104 results about "Forward speed" patented technology

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

The invention discloses a speed measurement method of an optimized speed observer, relates to the technical field of vehicle power control, and solves the problem that a small negative value is easily taken as a large positive value or a small positive value is easily taken as a large negative value due to the fact that a deviation angle crosses a period in angle error calculation of an existing speed observer. The speed measurement method comprises the following steps: the acquisition and processing module acquires and processes a pulse signal of the encoder to obtain a feedback angle; an angle estimation value is calculated; taking the difference between the feedback angle and the angle estimation value as a deviation angle, and performing nonlinear compensation to obtain an angle deviation value; inputting a matrix operation framework of a speed observer, and outputting a linear acceleration estimated value; the pulse signal of the encoder is collected and processed again, a feedback angle is obtained, M-method operation and filtering processing are carried out on the feedback angle and the last feedback angle, and the feed-forward speed is obtained; and the speed observer performs weighted fusion operation on the linear acceleration estimated value, the angle deviation value and the feedback angle to obtain a final angular velocity estimated value, so that a final estimated angle is obtained, and velocity measurement is completed.

A slipform paver includes a slipform mold having a mold width extending transverse to a paving direction. At least one leveling beam is supported behind the slipform mould for engaging an upper surface of the formed unhardened concrete structure to level the upper surface, the at least one leveling beam being configured to oscillate transversely to the paving direction. At least one forward speed sensor is configured to provide a forward speed signal corresponding to a forward speed of the slipform paver in the paving direction. The controller is configured to receive the forward speed signal and generate a command signal to control the lateral oscillation frequencies of the at least one leveling beam such that a constant relationship is maintained between the forward speed lateral oscillation frequencies.

In the descending process of the aircraft, the flight control system seeks and keeps a glide gradient, and the glide gradient is determined according to the parameters input by a single pilot; for example, the position of a control shaft of a flight joystick. During landing approach, a pilot visually observes a predetermined landing site, so that the pilot can easily determine an appropriate guide slope selection. The glide slope defines a ratio of forward and descent speeds that is automatically established and maintained / updated as a function of pilot input, while these speeds are automatically lowered during descent, although the two speed directions are each affected by significantly different aircraft mechanisms controlling them. The aircraft ends its glide path when the speed is zero or near zero so as to be able to land by short-distance vertical descent. Thus, the pilot gets rid of both the problems of coordinating the speed to reach a specific guide gradient and reducing the speed while maintaining such coordination.

The invention discloses a pepper harvester advancing speed two-stage regulation and control method based on a multi-source prediction model, and mainly relates to the field of pepper harvesters. The method comprises the steps that a high-speed camera and a torque sensor collect image information and a torque signal, the image information and the torque signal are preprocessed and then input into a machine vision model and a torque prediction model to obtain a predicted torque value corrected by an image processing technology, and after the predicted roller load condition is obtained through a mechanical model, the forward speed is preliminarily adjusted to enable the load to be in a normal value interval; load data on an upper conveyor belt and a lower conveyor belt of a separation device are collected, after the impurity rate is calculated, the impurity rate is input into a CNN-LSTM neural network model constructed by fusion time and space features improved by an ant colony algorithm to obtain the harvesting impurity rate condition, and after the advancing speed is further adjusted according to the predicted impurity rate, the load condition is monitored in real time. The speed regulation of the load condition in the two-stage speed regulation is prior to the speed regulation of the impurity rate condition. According to the invention, the forward speed of the harvester can be adjusted in real time according to the conditions of the roller load and the harvesting impurity rate.

