106 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.

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 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 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.

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.

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.

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.

This application provides a method and apparatus for adjusting a vehicle's memory-based navigation speed. The method includes: in response to activating the memory-based navigation function, identifying the road type and number of lanes where the vehicle is located, and determining the road environment speed limit based on the road type, number of lanes, and memory-based speed data; in response to the vehicle reaching a continuous intersection section, determining the continuous intersection speed limit based on the vehicle's constant speed driving time and acceleration / deceleration time, as well as the continuous intersection speed limit range; in response to collecting speed limit sign information and / or electronic eye speed limit information, determining the speed limit sign speed limit and / or electronic eye speed limit; and determining a target cruise speed based on at least two of the following: the road environment speed limit, the continuous intersection speed limit, and the speed limit sign speed limit and / or electronic eye speed limit. Through this method, the system continuously adapts to changes in user driving habits and road conditions, improving user acceptance, stickiness, and satisfaction with the memory-based navigation function.

The application provides a kind of automatic regulation method of cruise vehicle speed, system, vehicle controller and electric vehicle.The method comprises: obtaining vehicle motion information, first preset acceleration threshold and second preset acceleration threshold, the first preset acceleration threshold is used to control cruise vehicle speed up, and the second preset acceleration threshold is used to control cruise vehicle speed down;When judging that the vehicle motion information meets the first jump condition;Control vehicle from current speed adjustment standby state to enter speed adjustment active state, while starting to adjust the current cruise vehicle speed of the vehicle;According to the current speed adjustment state of vehicle, output adjusted cruise vehicle speed.The method provided by the application can automatically adjust the cruise vehicle speed in advance, realize reasonable cruise vehicle speed adjustment process, and improve user comfort.

The invention belongs to the technical field of aircraft performance design, and particularly relates to a method and system for designing a maximum voyage cruise mode of a subsonic aircraft, and the method comprises the steps: firstly obtaining a lift coefficient of maximum voyage cruise based on the characteristics of cruise performance and a lift-drag ratio rule at a given speed; then, the Mach number of maximum-voyage cruise is obtained based on the law of aerodynamic characteristics and oil consumption characteristics; and finally, the cruise weight and the atmosphere model are introduced to obtain the optimal cruise height of the maximum voyage cruise, so that the change strategy of the cruise height of the aircraft under different weight conditions is obtained. According to the scheme, the cruise factor is used as an analysis tool, and the maximum voyage cruise modes, including the cruise height, the cruise speed and the lift coefficient, of the subsonic jet aircraft under different weight conditions are constructed. In the model construction process, the method fully considers the balance between the precision requirement of data and the calculation complexity, so that the accuracy of the result is ensured, and the excessive complex calculation process is avoided.

This invention relates to an adaptive coasting control method and apparatus in cruise mode, belonging to the field of assisted driving technology. The adaptive coasting control method in cruise mode includes: acquiring multiple downhill sections within a map data coverage area that meet preset conditions; determining the target downhill section the vehicle is about to reach based on the vehicle's current position; and determining the starting point position for coasting in neutral mode based on the starting point position of the target downhill section, the vehicle's current speed, the target cruise speed, the lower limit of cruise speed fluctuation, and the vehicle's running resistance. This invention reduces the complexity and cost of coasting in neutral mode during cruise through simplified control steps and is applicable to complex roads with multiple downhill sections, improving the flexibility of the coasting control strategy.

The application relates to a vehicle speed control method and device for assisting automatic driving and electronic equipment, and belongs to the technical field of automatic driving. The control method comprises the following steps: obtaining a safe vehicle speed interval through a vehicle flow speed, a minimum set cruise speed, a maximum set cruise speed and a speed limit; obtaining a passing vehicle speed interval of the i-th round of green light through a remaining distance, an i-th round of green light starting time point, an i-th round of green light ending time point and a current time point; then obtaining passing vehicle speed intervals of n rounds of green light; and adjusting the vehicle speed according to the intersection of the safe vehicle speed interval and the passing vehicle speed interval, so that the vehicle reaches a green light passing state when reaching the current red and green light, the probability of stopping at the intersection when encountering a red light is effectively reduced, the number of vehicle stopping and starting is effectively reduced, the power consumption of vehicle driving is reduced, and the user's riding experience is improved.

