111 results about "Rate control" patented technology

The invention relates to the technical field of feeding amount control, in particular to an eccentric shaft grinding control method capable of avoiding workpiece collision, which comprises the following steps: in the process of grinding an eccentric shaft by a processing machine tool, acquiring the actual rotating speed of a grinding wheel at each moment in a preset local time period before the current moment and the actual feeding amount of the grinding wheel at the current moment in real time; calculating the rotating speed variation; determining the friction balance degree of the grinding wheel at the current moment; and the abrasion coefficient of the grinding wheel at the current moment is obtained, the adjusted feeding amount of the grinding wheel at the current moment is determined, and the feeding amount of the grinding wheel is controlled and adjusted through a control algorithm. The feeding amount of the grinding wheel is adjusted in real time, the feeding amount of the grinding wheel is controlled more accurately, collision and impact in the grinding process are effectively avoided, the risk of damage to workpieces and equipment is reduced, and the machining precision of the eccentric shaft is improved.

The invention discloses a high-frequency motor drive multi-rate control method for time sequence disturbance compensation, and the core principle of the method is that low-rate disturbance compensation and a reference tracking trajectory are improved and converted into a time sequence processing process matched with a high-rate control instruction; specifically, a single disturbance compensation value which can be known only at a sampling moment Ts is expanded into time sequence prediction of disturbance changes on N control points in the future through a generalized proportional-integral observer; meanwhile, a low-frequency single reference instruction is constructed into a smooth high-frequency reference trajectory covering N control points through a Lagrange interpolation method, and closed-loop correction of disturbance compensation and reference tracking is achieved on each high-frequency control point Tc. The problem that open-loop prediction errors are continuously accumulated and spread due to mismatching of information updating rates in traditional multi-rate control is fundamentally solved, and therefore high-precision robust control over the high-frequency motor driving system is achieved.

The invention belongs to the technical field of flight control. The invention provides a specified time increment control method for an aircraft airflow angle under multi-fault interference. The method comprises the following steps: establishing an airflow angle and angular rate kinetic equation of an aircraft and converting the equation into a strict feedback linearization form; performing first-order Taylor expansion on the kinetic equation at the current sampling moment, and establishing a control-oriented incremental model; a specified time airflow angle controller and a specified time angular rate controller of an aircraft are designed based on a control-oriented incremental model and a specified time theory, and specified time control over the airflow angle of the aircraft is achieved. The embodiment of the invention has the advantages of simple structure and strong robustness, only needs the state differential measurement information and the control surface control derivative of the airplane, effectively reduces the dependence on the precise nonlinear term in the airplane model, and can still realize the precise airflow angle control at the specified time even under multiple faults.

An electronic gaming machine (EGM) includes a processor that achieves a designated RTP by providing a game feature that randomly awards one or more metamorphic feature types within a single spin. Additionally, the game feature that randomly awards one or more metamorphic feature types may be based on a triggering mechanism. The EGM utilizes different weight tables, reel strips, or a combination thereof depending on how the game triggers the game feature. For example, the game may trigger the game feature based on a base game outcome (e.g., 3SCAT, 4SCAT, and / or 5SCAT), a random feature trigger, the buying of an instant feature, or a combination thereof. Based on the triggering mechanism used, the game may have different probabilities in triggering one or more of the metamorphic feature types for a single spin.

To control the rate of a mechanical watch with high precision. [Solution] In mechanical watches, A sensor detects the vibrations of the balance, and the cumulative frequency is compared with the clock cumulative frequency of the reference oscillator to calculate the rate error. Based on this error, a control method is determined, and mechanical energy is injected into the balance by an actuator to control the rate. For even more precise control, abnormal vibrations are recorded to evaluate the reliability of the measurements and adjust the control strategy accordingly. In addition, if sensor detection is difficult, it is supplemented by phantom counts estimated from the reference oscillator. If necessary, it is also possible to identify external factors using auxiliary sensors. When high reliability is required, sensors with different detection principles can be duplicated and cross-verified. This configuration enables implementation at various levels, from basic rate control to advanced adaptive control.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a server device may receive, during a first time window, information indicating a plurality of client round-trip times (CRTTs) associated with a client device. The server device may compute a plurality of network round-trip times (NRTTs) based at least in part on the plurality of CRTTs, each NRTT in the plurality of NRTTs corresponding to a respective CRTT in the plurality of CRTTs. The server device may compute one or more NRTT metrics for the first time window using the plurality of NRTTs. The server device may selectively adjust a bitrate used for a transmission to the client device based at least in part on a determination of whether the one or more NRTT metrics satisfy one or more NRTT metric thresholds. Numerous other aspects are described.

