47 results about "Loop design" patented technology

The invention relates to the technical field of aero-engines, and discloses an automatic design method for aero-engine turbine blades, which analyzes design requirements through a language large model, combines a retrieval enhancement technology and a turbine blade expert knowledge base, performs interdisciplinary coupling verification by utilizing a step-by-step reasoning template, and generates and optimizes part design schemes and parameters. And then calling parametric modeling and an AI simulation agent model to carry out multi-physics field prediction, comparing a result with a requirement, if the result meets the requirement, outputting design, otherwise, automatically iterating and adjusting parameters until the parameters reach the standard or reach the maximum number of iterations. According to the method, end-to-end intelligent closed-loop design from design requirements to design results can be realized, manual intervention is reduced, a design scheme meeting performance requirements can be quickly generated, the design efficiency can be improved, the design cost can be reduced, and the design quality can be improved.

The invention relates to the field of electronic competition and data processing, and discloses a competition dynamic priority grouping and intelligent arrangement system, which comprises an event twinborn body construction module used for aggregating multi-modal data in real time and constructing a competition panoramic digital mirror image; the dynamic narrative position potential field generation module is used for quantifying and modeling multi-dimensional narrative values of all potential games in the future, such as quick cold, perennial enemy and the like, on the basis of event twinborn body data; the intelligent arrangement decision-making module takes the competition state and the narrative position potential field as input, and outputs an optimal arrangement scheme by taking maximization of competition fairness, audience participation degree and narrative value as targets through a reinforcement learning algorithm; and the narrative intervention module is used for identifying narrative opportunity points by analyzing the potential field gradient and generating an executable operation strategy to actively improve the competition attraction. Through the closed-loop design of "intervention-feedback-enhancement", the system can be continuously self-optimized, and the ornamental value and commercial value of the competition are significantly improved.

The invention discloses a smart home multi-device linkage power utilization control method based on MOS tubes, and belongs to the technical field of smart home control. The digital processor is used as a core, the built-in numerical control module and the data processing unit are matched, the on-off state of the MOS tube is accurately regulated and controlled in combination with a program control algorithm, fine management of power utilization parameters of intelligent household equipment is achieved, the limitation that traditional control response is lagged and poor in adaptability is broken through, rated parameters and real-time requirements of the equipment are dynamically matched, and the power utilization efficiency is improved. The optimal operation of equipment is guaranteed to prolong the service life, invalid energy consumption is reduced, a high-precision foundation is laid for multi-equipment cooperative linkage, the stability and energy efficiency of a system are improved, multi-scene linkage logic is preset by means of a logic state machine, and rapid switching and reliable execution of multi-scene linkage are realized by matching with an application selection switch of an MOS tube array structure. Scene requirements are automatically adapted, and through independent loop control, fault detection and standby loop design, the problems that linkage switching is tedious and the fault influence is large are solved.

The invention relates to the technical field of data center heat management, and particularly discloses a double-loop heat recovery immersed data center cooling system, which comprises an immersion cooling cabin, a heat recovery module, a heat recovery module, a heat recovery module and a heat recovery module, wherein the immersion cooling cabin is used for installing a server circuit board in an immersion manner; the cooling liquid circulating system is used for removing core heat of the server; a main circulating loop is formed by a variable-frequency circulating pump, a precision filter, a cooling liquid conveying valve, a spraying device, an immersion cooling cabin, a cooling liquid return valve and a refrigerating unit which are connected in sequence; the waste heat recovery cooling system is independent of the main loop and is connected to the heat storage tank through a heat exchange pipe immersed in cooling liquid, a waste heat adjusting valve and a water pump to form a secondary loop for extracting medium and low temperature waste heat; and the intelligent regulation and control module is used for collecting data and outputting a control instruction. According to the system, through immersed direct heat exchange and independent double-loop design, cooperation of server core heat dissipation and waste heat recovery is achieved, and the heat dissipation efficiency and the energy comprehensive utilization level are improved.

A voltage regulation device includes: a first low-dropout (LDO) regulator, a second LDO regulator and a signal coupling circuit. The first LDO regulator is configured to receive an input voltage of the voltage regulation device and accordingly generate and stabilize an output voltage of the voltage regulation device. The second LDO regulator is coupled in parallel with the first LDO regulator, and configured to provide supplementary regulation to further stabilize the output voltage. The signal coupling circuit is coupled between the first LDO regulator and the second LDO regulator, configured to apply a voltage provided by second LDO regulator to the first LDO regulator, thereby modulating an operation of the first LDO regulator.

