36 results about "Functional block diagram" patented technology

A computer system for generating a cause effect matrix as a user interface to develop a control program based on the cause effect matrix and to compile and download the resulting program into a programmable controller. A cause effect matrix diagram is used to develop a function block diagram program which is a standard IEC 1131-3 language. The function block diagram is translated into structured text which is compiled into intermediate code. The intermediate code is translated into the native code for the micro-processor of the target control system, including but not necessarily limited to the Motorola processor MPC-860. The automation of a cause effect matrix diagram to generate a function block diagram permits additional capability by allowing functions for causes, intersections, and effects. Because special functions may be included, the results of a cause generate timing functions or other computations before initiating the effect.

A controller configuration system and user interface therefor are disclosed for creating and editing controller function block diagrams for use in control systems. The interface provides feedback loop identification features, wire connection cross-referencing and hyperlinks, wire connector name matching, pin datatype visualization, correct wiring indication and wiring error indications, and intelligent deletion and restoration features. In addition, the interface provides block morphing, free-form text boxes, error navigation, error indication, and block execution status information.

A system for hazards analysis includes: a memory device for storing a program; a processor in communication with the memory device, the processor operative with the program to: access the memory device to obtain information specifying a system to be analyzed; build functional block diagrams using the information specifying the system to be analyzed; receive user-input hazards analysis elements; and use the functional block diagrams, the user-input hazards analysis elements and tree fault analysis for hazards analysis.

The invention provides an abnormal behavior description method based on characteristics of a block mass and a track. The abnormal behavior description method comprises the following steps of utilizing a characteristic extraction method to extract color characteristics, textural characteristics and position characteristics of a scene, utilizing a K-means algorithm to cluster the characteristics to generate the block mass, and utilizing a conditional random fields (CRF) to conduct description on the block mass; and utilizing a mixed gaussian model to conduct sport target detection, extracting track characteristics of a target, combining the block mass description and the track characteristics to form a combined characteristic vector quantity, using a hidden markov model (HMM) to conduct modeling on the combined characteristic vector quantity, utilizing the built HMM to describe abnormal behaviors of the target in the scene, and enabling an abstract attached diagram to serve as a functional block diagram of the abnormal behavior description method . The abnormal behavior description method based on the characteristics of the block mass and the track not only considers influences of the scene on the abnormal behaviors, but also achieves long-time tracking and describing on the target.

Methods and systems are disclosed for automatically generating an execution order for a control system function block diagram. The input data availability is determined for the inputs of the function blocks in the diagram, and an execution order is generated for the function block diagram according to the input data availability for the function block inputs. Also disclosed are methods and systems for generating a control routine from a function block diagram having a plurality of function blocks, wherein the control routine is generated from the function block diagram according to the execution order.

The invention relates to a method for analyzing an influence degree on the reliability of a numerically-controlled machine tool subsystem, belongs to the technical field of numerically-controlled machine tools, and aims to make up the disadvantages in the prior art that the disturbance of fault time of other subsystems of the numerically-controlled machine tool and test censoring time influences are not considered. The method comprises the following steps: (1) reading an operation recording meter of the numerically-controlled machine tool; (2) reading fault time data of the subsystem; (3) establishing a reliability functional block diagram of a numerically-controlled machine tool system and determining a subsystem reliability relation; (4) processing the disturbance of the fault time of the other subsystems of the numerically-controlled machine tool and the test censoring time influences according to censoring data; (5) establishing a reliability model of the numerically-controlled machine tool subsystem; (6) determining the reliability model of the numerically-controlled machine tool system; (7) calculating the influence degree on the dynamic reliability of the numerically-controlled machine tool subsystem; (8) calculating the influence degree on the core reliability of the numerically-controlled machine tool subsystem. According to the method provided by the invention, the reliability model of the numerically-controlled machine tool system is fitted and compared with an empirical distribution function model and the precision is less than 5%; the actual analysis requirements can be met.

