24results about How to "Avoid saturation" patented technology

The invention discloses an airborne equipment acceleration monitoring and outrange control method and system, which cover acceleration monitoring of the whole flight process, combine dynamic scene modeling and a hierarchical response mechanism, and can timely identify an abnormal state and start corresponding measures. Through system calibration, noise identification, dynamic filtering, mistaken touch prevention parameter setting and a collision algorithm, false alarm and missing alarm caused by vibration, impact or sensor faults are effectively avoided, double modes of automatic collision detection alarm and manual triggering alarm are supported, the flexibility and safety of the system are improved, and once it is confirmed that the system is in distress, the system is safe and reliable. Rescue signals including position, time, height and other key information can be automatically sent, and the emergency response time is remarkably shortened.

This invention relates to the fields of computer data processing and database technology, specifically to an intelligent search system for business objects based on metadata. The system includes: a context request parsing module: receiving abstract search requests and extracting environment parameters and permission features to generate a dynamic context snapshot; a logical structure construction module: combining snapshot execution rule injection operations to generate a logical abstract syntax tree containing implicit filtering conditions; a multi-dialect compilation and execution module: translating the syntax tree into physical execution statements matching the target storage engine dialect according to physical mapping rules; and an adaptive optimization feedback module: monitoring execution latency data and dynamically correcting the index strategy definition. This invention solves the maintenance bottleneck caused by the tight coupling between business logic and physical storage in heterogeneous data source environments, achieving zero-code modification and hot deployment of business logic.

The application discloses a predefined time sliding mode control method of a Mecanum wheel robot, wherein a main controller controls input size and converts the input size into required voltage size to control a motor driving circuit in the form of a pulse width modulation waveform and interacts with an upper computer through Bluetooth; a radar and a six-axis acceleration sensor collect pose information including X-axis Y-axis position information and yaw angle information; an encoder collects direct current motor angular velocity information; the motor driving circuit converts the pulse width modulation waveform signal into a voltage signal to control the direct current motor rotating speed; S10, the radar, the six-axis acceleration sensor and the encoder collect motion parameters of the Mecanum wheel robot; S20, the main controller calculates an expected pose and an actual pose error; S30, the value of a sliding mode variable is updated; and S40, a sliding mode control input is updated. The application can realize faster convergence speed with smaller control input, and the actuator saturation phenomenon is avoided while the convergence speed is improved.

The utility model relates to the technical field of moisture-proof medicine bottles, in particular to a replaceable moisture-proof medicine bottle which comprises a medicine bottle assembly and a replacement assembly. The medicine bottle assembly comprises a medicine bottle body and a bottle cap. A circular opening a is formed in the bottom of the medicine bottle body, the inner wall of the circular opening a is connected with a lower damp-proof plate, and a circular through hole b is formed in the bottle cap and connected with an upper damp-proof plate. The replacement assembly is connected to the medicine bottle assembly; the replacement assembly comprises a bottom shell, a connecting thread a, a moisture-proof agent bag a, an adjusting piece a, a top shell, a connecting thread b, a moisture-proof agent bag b and an adjusting piece b; the bottom shell is connected to the outer wall of the medicine bottle body through a connecting thread a, and the bottom shell is hollow and connected with a moisture-proof agent bag a and an adjusting piece a; the top shell is connected to the outer wall of the bottle cap through connecting threads b, and the interior of the top shell is hollow and connected with a moisture-proof agent bag b and an adjusting piece b. The replaceable moisture-proof medicine bottle can be conveniently adjusted according to the use environment of the medicine bottle, the used through holes are adjusted, and the practicability of the replaceable moisture-proof medicine bottle is conveniently improved.

This invention discloses a method and system for processing atomic operations in a cache. The method involves, upon receiving an atomic operation request containing a target address and bus operands, temporarily storing the bus operands in the bus storage area. It then searches for the stored operands in the last-level cache based on the target address. If not found, it requests to read them from memory and transfers the bus operands from the bus storage area to an auxiliary storage area. After receiving the stored operands from memory, it reads the bus operands from the auxiliary storage area. Finally, it performs an atomic operation on the bus operands and the stored operands to obtain the operation result. This method, upon detecting that the stored operands cannot be read from the last-level cache, transfers the bus operands to the auxiliary storage area to wait, thereby releasing the storage resources of the bus storage area and preventing storage resource saturation due to memory access latency. This improves the throughput and processing efficiency of atomic operations in high-concurrency scenarios.