The invention discloses a self-balancing bicycle software control method and system capable of achieving zero sample migration. The method comprises the steps that bicycle body posture information of a self-balancing bicycle and a motion instruction from the outside are obtained in real time; the trained self-balancing neural controller receives vehicle body attitude information, a motion instruction, a current steering motor position fed back by a control layer and a vehicle body linear speed, forward reasoning calculation is carried out once, and a neural network directly outputs two control variables including a target steering angle instruction and a driving accelerator instruction; generating a steering control signal based on the target steering angle instruction according to a servo motor communication protocol, wherein the steering control signal is used for driving a steering servo motor to accurately rotate to a target angle; based on the accelerator driving instruction, the accelerator driving instruction is converted into an accelerator control command for the hub brushless motor, and the accelerator control command adjusts the forward speed of the vehicle. The technical problems of simulation-reality gaps, poor robustness and low development efficiency of existing self-balancing bicycle control are solved.

A method for controlling an aircraft with a rotary wing provided with a power plant comprising a plurality of engines, the aircraft comprising a human-machine interface controlling a control member capable of acting on a longitudinal acceleration of the aircraft. During the economy operating mode during which one of the engines does not supply power, the method comprises measuring a forward speed of the aircraft, and adjusting an authority of the human-machine interface over the longitudinal acceleration with a flight control computer as a function of the forward speed.

This invention relates to a fishtail-type propeller propeller, comprising a base for fixing to a hull, a rotating shaft vertically supported on the base and rotatable relative to the base, and a vertically mounted propeller plate. A laterally extending connecting rod is fixed to the rotating shaft. The invention is characterized by: a limiting seat fixed to the connecting rod, the limiting seat having a vertically extending shaft hole in which a pin is installed; the propeller plate being fixed to the pin and located below the limiting seat; a limiting member also being provided on the pin; and an arc-shaped movable space centered on the pin and a limiting part inserted into the arc-shaped movable space between the limiting member and the limiting seat. The propeller plate rotates relative to the limiting seat within the range defined by the arc-shaped movable space via the pin. This invention allows the propulsion of the hull to come from the combined force of the flexible connection between the water flow and the propeller plate and the rigid connection between the rotating shaft and the propeller plate, which, under the same conditions, helps to increase the forward speed of the hull and is easy to operate.

To improve the durability of an electric braking device.SOLUTION: A suction control unit (10) of an electric braking device (1) executes a control for decreasing the forward-movement speed of a piston (P) as a target pressure value increases, in which the control is executed at least for a period after a hydraulic pressure on a hydraulic chamber side with respect to a switching valve (NC1) increases to the proximity of the target pressure value, in a period in which a forward-movement control is executed.SELECTED DRAWING: Figure 1

Embodiments of the present application provide a method and device for correcting an IMU installation angle of a vehicle, an electronic device, a storage medium and a program product. The method comprises: obtaining a first speed collected by a front wheel speedometer on the vehicle, then obtaining a latest front wheel rotation angle, and decomposing the first speed based on the front wheel rotation angle to obtain a second speed. The second speed comprises a forward speed and a lateral speed of the vehicle. At the same time, a vehicle speed of the vehicle at a previous time is obtained by fusing the obtained multi-sensor data, and then the IMU installation angle at the current time is corrected according to the second speed and the obtained vehicle speed of the vehicle at the previous time to obtain a corrected IMU installation angle at the current time. The corrected IMU installation angle comprises an IMU pitch installation angle, an IMU roll installation angle and an IMU heading installation angle. The method can correct the three different installation angles in the IMU installation angle.

The present invention provides a thirteen-speed planetary gear transmission. The transmission comprises four planetary gear rows arranged sequentially from the input shaft to the output shaft. A clutch in the torque transfer device connects the input shaft and the planetary gear train, while a brake in the torque transfer device connects the transmission housing and the planetary gear train. Two combinations of each clutch and brake selectively engage to establish thirteen forward speed ratios and one reverse speed ratio between the input and output shafts. The transmission utilizes a single planetary gear planetary gear row transmission. The four planetary gear rows are simple, compact, and compact, utilizing a common Simpson coupling mechanism with other planetary gear rows, resulting in a mature manufacturing process. Seven torque transfer components (clutches or brakes) are employed, reducing the transmission's control difficulty and size. Controlling each gear position requires only two torque transfer components, and shifting between adjacent gear positions requires only the engagement and disengagement of a pair of torque transfer components, simplifying control.

