40 results about "Unstable status" patented technology

The present application relates to the technical field of intelligent safety monitoring, in particular to a chemical laboratory risk early warning method and system based on a multi-modal data fusion algorithm, in the present application, the spatial gradients of multi-modal data such as gas concentration and temperature are calculated, and the coupling relationship and time delay among these gradients are analyzed, thereby realizing deep insight into the dynamic changes of the laboratory environment, no longer relying on isolated single-point threshold judgment, but evaluating stability according to the cooperative phase of heat diffusion and wet flow process, this way can effectively identify the potential unstable state caused by the combined action of multiple factors, even if each single parameter has not reached the alarm limit value, the risk can also be captured in advance, at the same time, through the aggregation analysis of adjacent unstable areas in space, the spreading trend and influence range of the risk can be revealed, thereby generating more accurate and forward-looking early warning, significantly reducing false alarms caused by non-dangerous transient fluctuations.

The application relates to the technical field of teaching instruments, and discloses an interactive teaching instrument and a use method thereof, which comprise a supporting assembly, the top of the supporting assembly is provided with a fixing assembly, the top of the fixing assembly is provided with an adjusting assembly, one side of the adjusting assembly is provided with a display assembly, the display assembly is provided with a light-shielding assembly, the supporting assembly comprises a base, pressure sensors are arranged at the lower ends of the four corners of the base, the fixing assembly comprises a fixing plate, the adjusting assembly comprises a rotating motor arranged at the bottom of the fixing plate, the application can flexibly adjust the angle position, effectively reduce the reflection, avoid affecting the teaching effect, actively remove dust from the display component, improve the display definition, timely intervene when the whole is in an unstable state, improve the stability of the whole, effectively protect the display component when the whole is tilted, and prevent the display component from being damaged.

The utility model discloses a portable ladder stand for building construction, a base comprises a cross rod and two supporting seats which are oppositely arranged, each supporting seat is connected with the cross rod through a sliding rod, and at least one part of the sliding rod is embedded in the cross rod and can do horizontal telescopic motion relative to the cross rod. When facing the uneven ground, namely the ground on one side is higher and the ground on the other side is lower, the supporting seat on the lower side can extend outwards through the sliding rod until the two supporting seats can be in close contact with the ground and keep stable, so that the problem that an unstable state of'three-point suspension 'easily occurs on the uneven ground is effectively solved; through the telescopic design, the ladder stand can adapt to different terrains by adjusting the structure of the ladder stand, so that a relatively stable supporting state is kept all the time, the gravity center of the ladder stand is prevented from shifting, the risk that constructors fall down due to inclination of the ladder stand in the climbing process is reduced, and the occurrence probability of high-altitude falling accidents is greatly reduced.

The application discloses a mobile collaborative robot with a stability maintaining function, and relates to the technical field of robots.The mobile collaborative robot comprises a mobile arm, wherein the mobile arm is arranged on a stability maintaining part, the stability maintaining part is arranged on a moving part, the moving part is provided with a moving wheel, and the stability maintaining part is provided with an inspection opening.The stability maintaining part is arranged between the mobile arm and the moving part, the unstable state of the moving wheel when passing through an uneven road is filtered through the stability maintaining part, the posture information of the stability maintaining part is collected to control the corresponding movement of the mobile arm, the influence of the road on the mobile arm is reduced, and the problem that the instability of the mobile collaborative robot is transmitted to the collaborative mechanical arm when the mobile collaborative robot passes through an uneven road due to the rigid connection between the mobile collaborative robot and the collaborative mechanical arm, thereby affecting the stability of the collaborative mechanical arm is solved.

The application discloses a kind of STK account material self-checking and abnormal self-healing method based on equipment state comparison, belongs to industrial automation control and intelligent warehousing technical field, and the specific steps of the self-healing method are as follows: I: the real-time state data of each device is collected and preprocessed, and according to each state data after processing, the health degree score and state entropy value of each device are calculated;The present application can identify the sub-health and unstable state of equipment in advance, which not only ensures the production safety in case of serious failure, but also avoids unnecessary downtime caused by slight abnormalities, significantly reduces the abnormal interruption in the task execution process, and improves the accuracy and traceability of material management;At the same time, the present application can find potential problems in advance, avoid task out-of-order execution, dependency conflict and deadlock problem, effectively prevent the preemption of concurrent tasks on process resources, and significantly optimize Crane walking path, reduce the overall energy consumption of warehouse, and greatly shorten the abnormal processing cycle.

