1005 results about "Velocity controller" patented technology

A surgical instrument includes a drive shaft, a motor for rotating the drive shaft, and a motor speed control. The motor speed control includes a first switch and a second switch which are in communication with the motor. The first switch is disposed over and in registration with the second switch. The first switch has an activated state such that the first switch sends a first signal to the motor. The motor rotates the drive shaft in response to the first signal. The second switch sends a second signal to the motor that varies the speed that the motor rotates the drive shaft in response to a force applied to the second switch by the first switch.

The invention discloses a trajectory tracking control method used for an automatic driving robot of a vehicle, which relates to electronic control technologies of vehicles. The desired trajectory of a vehicle is described in a data point mode to obtain the current position information of the vehicle; humanoid driving is carried out according to the current driving direction at the current vehicle position to preview a distance ahead; the position obtained by previewing is compared with the desired trajectory to determine the lateral position deviation, the angle deviation and the vehicle speed deviation of the coordinate position obtained by previewing relative to the desired trajectory; then, the vehicle direction is jointly controlled by a trajectory tracking and speed controller according to position deviation and direction deviation; and according to vehicle speed deviation, the control quantities of an accelerator pedal and a brake pedal are determined with a fuzzy control method. The trajectory tracking control method is suitable for controlling the trajectory tracking of any trajectory, various vehicle types and various working conditions, and an automatic driving robot performs the control. The trajectory tracking control method has high precision and good repeatability and has an important meaning for guaranteeing the quality of vehicle reliability experiments and improving experiment safety.

In a speech communications network, continuous play of audio packets is achieved using a jitter buffer in a receiver. Audio packets are stored in the jitter buffer before decoding the audio packets into an audible output. When the level of stored audio packets approaches the full capacity of the jitter buffer, the rate at which the audio packets are played out of the jitter buffer is increased signaling a compression operation in the decoder. When the level of stored audio packets approaches an empty level of the jitter buffer, the rate which the audio packets are played out of the jitter buffer is reduced signaling an expansion operation in the decoder. Audio packets are not modified when the level of stored audio packets is within a predetermined range. A speed controller is provided to instruct the decoder to decode the audio packets according to either a compressed, expanded or normal audio packet status.

A remotely controlled flying apparatus (200) utilized for crop-spraying and crop monitoring purposes is disclosed. The present indention comprises a microcontroller (110) electronically coupled to an inertia measuring means (120). A controller (140) is connected to a computer (130) to allow a user to control movements of the flying apparatus (200). The computer (130) interprets control motions of the controller (140) and translates the motions to control signals. Upon translation, control signals are sent to the microcontroller (110) wirelessly and the control signals are modulated by a pulse modulation generator (150) before they are sent to a plurality of speed controllers (160a-160d) which are coupled to a plurality of motors (170a-! 70d). The controller (140) allows the user to control the motions of the flying apparatus remote! }, by changing respective rotational speeds of the plurality of motors (170a-170d). The controller (140) also allows the user to wirelessly control a pump (180) or a camera (190) or both through the computer (130) for spraying a pesticide or fertilizer fluid—when necessary or for crop monitoring purposes.

The speed of a fan motor is controlled by varying a DC voltage to the fan motor. A series pass transistor is used to vary the DC voltage to the fan motor. A power management controller sets the fan motor speed by outputting pulses to a pulse-to-DC voltage converter that changes the pulses to a proportional DC control voltage for controlling the series pass transistor. A tachometer output amplifier circuit is used to remove DC components and amplify to useful logic levels a low level tachometer output signal from the fan motor. The amplified tachometer signal is used by the power management controller in controlling the rotational speed of the fan motor.

A system (1) for transforming a variable output into an input having a desired speed value, including a transmission (30) receiving the output having a first speed (Ve) and producing the input having a second speed (Vgen), first, second and third sensors (12,10,7) producing data (39,32,37) corresponding to the first speed (Ve), second speed (Vgen) and a power demand (Pdem) for the input, a ratio set point controller (34), a ratio controller (36) and a speed controller (4). The ratio set point controller (34) receives the data (39,32,37) and calculates an available power (Pav), a stability level of the system (S,U1,U2), a desired value for the first speed (Ve), and a desired value and rate of change for the transmission ratio. The ratio controller (36) interfaces the ratio set point controller (34) and actuates the transmission (30) to change the transmission ratio to the desired value following the desired rate of change. The speed controller (4) changes the first speed (Ve) until the second speed (Vgen) corresponds to the desired speed value.