The invention provides a water depth detection and control method for adaptively adjusting mowing depth according to underwater topography. The method comprises the following steps: S1, setting an operation route of an unmanned mowing ship in a water surface to-be-operated area; s2, a plurality of point locations are arranged on the operation route in the step S1, data of each point location are recorded, and the data of the point locations comprise coordinates and water depth values of the point locations; s3, at a first point position of the operation path, a cutting knife of the unmanned mowing ship is controlled to descend to a preset initial harvesting depth, and meanwhile, the descending height of the cutting knife is recorded; s4, starting the harvesting device to start aquatic plant harvesting operation, continuously adjusting the height of the cutting knife in the process that the unmanned grass cutting ship advances to the next point position according to the preset path of the operation route, and controlling the advancing speed v of the unmanned grass cutting ship from the point position Pn to the next point position Pn + 1, so that the height adjustment of h can be realized when the cutting knife reaches the next point position Pn + 1, and the descending height of the cutting knife at the next point position is recorded, so that the harvesting depth is adaptively adjusted according to the water depth.

The utility model provides a novel mini-tiller which comprises a connecting shaft, a machine head part, a front wheel, a connecting plate, a connecting column, a gearbox, a transmission mechanism and a rear wheel. The mini-tiller is provided with the front wheel and the rear wheel, so that the working quality of the mini-tiller on hard soil or soft soil which is easy to sink is ensured; meanwhile, due to the installation of the rear wheels, the advancing speed of the front mini-tiller can be stabilized by pushing or pulling force in the using process of the mini-tiller, at the moment, the advancing speed does not need to be controlled manually, the physical strength of operators is saved to a great extent, and the comfort of the operators is improved.

The invention relates to a method for estimating the load of a motor vehicle in a low-speed manoeuvring situation, the method comprising a repetition of the steps: a – acquiring a current mode relating to the transmission lever; b – acquiring information of a current direction of movement of the vehicle, which can adopt three values: forward, backward and undetermined; c - acquiring information on a current forward speed of the vehicle; d - calculating a load ratio as a function of a torque delivered by the power train to the wheels and an observed acceleration, this ratio being representative of the current load of the vehicle, the load being influenced in particular by the local gradient of the roadway, rising or falling, the step of calculating the load ratio being suspended in the case where the information on the direction of movement is undetermined or in the case where the information on the direction of movement is opposite to the current mode.

A VTOL-type air vehicle is transitioned from forward speed mode to hover mode via a transient path in transition mode. The air vehicle includes first and second propulsion systems, and high lift, mild stall fixed wings. The first propulsion system can provide a first thrust (sufficient for enabling powered aerodynamic flight) at a first thrust vector. The second propulsion system can provide a second thrust (sufficient for enabling vectored thrust flight) at a second thrust vector, which is spatially fixed with respect to the air vehicle at least during transitioning. The transient path includes, during transitioning, manipulating a first magnitude of angle of attack and a second magnitude of forward speed to provide a corresponding aerodynamic lift component, and concurrently manipulating a third magnitude of the second thrust to provide a vertical vectored thrust component corresponding to the first magnitude of angle of attack. A summation of the aerodynamic lift component and vertical vectored thrust component is sufficient for enabling the air vehicle to remain in controlled flight in transition mode.

The application discloses a dead reckoning method and device and electronic equipment, comprising: constructing a current state quantity corresponding to a filter according to forward speed information of a target vehicle at a current time, and predicting the current state quantity to obtain a state quantity prediction result of the filter; obtaining a residual error between a current observed vehicle speed value corresponding to the target vehicle and the state quantity prediction result, determining a residual error replacement quantity matched with the residual error, and updating the state quantity prediction result of the filter according to the residual error replacement quantity; and determining a dead reckoning result corresponding to the target vehicle according to the updated state quantity prediction result and steering information of the target vehicle. The technical scheme of the embodiment of the application can improve the reliability of the dead reckoning result.

