30 results about "Vehicular dynamics" patented technology

The invention discloses a method and a device for vehicle passive keyless entering, starting and locking based on ultra-wide band. The device comprises a vehicular key, a master controller, a door lock sensor, a starting / stopping button, a seat sensor and a vehicular body antenna array, wherein the door lock sensor, the starting / stopping button, the seat sensor and the vehicular body antenna array are all connected with the master controller through a vehicular body circuit. The method includes: using UWB (ultra-wide band) signals to precisely position the vehicular key, detecting the position of the vehicular key and the position information of personnel in the vehicle according to each trigger action of a driver, and using a joint judgment method to control operation of a vehicular door lock, a starting system and an alarming system. In addition, the vehicular key is capable of recording and storing information interested by the driver and vehicular dynamic information. Using the method and the device can better avoid accidents caused by misjudgment of the master controller or misoperation of personnel.

The invention comprises an autonomous off-road vehicle capable of traveling at high speeds. Preferred embodiments of the invention comprise a system for sensory instrument stabilization comprises three axis assemblies movable about three orthogonal axes. The invention also comprises novel methods for generating a high accuracy route for a robotically controlled vehicle. Other aspects of the invention include drive time, perception-based path adjustments to steer a robotic vehicle within an intended corridor. Another embodiment of the invention comprises the consideration of vehicular dynamics in generating a high accuracy route and in steering a robotic vehicle within an intended corridor.

An inertial sensor calibration method has steps of mounting an observer device and an inertial sensor of a vehicle carrying on an inertial move, acquiring actual vehicle motion data from the observer device and inertial signal data of the inertial sensor, calculating an integral corresponding to the vehicular dynamic variation model with respect to the inertial signal data to obtain predicted vehicle sensor data and calculating variations of the actual vehicle motion data, acquiring differences between the two calculated data, applying an energy optimization and a discretization to the differences so as to obtain parametric error variances, and feeding back the parametric error variances to the vehicular dynamic variation model to calibrate the parameters associated with offset and scale factor and acquire a calibrated vehicular dynamic variation model. Under the premise of no GPS, electronic compass or pressure sensor, the present invention can secure positioning continuity and reliability.

The invention discloses a high-speed train large system coupling dynamic simulation platform which adopts a distributed simulation system based on C / S (client / server) mode and comprises a foreground human-computer interaction interface portion and a background distributed based core calculating portion. The background based core calculating module comprises a task scheduling module, a coupling control module, an executor agent module, a vehicular dynamic calculation module, a line dynamic calculation module, a bow net dynamic calculation module, a tractive power supply calculation module and an air dynamic calculation module, and the foreground human-computer interaction interface portion comprises a main control module, a pre-processing module, a calculating resource management module, a calculation monitoring module, a post-processing module and a system management module. The high-speed train large system coupling dynamic simulation platform is supportive of multiple working conditions for simultaneous high speed train large system coupling dynamic simulation, capable of monitoring calculation process in real time, good in expansibility and supportive of heterogeneous exclusive-operation system, and provides a good platform for coupling simulation and operation simulation of a high speed train and a line, a contact network and a power supply system and coupling relation study and performance evaluation of the high speed train and other subsystems.

A computer-implemented method and system for predicting operation risks of a vehicle. The method and system obtains a training data stream of vehicular dynamic parameters and logging crash time instances; partitions the data stream into units representing dimension vectors, labels the units that overlap the crash time instances as most dangerous; labels the units, which are furthest from the units that are labeled as most dangerous, as most safe; propagates the most dangerous and the most safe labeling information of the labeled units to units which are not labeled; estimates parameters of a danger-level function using the labeled and unlabeled units; and applies the danger-level function to an actual data stream of vehicular dynamic parameters to predict the operation risks of the vehicle.

The invention relates to an automobile constant speed engine specified load detection method, which defines the rotating speed range of the automobile speed under the engine rated torque and the full-load minimum fuel consumption rate when the high speed gear is engaged in a gearbox on a chassis dynamometer by an automobile, after the test and the calculation, the load constant force value of a power absorbing device of the engine defined load is determined at the defined automobile speed point, when the load working condition is defined by the engine delta rated torque, the load is controlled by the constant force of the power absorbing device, the accelerator is adjusted and stabilized, and the vehicular dynamic property and fuel economy are detected in the constant speed at the defined automobile speed point, the method has good accuracy, validity and operability, meanwhile, the method can avoid the damages to the in-use vehicles or engines with worse technology condition, thereby increasing the detection safety.

