52results about How to "Easy Feedback Control" patented technology

Embodiments of the present invention provide a unique surgical handpiece having improved operation, durability and reliability. In one embodiment, the present invention provides a motorized handheld surgical instrument having one or more sensors for sensing motion, position, pressure, humidity, and various other environmental conditions relevant to the operation and maintenance of the surgical instrument.

A material deposition system for additive manufacturing including an extruder and a measuring device for measuring the viscosity and / or other rheological properties of a build material contained within the extruder. The measuring device may provide feedback to a controller for controlling one or more parameters depending on the measured viscosity and / or other rheological properties of the build material within the extruder. Two or more feed materials may be supplied to the extruder and a mixing device may be configured to mix the feed materials within the extruder to create a blended deposition material. The mixing device may be operatively coupled to the measuring device for simultaneously measuring the viscosity and / or other rheological properties of the materials during mixing. The controller may be configured to independently control one or more parameters associated with the materials depending on the viscosity and / or other rheological properties measured by the measuring device.

A device for automatically controlling a slide door for a vehicle, wherein the slide door is adapted to open and close along a guide track installed in a vehicle body, the device having a door drive device, a motor load detection device, a door position detection device adapted to detect a position of the slide door guided by the guide track within a range from a position where the slide door is fully opened to a position where the slide door is fully closed, a door speed detection device, a memory device adapted to store the motor load at each position of the slide door of the vehicle standing at a horizontal level, and a motor control device adapted to automatically control power supplied to the motor for moving the slide door based on a difference between a detected motor load and a stored motor load at a corresponding position

The present invention provides a method and apparatus (20) for controlling a registration between a target point (22) on a moving web (24), and a production outcome provided by a production operation. A method aspect can include a transporting of the web (24) along a movement direction (26) past a reference detector (30), and a detecting of at least a first reference point (50) on the web (24). The target point (22) can be designated by employing at least the first reference point (50). The web is transported past a speed-sensor (32), and the speed-sensor can measure a web speed of the moving web (24) to provide an output of web speed data. The web speed data is integrated over time to determine a web-length which has been transported past the speed-sensor (32). The production outcome is actuated at a production-device (34), and the actuating of the production outcome can be adjusted to occur after a reference-length of the web (24) has been transported past the speed-sensor (32).

The invention relates to a piezoelectric-ceramics-based high-speed high-precision macro-micro platform and a switching method. The macro-micro platform comprises a platform base plate and a voice coil motor, wherein the platform base plate is disposed on a vibration isolation pedestal, the voice coil motor is disposed at one side of the platform base plate, and the voice coil motor comprises a voice coil motor shell, a voice coil motor magnet assembly, a voice coil motor coil, a voice coil motor linearity encoder and a motor shaft connecting rack. Because the voice coil motor is used to drive the platform to feed in a large stroke and a high speed, and a piezoelectric ceramics is directly connected with an output shaft of the voice coil motor, the macro-micro platform is compact in structure and easy to feedback control. Additionally, the platform is provided with the piezoelectric ceramics which plays a vibration damping effect on the high-speed motion platform by applying an opposite acting force, so that the problem that the high-acceleration motion platform is large in vibration and hard to be stable rapidly; and after the platform is stable, the piezoelectric ceramics switches functions for driving the micro platform to move, and by closed ring control of an absolute grating, the precision positioning of platform micro motion is realized.

A base station apparatus includes: a scheduling unit configured to determine resources to be assigned to one or more users requesting downlink communication; a unit configured to determine a PV applied to a plurality of antennas according to a feedback signal from each user apparatus; a communication scheme determination unit configured to determine for each user whether to perform feedback control of PV every predetermined number of resource blocks (RB) according to a downlink data amount requested by each user; and a unit configured to transmit a downlink signal from the plurality of antennas using resources determined by the scheduling unit. When the feedback control of PV is performed commonly for RBs in the system band, the communication scheme determination unit also determines whether to use delay diversity for downlink communication.

A belt driving control apparatus, the belt driving control apparatus having an endless belt, a driving roller driving the endless belt, a driving motor driving the driving roller, at least one idler roller being dependent on the endless belt, and an encoder attached to one of the idler roller, the belt driving control apparatus includes a structure where a control target value of the driving motor is set so that an effective speed of the endless belt is constant and the driving motor is drive-controlled so that the control target value is satisfied.

For output current detection of a voltage regulator, the currents in a high-side transistor and a low-side transistor of the voltage regulator are sensed and summarized to a summed current to flow through a setting resistor. The voltage variation on the setting resistor is monitored to provide a feedback signal for feedback control in the voltage regulator. This detection scheme removes the current sensing resistor from the charging current path of the voltage regulator to prevent efficiency loss on it, and is much less sensitive to noise interference because greater voltage variation is available by using a greater setting resistor.