This invention relates to an autonomous navigation method for unmanned aerial vehicles (UAVs) based on attractive manifolds, belonging to the field of UAV navigation and automatic control technology. It solves the problems of incomplete functionality, low control accuracy in unstable states, slow response speed, high implementation difficulty, large computational and information requirements, low scalability, low robustness, and low flexibility in existing technologies. This invention adjusts the operating mode of the control system based on the real-time detected relative distance between the UAV and obstacles, while considering path tracking, collision avoidance, and the UAV's dynamic characteristics. It can adapt to various complex environments and improve the safety and reliability of UAVs in practical applications. It features faster response speed, lower implementation difficulty, less computational load, and fewer information requirements; it also has better adaptability to changes in model parameters, exhibiting scalability, robustness, and flexibility, and a smoother motion trajectory.

The application provides a device stability analysis method and system, a device and a storage medium, and comprises the following steps: acquiring an action time difference of the same action of different types of products of the same device; calculating a statistical value of the action time difference, wherein the statistical value comprises one or more of an average, a mode, a median and a standard deviation; deriving an action stability index according to the statistical value; and comparing the action stability index with a preset stability index to determine the stability of the device. By comparing the action stability index value with the preset stability index value, it is determined that the device is in a stable state, a relatively stable state or an unstable state, and corresponding maintenance work is performed according to the obtained device stability state result.

The invention relates to the technical field of air source heat pump control, in particular to an air source heat pump energy efficiency optimization control method and system. The method comprises the following steps: acquiring multi-dimensional operation data of the air source heat pump unit and performing queue preprocessing to obtain a time sliding window data sequence of each physical quantity; according to the environment temperature and coil pipe temperature data in the sequence, the environment thermal response fluctuation representing the current environment unstable state is calculated; according to the exhaust temperature, the compressor current real-time value and the corresponding benchmark reference value, a system state deviation index representing the physical performance degradation of the unit is calculated; and calculating the frequency compensation amount based on the two indexes and the return water temperature difference, and superposing the frequency compensation amount to the basic PID frequency to obtain the final driving frequency. The energy efficiency self-adaptive maintenance of the whole life cycle is realized, the system oscillation under the severe working condition is effectively inhibited through a dynamic damping mechanism, and the operation stability and the energy-saving effect of the heat pump unit are improved.

The application discloses a method and device for determining a stall current. The method comprises: obtaining a current analog signal generated by a motor for controlling a target slidable door / window to slide from an electronic control unit; segmenting the current analog signal according to a preset time window, and determining a target state based on a variation degree of the current analog signal in each time window, wherein the target state comprises a stable state or an unstable state; determining that the motor enters a stall state when the target state of the current analog signal in any two adjacent time windows is converted from the unstable state to the stable state; and collecting the current generated by the motor to obtain the stall current.

The utility model discloses a kind of auxiliary fixtures of crankshaft pulley installation, belong to fixture technical field, including plugging resistance block, the lower portion of plugging resistance block is provided with positioning suction cup, the side of plugging resistance block is provided with anti-deviation guide mechanism, anti-deviation guide mechanism includes first support arm, second support arm and pulley center column, first support arm and second support arm are slidably connected in the side of plugging resistance block, second support arm is set in the side of first support arm, pulley center column is set in the lower portion of first support arm and second support arm;The utility model is cooperated with positioning suction cup by plugging resistance block, plugging resistance block and crankshaft keyway wall body cooperate to exert the force of pressing against flat key, change the unstable state that traditional flat key only relies on itself and keyway gap cooperation, in pulley push-in process, the impact of axial thrust to flat key can be effectively counteracted, avoid flat key sliding or falling off to engine interior, guarantee installation reliability.