Methods and systems for rate control include determining an encoding parameter value to use for an input set of video frames based on a current channel capacity, using a machine learning model that accepts the input set of video frames and the current channel capacity as inputs. The input set of video frames are encoded using the encoding parameter to generate encoded video that has a bitrate below the current channel capacity. The encoded video is transmitted.

Implementations of the subject matter described herein provide a solution for rate control based on reinforcement learning. In this solution, an encoding state of a video encoder is determined, the encoding state being associated with encoding of a first video unit by the video encoder. An encoding parameter associated with rate control in the video encoder is determining by a reinforcement learning model and based on the encoding state of the video encoder. A second video unit different from the first video unit is encoded based on the encoding parameter. In this way, it is possible to achieve a better quality of experience (QOE) for real time communication with computation overhead being reduced.

The invention relates to a geometric parameter optimization design method for a large-overlap-ratio gear, and belongs to the field of vehicle transmission design. According to the technical scheme, the geometric parameter optimization design method for the large-overlap-ratio gear comprises the following steps that S1, initial parameters of a gear pair are determined according to the speed ratio requirement and the center distance; s2, dense tooth optimization is carried out according to the tooth root strengthening effect; s3, the addendum circle is determined according to the requirement of the sliding rate # imgabs0 #; s4, distributing tooth thickness according to fatigue life and backlash requirements; s5, determining a dedendum circle according to a top clearance requirement; and S6, performing tooth root transition curve optimization and hob design according to the re-determined gear parameters, and performing hobbing simulation verification. According to the scheme, gear tooth high-strength design and dense tooth optimization are achieved through a tooth root transition curve optimization method, the meshing efficiency and the transmission stability are further considered, the tooth height is controlled and optimized through the sliding rate, the tooth thickness and the backlash are distributed by balancing the fatigue strength of the paired gear, and the macroscopic geometric parameter optimization design of the gear is achieved.

Embodiments feature families of rate allocation and rate control methods that utilize advanced processing of past and future frame / field picture statistics and are designed to operate with one or more coding passes. At least two method families include: a family of methods for a rate allocation with picture look-ahead; and a family of methods for average bit rate (ABR) control methods. At least two other methods for each method family are described. For the first family of methods, some methods may involve intra rate control. For the second family of methods, some methods may involve high complexity ABR control and / or low complexity ABR control. These and other embodiments can involve any of the following: spatial coding parameter adaptation, coding prediction, complexity processing, complexity estimation, complexity filtering, bit rate considerations, quality considerations, coding parameter allocation, and / or hierarchical prediction structures, among others.

This invention discloses a control method and monitoring system based on a planned curve. The method includes: the monitoring system periodically issuing control commands to the controlled system based on the planned curve; the monitoring system receiving and collecting feedback from the controlled system in real time of the control rate, control target value, and actual electrical quantity values; the monitoring system monitoring in real time whether the planned curve is updated and whether the automatic control mode is engaged; in response to the planned curve update or the engagement of the automatic control mode, calculating the remaining adjustment time window and determining whether it is permissible to issue a temporary control command; in response to the permission to issue a temporary control command, determining whether there is an expected adjustment deviation; and in response to the existence of the expected adjustment deviation, determining the temporary control command and issuing it to the controlled system. This invention achieves immediate response of the control system after the planned curve is updated, automatic following after the planned curve is engaged, and post-adjustment of deviations in the control process, thereby improving the real-time performance and reliability of the planned curve control system's adjustment response.

The application discloses a code rate control method, a code rate control device and a computer storage medium. The code rate control method comprises the following steps: predicting the complexity of a current short-term regulation period; calculating the complexity bits of the current short-term regulation period based on the predicted complexity, the actual complexity of a previous short-term regulation period and the actual bits of the previous short-term regulation period; obtaining the buffer state of the current short-term regulation period, determining the buffer bits of the current short-term regulation period based on the buffer state; determining the target bits of the current short-term regulation period based on the complexity bits and the buffer bits; determining the quantization parameter of the current short-term regulation period according to the target bits, and encoding the video data in the current short-term regulation period by using the quantization parameter. In the foregoing manner, the regulation condition of adjacent short-term regulation periods is considered, and the state of the current short-term regulation period is also considered, so that the adaptability of the code rate control is improved while the accuracy of the code rate is ensured.