A model train control system providing a more realistic modeling of the movement, sound, smoke, and lighting effects of a model train is disclosed. A number of dynamic inputs are used to control such effects. Novel features include providing a dynamic variable speed compensator, a dynamic engine load calculator, automatic dynamic momentum, an adjustable train brake, spectrum control, a velocity controller, pressure sensitive effects, a voice activated dispatcher system, a train location and information reporter network, two digit addressing, a traffic control system, accessory control, a model train Central Control Module, and removable memory modules.

The invention pertains to the technical field permanent magnet motors, and relates to a permanent magnet motor sliding mode control strategy. The permanent magnet motor is controlled by adopting double-closed speed current. The permanent magnet motor sliding mode control strategy is characterized in that a sliding mode speed controller and an extended sliding mode observer are adopted in the control strategy, the sliding mode speed controller adopts an exponential approach law containing the speed error and the sliding mode surface information, the deviation between a given rotating speed and a feedback rotating speed is taken as the input quantity, and a q-axis current given value is outputted through the sliding mode control quantity; the extended sliding mode observer is used to estimate the rotor position, the rotating speed and the load torque on a real-time basis, the rotating speed and the rotor position are used to provide the information of speed closed-loop control and coordinate transformation, and the load torque is compensated to the sliding mode speed controller, so that the high-accuracy vector control of the permanent magnet motor can be realized. The control strategy of the invention can be used to make the system fast track a given speed in the dynamic state, reduce the speed overshoot and the current fluctuation, and improve the disturbance resistance performance of the system.

A impact power tool includes a motor rotating a drive shaft, an output shaft holding a tool bit, and a hammer coupled to the drive shaft. The hammer is rotatable together with the drive shaft and is engageable with an anvil fixed to the output shaft so as to give a rotary impact to the output shaft. The tool includes a speed commander generating a target speed intended by a user, and a speed detector for detection of a speed of the drive shaft. A speed controller generates a control signal for driving the motor by referring to the target speed and the detected speed. The speed controller provides a detection time frame, and to adopt a predefined pseudo-detection speed as a substitute for the detected speed when no speed detection is available within the detection time frame. Accordingly, even if no speed detection continues, i.e., the motor is stalled over the detection time frame, the speed controller can successfully generate the control signal by making the use of the pseudo-detection speed, thereby continuing to rotate the drive shaft for generating the impact regularly and consistently without causing a delay.

The invention discloses an automatic regulating apparatus for controller parameters of a servo driver of a motor and a method thereof. The apparatus comprises an inertia identifier, a parameter initial regulator, a parameter checker, a parameter optimizer, a parameter saving and displaying device, a speed controller, a position controller, a torque controller, a PWM (Pulse-Width Modulation) generator and a coded disc. In the invention, the servo driver of an alternating current permanent magnet motor automatically configures the parameters of the position controller and the speed controller according to different rotary inertias of mechanic load, checks and further optimizes the automatically configured parameters through the parameter checker and the parameter optimizer so that the position response and the speed response of the servo driver are relatively optimal. The servo driver of the alternating current permanent magnet synchronous motor automatically regulates the control parameters according to work occasions and achieves ideal control effect. The whole process is manual participation free and completed fully by the servo motor of the alternating current permanent magnet synchronous motor.

A impact power tool includes a motor rotating a drive shaft, an output shaft holding a tool bit, and a hammer coupled to the drive shaft. The hammer is rotatable together with the drive shaft and is engageable with an anvil fixed to the output shaft so as to give a rotary impact to the output shaft. The tool includes a speed commander generating a target speed intended by a user, and a speed detector for detection of a speed of the drive shaft. A speed controller generates a control signal for driving the motor by referring to the target speed and the detected speed. The speed controller provides a detection time frame, and to adopt a predefined pseudo-detection speed as a substitute for the detected speed when no speed detection is available within the detection time frame. Accordingly, even if no speed detection continues, i.e., the motor is stalled over the detection time frame, the speed controller can successfully generate the control signal by making the use of the pseudo-detection speed, thereby continues to rotate the drive shaft for generating the impact regularly and consistently without causing a delay.