A system that generates a dynamic seating body pressure distribution data includes a seat and a stimulus applying mechanism that is adapted to apply a stimulus to the seat. A human biofidelic manikin is provided on the seat. A seat pressure distribution sensor array is responsive to the human biofidelic manikin for generating a dynamic seating body pressure distribution data when the stimulus applying mechanism applies a stimulus to the seat.

The present invention proposes a system and method for preventing a vehicle from rolling over in curved lane. The road images captured by the image capture devices are used to calculate road information. The road information together with the vehicular dynamic information, such as the speed and acceleration of the vehicle are used to predict the rollover angle and lateral acceleration of the vehicle moving on the curved lane. The height of the gravity center and critical rollover speed of the vehicle moving on the curved lane are worked out and used to define a vehicular rollover index. If the vehicular rollover index exceeds a preset value, the system warns the driver or directly controls the speed of the vehicle to prevent the vehicle from rolling over in the curved lane.

The invention discloses a method for testing dynamic random drifting of a strap-down flexible gyroscope by the aid of a laser Doppler velocimeter, which belongs to the field of inertia technology. The method for testing dynamic random drifting of the strap-down flexible gyroscope by the aid of the laser Doppler velocimeter includes mounting the tested strap-down flexible gyroscope on a test car, and electrifying and preheating a flexible strap-down inertia unit until the flexible strap-down inertia unit is stable; synchronously acquiring data of the flexible strap-down inertia unit and data of the laser Doppler velocimeter; and keeping the test car fixed, and initially aligning fixed bases of two positions based on a course angle of 180 degrees by the aid of a Kalman filter; starting the test car, leading the car to start to run, and estimating for inertia / Doppler combined navigation for the full stroke. Accurate speed measurement of the laser Doppler velocimeter is used as observation information, random drifting errors of the flexible gyroscope in a vehicular dynamic environment are estimated by the Kalman filter, shortcomings that random drifting errors of a flexible gyroscope are only calibrated, tested and assessed by a multi-position method in a laboratory at present are overcome, and an auxiliary analysis means and an assessment basis for dynamic precision analysis of the flexible gyroscope and the flexible inertia unit are provided.

The invention discloses an unstructured pavement type identification method based on multi-source sensor information fusion. The method comprises the following steps: step 1, establishing a multi-source sensor synchronous data acquisition platform; step 2, achieving space-time alignment of the pavement image data and the vehicle dynamics state data; 3, preprocessing the acquired image information;4, estimating the rolling resistance, the adhesion coefficient and the gradient parameter of the corresponding unstructured pavement; 5, obtaining another road surface type identification result, wherein the classifier is recorded as a second classifier; and step 6, fusing the road surface type results of the first classifier and the second classifier to obtain a final road surface type identification result. The method has the advantages that part of classification errors generated by only using single sensor information are corrected; road surface type identification is achieved; accordingto the spatial alignment mode of the road surface image data and the vehicle dynamics state data, errors are effectively reduced, and the spatial alignment precision is guaranteed.

The invention discloses a vehicle used power cell box, including a container-type box body, a faceplate and a plurality of cell packages. The cell packages are arranged inside the box, and the faceplate is arranged at the front end of the box body, a fan is installed at the rear of the faceplate, a proper angle exists between the installation plan of the fan and the faceplate. The invention uses a container-type cell, 5 can be arranged on each side of a bus, with 2 on the front and 3 on the rear, not only making the volume more convenient for loading and unloading than the prior card cell group, but also easily being made into the standard cell, and variable number of cells are arranged according to the vehicle loading and volume. Besides, the fan is installed inside a cell box, the operating temperature of the cell can be reduced via the circulation of air to keep the normal working state of the cell for a longer time.

One example dynamic display system includes: (a) a vehicle including steering, an accelerator, brakes, sensors recording sensor data, a display, a processor, and memory; (b) a display program operatively coupled to the processor and configured to: determine a user hindrance rating based on the sensor data, and select instructions from a pool of instructions based on the hindrance rating and a user-selectable fidelity level, the pool of instructions including visual cues, and audio cues.

A method and an arrangement are suggested for limiting the speed of a vehicle to a limit speed with the arrangement not needing an integral component and nonetheless being precise at steady state. A maximum permissible acceleration proportional to the difference between an actual speed and the limit speed is determined. From the maximum permissible acceleration, a limit value for an output quantity of a drive unit of the vehicle is determined by means of a vehicular dynamic operation equation in dependence upon the running resistance. The magnitude of the limit value for limiting the speed of the vehicle to the limit speed may not be exceeded.

