is optimized by layering; (3) roughing initial geometric guide line is generated; (4) the roughing geometric guide line is corrected; (5) roughing unit model is defined and built, various parameter information is integrated, so as to be convenient for creating of processing operation and parameter setting. The invention is mainly used for automatically building roughing unit by layering after characteristic identification and cutter selection, so as to realize automatic generation of roughing processing operation and automatic acquiring and setting on the required geometric parameters, processing parameters, cutter parameters and transition macro parameters, further greatly reduce work load of man-machine interaction program, obviously shorten programming period and improve numerical control programming efficiency and processing efficiency.

An input signal is supplied to a loudspeaker-room-microphone system having a transfer function and that provides an output signal. An adaptive filter unit models the transfer function of the loudspeaker-room-microphone system and provides an approximated output signal, where the output signal and the approximated output signal are subtracted from each other to provide an error signal. The modeling of the transfer function of the loudspeaker-room-microphone system in the adaptive filter comprises transforming the input signal and the error signal from the time domain into the spectral domain; delaying of the input signal in the frequency domain to generate multiple differently delayed input signals in the frequency domain; adaptive filtering of each one of the multiple differently delayed input signals in the frequency domain according to the error signal in the spectral domain; summing up of the filtered differently delayed input signals in the frequency domain to generate the approximated output signal in the frequency domain; and transforming the approximated output signal from the spectral domain into the time domain.

A method for building robust model predictive controller universally applicable is presented based on the innate process characteristics independent of the method of control actuation. The method of universal MPC design permits proper configuration of requisite regulatory control loops for measured and unmeasured disturbance rejections consistent with the underlying innate process characteristics and their embedding within the overall process unit model predictive controller. The method of universal MPC design requires that manipulated variables process value based model (PV-based models) be used in control and optimization in place of the customary set point based models (SP-based models) or control output based models (OP-based models). The PV-based models are devoid of the manipulated variables regulatory controllers response and tuning. Based on the PV-based models, an alternate method of MPC called PV-based MPC is presented that is most robust and adaptable of possible three types of MPC. Based on the universal MPC design, the prior art MPC can be adapted to improve its robustness at or near control valve saturation.

The invention relates to an on-site programmable device FPGA logic unit model and a general bin packing algorithm thereof. The module is analyzed and modeled according to realizable subscriber circuit logic function type in logic unit, and can be divided into three stages according to mutual driving case, the first stage is a searching table, the second stage is a special device, and the third stage is a sequential device, and the model can widely describe present commercial FPGA chip logic unit structure. Based on the module, the invention provides a general logic unit bin packing algorithm from bottom to top, which respectively establish user-defined logic devices for a device using the special device as core, a device using the sequential device as core and a device using the searching table as core in subscriber circuit, and carries out bin packing for the self- established devices by employing gain function calculation. The algorithm is a universal algorithm for treating bin packing problem of various logic units, has wide representation, versatility, practicality and excellent time spending performance, and is suitable for large-scale subscriber circuit.

A dynamic load tracking central air conditioner cold source global optimum energy-saving control method relates to the technical field of air conditioning. The method aims at achieving the effect of saving operation energy consumption of the central air conditioner. The method includes first building a water chilling unit model, a water pump model and a speed changing cooling tower model of the central air conditioner, collecting working condition samples of the central air conditioner, estimating model coefficients of each model according to the collected working condition samples, building a system optimizing model of the central air conditioner according to the water chilling unit model, the water pump model and the speed changing cooling tower model, utilizing the system optimizing model to calculate the theoretical working conditions of water chilling units, water pumps and cooling tower fans in the operation process of the central air conditioner and adjusting the water chilling units, the water pumps and the cooling tower fans according to a calculation result. The method is suitable for being matched with a central air conditioner system in use.

