1696 results about "Speed control system" patented technology

A lane changing assistant for motor vehicles, having a speed control system and a surroundings sensor system for recording the traffic environment including the traffic in an adjacent lane, having a decision device for deciding whether a lane changing request of the driver is to be accepted, and having a command device for issuing an acceleration command to the speed control system in the case of a lane changing request, wherein a recognition device is developed to recognize a window for swinging into the adjacent lane without danger, in the light of the data of the surroundings sensor system; and the command device is developed to compute an acceleration strategy adjusted to the window, including a point in time for the beginning of the acceleration.

In a vehicle speed control system, a preset offset distance is taken as a zero value of an inter-vehicle distance in a brake discriminant. When the current value of a corrected distance condition evaluation index is higher than the brake discriminant, a value on the brake discriminant is set as a target value of the corrected distance condition evaluation index. Deceleration control is started to decelerate the subject vehicle so that the deceleration of the subject vehicle becomes equal to the target deceleration of the subject vehicle computed based on the target relative speed corresponding to the set target value and the actual relative speed.

A communication system for a vehicle comprises a receiver to receive a signal corresponding to a traveling speed of a lead vehicle, a response device that generates an alert to warn of a change in the traveling speed of the lead vehicle, and a control device coupled to the receiver and the response device, wherein the receiver sends a signal to the control device corresponding to the traveling speed of the lead vehicle and the control device operates the response device in a manner dependent on the traveling speed of the lead vehicle. In some embodiments, the signal comprises one or more of infrared, radio frequency, wireless, WiFi, and Bluetooth®. In some embodiments, the communication system further comprises a speed control system coupled to the control device, wherein the control device operates the speed control system in a manner dependent on the traveling speed of the lead vehicle.

The invention is intended to provide a downhill speed control system which employs a method of setting a target vehicle speed in advance, thereby improving controllability when a vehicle runs down a slope, and giving an operator improved operability in setting of the target vehicle speed. Brakes are controlled so that, when the vehicle runs down the slope, an actual vehicle speed is matched with a target speed set by a switch which can set the target speed by selectively or continuously changing plural preset speeds. Also, control constants for PID control are modified depending on settings of a downslope gradient setting switch and a load setting switch. When an acceleration computed from the actual vehicle speed is larger than a target acceleration, the strength of applied brake is increased.

A system and method for detecting a road curve as a vehicle approaches the curve, automatically providing road curvature information and controlling vehicle speed. The system uses a locating device and a map database to know the vehicle's position. Depending on the speed of the vehicle, the system generates a curvature profile for different curvature data points at or around the curve in front of the vehicle. The system then generates a desired speed profile for the curvature points. The desired speed profile and the actual vehicle speed are compared to determine whether the vehicle is traveling too fast for the target speed at each profile point. The acceleration computation can be enhanced by providing a driver cornering mode input that the vehicle operator can select based on how aggressively the driver wants the system to act to slow down the vehicle.

A method for operating an automatic speed control system of an automotive vehicle. Initially, in a normal follow mode, a setpoint distance between the vehicle and a preceding vehicle is set to a first value d₁, and a setpoint vehicle acceleration is into a first value a₁. Upon detection of an intention of the vehicle driver to overtake the preceding vehicle (such as switching on a turn indicator), the setpoint distance is reset to a second value d₂ that is smaller than d₁. The setpoint acceleration may be reset to a second value a₂ greater than a₁ simultaneously, or the second value a₂ may be set upon detection of initiation of a lane change into an overtaking lane (such as turning a steering wheel). The method assists the driver during the execution of an overtaking process, and a safer, more comfortable and free-flowing sequence of the overtaking process is ensured.

A vehicle speed control system for a vehicle having a plurality of wheels, the vehicle speed control system comprising one or more electronic control units configured to carry out a method that includes applying torque to at least one of the plurality of wheels, detecting a slip event between any one or more of the wheels and the ground over which the vehicle is travelling when the vehicle is in motion and providing a slip detection output signal in the event thereof. The method carried out by the one or more electronic control units further includes receiving a user input of a target speed at which the vehicle is intended to travel and maintaining the vehicle at the target speed independently of the slip detection output signal by adjusting the amount of torque applied to the at least one of the plurality of wheels.