The invention relates to the technical field of speed control, in particular to a feed rate control method and system in numerical control machining based on data analysis, and the method comprises the steps: obtaining a vibration signal and a current signal in a machining process; calculating the cutting impact strength at each moment, wherein the cutting impact strength is positively correlated with the kurtosis of the amplitude of the vibration signal in the window corresponding to the moment and the logarithm of the absolute mean value of the current signal; and the instability index of each moment is calculated. According to the method, the penalty factor and the kernel function parameter can be adjusted in real time according to the instability of the machining process, high fitting precision is kept when the signal is stable, overfitting is prevented by reducing the penalty factor in the stage of severe abrasion and large noise, and therefore accurate prediction of the surface roughness is achieved, closed-loop correction is conducted on the feeding rate, and the precision of the surface roughness is improved. And the processing efficiency and the surface quality are effectively balanced.

The utility model discloses a rate adjusting device used in the slurry pumping process, and relates to the technical field of rate adjusting devices, the rate adjusting device used in the slurry pumping process comprises a slurry pump device, and the upper end of the slurry pump device is provided with a throttling device; a speed adjusting device is mounted at the upper end of the throttling device; according to the utility model, when the speed is adjusted, the arc-shaped baffle plate and the slurry outlet pipe are controlled to slide through the telescopic air cylinder, so that the overflowing area of the slurry outlet pipe can be accurately adjusted, and the flow speed of slurry can be flexibly changed to adapt to different working requirements; and a valve clack in the throttling device is matched with the speed adjusting device for use, so that the flow and the flow speed of the slurry are doubly controlled, and the speed control precision and reliability of the whole device in the slurry pumping process are improved.

In the context of additively manufacturing a solid object using extrusion deposition, closed-loop control of flow rate is achieved using a distance measuring tool to scan a surface of a layer that has been deposited using a first flow rate, comparing data from the scan to a desired target value and using a control algorithm to calculate a corrected second flow rate to be applied when depositing a subsequent layer. In some embodiments, the control algorithm is a proportional-integral control algorithm. In some embodiments, a solid object shape may result in some layers having multiple isolated regions and separate closed-loop control instances may be applied to the separate regions.

The invention discloses a rate control method and device, a communication node, a storage medium and a product. The rate control method comprises the following steps: acquiring the current time delay and the current throughput of a second communication node; processing the current time delay, the current throughput, the current time delay base line and the current throughput base line through a two-factor joint judgment model, and determining a control instruction; under the condition that the control instruction indicates rate control, target node information is determined, and the target node information indicates a communication node of which the transmission rate needs to be adjusted; and transmitting the control instruction and the target node information to a third communication node. According to the speed control method provided by the invention, the speed control accuracy is improved.

The application relates to the technical field of crushers, and provides a feeding speed control method for a crushing system and the crushing system, wherein the crushing system comprises a crusher and a feeding device, the feeding speed control method for the crushing system comprises the following steps: acquiring working parameters of a crushing chamber, the working parameters of the crushing chamber comprising a material level height in the crushing chamber and a material level change speed in the crushing chamber; acquiring a feeding state of the feeding device, the feeding state of the feeding device at least comprising a material height on the feeding device; and controlling a feeding speed of the feeding device according to the working parameters of the crushing chamber and the feeding state of the feeding device. In this way, the material level height and the material level change speed in the crushing chamber are direct and intuitive parameters for representing the working condition of the crusher, and the feeding speed can be adjusted in time and effectively in combination with the feeding state of the feeding device, so that the problem that the feeding speed of the feeding device cannot be controlled in time according to the working current of the crusher in the prior art is solved.