A method for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one embodiment, the method comprises indicating exhaust gas sensor degradation based on a time delay and line length of each sample of a set of exhaust gas sensor responses collected during a commanded change in air-fuel ratio. In this way, the exhaust gas sensor may be monitored utilizing robust parameters in a non-intrusive manner.

The invention provides a control system of a humanoid biped robot. The robot comprises two leg parts and 12 degrees of freedom, each degree of freedom is corresponding to one joint motor. The control system comprises a main controller installed on the body of the robot, and joint controllers, motor driving circuits, motor encoders, joint angle sensor and feedback conditioning circuits which are respectively corresponding to the joint motors, and plantar pressure sensors and plantar gyroscopes installed on soles of two feet of the robot. The control system is characterized in that the main controller receives information feedback of the plantar pressure sensors and gyroscopes, plans a path and transmits motion instructions to each joint controller; and the joint controllers control joint motors to execute the motion instructions, receive information fed back by the motor encoders and the joint angle sensors and utilize a fuzzy self-adaptation PID control method to precisely control the motors according to the feedback information, so that the robot is enabled to walk precisely according to the ground condition.

A feedback control for a polymer dispensing system, which otherwise continuously adjusts the polymer feedrate so as to keep the measured streaming current of filtrate from a sludge dewatering process at one predetermined setpoint. The feedback control includes a video camera focused on sludge as it trails behind plows on a dewatering belt, a video image processing system for converting the video signal into single numbers known as “camera readings”, and a computer programmed both to compare them with a “camera reading” setpoint and to determine whether the filtrate charge is more positive or more negative than it normally is whenever the “camera reading” deviates from its setpoint by a threshold amount. A controller, activated by the computer, incrementally resets the polymer feedrate in such a direction as to restore the normal cationic charge of the filtrate. The feedback control uses the streaming current value measured immediately after each “camera reading” excursion to update the streaming current setpoint.

This invention is a device for real-time measurement of torque output from an automobile engine. The device measures the deformation of damper springs of a planar clutch plate and interprets the deformation as the output torque while the automobile is in operation. The device is comprised of (i) a planar disc clutch plate which includes damper springs, (ii) first and second sets of posts which are welded onto the clutch plate, (iii) a signal pick-up sensor and (iv) an electronic circuit to process the picked-up signals.

Systems and methods for monitoring an exhaust gas sensor coupled in an engine exhaust are provided. In one example approach, a method comprises indicating exhaust gas sensor degradation based on a downstream exhaust gas sensor responding before the upstream exhaust gas sensor during a commanded change in air-fuel ratio.

A data transfer apparatus is composed of a transmitter and a receiver. The transmitter includes an output buffer developing a differential signal in response to a data signal, and an amplitude controller. The receiver includes an input buffer converting the differential signal into a single-end signal, and an amplitude detector developing a feedback signal in response to the single-end signal. The amplitude controller controls an amplitude of the differential signal in response to the feedback signal.

An optical probe (and method) for measuring a surface in an environment containing a first substance, includes a light source for transmitting a light onto an area of the surface to obtain a measurement, a source of the first substance including one of a fluid and a gas for displacing a second substance from an area of the surface receiving the light, and a measuring device for receiving the light being reflected from the surface and for determining a measurement of the surface based upon the reflected light.

An optical probe (and method) for measuring a surface in an environment containing a first substance, includes a light source for transmitting a light onto an area of the surface to obtain a measurement, a source of the first substance including one of a fluid and a gas for displacing a second substance from an area of the surface receiving the light, and a measuring device for receiving the light being reflected from the surface and for determining a measurement of the surface based upon the reflected light.

The invention discloses a long wire harness automatic threading machine and method. The long wire harness automatic threading machine and method are characterized in that the table top of a working table is divided into a tube threading region and a wire threading region with the same length; a threading pole is arranged at the center of the table top in the tube threading region in the length direction of the working table; a guide rail is arranged in the length direction of the table top of the working table; a clamping mechanism clamps a sleeve tube and moves along the guide rail in a reciprocated manner to sleeve the sleeve tube to the threading pole or the wire harness; a controller controls movement of the clamping mechanism; in the long wire harness automatic threading machine and method, the working table region is divided into the tube threading region and the wire threading region; the threading pole is taken as an intermediate medium; the sleeve tube sleeves the threading pole in the tube threading region, and then the sleeve tube sleeves the wire harness in the wire threading region; and the clamping mechanism automatically clamps and moves the sleep tube in the two regions. The long wire harness automatic threading machine can automatically complete the work of tube threading and wire threading, can realize mechanical operation so as to enable the work to be more convenient, thus saving time and energy of manual operation, and improving the work efficiency.