The invention discloses an LNA (low noise amplifier) with high gain flatness and multi-band adjustment for aerospace information acquisition. Comprising a first low-noise amplification module, a first radio frequency switch, a first filtering module, a second radio frequency switch, a first adjustable attenuation module, a second low-noise amplification module, a second adjustable attenuation module, a third low-noise amplification module, a third radio frequency switch, a second filtering module and a fourth radio frequency switch which are connected in sequence. Each of the first filtering module and the second filtering module comprises a plurality of signal paths with different frequency response characteristics; a signal path of the first filtering module comprises an equalizer and a band-pass filter, and a signal path of the second filtering module comprises a band-pass filter; and the first radio frequency switch, the second radio frequency switch, the third radio frequency switch and the fourth radio frequency switch are used for selecting signal paths, so that the technical problems that in the prior art, extremely low noise and high and flat power gain are difficult to maintain in a wide frequency band, and switching in different frequency bands cannot be flexible are solved.

This invention relates to the field of coatings, specifically to a wear-resistant, formaldehyde-removing artistic coating and its preparation method. The coating, by weight, comprises: 45-55 parts of waterborne polyurethane-modified acrylic emulsion, 15-25 parts of silane-modified filler, 4-8 parts of supported formaldehyde-removing filler, 6-12 parts of pigment, 0.2-0.6 parts of dispersant, 0.1-0.4 parts of defoamer, 0.3-0.8 parts of thickener, 1-3 parts of film-forming aid, and 15-25 parts of deionized water. This invention achieves a balance between film hardness and toughness by using waterborne polyurethane-modified acrylic emulsion as the film-forming substance and combining it with silane-modified filler. The polyurethane segments provide excellent flexibility and resilience, the acrylic segments provide high hardness, and the silane-modified filler forms a strong chemical bond with the resin matrix through a silane coupling agent, improving the overall performance of the coating and extending its service life.

The invention discloses an ambient light elimination method, a light detection sensor and a system, and belongs to the technical field of proximity light sensors. In the calibration stage of the sensor, a current compensation module dynamically adjusts compensation current according to a compensation control signal output by an error amplification module, counteracts a current signal generated by ambient light and establishes a compensation state; in the detection stage, the current compensation module keeps the established compensation state, so that the compensation current continues to offset the ambient light current, and the integrator module only carries out integration on the current corresponding to the target light signal. According to the invention, a method for later compensation depending on digital signal processing and a digital-to-analog converter in a traditional scheme is abandoned, a front-end analog direct elimination mechanism is provided, ambient light current is directly offset through an analog feedback loop in an initial stage of a signal chain, namely before analog-to-digital conversion, and delay and precision limitation caused by digital processing are avoided.

The invention relates to the technical field of vehicle-mounted optical imaging, in particular to a vehicle-mounted lens partition exposure scheduling and glare suppression imaging method, which comprises the following steps of: S1, acquiring original environment light field distribution information in front of a driving vehicle, and acquiring a glare suppression image based on the original environment light field distribution information; identifying an intense light source area in a view field range and a conventional area except the intense light source area; s2, on the basis of the identified strong light source area, generating a dynamic partition control instruction, according to the dynamic partition control instruction, performing view field segmentation on the light sensing surface of the imaging sensor, distributing a first exposure time period for the strong light source area, and distributing a second exposure time period for the conventional area, wherein the duration of the first exposure time period is smaller than that of the second exposure time period; according to the invention, through the deformable lens array, strong light spots which are originally projected to the center of the light-sensitive surface to cause overexposure are deflected or scattered, so that saturation caused by the fact that the pixel units on the light-sensitive surface receive excessive light energy is fundamentally prevented.