The invention discloses a large language model agent system and method and related equipment. The large language model agent system comprises an input analyzer module, a strategy generation module, an execution controller module, a task result evaluation module, an reflection module and a strategy rewriting module, and a self-adaptive optimization closed loop for task execution is formed through the reflection module and the strategy rewriting module. Wherein the reflection module can generate a report containing failure reasons, and the problem of failure diagnosis is solved; the strategy rewriting module optimizes a plan according to a report, adjusts tool calling, and realizes self-learning and strategy reconstruction; the closed-loop design forms a complete cognitive process, and an input analyzer guarantees the stability of prompt. According to the system, the task completion rate, the execution stability and the scene adaptability are remarkably improved, the robustness and the error tolerance in a multi-step complex task are particularly enhanced, and the key blank of an existing language model agent system in the aspects of self-reflection and self-optimization is filled.

The utility model discloses a parabolic radar jammer antenna servo control device, which relates to the technical field of radar jammers and comprises an antenna, the antenna is connected with a servo turntable display control unit, and the servo turntable display control unit is electrically connected with a display control computer. The servo turntable display control unit comprises an antenna control unit, a network switch, a shaft angle encoder and a servo driving unit; the servo driving unit comprises a motor, a motor controller, a control protection circuit, a direct current power supply and a distribution line; the servo driving unit is a rotating speed and current double-closed-loop speed regulation system. According to the utility model, the control protection and driving circuits are reasonably adopted, so that the safety, the response speed and the tracking precision of the system are improved; a double-loop design is adopted, a current loop provides a control object with a wide frequency for a speed loop, and the speed loop improves the low-speed stability of the system, expands the speed regulation range of the system, improves the disturbance resistance of a load, and provides a control object with a wide frequency for position control.

The embodiment of the invention discloses a strategy management method and device, a storage medium and a terminal. On the basis of a cache data execution strategy, near-end execution logic is adopted, so that a strategy engine completes total calculation locally in a system, real-time dependence on far-end service is relieved, and end-to-end processing time consumption is further reduced. By constructing a double-layer heterogeneous cache barrier, when the first cache is abnormal, the first cache is automatically switched to the second cache to read strategy data, so that automatic fault isolation and service degradation are realized, and the service robustness and continuity are ensured. According to the invention, a bottom layer support mechanism of timing synchronous update double caches decouples data synchronization and use, periodic batch synchronization replaces real-time query, and a whole set of process closed-loop design is adopted, so that the problems of high delay, single-point fragility and uneven resource load under a centralized architecture are systematically solved, and finally, the strategy execution capability with both high performance and high availability is achieved.

The present application relates to the technical fields of semiconductor automation testing, in particular to a PMU and reference voltage source dual-function circuit based on ATE testing, comprising an AD5522 chip, a function switching module, a multi-DUT expansion module, a precision optimization module and a control module; the whole adopts single chip function multiplexing design, solves the pain point of large PCB space occupation, achieves the effect of significant space reduction, adopts single PMU multi-DUT expansion design, solves the pain point of high DUT test cost, achieves the effect of significant test cost reduction, adopts Kelvin four-wire and feedback closed loop design, solves the problem of low reference voltage precision, adopts relay switching and programming control design, solves the problem of poor function flexibility.

The utility model discloses a kind of multi-loop processing CV mode electronic load instrument, it includes main control module, main power module, auxiliary power module, display module, button module, power amplifier module, communication board module and interface module.Main control module is core control unit, contains instrument amplifier, and difference proportional circuit, integrated operational amplifier circuit, advance adjustment circuit, lag adjustment circuit and analog switch, different input signal characteristics are adapted by flexible switching adjustment mode.The main power module and auxiliary power module provide stable power supply respectively;Display module and button module form man-machine interface;Power amplifier module drives high-power MOS tube to maintain constant voltage output;Communication board module supports multiple communication protocols;Interface module provides physical connection port for external equipment.The utility model significantly improves system stability and adaptability through multi-loop design, suitable for a variety of application scenarios.

The application relates to the technical field of aero-engines and discloses an automatic design method for a turbine blade of an aero-engine, which comprises the following steps: analyzing design requirements through a language large model, combining retrieval enhancement technology with a turbine blade expert knowledge base, utilizing step-by-step reasoning templates to perform cross-disciplinary coupling verification, generating and optimizing a component design scheme and parameters, subsequently calling a parameterized modeling and an AI simulation agent model to perform multi-physical field prediction, comparing the result with requirements, outputting a design if the requirements are met, and otherwise automatically iteratively adjusting parameters until the requirements are met or the maximum number of iterations is reached. The application can realize end-to-end intelligent closed-loop design from design requirements to design results, reduce manual intervention, quickly generate a design scheme meeting performance requirements, improve design efficiency and reduce design cost, and improve design quality.

