24results about How to "Smooth deceleration" patented technology

The invention relates to a multi-target adaptive cruise control method based on fuzzy model predictive control. The multi-target adaptive cruise control method comprises the following steps: collecting real-time operation data of a vehicle; inputting the real-time operation data of the vehicle into the improved vehicle longitudinal dynamic model, and predicting the future motion state of the vehicle; on the basis of the output of the vehicle longitudinal dynamics model, a feedback correction ACC system vehicle following prediction model is used for predicting and correcting the vehicle following behavior in real time, and a vehicle following control strategy is dynamically adjusted; dynamically adjusting the weight of a target function under model prediction control by adopting a fuzzy variable weight adjustment strategy; and performing model prediction control according to the target function and considering multiple constraint conditions, generating accurate acceleration and deceleration control parameters, acting on the controlled vehicle, and realizing multi-target adaptive cruise control. Compared with the prior art, safe, energy-saving and efficient self-adaptive vehicle following control can be achieved in a complex and changeable traffic environment, and an effective technical scheme is provided for improving the response speed and adaptability of an intelligent cruise control system.

The invention discloses a hydraulic oil cylinder with high buffering performance, and relates to the technical field of hydraulic oil cylinders, the hydraulic oil cylinder comprises a reciprocating motion assembly, and the reciprocating motion assembly is used for driving a piston rod to do reciprocating rectilinear motion. During use, when a sealing piston is about to move to a stroke terminal, a buffer ring generates thrust on an annular plate, so that two nitrile rubber pads are sunken, meanwhile, a reset spring is extruded and contracted, and under the cooperation of the reset spring and the nitrile rubber pads, the sealing piston is preliminarily buffered, and in addition, a connecting rod pushes a buffer plate to move in an arc-shaped cover; the piston rod body is filled with hydraulic oil and gradually extrudes polyurethane foam, the polyurethane foam has good buffering performance, the filled hydraulic oil generates viscous resistance, the extruded hydraulic oil can enter the buffering cavity through the oil inlet cavity, secondary buffering is conducted on the sealing piston under the cooperation of the polyurethane foam and the filled hydraulic oil, the movement speed of the piston rod body is gradually reduced, and the sealing effect is improved. And stable speed reduction and stopping are realized.

The invention discloses a regenerative braking optimization method and system based on energy recovery trend failure judgment. The regenerative braking optimization method comprises the steps that state information of a vehicle in the driving process is obtained through an in-vehicle sensor system and a state estimator; the energy recovery trend failure judgment module establishes an energy recovery trend model according to the received data, judges an energy recovery trend failure state and sends a signal to the control module; if the vehicle does not enter the trend failure state, the vehicle continues a normal regenerative braking control process; if the vehicle enters a trend failure state, under the condition that the braking force of an existing motor is not changed, the braking performance is guaranteed while the recovery efficiency is met by adjusting the braking force distribution coefficient of a front axle and a rear axle of the vehicle, considering the vehicle state and fully utilizing ground attachment conditions; and the execution module executes according to the instruction of the control module. When the braking energy recovery trend is failed, an effective dynamic adjustment mechanism is entered, and the energy recovery efficiency and the braking performance stability are guaranteed.

The present invention relates to the technical field of shaft hoists, and discloses a safety protection device for shaft hoists, including a hoist platform; a protection unit, the protection unit including a bracket installed on the hoist platform, and a column installed on the bracket; a flipping mechanism, the flipping mechanism is arranged on the column and contacts the steel rope of the hoist body, and the flipping mechanism performs a pulling action on the steel rope; a deceleration mechanism, the deceleration mechanism decelerates the steel rope to avoid damage when protecting the steel rope from falling. The present invention utilizes a flipping mechanism and a deceleration mechanism to ensure the safety of the steel rope of the hoist body. When the steel rope has a tendency to fall, the flipping mechanism quickly pulls the steel rope to avoid rapid falling and ensure the safety of the system. At the same time, the deceleration mechanism can steadily reduce the speed, disperse the impact force, and protect the physical structure of the steel rope. The cooperation of the two effectively solves the technical problem that the brake device is damaged due to rope overload and the rope loses restraint and slides.