The invention discloses a mixed control method based on trace tracking of a wheeled mobile robot. A kinematic virtual velocity controller, a sliding mode torque controller and a disturbance observer are involved in the mixed control method, wherein the sliding mode torque controller and the disturbance observer are based on dynamics. The virtual velocity controller is used for designing the linear velocity and the angular velocity of the robot; the sliding mode torque controller is used for designing a sliding mode face and a sliding mode control law, and the disturbance observer is used for observation of the external disturbance of a system to reduce the control quantity of the sliding mode controller and is introduced as a feedforward term. By means of the mixed control method, control over the trace tracking of the robot is achieved by the system under the condition that external change and external disturbance happen to a parameter. It is shown upon simulation experiments that by means of the mixed control method, chatter output by sliding mode control and output of the control quantity can be effectively reduced, and good robustness is achieved.

A multi-fan apparatus and method incorporates mutual active cancellation of fan noise and / or vibrations. The multi-fan apparatus includes two or more fans circuits, each comprising a fan, a fan speed controller and a separate tachometer, and a fan phase controller. The phase controller is connected to at least one fan speed controller and to each tachometer. Each fan's speed is independently and dynamically maintained at the same set speed by the fan speed controllers using an independent control loops. A noise and / or vibration cancellation phase difference between fans is determined in order to achieve destructive interference of pressure waves and, thus, noise and / or vibration reduction, in pre-determined region of a system incorporating the multi-fan apparatus. The phase controller establishes and maintains this cancellation phase difference between the fans based upon feedback from the tachometers.

The present invention provides a riding work vehicle that includes a running electric motor unit running and driving a driving wheel unit; a speed setting operation unit operated by a driver to set a target running speed; a working electric motor driving a work device that performs work on a worked object around a vehicle body corresponding to running of the vehicle body; and an exceptional speed controller that performs exceptional speed control to control the running electric motor unit at an exceptional speed lower than the target running speed in a case where load of the working electric motor evaluated by a work load evaluator that evaluates load of the working electric motor is abnormal load higher than a threshold value.

In order to provide a driving device for a motor having a capability equivalent to conventional vector control type sensorless method by simplifying the controls structure to reduce number of parts to be adjusted, and to stabilize the control system, a driving device for a synchronous motor does not include a speed controller or a current controller, and calculates a voltage impressed on a motor on coordinate axes (dc / qc axes) based on a magnetic pole axis. For calculating a voltage command, command values such as a rotation speed command and a current command are used, and Iq* corresponding to a torque current command is calculated and provided based on a detected current value.

A surgical device includes a housing, a drive shaft, a motor, a control button, and a motor speed controller. The motor is configured to rotate the drive shaft that is disposed within housing. The control button is disposed on the housing and the motor speed controller is operably associated with the control button. The motor speed controller varies an angular velocity of the motor as a function of a percent of actuation of the control button between an unactuated position and a fully actuated position.

A system (18) for controlling a safety system (44) of an automotive vehicle (10) includes a longitudinal acceleration sensor (36), a vehicle speed sensor (20), a lateral acceleration sensor (32), a yaw rate sensor, and a controller (26). The controller (26) determines a stability index and provides a first observer that determines a reference longitudinal velocity in response to the longitudinal acceleration signal, the yaw rate signal, a pitch attitude and vehicle speed from wheel speed sensors. The controller (26) determines a reference lateral velocity in response to the lateral acceleration signal, the yaw rate signal, a roll attitude, a pitch attitude and vehicle speed from the wheel speed sensors. The controller provides a second observer that determines a second longitudinal velocity in response to the longitudinal acceleration signal, the yaw rate signal, a lateral velocity, the pitch attitude and a first adjustment based on the longitudinal reference velocity. The controller determines a second lateral velocity in response to the lateral acceleration signal, the yaw rate signal, a roll attitude, a pitch attitude and a second adjustment based on the lateral reference velocity. The controller determines an output lateral velocity and an output longitudinal velocity in response to the first observer, second observer and the stability index. The controller controls the safety system in response to the output lateral velocity and the output longitudinal velocity.

