534 results about "Acceleration control" patented technology

A UAV recovery system including a recovery cart; a guide mechanism for defining the path of the cart; a base station for capturing a UAV tailhook; a momentum transfer system driven by the inertia of the UAV through the arresting member to move the recovery cart along the guide mechanism away from the base station in the same direction as the UAV; an acceleration control device for converging the speeds and positions of the UAV and cart for enabling engagement of the cart and UAV as their relative speeds approach zero; and a brake system for stopping the recovery cart when the cart and UAV are engaged. Also disclosed is a UAV having a tailhook pivotably mounted on the UAV at the center of gravity of the UAV.

An acceleration control system is provided which allows the operator of a marine vessel to select an acceleration profile to control the engine speed of a marine vessel from an initial starting speed to a final desired speed. When used in conjunction with tow sports, such as wake boarding and water skiing, the use of acceleration profile provides consistent performance during the period of time when a water skier is accelerated from a stationary position to a full speed condition.

A system and method for controlling torque in a hybrid electric vehicle. The system provides a regenerative braking torque with an electrical machine when a level of braking torque indicated by actuation of a brake control device exceeds a level of traction torque indicated by actuation of an acceleration control device. The regenerative braking torque is supplemented by a friction braking system when the braking torque requested by a vehicle operator exceeds a maximum regenerative braking capacity of the electrical machine.

A focus jump moves a focus position of a light beam in a direction perpendicular to the storage medium to the focus position corresponding to a target recording layer so that the light beam is irradiated on the target recording layer. The device includes: a focus position moving unit for moving the focus position of the light beam; a focus error signal detector for detecting a focus error signal based on a variation of a returning light from the storage medium; a feedforward controller for supplying a drive signal to the focus position moving unit to move the focus position of the light beam in an acceleration state in an acceleration control and to move the focus position of the light beam in a deceleration state in a deceleration control; and a position controller for comparing the focus error signal, detected the time of movement of the focus position of the light beam to the target recording layer, with a predetermined target value to generate an error, and for feeding back the drive signal to the focus position moving-unit to reduce the error thereby to control the focus position of the light beam.

A computer-implemented method for controlling a host vehicle having a vehicle control system that controls motion of the host vehicle relative to a preceding vehicle that is immediately ahead of the host vehicle. The method includes determining a relative headway distance and a relative velocity between the host vehicle and the preceding vehicle, and an acceleration rate of the preceding vehicle. The method includes receiving message packets transmitted from a leading vehicle and the message packets contain parameters of the leading vehicle including an acceleration rate of the leading vehicle. Further, the method includes calculating an acceleration control rate for the host vehicle to maintain the headway reference distance between the host vehicle and the preceding vehicle, based on the relative headway distance, the relative velocity, the acceleration rate of the preceding vehicle, and the acceleration rate of the leading vehicle. The acceleration rate is output to a vehicle controller to control motion of the host vehicle.

The present invention is directed to an apparatus and method for a welding-type wire feeder. The feeder includes at least one electronically commutated motor (ECM) configured to deliver a consumable for a welding-type process. The feeder includes a controller configured to electronically commutate the at least one ECM so as to precisely perform push and pull functions, speed and acceleration control, and wire reversal.

A method is provided for automatically controlling a first vehicle (follower vehicle) that is to follow a second vehicle (leader vehicle) in a desired manner with respect to movement of the second vehicle. In the follower vehicle, bearing and acceleration control inputs are generated based on data representing bearing and acceleration control inputs made at the leader vehicle and a position of the follower vehicle relative to the leader vehicle so as to mimic in the follower vehicle the bearing and acceleration control inputs made in the leader vehicle. Adjustments may be made to the control inputs applied in the follower vehicle based on deviation between the velocity of the follower vehicle and velocity of the leader velocity, and on deviation between estimated (actual) follow distance and lateral offset and target follow distance and lateral offset between the follower vehicle and the leader vehicle.