A voter function block, which can be integrated into a function block diagram programming environment in a process plant control or safety system, implements voter logic in conjunction with providing operational and maintenance overrides which may be set to override individual inputs to the voter function block as well as to override the output of the voter function block. The voter function block, which is easy to create, use, test, debug and document, includes one or input limit detection units which detect if a particular redundant input has reached a specified limit indicating a condition within the process plant, an override unit that may be set by a user to override the consideration of that input in the voting function, a voting logic entity that determines if a trip condition exists based on the values of the valid or non-inhibited inputs, and an inhibit block that may used to override the output of the voter logic block during, for example, a startup or other operational condition. The voter function block may be integrated into a process control or safety system by being communicatively connected to other function blocks, such as to analog or digital input function blocks, analog or digital output function blocks, control function blocks, cause and effect function blocks which implement cause and effect logic, etc. Within the process control or safety programming environment.

The invention discloses a dynamic accident deduction simulation-based failure mode and influence analysis method. According to the method, in allusion to characteristics of analyzed objects, a function box of each module at the lowest agreed layer is constructed to construct a function box map; being different from the traditional operation of adding failure rates and carrying out reliability analysis on function modules, the method is characterized by constructing a dynamic accident deduction simulation model which comprises elements such as state, event and the like for internal behaviors ofeach function box, connecting all the function boxes into a whole through constructing logic and time relationships between the function boxes, and finally simulating dynamic operation processes of systems through a dynamic discrete event simulation method so as to find out failure events and generation probabilities of the systems and then carry out further failure influence and hazard analysis.The method disclosed by the invention is capable of solving the problem that the traditional failure mode and influence analysis method cannot carry out temporal logic analysis and combined functionfailure analysis.

The invention takes an EPA field bus distributed type control system as an experimental platform and provides a programming modeling and optimization method based on a state space model aiming at an IEC61131-3 function block diagram programming language. On the basis of constructing a mathematical model to the algorithms of all the function block encapsulations, the method respectively maps the DI, AI, DO, AO and an internal memory unit of the system into the input vector, the output vector and the state vector of the model, establishes the state space model which controls the program according to the logic relationship between the function blocks which is determined by the mathematical model of the function blocks and the configuration form of the program, and describes the interaction relationship among the system input, the internal state and the output. The invention also applies methods such as a logic algebraic formula, a Karnaugh map and a timer combination and the like to simplify the state space model, and carries out re-programming to the simplified model, thus realizing the optimization of the programming control.

The invention discloses a millimeter-wave cloud detection radar based real-time online calibration method. The method includes: firstly, completing system operation foundation construction according to a hardware functional block diagram and a software flow diagram; secondly, in system operation, subjecting transmission module power and receiving channel gain to real-time measurement calibration;finally, completing once system internal calibration source calibration at the zero o'clock every day, and reporting state monitoring results to realize real-time system state monitoring. The method has advantages that firstly, by adoption of the simple low-cost scheme, the problem of high resource consumption in previous calibration is solved; secondly, real-time online calibration can be realized, real-time system fault monitoring is realized, and high reliability of acquired data is guaranteed; finally, the method is convenient and simple in operation and high in practicality and can be applied to practical millimeter-wave cloud detection radar systems. Therefore, the method is remarkably high in practicality and application value.

The invention relates to a method for achieving soft starting of a PWM convertor. According to the method, a sawtooth wave generating circuit, a voltage comparator and an AND gate are utilized for achieving soft starting of the PWM convertor. The functional block diagram for achieving the technology is shown as the attached picture. The treatment process comprises that firstly, the sawtooth wave generating circuit is utilized for converting an input drive signal into a sawtooth wave, wherein the frequency and the duty ratio of the sawtooth wave is unchanged; then the voltage comparator is adopted for comparing the sawtooth wave and a slowly-rising reference voltage, and a pulse voltage signal is obtained, wherein the duty ratio of the pulse voltage signal is gradually increased; finally, the pulse voltage signal and an input drive voltage are compared through the AND gate to obtain an output drive voltage, wherein the duty ratio of the output drive voltage is gradually increased. At the moment of starting up, the duty ratio of the drive voltage is gradually increased, after a switching power supply works normally, the voltage comparator outputs a high level all the time, and the output drive voltage and the input drive voltage are completely equal. Therefore, soft starting of the PWM convertor is achieved, and the method has broad application prospects in the field of power sources.