A fan speed control system (200) for an electronic equipment enclosure comprises means for determining temperature (201, 202, 203, 210, 211) at a plurality of locations within the enclosure, means for determining operating parameters (201, 202, 203, 212) for the fan control system, means for setting operating speed (201) of at least one cooling fan, and means for exchanging information signals (205, 217, 218) relating to fan speed control system operation with an external controller. A method is also provided for controlling fan speed for an electronic equipment enclosure comprising the steps of determining temperature at a plurality of locations within the enclosure, determining operating parameters for the fan control system, setting operating speed of at least one cooling fan, and exchanging information signals relating to fan speed control system operation with an external controller.

The invention provides a method for injecting a harmonic voltage to restrain a harmonic current of a PMSM (permanent magnet synchronous motor), which is characterized in that a ring to restrain the harmonic current is added to realize the closed-loop control for the harmonic current on the basis of extracting harmonic current components in the PMSM in real time, thus calculating to obtain harmonic voltage components which are required to be injected to restrain 5-order and 7-order harmonic currents of the PMSM; and then the obtained harmonic voltage components are injected into a three-phase control voltage in a speed control system of the PMSM so as to offset the 5-order and 7-order harmonic components in a motor current when the PMSM runs, thereby reaching the purpose of restraining the 5-order and 7-order harmonic currents. The method is used to solve the technical difficulty that current ZCP (zero crossing point) is required to detect accurately in a traditional mode to restrain the harmonic current, remarkably improves the current waveform of the motor, effectively restrains the 5-order and 7-order harmonic currents caused by the nonlinear characteristics of an inverter and the air-gap field distortion of the motor, effectively reduces the additional loss caused by the 5-order and 7-order harmonic current components, reduces the electromagnetic torque and the revolving speed pulse of the PMSM and improves the running efficiency and the running reliability of the PMSM.

A vehicle curve speed control system (10) adapted for use with a vehicle (12) having an operator (14), includes a map database (16) representing a current vehicle path, and a locator device (20) communicatively coupled to the database (16) and configured to determine the location of the vehicle (12) on the path. The system (10) further includes a controller (36) configured to identify approaching curve points of a curve (18a) in terms of curvature or radius, and determine a desired speed profile based on operator preference and/or vehicle characteristic input. An acceleration profile is determined, based on the current vehicle speed, and desired speed profile. An acceleration/deceleration command at the present control loop is modified towards achieving an optimal curve speed, and is delivered to either a brake or acceleration module (40,42) to automatically accelerate or decelerate the vehicle (12) accordingly.

A vehicle speed control system includes: a unit for computing a first target velocity based on map information; a unit for computing a second target velocity based on a road profile obtained from other information than the map information (such as lane recognition using a camera); a unit for comparing the first target velocity and the second target velocity; a unit for selecting a lower target velocity therefrom; and a unit for controlling a vehicle velocity in accordance with the selected target velocity.

The invention provides a mobile robot formation control method based on leader-follow. The method is formed by a global positioning system, a wireless communication system, an algorithm processing system, and a speed control system. The global positioning system obtains the pose information of each robot and sends the pose information to an arithmetic processing system through a wireless communication system, and the formation motion control is finally realized through the information interaction with the speed control system. In a control algorithm, firstly a leader-follow formation motion model is established, a follow robot motion control rate is given, then a follow robot trajectory prediction model is established, a nonlinear least squares method prediction model is employed, a prediction model parameter is optimized by using an improved particle swarm algorithm, a communication data abnormal range is defined, and a prediction point is started to substitute an abnormal point so as to ensure formation motion. According to the method, the prediction model is introduced, the formation order deviation phenomenon caused by temporary communication abnormality, the reliability of follow robot motion is ensured, and the stability of the formation is greatly improved.

A speed control system for a utility vehicle, the vehicle having a forward-facing driving position and a rearward-facing seat, includes a creep control system for moving the utility vehicle, controlled from the rearward-facing seat. The vehicle includes a speed-controllable transmission operable to output power to drive a wheel. The vehicle includes a creep speed control actuator located adjacent to the rearward-facing seat and a creep speed control system operatively connected to the actuator and to the transmission. The system converts movement of the actuator to speed change of the transmission. The transmission can be a mechanically or electronically controlled hydrostatic transmission, or an electronically controlled reverser transmission.