A material deposition system for additive manufacturing including an extruder and a measuring device for measuring the viscosity and / or other rheological properties of a build material contained within the extruder. The measuring device may provide feedback to a controller for controlling one or more parameters depending on the measured viscosity and / or other rheological properties of the build material within the extruder. Two or more feed materials may be supplied to the extruder and a mixing device may be configured to mix the feed materials within the extruder to create a blended deposition material. The mixing device may be operatively coupled to the measuring device for simultaneously measuring the viscosity and / or other rheological properties of the materials during mixing. The controller may be configured to independently control one or more parameters associated with the materials depending on the viscosity and / or other rheological properties measured by the measuring device.

A fuel supply apparatus for a Gasoline Direct Injection (GDI) engine having reduced pressure pulsation includes low and high pressure fuel pumps, connected via a fuel supply line, a pressure sensor and a pulsation relief valve installed between the pressure sensor and the high pressure fuel pump. The pulsation relief valve includes a check valve part allowing the fuel to flow in a normal direction from the low pressure fuel pump to the high pressure fuel pump but not in a reverse direction, and an orifice part which is installed substantially in parallel to the check valve part and is configured to allow the fuel to flow in both directions, wherein an amount of the fuel flowing through the orifice part is less than an amount of the fuel flowing through the check valve part in the normal direction.

A feedback control for a polymer dispensing system, which otherwise continuously adjusts the polymer feedrate so as to keep the measured streaming current of filtrate from a sludge dewatering process at one predetermined setpoint. The feedback control includes a video camera focused on sludge as it trails behind plows on a dewatering belt, a video image processing system for converting the video signal into single numbers known as “camera readings”, and a computer programmed both to compare them with a “camera reading” setpoint and to determine whether the filtrate charge is more positive or more negative than it normally is whenever the “camera reading” deviates from its setpoint by a threshold amount. A controller, activated by the computer, incrementally resets the polymer feedrate in such a direction as to restore the normal cationic charge of the filtrate. The feedback control uses the streaming current value measured immediately after each “camera reading” excursion to update the streaming current setpoint.

The invention relates to an intelligent control system for a planting protection unmanned aerial vehicle. The intelligent control system comprises a general controller, a driving module, a steering module, an auxiliary module, and a spraying module; the driving module is used for controlling the flight of the plant protection unmanned aerial vehicle according to operation instructions of the general controller; the steering module is used for controlling steering of the plant protection unmanned aerial vehicle according to the operation instructions of the general controller; the auxiliary module is used for assisting the driving module and the steering module for flight and steering; the spraying module comprises a spraying control unit, a liquid pump, a nozzle of a medicine box, and a spraying detection unit; the spraying control unit is used for receiving the operation instructions of the general controller and controlling the operation of the liquid pump according to the operationinstructions, and liquid or clean water in the medicine box is uniformly sprayed from the nozzle of the medicine box; and the spraying detection unit is used to detect the operating status of the spraying module. The intelligent control system for the planting protection unmanned aerial vehicle has the beneficial effects that the operation of the plant protection unmanned aerial vehicle can be controlled in real time, the safety is high, the degree of intellectualization is high, and variable spraying can also be realized to improve the precision of spraying.

The invention discloses a train automatic-parking executing system which comprises a servo motor, a driving beam, a driven beam, a turnout control relay, a trolley, a turnout structure with magnetic levitation plates and a turnout controller. The turnout structure with the magnetic levitation plates is arranged on the driven beam. The servo motor is mounted under the driving beam and connected with the trolley, the turnout control relay and the turnout controller. The driving beam and the driven beam are mechanically connected. The servo motor drives the trolley to drive the driven beam, underthe action of the driven beam, the turnout structure with the magnetic levitation plates, the driven beam and the driving beam are moved to a set rail as a whole, and thus a train runs to the set rail. An existing magnetic levitation rail structure is improved, levitating magnets are arranged in groove structures, airflow resistance is reduced, energy consumption of the magnetically levitated train is lowered, the safety guarantee capacity of magnetic levitation traffic is enhanced, and riding of magnetic levitation traffic is more quiet and comfortable.

An optical encoder is disclosed, in particular, which has a light sensing element with light-sensing cells arranged in a matrix. The light sensing element repeatedly detects the same reflective light beam by different rows of light-sensing cells to increase the precision of feedback control. Furthermore, since the light sensing element synchronously and repeatedly receives the reflective light beam, the reliability of detected signals is increased.