The invention discloses a software replacing testing method applied to an airborne processor module. The method comprises the following steps that 1, functional analysis is conducted on a specific board, and a functional structure diagram of a circuit module is drawn; 2, a storage chip of circuit module software is analyzed according to the functional structure diagram in the first step, and an operation or replacement mode of the chip is researched; 3, main functions achieved by a circuit board are analyzed according to main devices on the circuit board, and design ideas and design processes for replacing the software are designed by combining the processor module; 4, program codes which enable the circuit board to achieve a self-checking function is developed according to the design processes, and software replacing is conducted; 5, checking and testing are conducted on the circuit board according to designed software functions, and original functions are restored. According to the software replacing testing method applied to the airborne processor module, function reverse operations of personnel to the circuit board are reduced, thorough testing can be conducted on the whole board, searching and locating of faults are convenient, and the software replacing testing method can be applied to rapid detection of similar boards.

A method for performing simulated evaluation on the curative effect of a multiple myeloma bone disease therapeutic method includes the steps that first, according to various experimental results relevant to multiple myeloma bone disease, potential relevance between different experimental results is analyzed, and a functional block diagram relevant to the forming mechanism of the multiple myeloma bone disease is established; then, a mathematical model capable of accurately simulating mutual effects of all factors in the functional block diagram of the forming mechanism of the multiple myeloma bone disease is established, and the forming process of the multiple myeloma bone disease is simulated; finally, the mathematical model is expanded and made to be capable of describing the mechanism of action of the therapeutic method, and simulated evaluation is performed on the therapeutic method. With the method, the testing cost of the therapeutic method can be reduced, the development period of the therapeutic method can be shortened, the forming process of the multiple myeloma bone disease can be simulated more completely, the method is favorable for carrying out some medical experiments which may harm the health of the human body and thus is difficult to perform in the human body, and thus a basis is laid for thoroughly healing the multiple myeloma bone disease.

The invention provides a robot joint torque control system and a load compensation method thereof, and belongs to the technical field of robot joint motion control. Firstly a mathematical model of therobot joint torque control system is built, equivalent deformation is carried out on a system functional block diagram, it can be seen that load parameters have great influence on joint torque output, and by designing a load compensation controller, the influence of the load parameters on the joint torque output is effectively eliminated. On the basis of compensation, the system is equivalent toan inertial element, then by adjusting PD controller parameters to increase system open-loop gains, the system bandwidth is improved, the response speed of the robot joint torque control system is improved, and thus the robot joint torque control system performance is improved.

The invention discloses a design method of a modular power supply for a flying robot carrying a redundant mechanical arm. The design method mainly comprises the following steps: designing an input andoutput index of the modular power supply according to a design requirement of the flying robot carrying the redundant mechanical arm; designing a connection mode of a power supply module and a circuit board and input and output ports and the like according to the input and output index; drawing a functional block diagram of a single power supply module according to the port design content of thepower supply module, wherein the single power supply module includes a switching power supply system, an independent current sharing system and a protection system; designing and manufacturing a PCB circuit board of the modular power supply according to a designed hardware system schematic diagram of the single power module; and installing the PCB circuit board into the flying robot carrying the redundant mechanical arm. The method of the invention has great improvement in the safety, reliability and secondary development of the modular power supply, and has strong practicability.

The invention discloses a water chilling unit digital twinborn model construction method and device, a terminal and a storage medium, and the method comprises the steps: constructing a digital twinborn model family of a water chilling unit based on the data of the water chilling unit in multiple fields, the digital twinborn model family comprising a three-dimensional geometric model, a performance degradation model, a mechanism simulation model and a principle block diagram model; extracting operation characteristics of the water chilling unit according to the monitoring data of the water chilling unit; and according to the operation characteristics and the output of each model in the digital twin model family, carrying out online recursive identification on the models in the digital twin model family by adopting a recursive maximum likelihood method, and carrying out real-time updating on parameters of the models in the digital twin model family so as to realize virtual-real synchronization. According to the method, the water chilling unit is modeled from multiple fields, the parameters of the model are updated in real time according to actual monitoring data in the operation process of the water chilling unit, the actual operation mechanism and characteristics can be truly and reliably described, and virtual-real consistency synchronization of the digital model and the water chilling unit is achieved.