The invention discloses a control method, device and equipment for a four-switch buck-boost converter, and the method comprises the steps: obtaining the current input voltage and output voltage of the four-switch buck-boost converter, and generating a loop regulation quantity based on the output voltage and reference voltage after passing through a loop; the control period of the inductive current of the four-switch buck-boost converter is obtained; when the control period is smaller than or equal to a threshold value, the four-switch buck-boost converter is adjusted to be in a fixed-frequency intermittent conduction mode, and the time of the second stage of the inductive current is adjusted according to the loop adjusting quantity, so that the output voltage is kept stable; when the control period is larger than a threshold value, the four-switch buck-boost converter is adjusted to be in a frequency conversion continuous conduction mode, and the time of the first stage of the inductive current is adjusted according to the loop adjusting quantity, so that the output voltage is kept stable. According to the invention, ZVS can be realized while the difference of gains in different modes is reduced and the difficulty of loop design is reduced, and the optimal efficiency can be ensured.

The embodiment of the specification discloses a policy management method, device, storage medium and terminal. Based on the cache data execution policy, the near-end execution logic is adopted, so that the policy engine completes the full calculation locally in the system, and the real-time dependence on the remote service is released, and the end-to-end processing time is further compressed. By constructing a double-layer heterogeneous cache barrier, when the first cache is abnormal, the second cache is automatically switched to read the policy data, the automatic isolation of faults and the degradation of services are realized, and the service robustness and continuity are guaranteed. The bottom supporting mechanism of the double cache synchronously updated at a fixed time decouples data synchronization and use, and replaces real-time query with periodic batch synchronization. Through the closed-loop design of the whole process, the problems of high delay, single-point vulnerability and uneven resource load under the centralized architecture are systematically solved, and finally the policy execution capability with high performance and high availability is achieved.

The invention relates to the technical field of temperature control systems and discloses a temperature control system based on double-loop design and application, the temperature control system comprises a case, a plate heat exchanger and a cooling unit, the plate heat exchanger and the cooling unit are located on one side in the case, and a system pipeline is arranged in the case; the liquid-phase heat dissipation loop system comprises a water pump, a second condenser, a confluence plate and an electronic flow divider which are sequentially connected through pipelines; the double-loop design is adopted, heat exchange is achieved through the central plate heat exchanger, and the first loop is a liquid-phase heat dissipation loop system; and the second loop is a gas-phase refrigeration loop system. The two loops can realize heat exchange through the central plate heat exchanger, the scheme can effectively reduce the refrigeration power required by the second loop, can meet the same temperature rise requirement, and has the advantages of smaller size and lighter module weight compared with other schemes; and under the condition that the size / weight is reduced, the device can be used in application scenes with high requirements on high-power heat dissipation and temperature rise.

The application discloses a current-type SVG control method based on improved DC bus voltage synchronization, which comprises the following steps: based on synchronous outer loop equivalent analysis, the current control type SVG is equivalent to a power synchronization loop based on a phase-locked loop synchronization loop; according to the relationship between the DC bus voltage of the SVG and the output active power, the power synchronization loop is equivalent to a DC bus voltage synchronization loop; on the basis of the DC bus voltage synchronization loop, an improved DC bus voltage synchronization outer loop that integrates a phase-locked loop is designed; a detection method based on the instantaneous reactive power theory is adopted to realize reactive current detection and complete the design of a reactive power compensation loop; a quasi-proportional resonant controller QPR and a proportional integral controller PI are adopted to design a current control inner loop; and the above loop designs are combined to jointly construct a control system of the current-type SVG, so that stable control of the current-type SVG is realized. The application can improve the stability under a weak power grid and help the stable grid connection and consumption of new energy.