A control system for a vehicle having a loader arm, such as a skid steer loader, telescopic handler, wheel loader, backhoe loader or forklift, reads a load height sensor, a load weight sensor; dynamically calculates the static center of gravity of the combined vehicle and load; calculates the acceleration necessary to cause the dynamic center of gravity of the combined vehicle and load to extend exterior of the vehicle's stability polygon; and limits the acceleration of the vehicle to less than the acceleration necessary to cause the dynamic center of gravity of the combined vehicle and load to extend exterior of the vehicle's stability polygon.

A device for handling a fluid includes a corona discharge device and an electric power supply. The corona discharge device includes at least one corona discharge electrode and at least one collector electrode positioned proximate each other so as to provide a total inter-electrode capacitance within a predetermined range. The electric power supply is connected to supply an electric power signal to said corona discharge and collector electrodes so as to cause a corona current to flow between the corona discharge and collector electrodes. An amplitude of an alternating component of the voltage of the electric power signal generated is no greater than one-tenth that of an amplitude of a constant component of the voltage of the electric power signal. The alternating component of the voltage is of such amplitude and frequency that a ratio of an amplitude of the alternating component of the highest harmonic of the voltage divided by an amplitude of the constant component of said voltage being considerably less than that of a ratio of an amplitude of the highest harmonic of the alternating component of the corona current divided by an amplitude of the constant component of the corona current, i.e., (Vac / Vdc)≦(Iac / Idc).

The invention discloses a dynamic identification system for automobile quality and the mass center position. Each automobile wheel is provided with a corresponding air spring, an airbag of the air spring is provided with an air pressure sensor which is used for measuring the pressure, an automobile speed sensor, an automobile body position sensor and an acceleration sensor are arranged nearby the mass center of an automobile body, an automobile door is provided with an automobile door opening / closing sensor, the air pressure sensor, the automobile speed sensor, the automobile body position sensor, the acceleration sensor and the automobile door opening / closing sensor are connected with a data processing unit through a data transmission device, and thus real-time quality of an automobile and the dynamic position of the mass center can be measured. The dynamic identification system for the automobile quality and the mass center position, disclosed by the invention, has the advantages that dynamic parameters can be provided for automobile control, and thus active control effects such as anti-roll control, braking control and starting acceleration control of an automobile can be obviously increased.

The invention discloses a UAV cluster control method, relating to the technical field of UAVs. The method includes the following steps of constructing a UAV cluster internal member model based on the spatial position, velocity and acceleration of UAV cluster internal members; constructing the acceleration control functions of the UAV cluster internal members; and controlling the cluster movement, oriented target movement, and the obstacle avoidance movement of the UAV cluster internal members through the constructed acceleration control functions. The method is high in flexibility in cluster movement control, good in consistency, and substantial in control and obstacle avoidance effect.

A control system for a machine having a power source, a traction device, and a ripping tool is disclosed. The control system may have a slip sensor configured to generate at least one signal indicative of machine slippage, and at least one actuator operable to position the ripping tool. The control system may also have a controller in communication with the slip sensor, the at least one actuator, and the power source. The controller may be configured to receive at least one operator input indicative of an acceptable slip value, and determine actual machine slippage based on the at least one signal. The controller may also be configured to directly and separately regulate a speed of the machine and a position of the ripping tool during an excavation process based on the acceptable slip value and actual machine slippage.

Disclosed is a high-frequency discharge plasma generation-based two-stage Hall-effect plasma accelerator, which comprises an annular acceleration channel having a gas inlet port, a high-frequency wave supply section, an anode, a cathode, a neutralizing electron generation portion and a magnetic-field generation means, wherein: gas introduced from the gas inlet port into the annular acceleration channel is ionized by a high-frequency wave supplied from the high-frequency wave supply section, to generate plasma; a positive ion includes in the generated plasma is accelerated by an acceleration voltage applied between the anode and cathode, and ejected outside; and an electron included in the generated plasma is restricted in its movement in the axial direction of the annular acceleration channel by an interaction with a magnetic field. The two-stage Hall-effect plasma accelerator is designed to control a degree of ion acceleration in accordance with the acceleration voltage serving as an acceleration control parameter, and control an amount of plasma generation in accordance with the high-frequency wave output serving as a plasma-generation control parameter. The two-stage Hall-effect plasma accelerator of the present invention can control the ion acceleration and the plasma generation in a highly independent manner.

