40 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 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.

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 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 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.

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.

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 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 invention relates to the field of vehicle control, in particular to a vehicle braking force distribution method and device, a vehicle controller and a vehicle. The vehicle braking force distribution method comprises the steps that passenger dynamic posture parameters are obtained, wherein the passenger dynamic posture parameters comprise the trunk inclination angle and the gravity center forward moving speed of a passenger in a vehicle; a front axle braking force attenuation coefficient matched with the passenger dynamic posture parameters is determined; the total required braking force of the vehicle and the basic braking force of a front axle are obtained, and the basic braking force of the front axle is the braking force distributed for the front axle of the vehicle under the condition that no passenger dynamic posture intervention exists; attenuation adjustment is conducted on the front axle basic braking force based on the front axle braking force attenuation coefficient, and front axle target braking force is obtained; a rear axle target braking force is determined based on the total demand braking force and the front axle target braking force. The safety and comfort of the vehicle can be improved in the vehicle braking process.

This invention provides a control method and control device for a steering chassis of a new energy vehicle. The control method includes: S1, acquiring the current forward speed of the vehicle, the steering requirement angle, and the actual rotation angle sensed by an angle sensor component, wherein the actual rotation angle is the angle of rotation of the front frame and the rear frame around a rotation point; S2, determining the speed difference between the drive wheels in the current driving mode based on the vehicle's current driving mode, pre-configured vehicle steering parameters, and the vehicle speed and steering requirement angle obtained in S1, or determining the speed difference between the drive wheels in the current driving mode based on the steering requirement angle; S3, controlling the rotational speed of the drive motor in the current driving mode according to the speed difference determined in S2 and the actual rotation angle obtained in S1. This invention can reduce the complexity of the steering chassis, save energy consumption during steering, and improve the vehicle's steering response speed and steering angle.

The invention relates to an ATO (automatic train operation) time adjustment speed online calculation method and device and a medium, the method is used for time adjustment speed online calculation of a city motor train unit train in an interval temporary speed limit scene, and the method comprises the following steps: an online planning stage of a close running speed curve is used for calculating a most limited speed area of a train body range, obtaining a tight running speed curve by integrating the results of the forward speed planning and the backward speed planning; and in the online adjustment stage of the real-time running speed of the train, based on the planned close running speed curve, the real-time position of the train head is used as a starting point, and the time adjustment speed meeting the expected running time constraint is iteratively searched. Compared with the prior art, the method has the advantages of solving the problem of arrival morning and evening of the urban motor train unit train in the temporary speed limit scene and the like.

The application discloses a kind of underactuated unmanned ship track tracking control methods based on adaptive sliding mode, steps are as follows: step 1: according to model parameter uncertainty and external disturbance influence factor, the motion equation of the mathematical model of describing underactuated unmanned ship in horizontal plane three degrees of freedom is established;Step 2: the tracking error dynamic equation is established by tangential trajectory coordinate system;Step 3: based on Lyapunov stability theory, according to tracking error dynamic equation, trajectory tracking guidance law is designed;Step 4: barrier function and super-torsion integral sliding mode method are used, according to the expected bow angle and expected forward speed in trajectory tracking guidance law, motion equation, the sliding mode controller of forward speed and bow angle is designed, and unmanned ship is controlled by the sliding mode controller of forward speed and bow angle.The application obtains expected forward speed and expected bow angle by designing track tracking guidance law, based on Lyapunov stability theory, and then guarantees the convergence of tracking error.

The invention belongs to the technical field of AUV (Autonomous Underwater Vehicle) navigation control, and particularly relates to an AUV hovering to navigation mode switching process control method, which comprises the following steps of: determining a forward navigation speed switching interval of a rudder effect of an AUV horizontal rudder from basically invalid to obvious action effect; respectively constructing a first vertical plane controller for a rudder control mode and a second vertical plane controller for a vertical auxiliary propeller control mode; designing a thrust weight distribution function based on the forward speed; in actual navigation of the AUV, output instructions of the two vertical plane controllers are fused and dynamically distributed and compound control actions of a horizontal rudder and a vertical auxiliary propeller are executed according to forward speed collected in real time and combined with a thrust weight distribution function, and smooth switching control from a hovering mode to a navigation mode is achieved. According to the method, smooth and stable control over the sailing mode switching process is achieved on the basis of changing the use mode of the executing mechanism and combining dynamic distribution of force and torque of the executing mechanism, and the sailing control precision in the task executing process is improved.

