144 results about "Cruise speed" patented technology

The present application relates to the technical field of autonomous driving functions, and in particular to a control method and device integrating predictive cruise and lane changing decision-making. The method comprises: receiving the accelerations, speeds and positions of a controlled autonomous driving vehicle and surrounding traffic vehicles at a current moment so as to construct an IDM microscopic following model to predict surrounding traffic vehicle states in a preset future long time domain; on the basis of the surrounding traffic vehicle states in the preset future long time domain, constructing an optimization cost function, so as to plan a lane keeping strategy or lane changing strategy; on the basis of the lane keeping strategy or lane changing strategy, using a quintic polynomial to solve for a reference path; on the basis of the reference path, establishing an optimal control problem cost function for continuous intersection predictive cruise control, so as to solve for the optimal cruise speed within a traveling lane; and sending the reference path and the optimal cruise speed within the traveling lane to the controlled autonomous driving vehicle for control. Thus, the problems that existing lane changing decision-making only considers longitudinal motion and fails to pay attention to a development trend of the surrounding environment, possible dangers and the like are solved.

A fan section of an aeronautical propulsion system includes a fan rotor including seventeen blades to twenty blades and having a solidity strictly less than 1.0. The solidity is equal to a ratio between a chord at the blade tip and an inter-blade pitch at the blade tip. The fan section has a hub-tip ratio greater than or equal to 0.22 and less than or equal to 0.32, a pressure ratio greater than or equal to 1.05 and less than or equal to 1.5, and a peripheral speed at the blade tip greater than or equal to 260 m / s and less than or equal to 400 m / s. The pressure ratio and the peripheral speed are measured at cruising speed.

The invention relates to an automobile urban artery cloud control energy-saving cruise system and method based on a high-precision map, and the method comprises a cloud control platform which is used for predicting the queuing dissipation time of at least one automobile based on a target high-precision map and corresponding road traffic information, so as to generate an automobile speed sequence meeting a preset optimal condition; the vehicle-mounted platform of the at least one automobile is in communication connection with the cloud control platform and is used for planning a target cruise speed of the at least one automobile based on the automobile speed sequence meeting the preset optimal condition and the actual state of the at least one automobile; and determining a vehicle speed track of at least one vehicle meeting a preset optimal condition based on the target cruising vehicle speed, and controlling the at least one vehicle to run according to the vehicle speed track meeting the preset optimal condition. The global vehicle speed is planned based on the dynamic change of the queuing dissipation time in combination with the traffic information of multiple intersections, so that frequent start and stop are effectively reduced, and the passing efficiency and the energy-saving effect of the vehicle are improved.

The invention relates to a foldable tilting four-rotor aircraft concept scheme design method based on task requirements. According to the method, task demand indexes such as voyage, cruising speed, task load, cruising height and hovering height are used as input, and the total design weight, power device parameters, rotor wing geometric parameters and fuselage and wing parameters of the aircraft are determined in sequence; and performance indexes such as hovering lift limit, level flight speed, climbing performance, practical lift limit, voyage and endurance in a helicopter mode and a fixed wing mode are calculated and analyzed respectively. And performing matching judgment on a performance calculation result and a task requirement, and performing iterative adjustment on key parameters such as a paddle disc load when the task requirement is not met, so as to form a closed-loop concept design process driven by the task requirement. According to the method, the vertical take-off and landing capacity and the fixed wing cruising performance can be systematically considered in the conceptual design stage, and systematicness, repeatability and engineering feasibility of scheme design of the folding type tilting four-rotor aircraft are improved.

The invention relates to the technical field of image processing, and discloses a fish school target tracking and cruise calculation method based on a sonar image, and the method comprises the steps: obtaining a sonar video set and a parameter set collected by a sonar sensor array, and carrying out the equal-time-interval frame decoding processing, and obtaining a first video frame set; performing screening and denoising to obtain a second video frame set; based on the second video frame set, the parameter set and a pre-trained identification model, determining position data and fish school type data of a target fish school; performing identification frame labeling on each video frame image in the second video frame set; and extracting target data of the recognition frame, and calculating the swimming speed of the target fish school. Through the implementation of the method and the device, comprehensive and accurate data acquisition, high-quality image processing and accurate target identification and tracking are realized, and the problems that related technologies are not perfect, targets are easy to lose or misjudge when multi-target tracking is processed, and the requirement of accurate measurement of the fish school speed cannot be met are solved.