The application provides a LMS-SOGI three-phase phase-locked loop design method and system suitable for a non-ideal power grid, and the method comprises the following steps: sampling three-phase grid-connected voltages of a grid-connected inverter to obtain voltage components through Clark transformation; the voltage components are respectively sent into two SOGI structures to extract positive sequence components of the grid-connected voltages; a least mean square LMS filter link mathematical model is constructed to design a least mean square LMS filter link step parameter; then, the positive sequence components of the grid-connected voltages are subjected to LMS filtering to obtain d-axis and q-axis positive sequence components of a fundamental frequency grid-connected voltage, the q-axis component of the fundamental frequency grid-connected voltage is subtracted by 0 to obtain a q-axis voltage phase-locked error signal, an output signal angular frequency adjustment amount ω is obtained through a PI controller, and a phase θ is obtained through integration. Finally, a three-phase grid voltage LMS-SOGI phase-locked model is built in MATLAB / Simulink simulation software, and different grid voltages are selected for comparative analysis of the filtering effect. The application solves the technical problem that the phase-locked technology of the grid-connected inverter is difficult to accurately lock the voltage frequency and phase in a specific scene.

The application relates to a complex system engineering architecture method and application, and relates to the technical field of complex system engineering architecture. Through selection of embedded, parallel, total and partial, superposition or dynamic adaptation basic architecture modes, professional application logic is accurately combined with corresponding support technology groups to construct a double-domain interactive innovation environment. On a method level, applicable schemes are selected from the architecture modes, functions are divided by division design, application logic is used to guide technology group configuration, digital twin models are used to drive micro-service module optimization, and a closed-loop design ecology is formed. On an action level, the method breaks through the traditional application-technology fragmentation bottleneck. On one hand, fuzzy requirements are upgraded to field logic design, ensuring that technology groups accurately match scene requirements. On the other hand, a double-domain real-time interaction environment is constructed, so that technology elements dynamically respond to logic feedback, significantly improving system efficiency and innovation vitality, and finally providing an expandable original innovation framework for complex engineering such as assistive robots and disaster prevention laboratories.

The invention discloses a current type SVG control method based on improved DC bus voltage synchronization, and the method comprises the steps: enabling a phase-locked loop-based synchronous loop of a current control type SVG to be equivalent to a power synchronous loop based on synchronous outer loop equivalent analysis; according to the relation between the SVG direct current bus voltage and the output active power, a power synchronization loop is equivalent to a direct current bus voltage synchronization loop; on the basis of a direct-current bus voltage synchronous loop, an improved direct-current bus voltage synchronous outer loop fused with a phase-locked loop is designed; a detection method based on an instantaneous reactive power theory is adopted, reactive current detection is achieved, and reactive compensation loop design is completed; a quasi-proportional resonance controller QPR is connected in parallel with a proportional-integral controller PI to design a current control inner loop; in combination with the loop design, a control system of the current type SVG is jointly constructed, and stable control over the current type SVG is achieved. According to the method, the stability under the weak power grid can be improved, and stable grid-connected absorption of new energy is facilitated.

The invention relates to the technical field of power systems, and discloses a network construction converter voltage supporting method and device, and the method comprises the steps: measuring the side voltage and current of a converter and the output end voltage and current of the converter when no fault occurs; measuring a zero-sequence current component effective value and a negative-sequence current component effective value, and calculating interphase measurement impedance and grounding measurement impedance; based on the zero-sequence current component effective value, the negative-sequence current component effective value, the inter-phase measurement impedance and the grounding measurement impedance, the fault type is judged, the fault phase is positioned, and the fault position transition resistance is calculated; and adjusting fault phase and non-fault input electrical quantity according to the converter side voltage and current when no fault occurs, the converter output end voltage and current and fault position transition resistance. According to the method, the fault deviation is quantified by taking the electrical parameters without the fault as the reference, the supporting method is quickly put into use when the fault occurs, and meanwhile, the fault phase and the non-fault phase are adjusted in a targeted manner; the real-time closed-loop design is fast in response, adapts to various fault scenes, and reduces the impact of the fault on the stability of the power grid.

The invention relates to the technical field of man-machine interaction, and discloses an AI man-machine cooperation loop design method, which comprises the following steps: analyzing a task target and decomposing a process structure, identifying a key decision node and a manual intervention node based on an analysis result, and generating a task framework; monitoring an AI execution state flow, extracting state features from the state flow to construct state representation, and generating a manual intervention trigger signal in combination with nodes of the task framework; packaging the context of the intervention request, pushing the packaged request to an artificial terminal, and receiving and integrating structured feedback from the terminal to generate an artificial decision instruction; fusing the AI reasoning result and the artificial decision instruction, recording an interaction sequence of the fusion process, and generating a collaboration session log; according to the collaboration session log and the task framework, dynamically adjusting collaboration rules among the nodes; the cooperative logic of AI execution and manual intervention can be accurately matched, the decision reliability and the overall efficiency of cooperation are effectively improved, and it is guaranteed that a task target is efficiently achieved.