This disclosure provides a steering control method and a vehicle steering system, relating to the field of vehicle steering. The steering control method includes: acquiring the vehicle's forward speed u. i According to the forward speed u i Determine the current driving condition of the vehicle, which includes low-speed, medium-speed, and high-speed conditions; if the vehicle is in a low-speed condition, set the transmission ratio i of the vehicle's steering system. a Equal to the first target value; if the vehicle is in a medium-speed operating condition, the transmission ratio i of the vehicle steering system a Determined by formula (1); if the vehicle is in high-speed operation, the transmission ratio i of the vehicle steering system is... a The formula (1) is used to determine the steering performance. This disclosure achieves the requirements of flexible steering at low speeds and stable steering at medium and high speeds. At high speeds, it reduces the yaw rate gain and lateral acceleration gain, ensuring good emergency avoidance capabilities of the vehicle at high speeds while maintaining steering stability.

The present invention relates to an apparatus (1) for coating a medical invasive component (100) having a longitudinal axis (101) and a side surface (102) that is rotationally symmetric with respect to the longitudinal axis (101) and extends linearly in the longitudinal direction, comprising: a rotating device (10) configured to clamp the invasive component (100) and to drive the invasive component (100) to rotate at a specified rotational speed (U) about its longitudinal axis (101); a coating device (20, 20a) that is immovable in the rotational direction with respect to the longitudinal axis (101) and configured to apply a specified amount (R) of a viscous coating solution (S) to the side surface (102) of the rotating invasive component (100); and the longitudinal axis (101 The system comprises a linear motion device (30) configured to move relatively linearly between a coating device (20, 20a) and a rotating device (10) at a predetermined forward speed (V) along the longitudinal axis (101) by a drive mechanism, and a control device (40) configured to control the rotational speed (U) of the rotating device (10), the coating amount (R) of the coating device (20, 20a), and the forward speed (V) of the linear motion device (30), wherein the control device (40) is configured to control the rotational speed (U), the coating amount (R), and the forward speed (V) in a cooperative manner according to the viscosity (C) of the viscous coating solution (S), so that the viscous coating solution (S) can be applied to the entire surface of the side surface (102) in the form of a spiral (H) that overlaps along the longitudinal axis (101).

This invention belongs to the field of motor control and discloses a method for re-energizing a permanent magnet synchronous motor with speed control based on two-phase terminal voltage detection. The method includes: acquiring arbitrary two-phase terminal voltages to reconstruct the line back electromotive force (EMF) and deriving the phase relationship between the line back EMF and the A-phase back EMF; filtering the reconstructed line back EMF and constructing orthogonal signal pairs of the line back EMF; using the orthogonal signal pairs of the line back EMF as input to a phase-locked loop (PLL) to extract the phase and frequency of the line back EMF and obtain the motor's position and speed; if the amplitude of the line back EMF is less than an amplitude threshold, switching to normal start mode; otherwise, if the motor rotates in reverse, switching to reverse speed control re-energizing mode; if the motor rotates forward, switching to forward speed control re-energizing mode. This invention reduces hardware costs and complexity, and decreases the number of analog sampling pins occupied by the microcontroller's ADC. It reduces noise and dependence on current sampling accuracy, enabling rapid and accurate monitoring of the motor's speed and position information.

Described is a system for determining the forward speed of at least one vehicle, comprising control means, each associated with at least one axle, and a communication means for transmitting signals or values between the control means. At measurement instants successive in time, each control means generates a corresponding sliding signal of the respective at least one axle. At a sharing instant, each control means transmits the respective sliding signal, and in the no-sliding condition, the value of a quantity related to the rotation of the respective axle or its own estimated forward speed of the vehicle to the other control means. When all the sliding signals indicate a sliding condition, one of said control means controls first braking means associated with one of the axles, so as to reduce a braking force applied to said axle.

The invention discloses a composite configuration aircraft which comprises a fuselage, an undercarriage arranged below the fuselage, a main rotor wing unit arranged above the fuselage and a horizontal tail arranged at the rear end of the fuselage and further comprises tilting rotor wing units arranged on the two sides of the fuselage and located below the main rotor wing unit in space. The vertical fins are longitudinally arranged in space and are positioned at the tail end of the fuselage; and the tail rotor is arranged at the tail end of the fuselage and is spatially vertical to the vertical fin. Compared with the prior art, on the basis of an existing helicopter structure, the tilting rotor wing unit is additionally arranged to serve as an auxiliary power source, and therefore the using load of the helicopter can be effectively improved when the helicopter vertically takes off and lands and flies forwards at a low speed; when the helicopter flies forwards at a high speed, the forward flying tension can be effectively improved, so that the maximum use load of a conventional helicopter can be increased, and the maximum forward flying speed of the conventional helicopter is improved.