The present invention discloses a flow rate control mechanism, a flow rate control method, and an automatic loading and sorting device. The flow rate control mechanism and the flow rate control method divide the space in the silo into a buffer zone and an isolation zone, and provide a channel between the buffer zone and the isolation zone for items to enter the buffer zone from the isolation zone. The reciprocating movable part changes the boundary position of the isolation zone through periodic reciprocating motion, repeatedly shrinking or expanding the volume of the isolation zone, and pushing and disturbing the items in the isolation zone when the volume of the isolation zone is reduced. The present invention can reduce the number of items in the buffer zone, which is conducive to the smooth operation of the ejecting part and prevents the items from being squeezed and damaged. The reciprocating motion of the reciprocating movable part changes the boundary position of the isolation zone and pushes and disturbs the items in the isolation zone, which can avoid the phenomenon of stuck or hollowing in the reaction cup silo. The reaction cup can enter the buffer zone at a periodically changing flow rate, which is equivalent to the reaction cup flowing to the bottom of the silo at a constant speed.

The present application relates to a kind of control wide thin gauge 304 stainless steel rolling bias method, belong to reversible cold rolling technical field, solve the problem of roll system bias in the reversible cold rolling process of wide thin gauge 304 stainless steel, the present application proposes the control method of wide thin gauge 304 stainless steel rolling bias problem, this method involves pass and deformation rate control, rolling tension parameter control, and three aspects of shape control, strong system and practicality.After using the control method provided by the present application, the bias incidence rate is reduced from previous 10% to 0.5% or less, significantly improve the stability of stainless steel wide thin gauge cold plate rolling.

Controlling a bit rate for encoding a signal. The signal is encoded using at least two different encoding algorithms. A total bit rate is allocated to at least two components of the signal. A first component of the signal is to be encoded using a first encoding algorithm. A second component of the signal is to be encoded using a second encoding algorithm.

The application relates to the technical field of numerical control, in particular to a feed ratio control method of a numerical control system. The method comprises the following steps: acquiring current, power and vibration amplitude at each moment; acquiring an abrasion rate based on the collected parameters, the change characteristics of a grinding wheel and a feed speed; determining an optimal feed speed based on the abrasion rate change in a speed increasing interval; determining a real-time feed speed at each moment based on the abrasion rate difference and the abrasion rate growth rate in the corresponding speed increasing interval at the current moment; acquiring an adjustment interval and an optimal interval based on the speed change amount, and adjusting the real-time feed speed based on the abrasion rate difference of the two intervals to acquire a current optimal feed speed; acquiring an abrasion proportion coefficient based on the current optimal feed speed, and determining an optimal real-time feed speed by combining the current optimal feed speed; and controlling based on the optimal real-time feed speed. The application can adaptively adjust the feed ratio and improve the workpiece surface quality.

The invention relates to the technical field of bent pipe forming control, in particular to a bent pipe angle and thinning rate control method and system.According to the bent pipe angle and thinning rate control method and system, angle advancing quantity values and curvature change rate values are numbered according to steps to construct a continuous sequence, a time convolution network is introduced to conduct convolution calculation on the change amplitude among multiple adjacent steps, and therefore the angle and thinning rate of a bent pipe is obtained. Angle change and curvature change in the bending process are not judged as isolated parameters any more, conjoint analysis is carried out based on a time sequence incidence relation, a near-end strategy optimization algorithm is introduced to carry out proportion down-regulation on a bending speed value and a curvature change rate value corresponding to the current step, reverse angle offset is synchronously superposed, and the bending speed value and the curvature change rate value corresponding to the current step are calculated. Parameter adjustment is limited in a near-end interval near the current step, large-range disturbance to an overall bending path is avoided, meanwhile, parallel records of original parameters and correction parameters are reserved, and the subsequent angle accumulation and correction process has a clear data basis.

Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: determining, for a conversion between a current frame of a video and a bitstream of the video, rate control information for encoding a current block in the current frame, the rate control information being determined at least based on information of a first set of blocks in the current frame that is encoded before the current block; and performing the conversion based on the rate control information.

An encoding system (110) receives a report from a decoding system (120). The report identifies a packet that includes a first video portion of the video stream and includes feedback indicating whether the decoding system (120) successfully receives the first video portion. The encoding system (110) configures the video encoder (115) to encode a second video portion of the video stream based on whether the feedback indicates that the first video portion is successfully received. Correspondingly, a decoding system (120) sends the report and decodes the second video portion according to the encoding.