The invention relates to a control system and a control method for actively avoiding side collision of an automobile. The control system comprises a side collision avoidance control unit, and an engine management system, an electronic stable control system, a radar system, a steering wheel rotation angle sensor, a wheel velocity sensor, a transverse swinging angular velocity sensor, a safety belt detection unit, a safety belt pre-tightening control unit, a side air curtain control unit and a safety air bag control unit which are connected with the side collision avoidance control unit. The time for a vehicle on a transverse lane to pass through a crossroad is calculated by the side collision avoidance control unit according to data provided by the radar system; the time for the vehicle to pass through the crossroad is calculated according to data provided by each sensor; analysis and judgment are made; a corresponding instruction is transmitted to an executing mechanism according to a preset program; deceleration and acceleration control is performed on the vehicle; and thus, the collision of the vehicle and a vehicle on the transverse lane is avoided to the greatest extent and the damage caused by the collision is reduced.

In a cruise assist ECU, when a vehicle drive state is changed from a running state to a state immediately before vehicle stop or from a stop state to a state immediately after vehicle start, a feedback torque gain compensation part changes a feedback torque gain to a second set value, and maintain it during the state immediately before vehicle stop or the state immediately after vehicle start. Because the second set value is smaller than a first set value, a response delay is increased in feedback control of the feedback torque control part when the first set value of the feedback torque gain is switched to the second set value. This makes it possible to slowly change the FB control value during the transition state in elapse of time, and prevent a brake or damping torque generated in the vehicle from being excessively changed in FB control.

The invention discloses an early warning method of a cell phone platform for car driving fatigue, which can quickly popularize the early warning for car driving fatigue and greatly improve the safety factor of car driving. The software is realized by mainly using the existing hardware of the existing smart phone through the following steps: 1. the steering wheel is monitored by combining the image recognition technology and audio analysis technology; 2. the car driving status is analyzed and the collision event is recognized by combining the audio analysis technology and acceleration control; and 3. the fatigue driving early warning is realized through the software in case of long-time operation of the steering wheel or long-time driving to remind the driver to rest. After collision, the position information is obtained and the text message is sent for help or automatic call for help. The incoming call monitoring is carried out in driving, and automatic rejection or automatic answering in the outdoor mode can be set. The method maximizes the functional integration including the call for help function when accident happens and accelerates the rescue speed after the accident while ensuring the accuracy and stability of the fatigue driving early warning function.

The invention discloses a redundant manipulator repeated motion programming method based on the abrupt acceleration. The method includes the steps that firstly, a manipulator repeated motion scheme is analyzed on an abrupt acceleration layer through an upper computer by adopting quadratic optimization, and the minimum performance index is designed as repeated motion; secondly, the quadratic optimization in the first step is converted into standard quadratic programming; thirdly, the standard quadratic programming in the second step is solved through a quadratic programming solver; fourthly, a solution result in the third step is transmitted to a lower computer controller to drive a redundant manipulator to move. According to the method, by designing the redundant manipulator repeated motion programming performance index based on the abrupt acceleration, the redundant manipulator is controlled to conduct repeated motion on the abrupt acceleration layer, and meanwhile the redundant manipulator can complete given terminal tasks; for a redundant manipulator over which speed or acceleration control is inconvenient, a good control effect is achieved; furthermore, by considering various joint limits, physical damage caused when the manipulator operates beyond the limits can be effectively prevented.

The invention relates to a device for preventing selected users from driving a vehicle above a particular speed. The speed limit value can be programmed by the selected users by driving the vehicle at a desired speed limit and providing programming instruction. The device provides, from acceleration control signals received from the acceleration pedal, altered acceleration control signals. When in non speed limiting mode, the device simply forwards the acceleration control signals to the engine control unit or the electronic throttle controller. When in speed limiting mode, the device makes no change to the acceleration control signals if the vehicle speed is below the speed limit value and alters the acceleration control signals if the vehicle speed reaches the speed limit value, in order to limit the speed of the car.