The invention discloses a low-frequency electromagnetic vibration table system based on induction coil feedback control, which comprises a signal generator, a speed feedback control device, a power amplifier and a low-frequency electromagnetic vibration table. A driving coil and an induction coil are arranged on the moving ring of the low-frequency vibration table. The speed feedback control device comprises a feedback part and a control part. the induced voltage input feedback part of the induction coil, the reference signal output by the signal generator and the feedback signal output by thefeedback part are respectively input to the control part, and the control section forms a control signal input drive coil with a reference signal and a feedback signal. According to the invention, aninduction coil is arranged on the vibrating table moving ring, the vibration table speed extraction is realized by detecting the induction voltage of the induction coil, the equivalent resistance ofthe driving coil is not directly detected, and the speed detection network constructed by the method does not need series resistance on the driving coil and establishes a corresponding analog circuit,so that the structure of the speed extraction device is simplified.

In an air-fuel ratio feedback control for an engine, a cylinder-by-cylinder variation value is calculated for each cylinder based on changes of intake pipe pressure detected by an intake pipe pressure sensor, or the like, and a fuel injection amount or the like is corrected for each cylinder based on the variation value. When the variation is large during an engine operation, or until the variation correction is completed, it is determined that the output of an exhaust gas sensor will be disturbed by the variation and an air-fuel ratio feedback correction amount will be disturbed. Therefore, a control gain of the air-fuel ratio feedback control is changed to a value smaller than a normal value, or the feedback control is inhibited.

A laser interferometer that includes a laser interferometer, an position sensitive detector detecting an offset of an optical axis of the laser interferometer, a biaxial rotator turning the laser interferometer toward an arbitrary direction, an angle sensor detecting a rotation angle of the biaxial rotator, a retro reflector reflecting reflected light in a direction parallel to incident light, and a controller performing feedback control of the biaxial rotator so as to track the retro reflector based on signals from the position sensitive detector and the angle sensor. The tracking-type laser interferometer starts tracking control when return light from the retro reflector is returned to a detection range of the position sensitive detector, and changes gain for the feedback control in accordance with a behavior for a position of the return light on the position sensitive detector due to the tracking control.

The invention relates to an ultrasonic control circuit triggered by position and pressure and a welding method. The ultrasonic control circuit includes a sensing detection circuit body, a sampling circuit body, a main control circuit body, an interface circuit body, a driving circuit body and a power supply, wherein the sensing detection circuit body is electrically connected with the sampling circuit body; the sampling circuit body, the interface circuit body and the driving circuit body are respectively electrically connected with the main control circuit body; and the driving circuit body is electrically connected with an ultrasonic generator. According to the ultrasonic control circuit, the displacement signal of the vibration group of the ultrasonic generator and the pressure signal between an ultrasonic welding head and a product to be welded are collected; the vibration is controlled to a preset amplitude before the ultrasonic welding head is in contact with the product to be welded; time is kept after the ultrasonic welding head is in contact with the product to be welded; the problem that in the welding process, the time occupied by the vibration of the ultrasonic weldinghead to a preset amplitude results in insufficient welding time or the waste of welding energy is avoided; the welding time or the welding energy is accurately controlled; the welding defect rate is greatly reduced; and the consistency of welding products is ensured.

The invention provides a fuel injector needle valve displacement curve prediction method for a jerk fuel injection system. According to the motion characteristics of a fuel injector needle valve and the pressure fluctuation characteristics of a fuel pressure curve, the opening and closing phases of the needle valve are determined, and the delay of pressure waves is then calculated to obtain a displacement curve of the needle valve. A needle vale displacement sensor can be replaced, the problems of the displacement sensor, such as difficulty in installation and high cost, are solved, and the objectives of combustion analysis, fault diagnosis and feedback control carried out on an engine are achieved.

The invention discloses a power supply feedback control system and method, and relates to the technical field of voltage control. The system comprises a sampling circuit, an error amplifier, a controller, a pulse width modulator and a switching converter, the signal input end of the sampling circuit is connected with a power supply and a load, and the signal output end of the sampling circuit is connected with the signal input end of the error amplifier. The signal output end of the error amplifier is connected with the signal input end of the controller, the signal output end of the controller is connected with the signal input end of the pulse width modulator, and the signal output end of the pulse width modulator is connected with the signal input end of the switching converter. According to the invention, the jitter deviation of the power supply voltage can be all fed back to the voltage signal of the output end of the sampling circuit, simple and effective feedback control is realized, and the rapidity and accuracy of a power supply control system are improved.

An exhaust gas recirculation system for an internal combustion engine is provided. The exhaust gas recirculation system includes: an EGR passage configured to connect an exhaust gas passage of the internal combustion engine with an intake air passage; an EGR cooling system arranged at the EGR passage; and a control device configured to control the EGR cooling system. The control device is configured to provide feedback control of the cooling efficiency of the EGR cooling system to cause the temperature of intake gas suctioned into a cylinder of the internal combustion engine to approach a target intake gas temperature. The control device is configured to more increase the amount of change of the cooling efficiency when the flow rate of EGR gas recirculated is less.