The utility model relates to the field of mini-tillers, and discloses a gear transmission assembly for a mini-tiller, which comprises an input shaft, an intermediate shaft and an output shaft, and a driving duplicate gear capable of moving along the axial direction is arranged on the input shaft; a first transmission gear, a second transmission gear, a third transmission gear and a first speed regulation duplicate gear are arranged on the intermediate shaft; a driven gear and a second speed regulation duplicate gear are arranged on the output shaft; the driving duplicate gear can be meshed with the first transmission gear, the second transmission gear, the first speed regulation large gear and the second speed regulation large gear are meshed, the first speed regulation small gear is constantly meshed with the second speed regulation large gear, the second speed regulation small gear is constantly meshed with the second transmission gear, and the third transmission gear is constantly meshed with the driven gear. By improving the gear set, the mini-tiller can achieve three forward gears and one reverse gear, and the problems that in the prior art, a mini-tiller is only provided with one forward gear and one neutral gear, the forward speed is fixed, and efficiency improvement of cultivation work is not facilitated are solved.

A motorized module (4) for transporting products has a loading platform (6), at least a first axle (11) and at least a second axle (8, 9, 10), each provided with at least one respective rolling body (12) on the ground, a respective mechanical speed reducer (11R) (8R, 9R, 10R), a respective releasable angular connection coupling (11G), (8G, 9G, 10G) interposed between a respective hydraulic motor (11A), (8A, 9A, 10A) for driving the axle and the respective rolling body (12), and an electronic unit (20) for controlling the hydraulic motors (11A), (8A, 9A, 10A) and the angular connection couplings (11G), (8G, 9G, 10G) as a function of the forward speed of the module (4) and which are activated successively when the forward speed of the module (4) varies.

Adaptive speed control is specified for a work vehicle, e.g., a work vehicle without a global satellite navigation system or equivalent positioning components. Operating parameters of the work vehicle, corresponding to at least its orientation and forward speed, are monitored, as is the steering angle. At least while a speed control operating mode is activated, and the detected steering angle corresponds to forward travel of the work vehicle, a forward speed for the work vehicle is commanded to a first speed setting.If it is determined that the detected steering angle exceeds a specified sensitivity value, the feed rate for the work vehicle is ordered to a second speed setting, with at least one maximum value for the second speed setting being automatically determined based on at least one or more operating values ​​of the work vehicle corresponding to the orientation of the work vehicle.

The present invention comprises a base ring portion; a crank arm portion fixed to the front of the base ring portion; a chain ring portion fixed to the rear surface of the base ring portion; and a pedal portion connected to the other end of the crank arm portion to apply force to the crank arm portion, wherein the crank arm portion comprises: a crank arm; a first coupling portion located at one end of the crank arm and fixed to a certain area of ​​the base ring portion; and a second coupling portion located at the other end of the crank arm and to which the pedal portion is coupled, wherein the base ring portion comprises: a circular base ring; a first-1 straight support member extending from the inner circumference of a first area of ​​the base ring to the inner circumference of a second area of ​​the base ring; a first-2 straight support member arranged to intersect the first-1 straight support member and extending from the inner circumference of a third area of ​​the base ring to the inner circumference of a fourth area of ​​the base ring; and a crank arm first fixing portion located in the area where the first-1 straight support member and the first-2 straight support member intersect, to which one end of the crank arm is fixed. The invention relates to a bicycle crank set comprising a second crank arm fixing part disposed in a certain area of ​​the circular base ring, wherein the center area of ​​the crank arm is fixed, and wherein, when rotating the chain ring, the forward speed of the bicycle can be varied while the force applied by the user to the pedal remains the same.