The invention relates to a multi-device data storage method and a storage device. The method comprises the steps of determining a power supply state according to the stability of a power supply curve, triggering a breakpoint continuous writing mechanism when the power supply state is judged to be an unstable state, starting a cache structure when the power supply state is judged to be a stable state, and calling a difference comparison algorithm when it is detected that multiple devices access the same target file, comparing the current version and the historical version of the target file block by block, extracting differential data blocks, selecting a storage strategy according to the file type of the target file after multi-device access processing is completed, adopting a segmented streaming write-in strategy when the target file is a video file, and adopting a segmented streaming write-in strategy when the target file is a drawing file. And establishing a redundant index and recording key node positions in the target file, and when the target file is a document file, executing a lightweight encryption algorithm and generating an access log. The method has the advantage that the data storage and synchronization efficiency is improved.

The utility model relates to the technical field of dynamic weighing, and discloses a high-speed shaft group type dynamic weighing system, which is arranged on a driving lane of a target vehicle to be weighed, is used for weighing the target vehicle passing through the lane at a high speed, and comprises a plurality of loaders, the multiple loaders are perpendicular to the driving direction of a target vehicle on the lane, cover the two sides of the lane at the same time and are used for bearing wheels on two or more axles passing through the target vehicle at a high speed and weighing the two or more axles borne by the loaders; when a target vehicle passes through the weighing system layout area at a high speed, at least two or more axles of the target vehicle can be located on the loader at the same moment or within a time period. Two or more axles are weighed, and the influence of unstable states such as bumping and jumping in the vehicle driving process on the weighing result of a single axle is effectively reduced.

The utility model discloses a cathode baffle of magnetron sputtering equipment, which comprises a vacuum chamber, at least two magnetron sputtering cathodes and two first side baffles, the at least two first side baffles are respectively positioned on the outer sides of the two magnetron sputtering cathodes and are fixedly connected to the inner wall of the bottom end of the vacuum chamber, and the cathode baffle further comprises a shielding mechanism, a first baffle plate and a second baffle plate, the shielding plates are positioned on two sides of the two magnetron sputtering cathodes and in the middle of the two magnetron sputtering cathodes, are used for shielding the top ends of the magnetron sputtering cathodes and between the two magnetron sputtering cathodes, and have deformability; the loading mechanism is connected with the shielding mechanism; the cathode baffle plate of the magnetron sputtering equipment disclosed by the utility model has deformability, so that cross contamination of adjacent target materials is prevented, and the sputtering effect can be prevented from being influenced by an unstable state when sputtering is just started.

The invention discloses a method for judging the failure of a converter bottom lance, which comprises the following steps of: 1) calculating the gas permeability index a of a circular seam of the bottom lance after the tapping of the converter is finished, and if a is greater than 0.2, considering that the state of the bottom lance is normal; if a is less than or equal to 0.2, calculating the air permeability index fluctuation stability S, and if S is less than or equal to 0.04 and 3-5 heats are continuously reached, carrying out the following step 2); 2) measuring the thickness of the refractory material at the bottom of the furnace for a plurality of melts, and calculating the average erosion rate E and the average erosion depth delta h of the refractory material; (3) if the average erosion rate E is larger than or equal to 2.0 mm / furnace, and the average erosion depth delta h is larger than or equal to 250 mm, it is judged that the bottom lance fails; if the average erosion rate E is less than or equal to 1.5 mm / furnace and the average erosion depth delta h is less than 120mm, judging that the bottom lance is normal; otherwise, judging that the bottom gun is in an unstable state. According to the method, the failure time of the bottom gun can be accurately judged, so that plugging measures can be taken in time, and bottom gun burn-back and bleed-out accidents are prevented.

This invention provides a strong-attraction tool fixing structure using multiple bar-shaped magnets equipped with magnetic waist clips. [Solution] The strong-suction tool fixing structure 1, equipped with a magnetic waist clip and multiple bar magnets, includes a support body 10, multiple magnetic adsorption members 20, and a metal member 30. The multiple magnetic adsorption members are installed on one side of the support body and arranged along the longitudinal direction of the support body, while the metal member is coupled to the other side of the support body and forms a relative positional relationship with the multiple magnetic adsorption members. The invention is used to fix the tool to the user's clothing, waist belt, or other support location. The above-described structural arrangement allows long metal tools to be attracted and fixed along the arrangement direction of the multiple magnetic adsorption members, reducing the unstable state that may occur with fixing at a single point of attraction. The structural design of the multiple bar magnets 21 and the magnetic waist clip provides a tool fixing structure suitable for long metal tools, achieving both convenience in use and stability of fixation.