The invention discloses a commercial vehicle cruise control method and system giving consideration to physiological strain and energy conservation. The method comprises the following steps that a human body physiological strain index is constructed, a vehicle oil consumption and energy conservation index is constructed, an optimal cruise speed planning model is established, and the vehicle oil consumption and energy conservation index and passing time are comprehensively considered to form an overall reward function; a reinforcement learning algorithm is introduced for solving, and the optimal cruise speed within the predicted duration is obtained; constructing a vehicle-seat-human body system longitudinal and vertical coupling dynamic model, and calculating a human body physiological strain index under the optimal cruise speed; vehicle state constraints and optimal cruise speed sequence tracking constraints are coded as control constraints, and a longitudinal model prediction control strategy is formed based on a human body physiological strain index, a vehicle fuel consumption energy-saving index and tracking deviation; and a pitching regulation and control mechanism is added to realize vertical ceiling hybrid control, and the vehicle suspension is regulated and controlled. The vehicle cruising performance can be improved, and collaborative optimization of human body physiological strain and vehicle energy saving is achieved.

Provided in the present application are an intelligent driving method and apparatus, and a vehicle, which are applied to the field of intelligent driving. The method comprises: detecting a first obstacle, wherein the first obstacle is a dynamic obstacle; on the basis of first information of the first obstacle and first traveling information of a vehicle, determining a first risk level, wherein the first risk level is used for representing the possibility of the first obstacle colliding with the vehicle under the first information and the first traveling information; acquiring a first cruise speed matching the first risk level, wherein the first cruise speed is the lowest traveling speed at which the vehicle avoids a collision with the first obstacle under the first risk level; and controlling the vehicle to travel at the first cruise speed. By means of the present application, the flexibility of a vehicle avoiding a dynamic obstacle in an autonomous driving cruise state can be improved, the safety of the vehicle is guaranteed, and the traveling efficiency, passage efficiency and assertive-merging capability of the vehicle are also improved, thereby improving the driving and riding experience.

The invention discloses a low-altitude flight path planning method based on grid coding, which relates to the technical field of path planning, and is characterized in that on the basis of space and time grid coding, an A * path planning algorithm is improved, a neighbor node range in a classical algorithm is expanded, pruning optimization for removing invalid neighbors is applied to the A * path planning algorithm, and the path planning efficiency is improved. Relatively fast searching and establishment of a smooth grid path meeting the motion constraint become possible; an algorithm for interpolating a track on a grid path at equal time intervals is introduced; comprising the following steps of: thinning and smoothing a grid path; carrying out mathematical modeling on a flight state of the unmanned aerial vehicle; calculating flight segment initial and final speeds and flight segment middle cruising speeds which meet the motion performance constraint of the unmanned aerial vehicle and the consistency between flight segments by a backtracking iteration method; and calculating specific flight path points by speed integration. And a relatively accurate unmanned aerial vehicle flight plan track prediction generation method is provided.

The invention provides a vehicle cruise speed control method and device, a vehicle-mounted electronic control unit and a vehicle, and relates to the technical field of intelligent driving. The method comprises the following steps: acquiring the current speed and navigation map information of a vehicle in an intelligent driving mode; the navigation map information comprises road congestion information and vehicle positions of vehicles; determining a first variable speed of the vehicle according to the road congestion information and the vehicle position; and determining a first variable speed position of the vehicle based on the first variable speed and the current vehicle speed, and controlling the vehicle to perform variable speed cruise driving at the first variable speed position according to the first variable speed. The device is used for executing the method. The variable speed of the vehicle is determined according to the navigation map information of the vehicle, and the variable speed position is determined according to the variable speed and the current vehicle speed of the vehicle, so that the vehicle is controlled to perform variable-speed cruise driving at the variable speed position according to the variable speed. By adjusting the vehicle speed in advance, the probability of occurrence of accidents that the front vehicle collides with the rear vehicle and the rear vehicle collides with the rear vehicle is reduced, and therefore the road passing efficiency and safety are improved.