The application discloses a kind of double-stator permanent magnet motor multi-objective optimization design method and motor considering multiple working conditions performance, according to multiple operating modes of double-stator permanent magnet motor and corresponding torque, efficiency demand, determine the design parameters of inner and outer stator and rotor and multi-working condition optimization target;Establish initialization finite element simulation model, collect data by uniform sampling to design parameters and optimization target, carry out correlation analysis and according to the result, eliminate the parameters with low correlation;The conflict relationship between optimization targets is analyzed using the aggregation tree algorithm, representative targets are extracted, and the target dimension reduction is completed;The reduced data is used to train a proxy model, and the proxy model is applied to a multi-objective optimization algorithm to optimize the motor performance.Finally, the motor design scheme is simulated and evaluated.The application solves the problem of excessive design parameters and optimization targets caused by multiple working conditions and complex motor structure of double-stator permanent magnet motor, and improves the optimization efficiency while improving the comprehensive performance.

This invention discloses a zero-space method for pre-set time trajectory tracking and obstacle avoidance of a two-wheeled differential vehicle, belonging to the field of mobile robot navigation and cooperative control technology. It includes: 1) establishing a kinematic model of the two-wheeled differential vehicle and clarifying the mapping relationship between the vehicle's linear velocity, angular velocity, and body motion; 2) constructing a zero-space multi-task priority control framework, defining obstacle avoidance as the highest priority task and trajectory tracking as the second-priority task; 3) integrating the pre-set time control with the second-priority trajectory tracking task, introducing a practical pre-set time gain to design a pre-set time control law, enabling the vehicle to accurately track the trajectory within a preset time; 4) fusing the desired obstacle avoidance velocity with the desired trajectory tracking velocity after zero-space projection, outputting executable linear and angular velocity commands for the vehicle body; and 5) conducting ideal working condition algorithm simulation in MATLAB. This invention effectively improves the system's safety and motion smoothness.

The invention belongs to the technical field of autonomous underwater vehicle control, and particularly relates to an actuator saturation fault-oriented AUV fault-tolerant control method, a program, equipment and a storage medium. According to the method, the saturation control item is introduced into the fault compensation of the AUV, the redundancy characteristic of the hybrid actuator can be fully utilized, the force and torque redistribution under the fault is realized through the dynamic fault distribution matrix, and the saturation of the actuator is inhibited by means of the saturation error item of the Lyapunov function. On the premise that the trajectory tracking precision is not lost, the recovery time after a fault is greatly shortened, the output fluctuation of the actuator is reduced, the saturation risk is avoided, the control reliability and stability of the AUV under the fault working condition are remarkably improved, and the situation that the AUV is lost due to the fault generated by saturation of the actuator can be effectively reduced.

The utility model discloses an air drying device for a pelletizer, and relates to the technical field of pelletization of the pelletizer, the air drying device comprises a rack for bearing plastic strips to move, roll shafts for guiding the plastic strips are arranged at the two ends of the rack, and an air bellow for air drying of the plastic strips is arranged at the position, below the plastic strips, of the rack. And a fan communicated with the air bellow is arranged on the outer side of the air bellow. Roll shafts for guiding plastic strips are installed on the machine frame, when the plastic strips move, the roll shafts rotate to assist the plastic strips in moving and reduce the possibility that the plastic strips fall into the machine frame, an air bellow is arranged on the machine frame and located below the plastic strips, and a draught fan which is arranged on the outer wall of the air bellow and communicated with the air bellow is used for air drying of the plastic strips. And the possibility that the plastic strips are snapped during movement after being heated and dried by the drying device is reduced.

The application relates to a digital apron marker light power supply and a control method. When a dimmer is adjusted from low to high, the boost circuit adjustment bandwidth is effectively improved, so that the apron marker light brightness is constant when the dimmer shifts gears, the isolation transformer has a desaturation function when saturated, the saturation of the isolation transformer is effectively avoided, the regulator is accelerated to stabilize, the light brightness stability is ensured, and the normal lighting effect of the apron marker light is ensured.

The invention relates to a strong sunlight resistant APD type laminated laser detector and a manufacturing method thereof, and belongs to the field of photoelectric detector chips. The detector comprises two stacked sub-detectors, the sub-detector I is arranged at the upper part, and the sub-detector II is arranged at the lower part; a filter film I is arranged on the sub-detector II; a bonding layer is arranged on the filter film I and is connected with the sub-detector I and the sub-detector II; the electrode II and the electrode III are provided with through holes so as to be interconnected with a peripheral circuit. The detector is packaged in a tube shell, a light window is arranged above the tube shell, a light filtering film II is arranged above the light window, and a light filtering film III is arranged below the light window. During packaging, the electrode II of the sub-detector I and the electrode III of the sub-detector II are in short circuit. Through optical and electrical design, sunlight currents generated by the two sub-detectors are mutually offset, and only laser signal currents are reserved.