The invention provides a plate spring assembly used for a suspension system and a vehicle, the plate spring assembly used for the suspension system comprises a plate spring, spring eyes are arranged at the two ends of the plate spring; the protection assemblies are connected with the plate spring, part of the protection assemblies are located on the lower side of the plate spring in the thickness direction and extend in the length direction of the plate spring, the other part of the protection assemblies are bent at the two ends of the plate spring towards the side where the top face of the plate spring is located to form limiting spaces, and the spring eyes are located in the corresponding limiting spaces. According to the technical scheme, when the plate spring is fractured, the guiding function of the plate spring is not lost immediately through supporting and guiding of the protection assembly at the moment of fracture, the unstable state of a vehicle in the running process is effectively prevented, and the problem that in the prior art, when a single leaf spring of a suspension system is fractured, the safety of the vehicle is reduced is solved.

The disclosure relates to network interface (1; 100) including a first network connector (3), a second network connector (4), and a connector-to-connector bypass unit (20). The bypass unit (20) includes a monostable switching unit (30) for enabling a bypass connection between the first network connector (3) and the second network connector (4) in a stable state and for disabling the bypass connection in a non-stable state. In order to exhibit a high flexibility in use, the bypass unit (20) further includes a bistable switching unit (40), wherein the bistable switching unit (40) breaks, in a breaking state, the bypass connection. The disclosure further relates to an automation controller module (200) with such a network interface (1; 100).

The invention discloses an engine supercharging control method and system, a storage medium, equipment and a vehicle, and relates to the technical field of vehicles. The method comprises the steps of obtaining a related pressure value, a fault mark and a state mark of an engine; when it is determined that no fault exists in a supercharging control system corresponding to the first side air cylinder according to the fault mark, and it is determined that the engine is subjected to the idling process and started successfully according to the state mark, whether the supercharging function needs to be involved or not is judged according to the related pressure value; and if yes, the supercharging function intervention signal is transmitted to a second electronic control unit of the second side air cylinder, and supercharging control is conducted on the engine after the supercharging function intervention signal transmitted by the second electronic control unit is received. Therefore, it can be ensured that the supercharging function is allowed to be activated only after the engine enters the stable operation state, false triggering in unstable states such as the starting moment is avoided, meanwhile, coordination and consistency of the supercharging functions on the two sides of the engine are ensured, and the stability and efficiency of the engine are improved.

The invention relates to the technical field of temperature monitoring, in particular to a fault early warning method and system based on motor temperature monitoring, and the method comprises the steps: obtaining operation data including the motor winding temperature, the environment temperature and a load current effective value; a temperature rise abnormal factor is calculated, and the temperature rise abnormal factor is in positive correlation with the difference value of the motor winding temperature and the environment temperature and is in negative correlation with the product of the square of the load current effective value and the preset motor thermal resistance. According to the method, a local density fluctuation factor is introduced to carry out adaptive correction on distance measurement in a traditional LOF (local anomaly factor) algorithm, and the local density is adjusted by using fluctuation stability (variance) in a data point neighborhood, so that data points which are not greatly deviated in a fault evolution period but are in an unstable state are endowed with lower density values; therefore, the sensitivity of the algorithm to the slow evolution type initial fault of the motor is obviously improved, and the missing report rate is reduced.