Certain aspects of this disclosure provide rate control techniques for semantic communication. One method includes: obtaining an indication of a target from a source application; determining one or more channel conditions of a communication channel; determining, based on the target and the one or more channel conditions of the communication channel, a function of first information to be transmitted on the communication channel and the number of resources in a first resource set for transmission on the communication channel; obtaining second information corresponding to source data from the source application; and transmitting the second information on a second resource set satisfying the function of the communication channel via simulated transmission.

The present application relates to a kind of first steel hit rate control method of hot strip mill equipment, the hot strip mill equipment includes N frame that can be supplied with strip and first steel hit rate control system;Its characterized in that, the first steel hit rate control method of the hot strip mill equipment includes the following steps that the first steel hit rate control system executes: with zero value self-learning module receives the first steel big data module sent historical first steel data, obtains zero value self-learning value ΔL i ;Estimate the deformation resistance deviation average value Δki of each frame rolling force;Estimate the thickness deviation Δhi of each frame;The present application is based on the model of strip threading self-adaption, in combination with multiple algorithms, more accurate calculation rolling force, bending force, the deviation correction coefficient of roll gap, collects and comprehensively considers multiple first steel hit deviation, obtains zero value self-learning coefficient;Can obtain more than the set number of three previous frames, improve the hit rate of first steel.

An encoding system (110) receives a report from a decoding system (120). The report identifies a packet comprising a first video portion of a video stream and comprises feedback indicating whether the first video portion was successfully received by the decoding system (120). The encoding system (110) configures a video encoder (115) to encode a second video portion of the video stream based on whether the feedback indicates that the first video portion was successfully received. Correspondingly, the decoding system (120) sends the report and decodes the second video portion in accordance with the encoding.

A control method, a control system, and a non-transient computer-readable storage medium are provided. The control method is applicable to a pumping station comprising one or more pumps. The method may include: comparing an inflow rate of the pumping station with a flow rate for optimal energy consumption of the pumping station; determining, based on whether the inflow rate of the pumping station is greater than or equal to, or less than or equal to, the flow rate for optimal energy consumption of the pumping station, a corresponding constraint that indicates whether a target outflow rate of the pumping station is to be greater than or equal to, or less than or equal to, the flow rate for optimal energy consumption of the pumping station; and setting a target outflow rate that meets the constraint, for constant flow rate control of the pumping station.

The present disclosure provides a rate control method, device, electronic device, storage medium and program product. The method includes: dividing a video sequence into multiple image groups; determining the predicted rate of each image group and the first parameter of each image group; determining the predicted rate of the first predicted frame based on the predicted rate and the number of frames of the multi-frame images included in each image group; for the i-th predicted frame in each image group, performing the following steps: updating the second parameter of the i-th predicted frame based on the second parameter of the i-1-th predicted frame, the predicted rate of all predicted frames in the first i-1 predicted frames, the actual rate of all predicted frames and the number of frames of the multi-frame images included in each image group; determining the predicted rate corresponding to the i-th predicted frame based on the first parameter, the predicted rate of the i-1-th predicted frame and the second parameter of the i-th predicted frame. In this way, variable bit rate rate control can be achieved without significantly increasing resource consumption and delay.

The invention provides an autonomous control method for fixed-point landing of an unpowered return high-speed aircraft. An attitude angle controller, a sinking rate controller, a speed controller and a transverse lateral controller are included. The attitude angle controller comprises a pitch angle control loop, a yaw angle control loop and a roll angle control loop; the pitch angle loop generates a pitch angle rate instruction Qc and outputs the pitch angle rate instruction Qc to the pitch angle rate loop; the pitch angle rate loop generates an elevator command delta e so as to control the pitch angle of the aircraft; the yaw angle loop is multiplied by a gain coefficient # imgabs0 # after passing through a high-pass filter, and then a rudder instruction delta r is generated; the roll angle loop generates a roll angle rate instruction Pc and outputs the roll angle rate instruction Pc to the roll angle rate loop; the roll angle rate loop generates an aileron command delta a to control the roll angle of the aircraft; the sinking rate controller comprises a height control loop and a sinking rate control loop; the height control loop generates a sinking rate instruction # imgabs1 # and outputs the sinking rate instruction # imgabs1 # to the sinking rate control loop; the subsidence rate control loop generates a pitch angle instruction theta c so as to control the subsidence rate; a speed control loop of the speed controller outputs a speed brake instruction # imgabs2 # so as to control the speed; the transverse lateral controller outputs a roll angle command gamma c to correct heading and offset range.