The embodiment of the invention provides a touch signal detection circuit, a touch signal detection method and a touch position positioning method, and the touch signal detection circuit comprises an interference detection module, a touch detection module, a current copying module and signal channels corresponding to sensing units. The interference detection module is connected with the reference signal channel and is used for carrying out current detection on the reference signal channel to obtain interference current; the input end of the current copying module is connected with the interference detection module, the output end of the current copying module is connected with the touch detection module, the current copying module is used for copying interference current and injecting copied current obtained through copying into the touch detection module, and the direction of the copied current is opposite to that of the interference current; and the touch detection module is also connected with other signal channels except the reference signal channel and is used for carrying out touch signal detection on the connected signal channels. Active compensation of display interference is achieved, the anti-interference capacity and the signal sensitivity are both considered, and high-reliability and high-precision touch interaction experience is achieved.

This invention provides a method and apparatus for intelligent unmanned vehicle (UAV) platooning reconfiguration control based on an adaptive potential field, relating to the field of intelligent UAV platooning control technology. The method includes: acquiring environmental information and the state information of the intelligent UAV platoon; generating a critical adaptive potential field threshold through an adaptive potential field and calculating the desired position of each intelligent UAV in the platoon; generating continuous and bounded desired trajectory information using a fixed-time nonlinear filter; and using an anti-saturation fixed-time sliding mode controller to control each intelligent UAV to track the desired trajectory information within a fixed time period under actuator saturation, thereby achieving intelligent UAV platooning reconfiguration and fixed-time convergence control. This invention is applicable to scenarios such as intelligent transportation, environmental detection, and rescue operations, and can realize real-time platooning reconfiguration, obstacle avoidance, and fixed-time convergence control of intelligent UAV platoons in dynamic environments.

The invention discloses an unmanned aerial vehicle guaranteed cost constraint control method based on explicit reference adjustment, and belongs to the field of aircraft control. The implementation method comprises the following steps: introducing a fixed time disturbance observer in a position loop, and compensating lumped disturbance including contact force; designing an optimal guaranteed cost controller based on a linear matrix inequality as a position pre-stabilization feedback controller; an explicit reference adjustment is introduced to generate a position reference instruction proximate the target. In the attitude ring, a fixed time disturbance observer is introduced to compensate torque disturbance; designing a nonlinear robust controller based on geometric control as an attitude pre-stabilization feedback controller; and introducing explicit reference adjustment to generate an attitude reference instruction to adjust the attitude. The method can achieve the asymptotic tracking of the unmanned aerial vehicle on the original expected instruction during the whole limited contact task, guarantees that all states and input safety constraints are continuously satisfied, and has the advantages of anti-disturbance robustness, tracking performance superiority, constraint guarantee completeness and the like.

This invention discloses a method, system, and terminal device for attitude safety control of a flying car, relating to the field of flying car control technology. First, the invention establishes a flying car attitude dynamics model considering external disturbances. Second, it designs a preset performance function and error conversion mechanism to constrain attitude tracking errors within a preset performance envelope, ensuring transient and steady-state performance. It then constructs a time-varying asymmetric barrier Lyapunov function to transform the physical constraint of angular rate into a hard constraint on the control system. Finally, combining the disturbance estimate, the final attitude control torque is derived. This invention ensures that the attitude angle of the flying car converges quickly and with high precision when subjected to external disturbances, and effectively combines the attitude angle tracking performance with angular rate constraints, achieving dual-objective coordination in flying car control and effectively avoiding actuator saturation and flight instability.

The invention discloses a high-precision automatic docking control method and system for an airport scene boarding bridge, and relates to the field of automatic control of airport ground equipment. Aiming at the interference problems of flexible vibration and the like caused by variable structure inertia characteristics, nonlinear dynamic coupling and a composite environment long cantilever structure in the docking process of the boarding bridge, the method comprises the following steps: firstly, establishing a three-degree-of-freedom Euler-Lagrange dynamic model considering a telescopic coupling effect; secondly, constructing a data guide learning control framework, designing a smooth soft projection operator to process physical parameter constraints, and updating a physical parameter estimation value, a repetitive interference estimation value and a non-repetitive interference boundary on line by utilizing iterative domain process data; and finally, designing a control law in combination with an instruction filtering backstepping method, and introducing a robust damping term to suppress random interference.