The invention relates to the technical field of robots and automatic control, and discloses a robot dog cruise speed control method based on self-adaptive PID (Proportion Integration Differentiation). According to the method, cross validation is carried out on local control parameters generated by the robot dog through the distributed consensus network, and effectiveness and credibility of the local control parameters are ensured. And after the verification is passed, the master control node collects all effective parameters, executes a multi-stage data fusion and global controller updating process, generates a new generation of global control parameters, and synchronously distributes the new generation of global control parameters to all robot dogs. According to the method, the reliability and the anti-interference capability of the control system are enhanced by using a distributed consensus mechanism, and the control precision of the cruise speed and the cluster adaptive learning efficiency are improved by intelligently fusing group experience.

A method for predictive cruise control of a vehicle includes: specifying a cruise speed and an optimal cruise requirement; according to the road condition information of the road section ahead and the current driving dynamic condition, limited by the driving dynamic parameters, of the vehicle, the possible speed track of the vehicle on the road section ahead is determined, and the road condition information comprises gradient information, curvature information and speed limiting information; an optimal speed trajectory is selected from the possible speed trajectories, and the optimal speed trajectory corresponds to the speed trajectory with the minimum comprehensive cost under the condition that the optimal cruise requirement is met; the optimal speed trajectory is used as a target vehicle speed trajectory for predictive cruise control of the vehicle. According to the method, the optimal cruise speed and engine torque requirements can be comprehensively planned in combination with various road condition information, so that the optimal cruise requirements of at least saving energy consumption and / or saving time and / or avoiding excessive and overweight use of a service brake are met. An apparatus for predictive cruise control of a vehicle, an electronic device for predictive cruise control of a vehicle, a vehicle, and a computer readable medium are also disclosed.

A vertical takeoff and landing (VTOL) aircraft includes a maximum takeoff weight (MTOW) of about 1700-kg, a cruising speed of about 80-knots equivalent airspeed (EAS) to about 100-knots EAS, a nominal range of about 300-km, a nominal flight time of about 4-hours, and at least one pair of rotors configured to provide vertical thrust. Each rotor of the at least one pair includes an about 2-meter propeller diameter, a disk loading of about 67-kg / m2 to about 110-kg / m2, and an operating speed of about 1800 rotations-per-minute (RPM) to about 2700-RPM.

The application discloses a kind of vehicle's cruise brake method, device, storage medium and terminal, method includes: in cruise mode, the cruise speed of vehicle is obtained with real-time speed;Vehicle driving state is judged according to the cruise speed and the real-time speed;When vehicle is in downhill overspeed state, the auxiliary brake and / or brake of vehicle are started and keep cruise mode.In the present application, when vehicle is downhill, the speed of vehicle is controlled by maintaining cruise mode and starting auxiliary brake or brake of vehicle, so as to link cruise mode with auxiliary brake / brake, so as to improve driving safety and driving experience without manual operation.

The invention relates to the field of new energy automobiles, and discloses a vehicle endurance mileage determination method and device, a vehicle and a medium. According to the method, a dynamic simulation model is constructed based on a model architecture of the vehicle, simulation data output when the vehicle runs under various working conditions are simulated according to the dynamic simulation model, and the endurance mileage of the vehicle is determined. The simulation data comprises at least one of an average speed, a maximum speed, an average cruise speed and an idling time ratio; establishing an energy consumption prediction model on the basis of the simulation data, and training a mileage calculation model for predicting the mileage by taking a prediction result of the energy consumption prediction model as training data; and migrating the mileage calculation model to the target vehicle for optimization to obtain a final mileage calculation model so as to determine the endurance mileage of the target vehicle. According to the method, the problem of large prediction deviation of a traditional method is solved, the prediction accuracy of the endurance mileage of the new energy automobile is improved, and meanwhile, the user driving experience and the driving safety are improved.

The invention relates to a vehicle control method and a vehicle. The method comprises the steps that under the condition that the vehicle meets the activation condition of the constant-speed cruise function, the current vehicle speed of the vehicle and the cruise speed configured for the constant-speed cruise function are obtained, under the condition that the cruise speed and the current vehicle speed are inconsistent, the vehicle demand torque is determined according to the cruise speed and the current vehicle speed, and the vehicle demand torque is determined according to the driving influence information of the vehicle. And processing the vehicle demand torque to obtain a target vehicle torque, and controlling the vehicle to cruise at a constant speed according to the target vehicle torque. By adopting the method, the driving safety of the vehicle can be improved.