An AC motor speed controller includes a plurality of capacitors that may be selectively switched, by means of controllably conductive switches, into series electrical connection with an AC motor and an AC voltage source to control the speed of the motor. To change the speed of the motor, a control circuit renders a first switch conductive, in response to a first detected AC voltage zero crossing, to charge a first capacitor to a predetermined voltage. The control circuit then renders a second switch conductive, in response to a subsequent second detected AC voltage zero crossing, to charge a second capacitor to the predetermined voltage. The control circuit then renders both switches simultaneously conductive at a predetermined time after a subsequent third detected AC voltage zero crossing. The capacitors will thereby be charged to the same voltage prior to being switched into series with the motor, thereby resulting in reduced acoustic noise when changing motor speeds.

An auto-cruise apparatus having a constant vehicle speed controller and a mode selector is provided. The constant vehicle speed controller controls the vehicle speed such that the vehicle speed is maintained at the set vehicle speed whether a preceding vehicle may exist or not. The mode selector selects in accordance with predetermined operations upon the input means, either a vehicle-to-vehicle distance control mode in which a travel of the subject vehicle is controlled by the vehicle-to-vehicle distance controller or a constant vehicle speed control mode in which the travel is controlled by the constant vehicle speed controller. A travel control by either the vehicle-to-vehicle distance controller or the constant vehicle speed controller is performed in accordance with a travel mode that has been selected by the mode selector.

A present invention relates to a novel hybrid intelligent control system and method for power generating apparatuses, in which the control system comprises: a fuzzy sliding mode speed controller, embedded with a fuzzy inference mechanism so as to be used for controlling the speed of a power generating apparatus; and a radial basis function network (RBFN) pitch controller, being embedded with an on-line training RBFN so as to be used for controlling the pitch angle of a turbine coupled to the power generating apparatus. In a variable-speed energy conversion system using the aforesaid control system, the turbine can be driven to operate at its maximum efficiency by adjusting its blade pitch angle in response to the variation of the input flowing into the turbine, while allowing the shaft speed of the power generating apparatus to be controlled by a fuzzy interference mechanism so as to achieve its maximum power output.

A self-cleaning, gas-fired tunnel oven is provided. One embodiment of the oven provides a self-cleaning, gas-fired tunnel oven for cooking food products. The oven includes a control system that regulates oven temperature during a pyrolitic, self-cleaning procedure for incinerating contaminants that accumulate inside; a burner for cooking food products and incinerating contaminants; a modulating air and fuel control system arranged for proportionally delivering air and fuel to the burner; a plurality of convection air fingers for directing heated air toward the food products; a collapsible conveyor, capable of fitting into the oven when collapsed, for passing the food products through the oven; a plurality of blowers, each having a dedicated speed controller; a floating cooking chamber; and a vent system that maintains a negative pressure in the oven during the self-cleaning procedure

The invention discloses a high-precision drive and control integration motor which comprises a power supply interface, wherein a load position detection sensor, a reducer, a motor, a motor rotor position detection sensor, and a debugging interface which is connected with a drive and a controller are integrated with a site bus interface, i.e. an output shaft connected with the load position detection sensor is directly connected with a load, two sides of the motor are respectively coaxially connected with the motor rotor position detection sensor and the reducer, the load position detection sensor and the load are coaxially arranged, and signals of the load position detection sensor and the motor rotor position sensor are led to the drive and the controller by shielding wires. The invention leads a system to have better impact and shock resistance property, is more suitable to the industry control environment; the load position detection sensor, the reducer, the motor, and the like are integrated; the backlash nonlinearity is effectively inhibited by a position controller, a speed controller and a current controller, and the system precision is improved.

The invention provides a sliding-mode control method of a permanent magnet synchronous motor based on reaching law and disturbance observation compensation. A new reaching law algorithm is designed, and applicable in design of a speed controller in a sliding-mode variable structure; simultaneously, a saturation function is used in a disturbance observer control law, and used for improving a disturbance observer; a value observed by the disturbance observer is compensated in the speed controller; and therefore, a new control strategy is formed. The new control method is applicable in a vector control system of the permanent magnet synchronous motor; a current-speed double-closed-ring control structure is adopted; for buffeting and anti-interference problems in the sliding-mode control, an integral sliding-mode surface and a new reaching law are added based on the conventional sliding-mode speed controller; simultaneously, the disturbance observer is added; disturbance due to load changeis effectively inhibited; the responsiveness of the system is improved; buffeting of the system is reduced; and the anti-interference performance and the robustness of the system in a complex environment are obviously improved.