The application relates to the technical field of battery manufacturing, and provides a battery slurry online purification device with an acoustic streaming capture topology structure. A plurality of groups of acoustic transducers are fixedly arranged on the inner wall of the body structure of a precision slit section along the circumferential direction of the precision slit section. The acoustic transducers are circumferentially distributed on the inner wall of the precision slit section, and each acoustic transducer has opposite first and second end faces. The first end face faces the internal space of the flow channel and is an acoustic radiation surface for radiating acoustic waves into the battery slurry. The second end face is fixedly provided with a composite foam backing layer. Through the cooperation of the equal-diameter flow channel of the precision slit section, the gradient expansion geometry of the flared section, the circumferentially arranged multiple groups of acoustic transducers, and the composite foam backing layer fixed on the back of the transducer, an integrated topology structure with acoustic standing wave excitation capability, flow field speed reduction regulation capability and high-pressure working condition adaptation capability is constructed, and efficient and low-loss online purification of metal foreign matters in the battery slurry is realized.

The invention discloses a multi-split air conditioning system which comprises an outdoor unit, an air conditioning unit and a control unit. The indoor units are connected to the outdoor units through refrigerant piping and are provided with indoor throttling elements in a matched mode; a control device for controlling the outdoor unit and the plurality of indoor units; in the heating process, the control device receives a shutdown or shutdown instruction, evacuation operation is executed, and refrigerants on the indoor unit side move towards the outdoor unit side; the control unit is configured to execute the following control so that the pressure of the air suction side and the pressure of the exhaust side of the compressor can reach a balanced state: when evacuation operation is executed, the indoor throttling element is controlled to be in a valve opening state, and the outdoor throttling element is controlled to be in a set opening degree; and after the evacuation operation is finished, the indoor throttling element is kept in a valve opening state, the outdoor throttling element is kept in a set opening degree, and then the outdoor throttling element is controlled to work in a valve closing state. The multi-split air conditioning system is ensured to stably operate in the shutdown or shutdown process, and noise is remarkably restrained.

The embodiment of the invention provides a testing method and device, electronic equipment, testing equipment, a testing system, a storage medium and a program product, in the method, the testing equipment is connected with the electronic equipment, an ultrasonic motor is arranged in the electronic equipment, and the testing equipment is used for testing a first displacement according to configured preset duration and first displacement; determining a plurality of test moments and a plurality of reference displacements corresponding to the plurality of test moments of the ultrasonic motor; determining a plurality of test parameters corresponding to the plurality of test moments according to the plurality of reference displacements, sending the plurality of test parameters to the electronic equipment, and receiving a plurality of operation data corresponding to the plurality of test moments sent by the electronic equipment; according to the plurality of test parameters and the plurality of operation data, determining a second displacement and a phase difference adjustment curve of the ultrasonic motor within a preset duration; and determining a test result of the phase difference adjustment curve according to the first displacement, the second displacement and a preset threshold value. According to the method, accurate positioning of the ultrasonic motor is rapidly and efficiently realized based on the phase difference adjustment curve.

The utility model relates to a tackle speed reducer which comprises a fixing frame, a rotating frame arranged above the fixing frame and provided with one end hinged to the fixing frame, and a plurality of rubber sheets evenly arranged on the two sides of the top of the rotating frame in the advancing direction of a tackle, and a rotating cam is rotationally assembled at the end, away from the hinged position of the fixing frame and the rotating frame, of the fixing frame. The rotating cam is located below the rotating frame, and the rotating cam can abut against the bottom face of the rotating frame and drive the rotating frame to rotate upwards in the upward rotating process, so that the tackle moves from low to high on the rotating frame. A plurality of grooves in one-to-one correspondence with the rubber sheets are formed in the top of the rotating frame, compression springs stretching out and drawing back in the direction perpendicular to the length extension direction of the rotating frame are arranged between the bottom faces of the grooves and the bottom faces of the corresponding rubber sheets, and the compression springs are used for jacking the rubber sheets upwards so that the rubber sheets can make friction contact with the tackle. The technical problems that a pulley is slow in speed reduction and long in braking distance are solved.

This disclosure provides a control system, a control device, a control method, and a non-transitory storage medium. The control method is used in a powertrain system including a clutch position sensor, a processor, and a manual transmission, comprising: shifting a gear selected by the shift lever of the manual transmission to a controlled shift gear of an automatic transmission; sending specific information capable of identifying the shifted controlled shift gear to a control device configured to coordinate with the powertrain system to control the movement of a vehicle; and when the clutch position sensor, configured to detect clutch operation, detects the clutch operation, retaining the specific information capable of identifying the controlled shift gear at the start of the clutch operation as the specific information to be sent to the control device.

