488 results about "Active steering" patented technology

A method for collision avoidance using automated braking and steering comprising: determining an actual distance to an obstacle in a path of a vehicle; determining a relative velocity between the obstacle and the vehicle; determining a first distance sufficient to avoid collision by braking only; determining a second distance sufficient to avoid collision by combined braking and steering around the obstacle. The method also includes: applying braking if at least one of, the first distance exceeds the actual distance and the first distance is within a selected threshold of the actual distance. If the actual distance exceeds the second distance and a lane change is permitted, steering control to affect a lane change is applied.

This invention takes the advantage of existing radar, vision and ultrasonic sensors available for side blind spot detection, rear view, rear virtual bumper, and rear parking assist. Using a sensor fusion technique to combine the useful information from these sensors, the trailer articulation angles as well as trailer track width and tongue length is accurately estimated. When an active steering system is present, vehicle and trailer can be controlled with increased stability by applying the trailer information.

A technique for use in marine seismic surveying includes a method and an apparatus. In one aspect, the method includes towing a seismic spread including a source multiple streamers on a generally curved advancing path, the streamers being actively steered. The source is fired and data is acquired on the curve. In other aspects, the method is performed with only a single vessel or the generally curved advancing path is a sincurve advancing path. The method may include a dual circular shoot in another aspect. And, in yet another aspect, the invention includes an apparatus comprised of a computing apparatus on board a tow vessel receiving positioning data from the marine seismic streamers. It is also programmed to: sail the tow vessel in a generally curved advancing path and actively steer the marine seismic streamers through the generally curved advancing path.

A system for controlling a vehicle. The vehicle has a steerable front axle and at least one further steerable axle. The system determining the path of a reference lead point at the front of the vehicle and determining the path of a follow point at the rear of the vehicle. A controller for driving the at least one further steerable axle of the vehicle such that the deviation between the path of the lead point of the vehicle and the follow point is within a predetermined range while the vehicle is in motion.

The invention discloses a hydraulic steering system for a front lifting crane. The hydraulic steering system is provided with a front shaft, a rear shaft and a steering device which is used for controlling the steering loop of a driving steering shaft, wherein both the front shaft and the rear shaft are both steering shafts, either the front shaft or the rear shaft serves as the driving steering shaft, and the other one serves as a driven steering shaft. The steering system further comprises a hydraulic valve and a controller, wherein the hydraulic valve is used for controlling the steering loop of the driven steering shaft, and the controller is used for outputting a control signal to the hydraulic valve according to a steering mode determined by user instructions, so as to adjust the flowing direction and flow rate of the steering loop of the driven steering shaft. Compared with the prior art, the steering system for the front lifting crane, disclosed by the invention, has the advantage that the requirements on two aspects, namely the performance of the steering system and the service lives of wheels, can be met effectively. Based on the steering system, the invention further provides the front lifting crane using the steering system.

The transportation system in this invention provides vehicle coupling units which allow the electrical connections and reconfigurations of two or more vehicles together at highway speeds. The coupling unit provides for the bidirectional exchange of electrical power between these vehicles to meet the various power demands of each vehicle. The system is designed to permit coupling and decoupling process of the vehicles while they are traveling at highway speeds. To facilitate the coupling event, each vehicle will employ vehicle active steering, vehicle active suspension, and coupler joint articulation, which will be under vehicle computer control, and will employ vehicle to vehicle data communication. This transportation system allows the electric vehicles to electrically and mechanically couple together for flexible electrical power sharing to achieve the extension of the range of electrically powered vehicles to minimize the time needed for stationary re-charging of electrical vehicles required by electrical charging stations.

The invention relates to a self-vehicle active avoidance system based on vehicle-vehicle communication. The self-vehicle active avoidance system comprises a receiving module, a self vehicle information collecting module, an information processing module, an action response module and a sending module, wherein the receiving module is used for receiving front vehicle running information sent by a front vehicle; the self vehicle information collecting module is used for collecting self vehicle running information; the information processing module is used for obtaining the current road information, and is used for judging whether the self vehicle and the front vehicle have a collision occurrence risk or not according to the front vehicle running information, the self vehicle running information and the current road information; when the condition that the self vehicle and the front vehicle have the collision occurrence risk is judged, a control signal for executing the risk avoidance action is output; the action response module is used for responding the control signal output by the information processing module, and controls the self vehicle to execut active warning, active braking or active steering; the sending module is used for sending the self vehicle running information to a back vehicle. The invention also provides a self-vehicle active avoidance system based on vehicle-vehicle communication. The system and the method have the advantage that the risk that vehicles running in the same direction generate rear-end collision and receive rear-end collision can be reduced.