A fan section of an aeronautical propulsion system includes a fan rotor including seventeen blades to twenty blades and having a solidity strictly less than 1.0. The solidity is equal to a ratio between a chord at the blade tip and an inter-blade pitch at the blade tip. The fan section has a hub-tip ratio greater than or equal to 0.22 and less than or equal to 0.32, a pressure ratio greater than or equal to 1.05 and less than or equal to 1.5, and a peripheral speed at the blade tip greater than or equal to 260 m / s and less than or equal to 400 m / s. The pressure ratio and the peripheral speed are measured at cruising speed.

The invention discloses a turbojet power logistics unmanned aerial vehicle based on a fixed wing structure and a control method. The unmanned aerial vehicle comprises a carbon tube fuselage, cork wood wings, a full-motion horizontal empennage, double vertical empennages, a nose fairing, a storage bin, a turbojet engine, an undercarriage, a flight control system and an emergency parachute. According to the turbojet power logistics unmanned aerial vehicle based on the fixed wing structure and the control method, the fixed wing structure and the turbojet engine are organically combined, short-distance take-off within 50 meters can be achieved, compared with a traditional propeller type fixed wing unmanned aerial vehicle, the take-off distance is shortened by 40% or above, the cruising speed can reach 80 km / h-120 km / h, the unmanned aerial vehicle can be matched with a standard material box of 200 mm * 200 mm * 400 mm, and the unmanned aerial vehicle is suitable for large-scale popularization and application. The flight control system supports two modes of manual remote control and automatic driving, and is equipped with an emergency parachute, so that safe parachute recovery of the unmanned aerial vehicle in an emergency state is realized, and the problem that a traditional unmanned aerial vehicle has obvious limitation when meeting emergency material delivery requirements is effectively solved.

The invention discloses a coaxial main rotor-tiltable multi-slave rotor heterogeneous vertical take-off and landing layout, and relates to the technical field of vertical take-off and landing aircrafts, the coaxial main rotor-tiltable multi-slave rotor heterogeneous vertical take-off and landing layout comprises a fuselage, a fixed wing surface, a coaxial main rotor system and a vector slave rotor system; the vector slave rotor systems are divided into a front group and a rear group in the longitudinal direction and have independent tilting capacity; the method is characterized in that in a helicopter mode, a large-size coaxial main rotor specially optimized for hovering provides main lift force, and a vector slave rotor provides attitude control through tilting and differential speed; in the fixed wing mode, the coaxial main rotor stops rotating and is locked as an auxiliary wing surface, the fixed wing surface in the middle of the auxiliary fuselage provides lift force, and a vector is converted into horizontal from a rotor system to provide forward flying thrust / pull force; transition between the two modes is achieved by controlling the front slave rotor wing set and the rear slave rotor wing set to execute different-direction tilting, the pitching moment can be naturally balanced in the process, and it is ensured that conversion is stable. Unification of high hovering efficiency, high cruising speed and high reliability of the aircraft is realized.

The application relates to a vehicle simulation test method and device, computer equipment, a storage medium and a computer program product. A first simulation model of a target vehicle is acquired, a simulation scene library is established, input signals and output signals of an adaptive cruise algorithm are determined in combination with a preset cruise speed, a second simulation model of the target vehicle is established, and simulation test of the target vehicle is performed according to the second simulation model of the target vehicle and the simulation scene library. The problems of high test cost, long test period and low test efficiency of the existing test method can be solved, and efficient and convenient test of the adaptive cruise function of a tractor is realized.

A method for providing a cruising speed recommendation to an operator of a vehicle includes determining a projected route; receiving route characteristic data including route elevation data; determining a sampling resolution; sampling the route elevation data at the sampling resolution to generate sampled route elevation data; determining at least one start of uphill position and at least one start of downhill position; determining at least one cruise speed route segment based at least in part on the at least one start of uphill position and the at least one start of downhill position; determining a corresponding cruising speed for the at least one cruise speed route segment based at least in part on one or more of the route elevation data and the sampled route elevation data; and communicating the corresponding cruising speed for the at least one cruise speed route segment.