Method for regulating the operation of a cleaning equipment on a self-propelled road cleaning vehicle. The invention relates to a method for regulating the operation of a cleaning equipment fitted to a self-propelled road cleaning vehicle, as a function of the forward speed Va of said vehicle, said comprising a rotating circular brush, means for vacuuming dust and / or waste, and means for spraying said brush with water, said equipment being capable of moving from an inactive position, raised relative to the ground, to an active working position in which it is lowered, said brush in contact with the ground, and vice versa.In this process, the positioning of the equipment and the rotation of the brush are managed according to a correlation with the vehicle speed Va, based on at least one speed threshold chosen from at least Vamin (minimum forward speed) and Vamax (maximum forward speed) previously defined. Figure for the abbreviation: Fig. 1.

Embodiments of the present application provide a sowing control method and device, a control device and a readable storage medium, and relate to the technical field of unmanned aerial vehicles. The method is applied to an unmanned aerial vehicle provided with a sowing mechanism, the sowing mechanism comprising a flail plate and a swing driving assembly, the swing driving assembly being connected with the flail plate, the swing driving assembly being used to drive the flail plate to swing back and forth on the left and right sides in the vertical direction, and the flail plate being used to sowing materials outward in the swing process. The method comprises the following steps: obtaining environmental wind information; determining whether the environmental wind will cause the sowing width of the sowing mechanism to be asymmetric according to the environmental wind information; and when yes, adjusting the forward speed and the return speed of the flail plate according to the environmental wind information to restore the symmetry of the sowing width. In this way, the influence of the environmental wind can be offset, the symmetry of the sowing width can be restored, and the missed sowing or the repeated sowing caused by the asymmetric sowing width can be reduced.

Systems and methods for controlling the motion, flight, and stability of vertical takeoff and landing (VTOL) aircraft are disclosed. These systems employ four or more stabilators with airfoil cross-sections to redirect airflow from rotor blades, allowing independent adjustment for hover, roll, yaw, pitch, and forward or reverse movement. In one configuration, the VTOL aircraft transitions between helicopter and fixed-wing modes during flight, with stabilators augmenting lift in fixed-wing mode. Additional yaw control surfaces redirect thrust from engines to enhance maneuverability. The design enables low-cost, easily maintained VTOL aircraft capable of achieving forward speeds greater than those of traditional helicopters.

The application is suitable for the technical field of metal processing, and particularly relates to a metal coil processing method, device, equipment and medium. The method comprises the following steps: determining whether the parking time length of a production line is greater than a preset time threshold value, and if yes, adjusting the forward speed value of a workpiece to a preset parking speed; storing the part of the workpiece passing through a first processing unit in the parking time length by a loop, and recording the range of the over-processed part and the over-processing time; and opening a normally closed second processing unit at a preset processing intensity during the time period when the over-processed part passes through the second processing unit. The application can homogenize the over-processing problem, and solve the coil accumulation problem in some sections caused by the difference in the forward speed of the workpiece in different parts of the production line by using the loop storage mode. On this basis, the second processing unit is introduced to eliminate defects in the over-processed part, which can eliminate defects to the greatest extent, ensure the processing quality of the material, and reduce waste.

An eight and sixteen forward gear planetary gear mechanism automatic transmission series, where it includes eight forward speeds realized by combining three simple planetary gear sets, five clutches, plus improved and adapted sixteen forward speeds realized by combining four simple planetary gear sets, six clutches. In this solution, a major type of synchronizer clutch being used corresponding to each planetary gear set. The gear train also uses ratchet and pawl pair clutch structure as an alternative option, so that the automatic transmission has a more compact overall structure, the gearshift efficiency is high, the synchronous responsiveness and stability are excellent. The transmission series has wide and uniform transmission gear ratios, making-capacity maximum to achieve 26:1; and the shift unit is simple and reliable, which can significantly enhance the maneuverability of the vehicle driving and reduce fuel consumption and greenhouse gas emissions.