The invention relates to an automatic speed adjusting pipe cleaner for a natural gas pipeline, and aims at solving the problem of the existing battery-based control method of driving a bypass valve with a motor. The automatic speed adjusting pipe cleaner is of a pure mechanical structure. According to the technical scheme, the automatic speed adjusting pipe cleaner is characterized in that the inner wall of a pipeline is compressed by a speed acquisition wheel; the speed acquisition wheel drives a center shaft to rotate by a belt transmission manner, and the center shaft rotates to drive a mass block to rotate to control the opening degree of a throttling valve through the eccentric force of the mass block, and the throttling valve can also be automatically adjusted based on the speed. The speed controller is simple in structure, is not provided with any electrical apparatus element, is safe and reliable, and can be applied to long-distance cleaning of the natural gas pipeline; a pipe detection device can be carried.

A speed controller for motor vehicles is provided, the vehicle having a distance regulating function, a locating system for detecting locating data for objects that are in front of the vehicle, and an evaluation device for determining whether a located object needs to be treated as a relevant target object in the vehicle's lane. The speed controller includes a monitoring module that is designed to detect, by reference to the locating data, a situation in which objects not detected by the locating system are within close range and, in this situation, issue a takeover prompt to the driver.

A cordless hair dryer device comprising an ergonomically shaped handle, air cone, rechargeable lithium-type battery pack that releasably attaches to a battery mount on the back of the hair dryer, temperature controls, blower speed controls, DC motor, heater and battery pack charger. The handle is ergonomically designed for balance and comprises the heat and blower controls for convenient access and use. The heater comprises a tourmaline impregnated ceramic heater. Intake air flows over the tourmaline / ceramic heater producing negative ions so the hair does not become statically charged during the drying process. The air intake at the back of the hair dryer includes a removable filter to catch errant fibers and hair before they flow into the blower / heater area. The motor and tourmaline impregnated ceramic heater are mounted close to the battery pack in a manner that provides easier control.

The present invention relates to a control system for a refuse vehicle and a method for controlling a refuse vehicle provided with at least one refuse container location sensor, at least one vehicle speed control, and one or more electronics. The one or more electronics receive and process signals from the at least one refuse container location sensor and outputs a control signal to the at least one vehicle speed control to stop the refuse vehicle at a predetermined location with respect to a refuse container.

An ESP variable speed drive controller functions in conjunction with a safety logic solver, dedicated pressure sensors and a surface emergency isolation valve, or safety shut-off valve (SSV), to perform a full functional test of the complete wellhead flowline system. The method includes the step of using a plurality of pressure transmitters to monitor the flowline pressure during normal operations and during a full stroke test of the safety shutoff valve and adjusting the speed of the downhole ESP during the test to maintain the pipeline pressure within predetermined safe pressure limits. This wellhead flowline protection system and method utilizes the downhole ESP speed controller and an SSV to ensure that dangerous pressure levels are not reached and provides for full functional safety testing of the wellhead system. The ESP motor speed controller is used to permit functional testing and remove the pressure source from protected downstream flowline piping.

A remote control for a treadmill includes a housing, in which a battery chamber and a circuit board are provided. The housing has a speed controller, a slope controller, a pulse sensor and an emergency stop button, which are electrically connected to the circuit board. The circuit board emits signals to control the treadmill by wireless according to the manipulation of the remote control of the present invention.

A motor drive control device for controlling a rotational speed of a motor includes: a motor driver for rotationally driving a motor; a correction amount calculating section for detecting a rotational speed of an output of the motor in accordance with an alternate current signal outputted from an FG sensor and detecting a rotational position of a photoconductive drum, which is rotated by a rotational drive force of the motor, in accordance with a pulse outputted from an encoder; a speed controller for generating a speed control signal corresponding to a total correction amount, which is a sum of a correction amount calculated in the correction amount calculating section based on a rotational speed of the motor and a correction amount calculated based on a rotational position of the photoconductive drum, and outputting the generated speed control signal to the motor driver.