An advanced electric vertical takeoff and landing (eVTOL) aerial vehicle, comprising an articulated annular wing structure integrated with distributed propulsion units, gyroscopic torque stabilization, and a guidance, navigation, and flight control system. The annular wing dynamically adjusts in flight to maintain payload stability, reduce stress on structural components, and mitigate passenger motion discomfort. A pseudo-centripetal force system, actuated by multi-axis mechanisms or an intelligent pulley assembly, is configured to counteract destabilizing forces during emergency landing scenarios. The aerial vehicle further includes a modular airframe architecture adaptable to multiple mission-specific configurations. Flight performance is optimized in real time using reinforcement learning algorithms. The system further comprises fail-safe mechanisms for rapid recovery from instability and includes integrated emergency and cybersecurity features to ensure operational safety. The disclosed VTOL vehicle provides enhanced stability, reliability, and versatility for applications including cargo transport, urban air mobility, environmental monitoring, emergency response, and agricultural operations.

The application discloses a kind of guided weapon autopilot control parameter automatic design method.The application can greatly improve the design efficiency of autopilot control parameter, and speed up the design and development progress of guided weapon control system.The application first selects feature points on uncontrolled trajectory, then builds particle model at each feature point, and independently designs the autopilot control parameter at each feature point;The application gives the typical structure of overload autopilot and attitude autopilot, and the designer can transform into appropriate autopilot structure by parameter setting according to specific needs;Then by obtaining the open-loop and closed-loop transfer function of the inner and outer loops of the autopilot, the static stability at the feature point is automatically determined, and a correction network is added to the static unstable state;Finally, the autopilot inner and outer loop control parameters are automatically designed based on frequency domain performance and time domain performance.The actual project flight verification has good engineering application effect.

The invention relates to the technical field of intelligent safety monitoring, in particular to a chemical laboratory risk early warning method and system based on a multi-modal data fusion algorithm. According to the chemical laboratory risk early warning method and system based on the multi-modal data fusion algorithm, space gradients of multi-modal data such as gas concentration and temperature are calculated, and the coupling relation and time delay between the gradients are analyzed; the method achieves the deep insight of the dynamic change of the laboratory environment, does not depend on isolated single-point threshold judgment, but evaluates the stability according to the cooperative phase of the heat diffusion and wet flow processes, can effectively recognize the potential unstable state caused by the combined action of multiple factors, and can effectively recognize the unstable state even if each single parameter does not reach the alarm limit value. According to the method, the risk can be captured in advance, the germination of the risk can be captured in advance, and meanwhile, the spreading trend and the influence range of the risk can be revealed by performing aggregation analysis on the spatially adjacent unstable areas, so that more accurate and prospective early warning is generated, and false alarms caused by non-dangerous instantaneous fluctuation are remarkably reduced.

A computer-implemented method is disclosed for determining optimal operational parameters for a model predictive controller (MPC) for vehicle control. The method includes training a machine learning model by simulating vehicle operations across a range of operational parameters using an MPC framework. The simulation identifies ranges of parameters that recover the vehicle from unstable states, with the bounds corresponding to the vehicle's performance envelope. The method comprises determining an optimum value for a vehicle parameter based on the simulation output, updating training data accordingly, and revising the vehicle's control system using the optimum value to control the operation of an actuator for a particular maneuver. The system may update the parameter set in response to changing vehicle or environmental conditions and supports both autonomous and human-in-the-loop operation. Also disclosed is a vehicle comprising a processing component configured to implement control inputs based on optimized parameters generated via vehicle simulation.

This utility model relates to the field of children's product technology and discloses a panda-shaped modular children's self-discipline check-in device, including a shell and a check-in sheet. The check-in sheet is slidably connected inside the shell. Multiple slots are formed inside and outside the shell. Multiple recording blocks are slidably connected inside the shell. Each recording block has a limiting slot inside. Multiple limiting components are provided inside the shell, each including a connecting block. The outer wall of each connecting block is fixedly connected to the inside of the shell, and a slider is slidably connected inside each connecting block. In this utility model, the sliding limiting slot helps children record the number of check-ins. When the limiting slot slides, it squeezes a limiting ball, driving the limiting ball to slide into the connecting block, thereby preventing check-in confusion. This solves the problem of task recording confusion caused by unstable status in existing check-in devices and improves the clarity and efficiency of children's self-discipline management.