The present invention provides an acceleration control apparatus, at the start of a freight vehicle mounting a dual clutch type transmission in an ordinary condition, a smooth start is accomplished with the second speed, but the transmission is quickly shifted to the first speed when the vehicle is to start moving on the way of uphill road. At the start of the freight vehicle, first, the two input shafts of the dual clutch type transmission are set to a state of being shifted to the first speed and to the second speed and in this state, the amount of connection of the friction clutch coupled to the gear train of the second speed is increased to execute the second-speed start. After the passage of a predetermined period of time, the accelerator opening degree and the vehicle speed are detected to judge the excess or insufficiency of the driving force. If the driving force is not insufficient, the start with the second speed is continued to quickly accelerate the vehicle. If the driving force is judged to be insufficient, the friction clutch coupled to the gear train of the first speed is readily connected. The transmission has been shifted already to the gear train of the first speed. Therefore, the transmission is shifted down in a short period of time avoiding unexpected occurrence such as moving back of the vehicle even on an uphill road vehicle.

A control system for a machine having a power source, a traction device, and a ripping tool is disclosed. The control system may have a slip sensor configured to generate at least one signal indicative of machine slippage, and at least one actuator operable to position the ripping tool. The control system may also have a controller in communication with the slip sensor, the at least one actuator, and the power source. The controller may be configured to receive at least one operator input indicative of an acceptable slip value, and determine actual machine slippage based on the at least one signal. The controller may also be configured to directly and separately regulate a speed of the machine and a position of the ripping tool during an excavation process based on the acceptable slip value and actual machine slippage.

The invention discloses a low-speed self-adaptive cruise control system and a low-speed self-adaptive cruise control method. The low-speed self-adaptive cruise control system comprises an ultrasonic radar set, a central control module connected with the ultrasonic radar set as well as an electronic power-assisted steering system, a vehicle body electronic stabilization system, an engine management system, an automatic gearbox control unit, a human-computer interface module and a gradient sensor which are connected with the central control module. The central control module plans a running route of a vehicle according to obstacle information and information on rotation angles of a steering wheel, and judges whether or not the vehicle needs to be subjected to acceleration control or deceleration control. If the acceleration control is needed, the target torque is calculated and transmitted to the engine management system, and then the engine management system responds to torque control and controls the vehicle to accelerate; and if the deceleration control is needed, a target deceleration rate is calculated and transmitted to the vehicle body electronic stabilization system, and then the vehicle body electronic stabilization system outputs corresponding brake master cylinder pressure and controls brake discs to brake and decelerate. According to the low-speed self-adaptive cruise control system and the low-speed self-adaptive cruise control method, the low-speed (the vehicle speed is smaller than 5km / h) self-adaptive cruise of the vehicle can be realized.

The invention discloses an on-vehicle turntable control system and a control method thereof. The on-vehicle turntable control system comprises a driving device, a locking device and a control device for controlling the driving device and the locking device. The driving device comprises an angle sensor, a D / A conversion chip, a motor driver and a driving motor. The locking device comprises a position sensor, an A / D acquisition chip, a stepping motor driver and a stepping motor. The control device comprises a digital signal processor. The control method comprises the steps of inputting an instruction to the digital signal processor, automatically unlocking the turntable, calculating an acceleration control curve and a deceleration control curve of the turntable, computing the voltage of the driving motor and driving the turntable according to the voltage, and automatically locking the turntable. The on-vehicle turntable control system has a greatly reduced turntable size and can be integrated with other equipment. Furthermore automatic locking and unlocking of the turntable at a random position can be realized. Furthermore stable operation and precise positioning of the turntable can be realized.

The present invention is designed to complement the existing transportation infrastructure in order to alleviate ever-worsening traffic congestion in problematic areas by minimizing the impact of driver “bunching” habits and / or external events that lead to congestion problems. Events alleviated by the present invention may happen at naturally occurring roadway infrastructures such as merges, lane shifts, and exits, and under conditions like rush hour, accidents, stand-stills, and HOV lane activation times. Further, vehicles allowing their speed and spacing to be controlled should have access to high-flow lanes. This invention will best and most safely be implemented at low speeds when congestion is most problematic and bunching habits prevent the dissipation of gridlock. In particular embodiments, the invention will regulate multiple vehicle accelerations (non-negative acceleration) once a low threshold speed has been reached through the transmission of signals to receivers in properly equipped vehicles. The exclusive non-negative acceleration control system simplifies the manufacturing, safety and redundancy necessary for implementing such a system and is commercially viable.