The application belongs to the technical field of dehumidifiers, and discloses a variable-frequency dehumidifier temperature regulation system with step protection and EEV cooperative control, which realizes gradual protection through a three-stage step protection mechanism and dynamic threshold correction design; when first-stage early warning, fine-tuning parameters maintain low-load operation, when second-stage regulation, linkage heat dissipation auxiliary function is forced to cool down, and when third-stage emergency protection, the circuit is cut off to stop, thereby avoiding the impact of direct stop on the compressor, EEV and other core components, and prolonging the service life of the equipment; the protection threshold is corrected in real time by a decision fault-tolerant module according to the environmental temperature and humidity and equipment load, thereby reducing protection false triggering; through EEV double-PID cooperative control and compression linkage closed-loop design, the temperature control precision and heat exchange efficiency are improved; the EEV regulation module adopts temperature deviation PID and overheating degree PID dynamic weighted adjustment, combined with temperature fluctuation prediction mode, thereby avoiding the situation of evaporator frosting and condenser heat exchange efficiency reduction.

The invention discloses a flexible DC converter dual fault identification method comprising the following steps: taking a flexible DC converter as a research object, carrying out period division on collected voltage data, calculating to obtain a deformation value in each period, determining the characteristic ratio of different fault types according to the deformation value, and calculating the fault type according to the characteristic ratio; and amplifying the characteristic ratio to obtain a characteristic strip of the fault type, simulating open-circuit faults of IGBT tubes of different modules, forming a fault characteristic strip library, and realizing identification of double faults of the flexible DC converter. The method gets rid of dependence on an unstable data source; the fault recognition efficiency is improved by constructing a fault feature strip library; a targeted fault handling method is provided, and a closed-loop design from identification to processing is realized.

The invention provides a current transformer verification system and method suitable for a novel power system, and relates to the technical field of current sampling equipment, a double-loop design is adopted, the system comprises a first primary loop and a second primary loop, and specifically, the first primary loop is used as a main test loop; the second primary loop is used for providing harmonic current; when a wide-range error test under power frequency, an error test under power frequency, an error test under half wave, a magnetic saturation margin test and a residual magnetism error test are carried out, a first primary loop is selected to carry out a current rising test; when an error test under harmonic waves is carried out, the first primary loop and the second primary loop are selected to carry out a parallel test, and a current rising test is carried out, so that the tested current transformer is in a running current of power frequency superposed harmonic waves during a test. Error tests and magnetic saturation margin and residual magnetism error tests under various waveforms such as power frequency, wide-range power frequency, direct-current component and half wave are carried out, and the measurement precision and stability of the current transformer are further improved.

This invention discloses a novel design paradigm for phase-locked loops (PLLs) based on chaos theory, relating to the field of millimeter-wave radar integrated circuit technology. This design breaks away from the traditional approach of suppressing chaos in PLLs by actively introducing a controllable chaotic operating point. Through dynamic adjustment of loop bandwidth and modulation depth, it utilizes the characteristics of singular attractors to accelerate phase acquisition and stabilization. During the startup phase, the system enhances nonlinearity to enter a chaotic state for rapid locking, while suppressing nonlinearity in the steady-state phase to improve linearity and noise performance. This invention also integrates lock detection and feedback control mechanisms to optimize loop parameters in real time, significantly improving the tracking capability and robustness of the PLL in scenarios such as frequency-modulated continuous wave (FMCW), exhibiting both universality and scalability.

The application discloses a design method of a phase-locked loop based on a lookup table mode, and first constructs a standard sine table containing 1024 points, wherein the interval between each point corresponds to the time difference of the lookup table; if the sine lookup table time is T, and the input power grid voltage period is T, then: T=T+T / N; when the value of N is larger, the lookup table step length step is smaller, and the phase locking is more accurate. The error of the dynamic adjustment of the phase locking step length is adjusted by a PI controller, so that the error is minimized. After the error between the power grid voltage period and the phase locking period is transmitted into the PI controller, the dynamic compensation error required for the adjustment at the current time is obtained, and then the error is superposed on the step length, so that the final accurate phase locking step length is obtained. The phase-locked loop parameters can be quickly determined, and the calculation burden in the design process is reduced.