The invention discloses an unmanned aerial vehicle conflict detection method based on a cruise speed range and a speed obstacle method, and relates to the technical field of unmanned aerial vehicle conflict detection, and the method comprises the steps: obtaining the telemetry data of at least two unmanned aerial vehicles, determining the cruise speed range of the corresponding model of the two unmanned aerial vehicles, and obtaining the set conflict prediction time window of the two unmanned aerial vehicles; and constructing a speed obstacle model containing a speed obstacle circle based on a speed obstacle method, and judging whether the two unmanned aerial vehicles conflict or not in combination with the telemetry data, the cruise speed range and the conflict prediction time window. A cruise speed range and a conflict prediction time window are introduced, and a speed obstacle circle combining a local vehicle and a conflict object speed range is designed for unmanned aerial vehicle conflict detection, so that the accuracy and reliability of unmanned aerial vehicle conflict detection can be improved. The improvements not only solve the limitation of the traditional speed obstacle method under the non-constant speed condition, but also provide a more flexible and efficient solution for practical application.

The invention discloses a vehicle cruise control method, device and equipment and a storage medium, and the method comprises the steps: obtaining the driving information of a target vehicle in a vehicle lane and an adjacent lane, and the driving information comprises the steering lamp state, the driving track, the position, the speed and the acceleration of the target vehicle; judging whether the target vehicle has a lane changing intention or not based on the driving information; and if the lane changing intention exists, the current cruising speed of the vehicle is controlled to approach the speed of the target vehicle in advance. According to the method, the lane changing intention of the target vehicle can be recognized in advance in the high-speed lane changing scene, so that the vehicle can start gentle deceleration control earlier, deceleration fluctuation and braking abrupt feeling are remarkably reduced, and the control comfort, smoothness and driving safety of the self-adaptive cruise system under the high-speed working condition are effectively improved.

An aircraft that can improve cruising speed by making the body shape of the airframe (especially, multicopter) into a shape that has less unnecessary positive lift force by the main body and less drag in the cruising posture of the airframe. An aircraft equipped with a plurality of rotary blades including a propeller and a motor, wherein the aircraft comprises a main body with an inverted airfoil shape. The main body has an attack angle that does not generate a lift force or produces a negative lift force during cruising. The main body has a positive attack angle of 12 degrees or less. Further, it is provided with a mounting unit on which a mounted object can be mounted. The mounting unit is connected to the main body via the connection unit.

The invention relates to an aircraft outer skin convective heat transfer coefficient test system based on airborne hang flight, belongs to the technical field of aircraft heat dissipation, and aims to solve the problem that the convective heat transfer coefficient of an existing aircraft outer skin is difficult to test. The test system comprises an aerial carrier and a test device installed on an external loading tool of the aerial carrier. The testing device comprises a skin heat exchanger, a circulating pump, a heat source plate, a temperature data collector, a thermocouple and a mounting plate, the testing device is fixedly installed on an aircraft cabin floor outside an aircraft cabin through the installation plate. According to the invention, by constructing the system and method for testing the convective heat transfer coefficient of the outer skin of the aircraft based on loading flight, the convective heat transfer coefficient of the outer skin of the airborne flight aircraft at the specified flight height and navigation speed can be accurately obtained, and the problem that the convective heat transfer coefficient of the outer skin of the existing aircraft is difficult to test and obtain is solved.

1. The name of the design product: vehicle driving information display graphical user interface of electronic equipment. 2. The use of the design product: an electronic device. 3. The design points of the design product: the interface content of the graphical user interface in the electronic equipment. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design. 6. The use of the graphical user interface: the graphical user interface is used to display the status information of the vehicle. 7. The human-computer interaction mode of the graphical user interface: design 1 front view is the interface of the normal driving mode of the vehicle, and the vehicle speed, navigation and lane environment information are displayed in the interface. Design 2 front view is the interface of the intelligent driving mode of the vehicle, and the vehicle speed, navigation and lane environment information are displayed in the interface. Design 3 front view is the speed limit reminder interface of the intelligent driving mode of the vehicle, and the speed limit information is displayed on the upper part of the vehicle speed value. Design 4 front view is the cruise speed adjustment interface of the intelligent driving mode of the vehicle, and the value of the set cruise speed is displayed on the lower part of the current vehicle speed value. Design 5 front view is the interface of the normal driving mode of the vehicle, and the vehicle speed, navigation and lane environment information are displayed in the interface, and after the user triggers the function button on the vehicle to start the intelligent driving function, the interface is switched to design 5 interface change state diagram.