An AGV positioning method based on improved unscented Kalman filtering includes the following steps: Step 1: First, the forward speed v of the AGV is detected using a motor incremental encoder and an angle encoder. k and steering speed ω k Step 2: Then, receive the information scanned by the LiDAR and generate the reflector coordinate sequence; Step 3: Establish an AGV kinematic model to estimate the AGV pose; Step 4: Transform the reflector coordinates scanned by the LiDAR to the world coordinate system and generate the AGV observation equation; Step 5: Perform an improved unscented Kalman filter based on the state-space equation to obtain the AGV vehicle pose after filtering. This invention, based on the proposed improved unscented Kalman filter algorithm, utilizes the reflector coordinate information to locate the vehicle's position; it boasts fast computation speed, effectively reduces hardware and labor costs, and better overcomes the impact of vehicle position shifts during driving, enhancing subsequent vehicle control.

The present invention relates to a method (900) for protecting a rotorcraft from entering a vortex ring state. The method (900) comprises: monitoring (902) a vertical speed and a forward speed of a rotorcraft; determining (908) a need to perform vortex ring state (VRS) avoidance according to at least one of the vertical speed and the forward airspeed of the rotorcraft; and providing (912, 914), in response to determining the need to perform VRS avoidance, a cue to a pilot of the rotorcraft, wherein providing the cue comprises indicating to the pilot to control one or more flight parameters of the rotorcraft. Also disclosed are a device configured to carry out the method (900) and a rotorcraft comprising a flight control computer configured to carry out the method (900).

A hydraulic control system for a transmission having an input member and an output member (102) operable in at least one forward speed ratio between the output member (104) and the input member (102) and in at least one reverse speed ratio between the output member (104) and the input member (102), comprising: a standard hydraulic control system (260) comprising: a first valve assembly (262) having a first control valve (268) controlled by a first solenoid (266), and a second valve assembly (264) having a second control valve (272) controlled by a second magnet (270), wherein the hydraulic default control system (260) is configured to shift the transmission into a first default speed ratio when the transmission is operating in a first of the at least one forward speed ratio and experiencing a default condition, and to shift the transmission into a second default speed ratio when the transmission is operating in a reverse speed ratio and experiencing the default condition, wherein the first control valve (268) comprises a first spool valve (278) and the second control valve comprises a second spool valve (272) configured to stroke faster than the first spool valve (278).

The invention discloses a flight power distribution method and system for an unmanned aerial vehicle with overhigh forward speed, and the method comprises the steps: judging whether the current forward flight speed of the unmanned aerial vehicle is greater than a set threshold value or not if the unmanned aerial vehicle receives an instruction of a next flight target point; if the current forward flight speed of the unmanned aerial vehicle is greater than a set threshold value, keeping the forward speed unchanged, and adjusting the flight states on the Y axis and the Z axis by calling the own flight power; the unmanned aerial vehicle performs accelerated motion, uniform-speed motion and decelerated motion in sequence on the Y axis; and the unmanned aerial vehicle performs accelerated motion and decelerated motion on the Z axis. When the forward movement speed of the unmanned aerial vehicle is too high, on the premise that the forward speed is not changed, the flight states on the Y axis and the Z axis are adjusted by calling the flight power of the unmanned aerial vehicle, so that optimization of the flight performance is achieved, and the optimization is beneficial to reducing energy consumption and abrasion and improving the cruising ability.

The present invention discloses a multi-mode digital valve group hydraulic control system, which mainly includes a pump source, an overflow digital valve group, a pressure compensation digital valve group, a forward speed regulation digital valve group, a reverse speed regulation digital valve group, a forward pressure regulation digital valve group, a reverse pressure regulation digital valve group, a multi-mode controller, and a pressure sensor. The digital valve group is composed of multiple digital valves with output flows arranged according to a certain rule in parallel, and has high redundancy and fault tolerance. This system only uses the digital valve group as the control element, overcomes the design concept of functional elementization in traditional hydraulic systems, transfers the functions from the hardware level to the software level, and can realize functions such as stable pressure overflow, multi-functional commutation, pressure compensation, speed and force compound control, etc. by means of software programming, and has the advantages of high intelligence, high reliability, and low cost.