A system for controlling an acceleration of a vehicle, including a control pressure evaluator evaluating a pressure applied on an acceleration control and producing pressure data, at least one sensor producing drive data corresponding to driving conditions of the vehicle, a driver input analyzer characterizing a driver input based on the drive and pressure data and producing a corresponding driver input condition signal, a response evaluator determining a required response based on the driver input condition signal and producing a corresponding response signal, and a controller actuating at least one warning signal and / or reducing a power output of an engine of the vehicle based on the response signal.

A vehicle control system includes: an inter-vehicle distance control section configured to perform a follow-up control to a preceding vehicle by automatically accelerating or decelerating a host vehicle, or a constant speed running control section configured to perform a constant speed running to converge to a set speed; a brake operating state sensing device; and a control unit including; a deceleration control section configured to perform a deceleration in accordance with the brake operating state of the driver when the brake operating state sensing device senses the brake operation of the driver during the inter-vehicle distance control or the constant speed running control; and an acceleration control limit section configured to cancel a control in the acceleration direction which is performed by the inter-vehicle distance control or the constant speed control when the brake operating state sensing device senses an end of the brake operation of the driver.

The invention discloses a double arm coordination acceleration control method based on an impedance model under the rigidity condition. The method comprises the following steps that firstly, a robot controller collects information of a six-dimensional force sensor, filtering treatment is conducted on the collected information, then gravity compensation is conducted, and finally expected force deviation value data or expected torque value deviation value data are obtained; secondly, the force deviation value data or the torque value deviation value data are converted into the moving acceleration and the pivoting angular acceleration of a robot tail end in the Cartesian space; thirdly, a corresponding position function, a corresponding speed function, a corresponding acceleration function and a corresponding jerk function are obtained; fourthly, a joint angle function in the joint space is obtained according to the inverse kinematics; and fifthly, after isochronic synchronous interpolation of the joint space is conducted on the joint angle function, the joint angle function is sent to a servo driver through a bus of the controller, and then the action of a robot is controlled. By means of the double arm coordination acceleration control method, the real-time force tracking effect can be achieved, and the movement of the robot is smooth during following.

The invention relates to a method of longitudinal control of curve driving of an autonomous vehicle. The method includes: judging the stage of the vehicle in the curve according to the vehicle state and driving route information; according to the stage of the vehicle in the curve, performing online real-time control on the driving speed of the vehicle and transferring control results to an acceleration control module; when the vehicle is judged to be in the state of driving inside the curve, calculating the difference value of the current speed and a driver's comfortable speed under the current curvature and transferring the difference value as expected acceleration to a lower acceleration tracking module for real-time control; when the vehicle is judged to be in the state of driving into the curve or out of the curve, outputting the expected acceleration in real time according to a driver model obtained by training and transferring the expected acceleration to the lower acceleration tracking module for real-time control. Driving characteristics of the singular driver are fully considered, the driving characteristics of the driver driving in the curve can be effectively simulated by controlling the demonstrated control characteristics in real time, and driver's acceptance of an automatic driving technique is improved.

The invention discloses a humanoid robot uneven ground walking stability control method, and belongs to the technical field of robots. The method comprises four steps of maximum stability region based landing instep posture control, second-order spring damping impedance control, instep state estimation with forward kinematics calculation and instep inertial sensor measurement being combined and mass center acceleration control based on the supporting foot pressure center. The method disclosed by the invention uses landing compliance control, can effectively reduce impacts imposed on the instep by uneven ground, and enables the landing foot to have a large supporting region; and balance and stable control for the inclined instep enables the robot to realize stable walking of various supporting instep postures. Therefore, stable walking of a humanoid robot can be realized on the uneven ground, and the safety of the humanoid robot in the application process is effectively improved.