The invention relates to a method for applying a single-supply error amplifier to a negative high voltage power control circuit. According to the application method, the sampling of the negative output voltage of a high voltage power supply by the common positive and negative double-supply error amplifier is broke through, and the sampling, phase reversal, comparative amplification and control adjustment of the output voltage of the negative high voltage power supply are realized through the single-supply error amplifier. The functional block diagram of the application method is shown as a figure in the specifications. The processing flow comprises the following steps of: sampling the output voltage of the negative high voltage power supply by using a resistor to obtain a negative low voltage signal; performing phase reversal on the sampled negative low voltage signal by using the single-supply error amplifier to obtain a positive low voltage signal; and transmitting the positive low voltage signal to single-supply error amplifier, comparing the positive low voltage signal with reference voltage, amplifying the positive low voltage signal, and outputting an error signal. The error signal can change the duty ratio of a power drive control signal, so that the final output voltage of the power supply is adjusted; and the method has a wide application prospect in the field of power supplies.

The invention discloses a multi-agent-based dynamic reliability simulation evaluation method for a polymorphic system, and particularly relates to a dynamic reliability evaluation method for a dynamicsystem, which is based on multi-agent modeling and supports description of polymorphic functions, polymorphic faults and influences of the polymorphic functions and the polymorphic faults of constituent units. The method comprises the following steps: 1, abstracting polymorphic system elements based on an intelligent agent, and abstracting a polymorphic system and an operation process thereof into a task type intelligent agent and a system type intelligent agent; 2, describing and analyzing the functional polymorphism of the abstracted intelligent agent based on the functional block diagram;and 3, analyzing agent fault polymorphism and influence based on the FMEA, and describing and analyzing the fault polymorphism of the abstracted agent through the FMEA. 4, defining interaction rules between agent functions and fault polymorphisms as well as between agents; and 5, on the basis of the multi-agent polymorphic system reliability model, calculating the system reliability according to multiple simulation results and the average performance of the evaluation system, R (t) = 1 (t)/n.

The invention relates to a method for producing improved ZVT PWM converter auxiliary drives. According to the method, monostable circuits are utilized to perform phase position movement and adjustment on main switch tube driving signals, therefore, auxiliary switch tube drives capable of being adjusted in phase position and pulse width can be obtained, and work requirements of improved ZVT PWM converters are met. As is shown in the figure, according to the functional block diagram of the application method, the processing flow includes the steps that firstly, through the first monostable circuit, a pulse signal adjustable in pulse width is obtained by the utilization of signal falling edges after master drive differential; then, the auxiliary drives are obtained through the second monostable circuit. The phase position and the pulse width of each auxiliary drive can both be adjusted, auxiliary switch tubes of the improved ZVT PWM converters can be opened in advance of a main switch tube, the zero voltage condition is created for opening the main switch tube, then, the auxiliary switch tube is closed, the main switch tube works in a mode same as PWM, and the work requirements of the improved ZVT PWM converters are met.

The invention belongs to the technical field of electric appliance experiments, and discloses an electric appliance product aging tester. According to a functional block diagram of the electric appliance product aging tester, a touch screen, an industrial personal computer, a centralized controller, a switching power source and A-side and B-side control units are respectively powered by AC220V voltage input after a K main switch is switched on; parameters such as A-side or B-side test time, power parameters, temperature parameters, high-pressure parameters, low-pressure parameters, impact testparameters, failure product parameters, group alarm turn-off and the like are set on a touch screen page for confirmation; K1 and K2 are switched on to acquire serial number data corresponding to A-side or B-side control units in one-one correspondence in real time, and the serial number data are transmitted to a touch screen and an industrial personal computer for storage and display. Accordingto the electric appliance product aging tester disclosed in the invention, the K1 switch and the K2 switch are switched on to transmit the number data which is acquired in real time and corresponds tothe A-side or B-side control units in one-one correspondence to the touch screen and the industrial personal computer for storage and display; batch products are sorted and screened within the test time: qualified products, unqualified products and invalid products are counted and gathered to generate reports.