The invention provides a wheel longitudinal force regulation-based vehicle handling stability control method; the control method is applied to a vehicle with a mechanical steering system and without an active steering function. The control method comprises the following steps: (1) according to a signal input by a driver and a vehicle speed state, calculating a vehicle reference motion state by a vehicle reference model; (2) according to a vehicle motion state measured by a vehicle-mounted sensor, estimating to acquire a non-measured vehicle motion state as a vehicle real motion state; (3) based on sliding mode variable structure control, acquiring a target control force and a target control moment which are needed for the vehicle real motion state to track the reference motion state; (4) by regulating longitudinal force of the wheels, generating the needed target control force and target control moment. According to the control method, by regulating the longitudinal force of the wheels, nonlinear combined control on vehicle speed, yaw velocity and side slip angle can be realized, and the vehicle handling stability is improved.

The invention discloses a combination control system for integration electric power steering and active steering. The combination control system for integration electric power steering and active steering comprises an active steering control system, an electric power steering control system, an adjustment control system based on yaw velocity and an adjustment control system based on steering wheel moment, the active steering control system and the electric power steering control system are respectively connected with a vehicle speed sensor and a steering wheel angle sensor for calculating and processing the inputted vehicle speed and steering wheel angle and outputting the total front wheel angle control signal to the total system for steering the front wheel actively; the adjustment control system based on yaw velocity is used for adjusting the obtained yaw velocity value for having feedback to the active steering control system for amending the front wheel angle control signal; the adjustment control system based on steering wheel moment is used for adjusting the obtained steering wheel moment for having feedback to the electric power steering control system for amending the outputted front wheel angle control signal.

A two-port air pump speaker that includes at least two active, phase-modulated, bi-directional shutters and an ultrasonic pumping chamber having at least two ports; a first port facing towards the listener, the forward port, and a second port facing another direction, the backward port which may be behind an acoustic baffle or inside a speaker enclosure. A two-port speaker with two active steering shutters can create continuous bi-directional airflow which leads to low distortion reproduction of low audio frequencies. The same improved design can be used also for other applications where acoustic modulation is required, especially in ultrasonic frequencies.

The invention relates to a control device for an automotive active steering system. The device comprises an AFS target rotating angle determining module, an assisted displacement motor adjusting module, an EPS target torque determining module, an assisted motor adjusting module and a coordination control module, wherein the AFS target rotating angle determining module is combined with the coordination control module to provide a target rotating angle value for the assisted displacement motor adjusting module; the EPS target torque determining module provides a target torque value for the assisted motor adjusting module; the coordination control module is communicated with an EPS control unit through a CAN bus; the AFS target rotating angle determining module comprises a target transmission ratio setting sub module, a target rotating angle calculating sub module and an expected heading angle speed calculating sub module, wherein the target transmission ratio setting sub module calculates a transmission ratio R according to the automotive speed u and an ideal angle transmission ratio curve; and the target rotating angle calculating sub module calculates a target rotating angle value theta m4d according to the rotating angle theta S of a steering wheel and the transmission ratio R.

A seismic survey system includes a winch having a winch cable coupleable to a source array towable between two deflected lead-ins, a positioning system for determining a current position of the source array and a controller for adjusting the winch to modify the current position of the source array to a desired crossline position. The winches may be attached to the deflected lead-ins or mounted on a tow vessel. The winches exert lateral forces on the source array, derived from the deflected lead-ins, to control the inline position of the source array. A method includes positioning a seismic source array in tow behind a vessel comprises determining a current position of the source array and adjusting a lateral force applied to the source array to move the source array to a desired crossline position. Optionally, by adjusting the gun cable winch, the inline position may be controlled.