The application relates to a loader running stability analysis method and system, which comprises four key links: real-time monitoring and critical threshold calculation, virtual potential field construction and threshold correction, unstable state determination and active intervention strategy, the links form a closed loop control, effectively solve the defects of the traditional method, such as reaction lag and poor adaptability, the core lies in dynamic adjustment of a critical inclination threshold value, the critical inclination threshold value is corrected in real time through a virtual potential field, through calculation of a mass potential barrier and a sliding vector, key factors such as a shovel load and wheel slip are brought into a stability evaluation system to correct the critical inclination threshold value, the stability limit of the loader under different road conditions and in different postures can be more accurately reflected, the lag problem of the traditional fixed threshold method is avoided, and finally, the shovel posture adjustment is used as a priority stability compensation means, and combined with speed regulation, the side turning risk can be reduced through rapid response in the initial stage of body instability.

This invention provides a construction method for supporting large-section tunnels under unstable slope conditions. The method includes dividing the tunnel into four zones based on the spatial relationship between the unstable landslide surface and the large-section tunnel; before tunnel excavation, driving anti-slide piles on both sides of the target tunnel entrance; reinforcing the unstable landslide body on the sliding surface with NPR anchor cables, avoiding the target tunnel; drilling grouting holes in Zone I for grouting; constructing pipe roof support for the tunnel; using a combination of denser NPR long anchor cables and NPR short anchor cables for support on the upper and lower steps of Zone I, with the arch of Zone I within the pipe roof support range; using denser NPR long anchor cables for support on the arch of Zone II; using NPR long anchor cables for support in Zone III; and using ordinary support methods or NPR short anchor cables for support in Zone IV. This construction method transforms the slope from an unstable state to a stable state and greatly improves the support effect of large-section tunnels under unstable slope conditions.

This application relates to a control method, apparatus, computer equipment, storage medium, and computer program product for a sweeping robot. The method includes: when the pressure sensor detects a collision feedback signal, acquiring the time-of-flight information of the ultrasonic signal to the ground via a first ultrasonic sensor; and acquiring gyroscope information corresponding to the gyroscope signal via a gyroscope; determining whether the sweeping robot body is in an unstable state based on the time-of-flight information and the gyroscope information; if the sweeping robot body is in an unstable state, determining that the pressure sensor does not generate a false alarm. This method can improve the accuracy of data processing of the pressure sensor signal by the sweeping robot's main control unit.

This invention relates to the field of plasma spectral detection technology, specifically providing an adaptive control method for the spectral detection of liquid cathode glow discharge. The method includes: real-time acquisition of multimodal state data of the discharge process, inputting this data into a pre-trained stability evaluation model, and outputting a stability score that quantitatively characterizes the discharge state. The score is compared with preset first threshold, second threshold, and fault threshold: if the score is ≥ the second threshold, a stable state is determined and spectral acquisition and analysis are triggered; if the score is between the first and second thresholds, a critically stable state is determined and monitoring continues; if the score is between the fault threshold and the first threshold, an unstable state is determined and at least two discharge parameters are coordinated and adjusted until stability is restored; if the score is ≤ the fault threshold, a fault state is determined and a maintenance alarm is triggered. This invention significantly improves the detection stability and automation level under complex operating conditions.

The invention discloses a railway flat plate transportation tightness monitoring method and system, relates to the technical field of transportation tightness experiments, and aims to solve the problems that railway cargo tightness monitoring mainly depends on traditional manual inspection and static mechanical analysis and has the following limitations that manual inspection is low in efficiency and depends on visual inspection or manual tension test; and real-time state monitoring in a dynamic vibration environment cannot be covered. The invention provides a railway slab transportation tightness monitoring system. The railway slab transportation tightness monitoring system comprises a tension monitoring module, a vibration monitoring module, a signal conversion module, a wireless data transmission module and an upper computer, monitoring data of the tension monitoring module and the vibration monitoring module are converted through the signal conversion module to obtain transmission data, the wireless data transmission module transmits the transmission data to an upper computer, an early warning threshold value is obtained through calculation according to the transmission data, and when it is judged that the two-axis scaling vehicle is in an unstable state through a monitoring curve of the transmission data, the early warning threshold value is sent to the upper computer. And the upper computer outputs a correction signal and an alarm signal.