In a broad respect, vehicles that are capable of making a low- to zero-radius turn using the independent rotation of drive wheels and by turning the non-driving steerable structure or structures (such as wheels) with a steering input device (in some embodiments, the driving wheels also may be capable of being turned). This may be accomplished using a steering system, a speed control system and an integration device (together, a control system) that are configured to work together to provide correct steering in forward and reverse, and, in some embodiments, to reduce the speed of the outboard drive wheel of the vehicle when it enters an extreme turn under constant speed input. Different systems configured for use in such vehicles are included.

An agent injection device is provided that is capable of injecting an agent to a known predetermined tissue depth. An injection member has an elongate injection shaft with an outlet port configured to dispense an agent at a controllable time. A controllable driver is coupled to the elongate injection shaft and is configured to drive the injection member into target tissue. A velocity control system is in communication with the controllable driver and is configured to control the velocity of the elongate injection shaft.

An engine control system includes a mode selection module that is configured to select an operating mode from one of an open loop control mode, a torque control mode, and a speed control mode based on an engine speed and a driver input. An axle torque arbitration (ABA) module generates ABA predicted and immediate torque requests based on the driver input. A speed control (SC) module generates a first set of SC predicted and immediate torque requests based on engine speed. A propulsion torque arbitration (PTA) module generates PTA predicted and immediate torque requests based on one of the ABA predicted and immediate torque requests and the first set of SC predicted and immediate torque requests based on the operating mode. A torque output control module controls output torque of an engine based on the PTA predicted and immediate torque requests.

A method for determining an operating threshold boundary within which a controller is permitted to control a powered system, the method including calculating a threshold boundary with at least one of information about at least one of a route and a load encountered by the powered system as a function of at least one of time or distance, a characteristic of the powered system, and a characteristics of the controller, and determining whether the powered system exceeds the threshold boundary.

The invention relates to an unmanned intelligent patrol electric vehicle and a patrol system. The unmanned intelligent patrol electric vehicle comprises 1-N small electric cars, of which each is equipped with an electric vehicle speed control system supporting double-mode free switching, a vehicle body main control device and vehicle body additional equipment. The patrol system comprises a monitoring center. By loading each small electric car with the electric vehicle speed control system supporting double-mode free switching, the vehicle body main control device and the vehicle body additional equipment, switching between a manual mode and an automatic mode can be controlled without large-scale renovation of the original vehicle motor and the control method. Drivers can drive the small electric cars to go on patrol under the mode of 'manual ordinary driving', and the cars can run automatically to go on patrol based on real-time positioning information and a predetermined route provided by differential navigation under the mode of 'unmanned automatic driving'. Patrol video images can be transmitted in real time to the monitoring center through video acquisition and real-time wireless transmission equipment mounted on the cars.

The invention discloses a DSP-based brushless DC motor control device, comprising: a position sensor, installed on the stator of the brushless DC motor, used to detect the position information of the rotor of the motor during operation, and send the position information to the DSP control device; DSP controller, used to obtain the real-time speed of the motor according to the adjacent position information sent by the position sensor and the time to obtain the adjacent position information; and compare the real-time speed with the preset target speed, and according to the comparison result Send control signals to the drive and inverter circuit; the drive and inverter circuit is used to control the speed and direction of rotation of the motor according to the control signal of the DSP controller. The DSP-based brushless DC motor control device of the present invention utilizes the high-performance data processing capability and rich peripheral interfaces of the DSP controller to realize a set of DSP-based rotational speed closed-loop control system suitable for the brushless DC motor. The device has good anti-interference performance and the system works stably.

Methods and a system for a vehicle control system using a reference time profile including an upper control bound and a lower control bound are provided. The system includes an input device configured to receive a required time of arrival at a waypoint and a processor communicatively coupled to said input device wherein the processor is programmed to generate a reference time profile using a first speed profile up to an intermediate control point and a second speed profile between the intermediate control point and an RTA waypoint. The system also includes an output device communicatively coupled to the processor wherein the output device is configured to transmit a speed control signal based on the reference time profile to a vehicle speed control system.