The invention discloses a cruise auxiliary control method and system of a vehicle, the vehicle, equipment and a medium. The cruise auxiliary control method of the vehicle comprises the steps that information of traffic lights in front of a vehicle driving path is obtained; obtaining current driving data and position information of the vehicle; determining a corresponding driving strategy according to the information of the traffic light and the current driving data and position information of the vehicle; and controlling the cruising speed of the vehicle according to the driving strategy. By adopting the embodiment of the invention, the driving strategy and the cruising speed can be intelligently planned according to the information of the traffic light and the driving state of the vehicle, the time for waiting for the traffic light after parking is effectively shortened, the starting and stopping frequency of the vehicle can be further reduced, and efficient and energy-saving passing of the vehicle in a signal lamp period is realized.

This application relates to a cruise control method, apparatus, computer equipment, and storage medium for a hybrid vehicle. The method includes: when the hybrid vehicle is in cruise mode, determining the battery adjustment power based on the target cruise speed and the current vehicle speed; determining the generator output torque and drive motor power based on the battery adjustment power and the current engine power; determining the vehicle's cruise torque based on the drive motor power and the generator output torque; and controlling the hybrid vehicle according to the vehicle's cruise torque. This method can improve the stability of the hybrid vehicle when cruising at a constant speed based on the target cruise speed.

The application discloses a vertical take-off and landing fixed-wing aircraft based on thrust vector nozzles, which comprises four engines, four thrust vector nozzles, a wing, a fuselage, a T-shaped tail wing and a support; four sets of power devices adopt a four-point isosceles trapezoidal symmetrical layout, and front and rear power devices are symmetrically arranged about the gravity center of the whole machine. The transverse spacing of the front power device is 2.5-3 times that of the rear power device, the spanwise projection is located at 40%-60% of the wing span length, and the height is matched with the wing leading edge to realize jet flow lift increase; the height and horizontal position of the rear power device are optimized to ensure stable air intake. The thrust vector nozzle takes the horizontal axis of the fuselage as the 0° reference, the vector angle adjustment range is not less than -95°-+15°, and the hovering, mode transition and steady switching of the flat flight are realized through differential adjustment. The application cancels the tilting mechanism, reduces the structural dead weight, reduces the aerodynamic interference, and improves the cruising speed and flight safety.

The application discloses a vehicle cruise speed control system and method, a storage medium and a vehicle, and relates to the technical field of intelligent driving, the vehicle cruise speed control system comprising: a road information automatic acquisition device, a manual input device, a main control module, a display module and a cruise control module; wherein the road information automatic acquisition device is used for collecting speed limit information of a road section where a target vehicle is currently located; the manual input device is used for manually setting speed control information; the main control module determines a cruise speed setting mode and a cruise speed setting value of the target vehicle according to the received speed limit information and / or speed control information; the main control module determines a cruise speed identifier according to the cruise speed setting mode and the cruise speed setting value, controls the display module to display the cruise speed identifier, and instructs the cruise control module to control the cruise speed of the target vehicle according to the cruise speed setting value, so as to distinguish the indication and control strategy of the automatic setting and manual setting of the cruise speed.

This application provides a method, device, storage medium, and product for controlling vehicle speed on curves. The method acquires road condition information of a target road segment during vehicle travel. Based on the curvature and slope of the road condition information, it determines the road segment type. Then, based on the road segment type and the road condition information of the target road segment, it determines the corresponding cruise speed threshold and braking speed threshold. The vehicle speed is then controlled on the current road segment based on these thresholds. Therefore, by combining the curvature and slope of the road segment, this application determines the cruise speed threshold and braking speed threshold for the vehicle when turning on a slope. By controlling the turning speed using these determined speed thresholds, the risk of loss of control and collision during turns is reduced, thereby improving vehicle turning safety.

This application provides a cruise speed control method, electronic device, storage medium, and program product. The method includes: acquiring cruise speed, current speed, and road information when the cruise scenario changes; determining the vehicle operating mode based on the cruise speed, current speed, and road information; then, when the vehicle operating mode is a target mode, determining the corresponding target speed based on the vehicle operating mode, and controlling the actual speed in a stepped manner to reach the target speed. This method, in the target mode, ensures sufficient power for the vehicle in these target modes by controlling the actual speed in a stepped manner, avoiding insufficient power in these modes and improving the driving experience.

A truss-born watercraft supported above at least two, preferably three, planing skis. An outboard motor may be positioned within or above one or more of the skis to provide propulsion. A freight or passenger compartment may be secured and / or supported by the truss members above the water line. As the watercraft hits a cruising speed, skis are lifted above the water level allowing planning of skis and extreme improvement in mobile efficiency.