The invention discloses a constant-temperature electronic nose system with self-adaptive flow control and a control method of the constant-temperature electronic nose system. The device comprises a gas source conditioning module, a constant-temperature gas chamber, a gas transmission module, a gas detection module and a control module, the gas source conditioning module comprises a filter and a mass flow controller, the constant-temperature gas chamber comprises a heat preservation shell, a sample container, a heater and a temperature sensor are arranged in the heat preservation shell, and the gas inlet end of the filter is connected with a first external carrier gas source; the air outlet end of the filter is connected with the air inlet end of the mass flow controller, the air outlet end of the mass flow controller is connected with an air inlet connector in the top of the sample container through a first connecting pipeline, and an air outlet connector in the top of the sample container is connected with the air inlet end of the air conveying module through a second connecting pipeline. The gas outlet end of the gas transmission module is connected with the gas inlet of the gas detection module. The carrier gas flow can be automatically adjusted according to the actual response of the gas sensor, and saturation of the gas sensor is avoided while the signal intensity is ensured.

The application provides a power control method, a photovoltaic inverter and a photovoltaic grid-connected system, and relates to the technical field of photovoltaic grid-connected power control. The method is applied to a photovoltaic grid-connected system, the photovoltaic grid-connected system comprises a photovoltaic inverter, and the output end of the photovoltaic inverter is connected with a power grid and a load. The output of the photovoltaic inverter is controlled through a power loop, and the power loop comprises a proportional term and an integral term. The power control method comprises the following steps: when it is detected that the required output power of the photovoltaic grid-connected system is less than a preset power threshold, a reduction operation is performed on the integral term; wherein the power threshold is not greater than the minimum active power of the load in all operating conditions of the photovoltaic grid-connected system; and the output power of the photovoltaic inverter is controlled based on the power loop after the integral term is reduced. The application can avoid the overshoot drop problem in the power rise control process after the small power control of the photovoltaic grid-connected system, and can improve the stability of the photovoltaic grid-connected system.

The invention provides a gas purification treatment device in cattle slaughtering processing, which comprises a shell, a spraying structure is arranged in the shell, a waste water recovery structure is arranged on the lower side of the spraying structure, a water absorption structure is arranged in the shell, the water absorption structure comprises a water absorption box, a sponge is arranged in the water absorption box, and a pressing plate is arranged on the water absorption box. A first pressing frame is in sliding fit with the interior of the shell and makes contact with the pressing plate, an activated carbon box is arranged on the lower side of the water suction box, a plurality of scattering rods are rotationally matched with the interior of the activated carbon box, and a second pressing frame is in sliding fit with the interior of the activated carbon box. According to the gas purification treatment device in cattle slaughtering processing, water absorption and filtration treatment can be conducted through the sponge, so that saturation caused by excessive water absorption of activated carbon can be prevented, the service life of the activated carbon is prolonged, the activated carbon can be scattered through the scattering rods, the contact area of the activated carbon and waste gas is increased, and the service life of the activated carbon is prolonged. The purification effect of activated carbon on waste gas is ensured.

The present application belongs to the technical field of laser atmospheric remote sensing, and discloses a near-infrared rotational Raman polarization laser radar spectrometer and method. The received echo signals are divided into first and second echo signals, the first echo signals are filtered to obtain near-infrared rotational Raman signals with a first target wavelength, and the near-infrared rotational Raman signals with the first target wavelength are detected; the second echo signals are filtered, and the filtered near-infrared signals with a second target wavelength are divided into vertical and horizontal polarization signals; the vertical polarization signals are divided into vertical polarization high and low altitude signals, and the vertical polarization high and low altitude signals are detected respectively; and the horizontal polarization signals are divided into horizontal polarization high and low altitude signals, and the horizontal polarization high and low altitude signals are detected respectively. The present application can realize signal large dynamic range measurement and effective measurement of weak near-infrared band nitrogen-oxygen Raman scattering echo signals.