The invention relates to the field of image data processing, in particular to a method and system for recognizing and monitoring abnormal operation of an escalator, and the method comprises the steps: carrying out the escalator movement mode matching analysis on the movement feature data of parts in the escalator, determining the mechanical loss change trend of the parts, and predicting the load and movement deviation associated information of the escalator; bearing measured data and a load state image of the escalator are jointly analyzed to obtain actual motion offset state information, and load dynamic image recognition is performed on the escalator to obtain actual dynamic characteristics of a load on the escalator, so that external action information of the escalator is determined, and whether an abnormal operation event occurs to the escalator or not is judged; and the escalator braking parameter information and the posture feature information of the load on the escalator are visually recognized, so that the escalator is adjusted to be switched to the motion state of the braking mode. According to the method, the abnormal running condition of the escalator can be accurately predicted through image recognition, smooth running transition switching is conducted on the escalator in time, and the running safety of the escalator is improved.

The invention discloses a laser ranging mechanism with high measurement precision, which comprises a fixed seat, an adjusting mechanism is arranged on the fixed seat, a transmission rod is rotated in the fixed seat, an axial mechanism is mounted on the fixed seat, a pitching groove is formed in a rotating seat, a pitching block is slidably connected in the pitching groove, and the pitching block is slidably connected in the pitching groove. According to the adjusting mechanism, the pitching angle is adjusted through cooperation of a rotating base and a pitching block, the adjusting flexibility is guaranteed through the design of a multi-direction base and a follow-up ball, switching of coarse adjustment and fine adjustment is achieved through cooperation of a thick screw rod and a thin screw rod, the adjusting precision and efficiency are greatly improved, meanwhile, the stability of the adjusting process is improved through arrangement of a side spring, and the service life of the adjusting mechanism is prolonged. In addition, the design of the synchronous ring and the synchronous sleeve ensures the synchronism in the coarse adjustment and fine adjustment processes, errors in the adjustment process are avoided, the arrangement of the display screen and the scales enables the adjustment process to be more visual and accurate, an operator can quickly find the optimal measurement angle, and the measurement accuracy is improved. And the measurement precision and the use convenience of the laser range finder are improved.

This utility model relates to the technical field of pneumatic baffle devices, and discloses a pneumatic baffle device for a feed roller conveyor. It includes a main frame, an integrated baffle, casters, a slide rail, and a cylinder. The slide rail and cylinder are both housed within the device body. The main frame is slidably connected to the slide rail, the integrated baffle is located on the side wall of the main frame, the casters are located on the top surface of the main frame, and the bottom surface of the main frame is connected to the cylinder's pushing end. This utility model reduces edge collision deformation of the sheet metal through a dual design of elastic elements and a buffer layer, extending the baffle's service life. The adsorption integrated plate utilizes vacuum negative pressure to achieve smooth deceleration and fixation of the sheet metal, avoiding bouncing or slippage during high-speed conveying. The integrated design of the integrated baffle and the adsorption integrated plate saves installation space and adapts to the conveying needs of sheet metal of different specifications.

The utility model provides a friction-adjustable speed reducer and a production line, relates to the technical field of speed reducers, and solves the technical problems that parts are easy to fall off and the production efficiency is influenced due to the fact that the speed is reduced by an impact stopper on the production line. The speed reducer comprises a mounting plate which is fixed on a production line and is used for bearing all parts of the speed reducer; the number of the fixing shafts is two, and the fixing shafts are oppositely arranged on the mounting plate; the number of the rotating wheels is two, and the rotating wheels are rotatably arranged on the fixed shaft respectively; the speed reducing part is arranged on the rotating wheel in a sleeving mode and can apply friction speed reducing force to workpieces conveyed on the production line; and the adjusting assembly is installed on the fixed shaft and makes contact with the rotating wheel so as to adjust the friction deceleration force applied to the workpiece by the deceleration part. According to the utility model, automatic and stable speed reduction of a workpiece before a station is installed is realized, so that the workpiece can be stably transited to a next station, the problems of loosening and falling of parts are solved, and the production efficiency is improved by more than 30%.

The present application provides a high-voltage aluminum bar straightening device for new energy vehicles, which relates to the technical field of metal aluminum bar straightening, including a straightening machine, a fixed frame is arranged at one end away from the feeding platform, the top end of the fixed frame is fixedly connected to a first clamping platform, the first clamping platform is rotatably connected to a first clamping roller, the fixed frame is slidably connected to a second clamping platform, the second clamping platform is rotatably connected to a second clamping roller; a sliding frame is arranged on the straightening machine, the top end of the sliding frame is fixedly connected to a third clamping platform, the third clamping platform is rotatably connected to a third clamping roller, the sliding frame is slidably connected to a fourth clamping platform, the fourth clamping platform is rotatably connected to a fourth clamping roller. The present application can reduce the probability of the aluminum bar bending again due to its length after straightening.