This application relates to an automatic parking dynamic gear shifting method, system, device, and storage medium. The automatic parking dynamic gear shifting method is characterized by comprising: responding to an automatic parking command, shifting gears while the vehicle is traveling in a first direction to a gear corresponding to a second direction opposite to the first direction, wherein the first direction is a forward direction and the second direction is a reverse direction; a drive motor providing torque to the vehicle in the second direction to drive the vehicle speed to gradually decrease from the forward speed in the first direction to 0, and when the forward speed in the first direction is 0, the torque in the second direction is not 0. Therefore, this solves the technical problem in related technologies where automatic parking requires first stopping the vehicle and then shifting gears to start, resulting in low shifting efficiency and a poor user driving experience.

This application provides a high-consistency paddy field planting ridge forming device and method. The device includes: a frame; a furrow opener disposed on the frame; a first compaction mechanism including a first linear drive, a first rotary drive, and an intermediate roller; the first linear drive is used to drive the first rotary drive to move vertically; the first rotary drive is used to drive the intermediate roller to rotate to compact the ridge top; each second compaction mechanism includes: a second linear drive, a second rotary drive, and a side roller; the second linear drive is used to drive the second rotary drive to move horizontally; the second rotary drive is used to drive the side roller to rotate to compact the ridge shoulder. A controller is signal-connected to each drive component and is configured to: set the ground load of the intermediate roller and the side roller based on soil information; the ground load of the side roller is greater than the ground load of the intermediate roller; set the linear speed of the intermediate roller based on soil information and the device's forward speed; the linear speed of the side roller is equal to the device's forward speed.

This invention relates to a ship resonant icebreaking device, comprising a base, a load-bearing rod, a load-bearing hydraulic rod, an impact wheel, a hatch, a hatch linkage, and a reduction motor. The base is fixed to the ship's deck, and the load-bearing rod is hinged to the base. Both sides of the load-bearing rod are connected to the base via front and rear load-bearing hydraulic rods, respectively. The front end of the load-bearing rod is connected to the impact wheel located at the hatch. The hatch is connected to the reduction motor via a hatch linkage. Based on the natural frequency f1 of the ice layer in the navigation area, the ship's speed is adjusted to achieve an impact frequency f1 generated by the impact wheel. n The impact wheel operates at the same natural frequency f1 as the ice layer, achieving a resonant icebreaking effect. Under the same displacement conditions, this invention can provide a greater impact force to the ice layer. During icebreaking operations, no additional power equipment is required; the impact wheel rotates using the ship's forward speed, thus completing the icebreaking operation with lower energy consumption.

During aircraft descent, flight control systems seek and maintain a glide slope determined from a single pilot input parameter; e.g., the position of a control axis of a flight stick. Appropriate guide slope selection by the pilot is readily determined from the pilot's visual observation of an intended landing site during landing approach. The glide slope defines a ratio of forward speed and descent speed which is automatically established and maintained / updated according to pilot input while these speeds are also automatically reduced during descent, despite the two speed directions respectively being affected distinctly and differently by aircraft mechanisms which control them. The aircraft ends its glide path with speed at or near zero, allowing landing by short vertical descent. Accordingly, the pilot offloads problems of both coordinating speeds to achieve a particular guide slope, and reducing them while maintaining this coordination.

This utility model relates to a mulching machine for garlic cultivation, including a frame and wheels mounted on the lower end of the frame. A push frame is mounted on one side of the frame, and mounting plates are provided on both sides of the frame. A clamping assembly is rotatably mounted on the upper end of the mounting plates, and a guide roller is rotatably mounted on the lower end of the opposite side of the mounting plates. The two mounting plates and the frame are movably connected by an adjusting assembly. This utility model can clamp and fix both ends of the mulch roll through the clamping assembly at the top, optimizing the installation position of the mulch roll. When changing the mulch roll, there is no need to lift the frame, making the installation and replacement of the mulch roll more time-saving and labor-saving. At the same time, a conveying roller is added, which is connected to the power wheel. When the frame moves, the power wheel contacts the ground and rotates, thereby driving the synchronous rotation of the conveying roller to convey the mulch film, ensuring that the conveying speed of the mulch film is consistent with the forward speed of the mulching machine, and preventing the mulch film from wrinkling or tearing.

The invention relates to a multi-engine aircraft having an economic operation mode and a method of application, the aircraft (1) having a rotary wing (5) having a power plant (10) comprising a plurality of engines (11, 12), said aircraft (1) comprising a human-machine interface (20) controlling a control member (7) capable of acting on the longitudinal acceleration of the aircraft (1). During the economic operation mode in which one of the engines does not provide power, the method comprises: (i) measuring the forward speed of the aircraft (1), (ii) using a flight control computer (80) to adjust the authority of said human-machine interface (20) on said longitudinal acceleration as a function of the forward speed (V).