The invention discloses an automatic monitoring and balancing screw air compressor and a vibration suppression method, the automatic monitoring and balancing screw air compressor comprises a compressor main body, a power driving unit and a vibration monitoring and suppression system, and the power driving unit comprises a coding type permanent magnet motor and a flexible coupler. The vibration monitoring and suppression system is characterized in that four groups of FBG sensors are arranged on the driving shaft and the driven shaft, three FBG sensors are arranged in each group along the circumferential direction of the shaft at intervals of 120 degrees, heat-conducting silicone grease is sprayed on the surfaces of the FBG sensors and matched with cooling fins to realize temperature protection, and vibration interference is reduced through a buffer pad; a signal is accessed to the demodulator through the optical fiber and the optical fiber slip ring; the demodulator realizes fault diagnosis through a fusion algorithm of a fiber bragg grating coupling response mechanism; the controller solves the problems that a traditional screw air compressor is low in vibration monitoring precision and poor in vibration suppression effect through the closed-loop design of FBG sensing, intelligent diagnosis and self-adaptive vibration suppression based on the diagnosis result, and is suitable for efficient and stable air source supply in the industrial field.

The application discloses a double-pulse test method for Econo module based on a drive and power loop, and is realized by a test circuit composed of an interface adaptation part, a power loop part, a drive circuit part and a measurement part, and specifically comprises the following steps: interface adaptation docking: an Econo module is directly docked with a special pin interface seat through a spring hole insertion mode, and the pin spacing and pin definition of the interface seat are completely consistent with the side pin of the module. The double-pulse test method for Econo module based on the drive and power loop, through special interface adaptation, short-path power loop design and independent drive control of the gate, realizes no switching connection of the test loop, effectively suppresses the parasitic inductance, eliminates the test error caused by the switching contact resistance, improves the precision and efficiency of dynamic parameter test of the Econo packaged IGBT module, and simultaneously reduces the operation difficulty and equipment investment cost.

The invention relates to the technical field of intelligent optimization, and provides a wind power master control PLC operation optimization method and system based on environmental parameter fusion, and the method comprises the steps: constructing a comprehensive and high-dimensional wind field feature description through fusing the far-end pre-detection data of a laser radar, the real-time state data of a cabin, and key environmental parameters; and the limitation and distortion problems of a single information source are overcome. And then analyzing a historical feature sequence by using a wind direction prediction model, accurately predicting the incoming flow wind direction at a future key time point, and converting a control mode from passive response to active pre-judgment. And finally, the prediction result is converted into a yaw compensation instruction which is subjected to security constraint and smooth processing and can be directly executed, and the yaw compensation instruction is issued to a master control PLC. According to the closed-loop design integrating perception, advanced prediction and safety compensation, the wind turbine generator can act in advance and accurately aim at incoming flow wind, and therefore on the premise that the safety of the wind turbine generator is guaranteed, the energy capture efficiency is maximized, and unnecessary mechanical loads are reduced.

This application provides a harmonic self-aligned voltage-controlled resonator and frequency synthesizer, belonging to the field of resonator technology. In this design, each port of a four-mode transformer is connected to a capacitor switch array to maintain capacitive symmetry between ports. A set of negative transconductance transistors is connected between the first and second ports of the four-mode transformer, and another set of negative transconductance transistors is connected between the third and fourth ports. The negative transconductance circuit provides negative resistance to compensate for the losses of the four-mode transformer. Each capacitor in the impedance balancing unit is connected to the two ends of the first and fourth ports to balance the impedance of each port of the four-mode transformer. A mode switching unit is connected between the second and third ports to control the switching of the local oscillator mode of the four-mode transformer. This application simplifies the phase-locked loop design of a quantum bit measurement and control system, improves phase noise performance in cryogenic environments, and provides a reliable local oscillator signal source.

The application discloses a kind of overflow valve port parameter design and optimization method, belong to the field of hydraulic control valve design, comprising: first, obtain working condition parameter and calculate total flow diameter, determine valve port design parameter range according to ball head structure to construct design parameter set;Then, stress analysis is carried out and simulation model is established, and the parameter interval is corrected by stress simulation, and then the feasible scheme is screened by fluid-solid coupling simulation to update the design parameter set;Finally, a multi-objective optimization function is constructed, and the optimal valve port parameter combination is output by iterative optimization.The application forms a closed-loop design system of "theoretical calculation-parameter interval limitation-stress simulation check-fluid-solid coupling analysis-multi-objective iterative optimization", which can effectively alleviate valve port stress concentration, reduce pressure loss, improve flow field uniformity and structural strength, and improve overflow valve port design efficiency and quality.