This application discloses a method, apparatus, system, and storage medium for planning the motion trajectory of a robotic arm, relating to the field of mechanical control technology. The method includes acquiring an initial path point, an end path point, and intermediate path points; calculating the absolute distance from each path point to the initial path point and the total absolute distance; setting a preset spatial velocity; calculating the total travel time and the time to reach each path point; setting a preset speed change time; calculating the required speed change time for each path point; calculating the angle vector of the axis motor in the corresponding joint space and the velocity and acceleration of the axis motor in the uniform and variable speed segments of each path segment; setting a preset sampling time; calculating the real-time values ​​of the joint acceleration vector, velocity vector, and position vector of the robotic arm at each time point; and planning the motion trajectory of the robotic arm. The embodiments of this application improve the accuracy and efficiency of robotic arm movement, reduce vibration and impact, and improve the stability and safety of movement.

The invention belongs to the technical field of additive manufacturing equipment, and particularly discloses double-spring laminate buffering type weightlessness simulation 3D printing equipment and method.The double-spring laminate buffering type weightlessness simulation 3D printing equipment comprises a sliding rail base, double sliding rails, a single sliding rail, a base plate base, a laser powder feeding system, a motor and a double-spring laminate, and the double sliding rails and the single sliding rail are vertically fixed to the sliding rail base; the two sides of the base plate base are installed on two sliding rails of the double sliding rails through sliding blocks respectively, and a forming base plate is fixed to the base plate base. The laser powder feeding system is installed on the single sliding rail through a sliding block. The motor is used for driving the slider to move; the double-spring layer plate is installed on the sliding rail base, and the double sliding rails penetrate through the double-spring layer plate. The double-spring layer plate comprises an upper spring layer, a clamping plate and a lower spring layer which are sequentially and fixedly connected from top to bottom. The weightlessness 3D printing is realized through the forming platform and the free falling body of laser, and the weightlessness 3D printing process can be continuously and stably simulated by returning to the initial position through the motor after buffering and rebounding of the double-layer spring plate.

The invention relates to the technical field of automation control, and discloses an air trolley full-closed-loop position control method and system, and the method comprises the following steps: S1, calling target position data through a control system; s2, measuring the current position of the trolley by using distance detection equipment; s3, comparing the target position with the current position of the aerial trolley; s4, according to the distance difference between the real-time position and the target position, in combination with a closed-loop control algorithm, outputting movement speed and direction signals; s5, when the distance from the target position is far, the control system outputs an acceleration signal, and when the distance from the target position is close, the control system outputs a deceleration signal; and S6, data abnormity alarm is carried out. The speed of the trolley is adjusted through the dynamic distance difference between the real-time position feedback and the target position, the positioning precision can be remarkably improved, the control system adjusts power output based on the distance error, it is ensured that the trolley decelerates stably when approaching the target position, the overshoot phenomenon is avoided, and finally high-precision and rapid positioning control is achieved.

The check valve comprises a valve body, the side wall of the valve body is an outlet, the bottom of the valve body is an inlet, the top of the valve body is fixedly connected with a valve deck through a bolt, the valve deck is in threaded connection with a valve rod, the top of the valve rod is fixedly connected with a rotary disc, and the rotary disc is fixedly connected with a damping check valve element. The bottom of the valve rod is fixedly connected with a valve element, the valve element corresponds to an inner valve port of the valve body, and a buffering device is arranged at the bottom of the valve element. According to the check valve with the damping check valve element, a buffering device is arranged at the bottom of the valve element, impact and vibration generated when the valve element is closed are effectively reduced, and therefore the service life of the valve is prolonged; and stable speed reduction can be achieved when the valve element is closed, impact and vibration are further reduced, a damping block is arranged to absorb energy, and the overall damping effect is improved.

This invention provides a parallel split learning method, apparatus, and system based on adaptive gradient correction, relating to the field of distributed machine learning computing technology. The invention receives intermediate layer gradients uploaded by each client, divides them into deep and shallow gradient components, calculates the consistency and comprehensive ranking score of each client's gradient, and generates an ordered gradient queue. Then, gradients are introduced one by one for weighted aggregation, directional stability judgment, and noise truncation to update the aggregation center. The comprehensive ranking score of high-confidence gradients is selected from the ordered gradient queue, and the global confidence score is calculated to dynamically adjust the global model parameters. A global reference direction is output and sent to each client, enabling each client to correct its gradients according to the global reference direction. The residual after gradient correction is used as a regularization constraint for the next round of local training optimization. This invention effectively suppresses gradient conflicts, improves model convergence speed and robustness, and reduces server computational overhead.