A cruise control system and method for a work vehicle with vehicle interlocks, and a controller. Each vehicle interlock monitors a vehicle system status. When at least one of the vehicle interlocks is triggered, the controller notifies the operator of the triggered interlock and deactivates cruise control. An activation mechanism can activate cruise control. When the activation mechanism is activated and none of the vehicle interlocks is triggered, the controller activates cruise control and maintains current vehicle ground speed at a vehicle cruise speed. When the activation mechanism is deactivated, the controller deactivates cruise control. The cruise speed can be set to the current vehicle ground speed, or can be set by a speed selection mechanism, or can resume at a previously selected cruise speed, or can be set by another method.

This application discloses a method for adaptive cruise control of a vehicle. The vehicle includes a first function button and a second function button. The first function button is used for the non-adaptive cruise control's first function and vehicle speed adjustment function, while the second function button is used for the non-adaptive cruise control's second function and vehicle following distance adjustment function. The control method includes: in response to the adaptive cruise function being activated, detecting the operation status of the first function button within a first predetermined time and the second function button within a second predetermined time while the adaptive cruise function is activated; and if an operation of the first function button is detected within the first predetermined time, adjusting the adaptive cruise speed; or if an operation of the second function button is detected within the second predetermined time, adjusting the adaptive cruise following distance. In this way, while satisfying user needs for related functions, the number of function buttons on the vehicle is reduced, providing a layout possibility for the subsequent addition of new function buttons.

The present invention discloses a constant speed cruise control system and method for a series hybrid tractor. The method includes: the vehicle controller obtains the operating information of the tractor and determines whether it can enter the constant speed cruise state; if the operating information meets the preset constant speed cruise conditions, the cruise enable switch is activated to enter the constant speed cruise state, and the current vehicle speed is used as the cruise speed; when in the constant speed cruise state, the vehicle controller receives an operation trigger signal from the driver operating system to adjust the cruise speed, reset the cruise speed, and exit the constant speed cruise state; when the power shift is started in the constant speed cruise state, the tractor remains in the constant speed cruise activation state, so that the tractor can continue to perform constant speed cruise in the opposite direction after the power shift. This application improves the operation efficiency of the tractor through constant speed cruise, reduces the driving intensity of the driver, and can perform power shift in the constant speed cruise state, which is convenient for the tractor to turn around during operation.

This invention discloses an intelligent planning method and system for aircraft transportation missions based on real-time power prediction. The method includes: constructing a full-physics power model that couples the dynamic characteristics of the inertial measurement unit, the environmental wind field vector, and battery characteristics, and completing offline calibration; during mission execution, using an extended Kalman filter to jointly estimate the load mass and wind field vector in real time, and dynamically solving for the optimal cruise speed that minimizes energy consumption per unit distance; predicting the aircraft's remaining support distance based on the real-time calculated state and "energy bucket" model; and automatically triggering a hierarchical closed-loop strategy—prioritizing waypoint elimination, replanning the route, or immediate return—when energy is insufficient by continuously monitoring and comparing with mission requirements. This invention achieves accurate endurance prediction and autonomous mission adjustment under load changes and wind field disturbances, significantly improving the safety, adaptability, and completion efficiency of aircraft in multi-point transportation missions such as express delivery.

The application discloses a kind of multi-modal PI parameter regulation and control heavy commercial vehicle constant speed cruise control method, comprising: step one: based on vehicle signal, judge cruise state;Step two: obtain vehicle driving parameter, the vehicle driving parameter includes current speed, acceleration, current road slope;Step three: based on vehicle driving parameter, calculate constant speed cruise target torque;Step four: to constant speed cruise target torque is sequentially carried out threshold filtering, based on target speed and current speed difference dynamic adjustment first-order filtering.Step five: the target torque of vehicle control device calculated;Step six: according to target torque output control.Through three key dimensions of speed, acceleration, slope respectively design multiple PI parameters, so that control system can accurately match the control demand of vehicle in different dynamics state, significantly improve the control precision and stability of cruise speed, effectively suppresses speed fluctuation.