Disclosed is a diagnostic method of space gridding structure node bolt loosening injury. The diagnostic method of space gridding structure node bolt loosening injury comprises that a bolt ball node is modeling elaborately and a structural combination unit model is set up. The diagnostic method of space gridding structure node bolt loosening injury is divided into a plurality of substructures and is numbered according to a way of geometric position continuity according to composition characteristics of the space gridding structure. A structure testing point is optimizely arranged in a sensor mode and sensitivity analysis of a rod piece is carried out by frequency. Numerical value of bolt loosening injury is simulated. A training sample, an input parameter and an output parameter of a neural network is confirmed. An injury sample is input to a generalized regression neural network (GRNN) network B which is training completed. The output is an injury index of the node, namely the injury position is positioned to the existing node. The number of a training sample when the injury is accurately positioned can be greatly reduced. Practicality that the space gridding structure node bolt loosening injury is diagnosed by taking advantage of neural network technology is strengthened. Especially the diagnostic method of space gridding structure node bolt loosening injury has a prominent advantage to a large-scale space gridding structure with a plurality of the nodes.

An article pickup apparatus configured so as to set a grip unit model including a substantial region of the grip unit in an opened state and a grip region inside the substantial region, set position posture candidates of the grip unit, calculate a grip success possibility of any of the articles by the grip unit in each of the grip position posture candidates based on the position information acquired by a three-dimensional measurement instrument and the grip unit model, select position posture candidates from the position posture candidates based on the grip success possibility and setting as a grip unit position posture, and control the robot so as to move the grip unit to the grip unit position posture to pick up any of the articles.

The invention relates to a spot-welding connection failure value simulation system in the car bodywork manufacturing engineering field. In the invention, a circle-stress failure criterion generating module obtains nugget circle stress distribution form according to the failure mode of the spot-welding connection in a strike process to generate the circle stress failure criterion; a failure extreme value stress and an index-parameter obtaining module obtain welding-spot critical failure stress extreme values and dimensionless stress sub-item index initial values under the condition of the peak values of four exterior loads; four types of sample value models which are pulling-cutting, pulling-extending, pulling-bending and pulling-twisting are established in a welding-spot connection value simulation module; an explicit dynamics analysis module couples circle stress failure criteria and obtains the continuous distributed inner stress of a welding-spot unit model and an extreme value stress borne by the welding-spot unit during failure time by simulation; a welding-spot failure material databank module stores the critical failure stress extreme values and the dimensionless stress sub-item index initial values of each stress component. The system not only can enhance the impact simulation precision without impact on the calculation efficiency, but also can reduce the design and exploitation cost.

The invention provides an optimization modeling method for coupling of production and energy of continuous enterprises. The method comprises the following steps: establishing a CEECOM unit model X; setting an information parameter of a CEECOM production dispatch velocity model psi to generate a CEECOM system model; determining the material type and listing a constraint equation according to the Petri network topology structure of the CEECOM system model; and running a simulation algorithm to calculate energy consumption and generate a corresponding curve. The method adopts a color expansion blending Petri network method, and gives consideration to energy flow, material flow and information flow. The modeling method of the invention has strict theoretical foundation, is concise, convenient and easy, and is suitable for practical use. The method realizes reoccurrence of energy consumption process of enterprise production by acquiring data from a DCS or database. Safety pre-warning is provided regarding unsafe information parameter of energy consumption equipment (unit) in enterprise production energy consuming activities, and the control model implements corresponding processing if a corresponding measurement cannot be obtained within the safety pre-warning time. The method can be jointed with an ERP so as to realize dynamic simulation in the enterprise production energy consuming process.

The invention relates to a thermal power unit coal heat value real-time monitoring method and a heat value observer thereof. The invention comprises the following steps: 1) based on the dynamic characteristics of the thermal power unit, the heat value observer is established by the energy conservation law; 2) during the stable operation of an actual operating unit under the conditions of the designed coal rank and various loads, the corresponding relation among all the operation parameters of the actual operating unit can be searched in a DCS control system; 3) according to the probability statistics on the operation parameters of the actual operating unit, the static configuration and the dynamic configuration of the parameters of the unit model are carried out, and thus the unit model can be perfectly matched with the actual operating unit; 4) according to the coal consumption signal which is measured in site and the current operation parameters of the unit, the heat value observer can get a heat-value modified parameter through calculation, and the modified parameter can modifies the coal consumption signal in site to obtain the standard coal consumption signal. The application in site shows that the monitoring method and the observer can perfectly make the online real-time monitoring of the changes of the coal heat value, and thus the control system can perfectly overcome the interference on the boiler combustion due to the coal quality variation.