The utility model relates to a vibratory hammer rotating hanging bracket with a brake structure, which relates to the technical field of piling equipment production and comprises a driven gear, and a buffer brake component for buffering and braking the driven gear and an emergency brake component for directly braking the driven gear are respectively arranged on the side edge of the driven gear. The buffer brake assembly and the emergency brake assembly are separately engaged with the driven gear, and when the buffer brake device is used, the buffer brake assembly used for conducting buffer brake on the driven gear and the emergency brake assembly used for conducting direct brake on the driven gear are adopted, so that the mode of braking the driven gear can be selected according to needs; the emergency braking assembly is selected during emergency braking, the buffering braking assembly is selected for braking during non-emergency braking, the speed of the driven gear can be gradually reduced until the driven gear is successfully braked, abrasion of the middle rotating shaft of the driven gear can be reduced, and therefore the service life of the middle rotating shaft is guaranteed.

The invention discloses a weight and liquid level detection device for lead-acid battery production, and the device comprises a roller conveying line which is used for conveying lead-acid batteries; a lifting mechanism; the pressure sensor is arranged between the first lifting cylinder and the connecting plate and is used for detecting the weight of the lead-acid battery; a liquid level detection assembly; the device detects the weight and the liquid level at the same time, the detection time can be saved, the lead-acid battery is in a static state during liquid level detection, and the detection result is more accurate; the weight and liquid level detection devices are integrated, so that the occupied space is smaller, and the plant space can be saved.

The engineering truck caliper type brake comprises an installation block and shells, the shells are symmetrically and fixedly connected to the surface of the installation block, a sliding rod is slidably connected to the inner wall of the installation block, and one end of the sliding rod penetrates through the surface of the installation block and is fixedly connected with a first limiting block; a second limiting block is embedded in the surface of the first limiting block, air bags are symmetrically and fixedly connected to the surface of the mounting block, and air pipes are connected to the surfaces of the air bags. According to the engineering truck caliper type brake, the air cylinder, the gear and the first rack are arranged, the air cylinder drives second limiting blocks on the two sides to move firstly through a sliding rod and the first gear at the same time to decelerate a moving part, the limiting effect can be improved, the moving part can be decelerated more stably, meanwhile, the second limiting blocks can be rotated, and the moving part can be prevented from being damaged. And the second limiting block can be taken down from the surface of the first limiting block, the second limiting block is replaced, the service life of the brake can be prolonged, and the practicability of the brake is improved.

The utility model discloses an axle-mounted high-speed rail brake disc which comprises a connecting frame and an axle, one end of the axle is fixedly connected with a wheel, the outer surface of the axle is connected with a brake disc in a sliding mode, the inner surface of the brake disc is fixedly connected with a circulating pipe, the brake disc is movably connected with the wheel, and the outer surface of the axle is connected with a bearing plate in a sliding mode. A propelling device is fixedly connected to the rear surface of the bearing plate, the other end of the propelling device is fixedly connected to the rear surface of the brake disc, a water tank is fixedly connected to the front surface of the bearing plate, and a water pump is fixedly connected to the front surface of the water tank. This helps to reduce the temperature of the brake disc, improve braking performance and prolong the service life of the brake disc.

The present invention discloses an offshore wind and wave combined power generation machine, and relates to the technical field of offshore combined power generation. The present invention provides an offshore wind and wave combined power generation machine, comprising a mounting frame, a column fixedly connected to the top of the mounting frame, a mounting shell fixedly connected to the top of the column, a blade shaft rotatably connected to the mounting shell, a vertical rod fixedly connected inside the mounting frame, a sea wave generator slidably connected to the vertical rod, and a deceleration slider slidably connected to the vertical rod. When the wind acts on the blade shaft, the blade shaft rotates to generate electricity, and when the waves act on the sea wave generator, the sea wave generator will slide up and down with the waves to generate electricity. When encountering extreme sea conditions, the wave fluctuation amplitude increases, causing the sea wave generator to squeeze the deceleration slider to slide up and down. The deceleration slider can slow down the upward amplitude of the sea wave generator, avoiding equipment damage caused by overload operation of the sea wave generator or affecting the power generation efficiency and power generation stability.