A map-information obstacle-tracking system and a method thereof are provided. The system is installed in a vehicle. The method includes: using a vehicular dynamic positioning module to acquire a position of a vehicle, and using a map-information module to acquire map-information routes of an area neighboring the position of the vehicle; comparing position of the vehicle with the map-information routes to find out candidate routes in the moving direction of the vehicle; determining one of the candidate routes where said obstacle appears, and predicting a moving trajectory of the obstacle; estimating and outputting a position of the obstacle. The present invention is characterized in using map-information and able to acquire the curvature and slope of the front curved lane. Therefore, the present invention can improve the precision of the obstacle position and stabilizes the accuracy of detecting an obstacle in a curved lane.

The invention discloses a double-level rigidity elastic body combined device which comprises at least one low-rigidity elastic element and a high-rigidity elastic element. The low-rigidity elastic elements are arranged in an elastic body pre-compression device, and the low-rigidity elastic elements and the high-rigidity elastic element are arranged in a serial connection manner under the effect of a pre-compression load F1. The double-level rigidity elastic body combined device has the advantages that the double-level rigidity elastic body combined device has such combined rigidity that the device is hard at first and then is flexible; the double-level rigidity elastic body combined device is high in compression rigidity when the double-level rigidity elastic body combined device is used as an elastic suspension device of an axle box of a railway vehicle and deformation displacement is extremely small, and the compression rigidity of the device starts to be deteriorated when the deformation displacement reaches a set numerical value, so that the conflict problem that requirements on the straight and snaking critical speed of an existing vehicle and the curve line negotiating capacity of the existing vehicle cannot be simultaneously met can be effectively solved; the device further can be applied to various places among relevant components of railway vehicles, the service places have requirements on the combined rigidity of elastic body damping devices, and the elastic body damping devices with the combined rigidity are required to be hard at first and then flexible, so that impact of the vehicles on wheel tracks can be buffered, the dynamic performance of the vehicles can be enhanced, the running safety of the vehicles can be guaranteed, and the operation quality of the railway vehicles can be greatly improved.

A monitoring method based on vehicular dynamic logistics information comprises the following processing steps: 1) a small dynamic wireless local area network is built inside a wagon of a truck, the 'in' and 'out' two-way switch of each RF freight node in the network can be realized in the wireless local area network; 2) a vehicular GPS module sends the location information of the current vehicle to a major control node, the major control node investigates a task electronic chart for delivering or forwarding freights in a database according to GPS information and outputs the task electronic chart to a display terminal; 3) in loading and unloading process, the switching information of the RF freight nodes is sent to the major control node through the wireless local area network to realize real-time register; 4) after completing the loading and unloading of freights, the major control node counts the switching information of each subnode and sends an information prompting showing that whether the loading and unloading task is successful to a display output terminal according to that whether the switching information is consistent with the task electronic chart and if an error is generated, the major control node can submit a specific information report for the misoperation packing box, so that the delivering and forwarding of freights can be completed by the method of the invention.

The invention relates to a desert plant vehicle dynamic synchronous trench digging spraying machine, wherein the vehicle support has water tank whose bottom is connected to a spray tube control system; said spray tube control system comprises power pressurize device and spray pressure adjuster connected via water tube; the spray pressure adjuster comprises an electromagnetic valve fixed inside the tube and spray tube; the spray tube is fixed at the back of vehicle via tube clamper; the power pressurize device comprises a servo motor connected to the water pump via belt; the water inlet of water pump via soft tube is connected to the water tank; the water outlet via water tube and flange disc is connected to the electromagnetic valve, spray tube and ejector. The invention can synchronously dig trench and spray, while it can plant at desert.

The invention discloses a vehicle used power cell box, including a container-type box body, a faceplate and a plurality of cell packages. The cell packages are arranged inside the box, and the faceplate is arranged at the front end of the box body, a fan is installed at the rear of the faceplate, a proper angle exists between the installation plan of the fan and the faceplate. The invention uses a container-type cell, 5 can be arranged on each side of a bus, with 2 on the front and 3 on the rear, not only making the volume more convenient for loading and unloading than the prior card cell group, but also easily being made into the standard cell, and variable number of cells are arranged according to the vehicle loading and volume. Besides, the fan is installed inside a cell box, the operating temperature of the cell can be reduced via the circulation of air to keep the normal working state of the cell for a longer time.

The invention relates to a desert plant vehicle dynamic synchronous seeding machine, wherein the side surface of sub seat has several seeding devices; said seeding device comprises a seeding roller whose upper open is connected to the bottom of hopper and lower open is connected to the seed tube; the bearing at two ends of roller has a roller axle inside with a waisted groove; the roller axles are connected integrated via connecting axle, to be fixed at one end of transmission axle via universal coupler; another end of transmission axle via bearing base is connected to the hub center of transmission chain wheel. The invention can synchronously seed dynamically, to seed at wide range and several rows synchronously in desert.