134results about How to "Eliminate hysteresis" patented technology

A state of charge control system and method uses a region of voltage linearity and a long-term average voltage to estimate an average battery state of charge for storage batteries and to eliminate errors due to hysteresis, drift and sensor noncompliance. An average state of charge Sn is calculated using a current integral method and an average state of charge Sv based on an average observed voltage Vn for a time period exceeding a predefined minimum time but before a predefined maximum time has elapsed is also calculated. If the absolute value of the difference between the Sv and Sn are not are within an acceptable error band, then an offset value is calculated to correct the Sn by subtracting the Sv from the Sn, and thus, to maintain a more accurate Sn. Additionally, a closed current integral method is used to reduce errors due to hysteresis.

The invention discloses a device and a method for rehabilitation training. The device comprises a pelvis mechanism unit, a stand column support mechanism unit, a treadmill unit, and a control unit. The stand column support mechanism unit is fixed on the treadmill unit. The pelvis mechanism unit is connected with the stand column support mechanism unit and can move axially along the stand column support mechanism unit. The pelvis mechanism unit comprises a first four-rod mechanism formed by a base, a first connecting rod, a second connecting rod, and a connecting box, and a second four-rod mechanism formed by a third connecting rod, a fourth connecting rod, a first supporting arm, and a second supporting arm. The first four-rod mechanism and the second four-rod mechanism are movably connected. A method for connecting a pelvis of a patient through the pelvis mechanism provides a weight reduction function. The pelvis structure has multiple degrees of freedom, and can swing with natural swing of a pelvis when a patient walks. Weight reduction supports on a pelvis position prevent pendulum effect caused by an overhanging weight reduction method, so that a body can naturally swing when walking.

Provided is a dual mechanical port magnetic conductance harmonic type electromagnetic gear composite permanent magnet motor which can be widely applied to industrial transmission fields such as wind power generation, electric automobiles, ship driving and server driving. The electromagnetic gear composite permanent magnet motor is characterized is that main transmission components of the electromagnetic gear composite permanent magnet motor consists of a stator formed of a stator iron core (9) and a stator winding (8) having 2ps poles, a permanent rotor formed of a rotor iron core (17) equipped with 2pr rotor permanent magnets (18) and an output shaft (16), and a salient pole magnetic conductance wave rotor (6) having Zb salient poles, wherein a numerical difference between the number of pole-pairs ps and pr is relatively small; and the stator, the permanent magnet rotor and the salient pole magnetic conductance wave rotor (6) are coaxially disposed, are mutually coupled through a radial air-gap magnetic field, and are mutually coupled in a salient pole straight axis area of the high-speed rotating salient pole magnetic conductance wave rotor (6) by using a principle of heteropolarity magnetic field attraction with a small pole difference so as to drive the permanent magnet rotor with a small pole difference to rotate at a low speed. Therefore, power speed changed and torque conversion controlled drive with no mechanical contact and no friction is realized.

The invention provides a display driving method, a display panel and a display device, solving a problem that the abnormality of displaying a picture of an OLED (Organic Light-Emitting Diode) display is caused by the hysteresis effect of a driving transistor when an OLED display panel is powered off and is electrified again. The method comprises the steps: within the present duration after the electrification of the display panel, controlling the on-off of a transistor for lighting up an organic LED driven by a pixel compensation circuit in the pixel compensation circuit, controlling the switch-on of the driving transistor in the pixel compensation circuit and enabling electricity current to run between the source electrode and the drain electrode of the driving transistor; within the present duration after the electrification of the display panel, controlling the pixel compensation circuit to drive the organic LED to emit light according to received data signals, wherein the preset duration is not smaller than the time duration of displaying a picture frame by the display panel.

The invention relates to a method for automatically capturing a microball in an optical tweezer system. The method comprises the steps of setting an initial image background; presetting a path, and controlling a micron displacement table to perform a search according to the path; processing each frame of image, and when the microball exists in a view field, outputting the position, the diameter and an ID feature of the microball; after the feature of the microball in the view field is obtained, interrupting the search path to generate a capture path, and performing PI closed-loop control on particles according to a planned path until the particles are successfully captured, otherwise, returning to the search path again for performing the search; judging whether the particles are successfully captured or not; and when other excess particles occur near the captured particles, generating an avoidance path. According to the method, the microball capture efficiency can be greatly improved.

The invention discloses a flexible low-voltage organic field effect transistor and a manufacturing method thereof. Three layers of polymers are added between a gate and a semiconductor layer interface to serve as an insulated layer; the overall device comprises a source and drain electrode, a semiconductor, a high-insulation polymer, a high-dielectric constant material polymer, a high-insulation polymer, a gate, and a flexible transparent plastic substrate sequentially from top to bottom; and the dielectric layer with the structure has excellent insulation and good stability. Through measuring electrical properties and a semiconductor particle growth shape, whether the device is a flexible low-voltage organic field effect transistor can be judged. The organic field effect transistor has the advantages of realizing high mobility and large switch ratio under low voltage, maintaining good performance when bias voltage is applied and in a high temperature condition, and having good stability features in different bending modes.

To provide a developing device capable of preventing the hysteresis phenomenon. The developer of the developing device contains a toner and a carrier. The toner and the carrier are charged to a polarity different from each other by frictional contact thereof. The developing device has a first conveyance member and a second conveyance member which faces an electrostatic latent image bearing body via the second region. An electric field forming device forms a first electric field between the first conveyance member and the second conveyance member to move the toner in the developer retained by the first conveyance member to the second conveyance member, and forms a second electric field between the second conveyance member and the electrostatic latent image bearing body to move the toner retained by the second conveyance member to an electrostatic latent image of the electrostatic latent image bearing body. The first electric field is an oscillating electric field having both a function to supply the toner to the second conveyance member and a function to collect the toner from the second conveyance member while a time average field strength is biased to a side where the toner is supplied from the first conveyance member to the second conveyance member, and a time ratio for carrying out the function to collect the toner from the second conveyance member to the first conveyance member is 60 to 80%.

The invention discloses a travel trailer synchronous following braking control method considering a delay characteristic of an electromagnetic braking system. Firstly whether a main car brake signal lamp is powered on or not is detected, if not, an electromagnetic brake is maintained to be switched off, if yes, a pre-braking torque signal is output to conduct pre-braking on a motor home; a main car braking deceleration is further detected, a following deceleration of the motor home is previewed and estimated according to the main car braking deceleration, a corresponding control signal is output to the electromagnetic brake, and thus braking operation of the motor home is achieved; and when the motor home is subjected to braking, the situation of switched on / off of the main car braking signal is synchronously monitored, and a following braking torque in the next moment is detected and previewed continuously, till the main car braking signal is cleared. The travel trailer synchronousfollowing braking control method can preview the main car braking deceleration in advance, and maximally overcomes the delay influence of the braking system so that the deceleration of the motor homecan be maintained to be consistent with that of a main car in real time, and accordingly more stable braking is achieved.

Provided by the invention is a piezoelectric ceramic actuator control method based on a particle swarm algorithm. The method comprises: S1, mathematic modeling is carried out on a piezoelectric ceramic actuator by using an electromechanical coupling nonlinear total parameter dynamical model to obtain a dynamical model of the piezoelectric ceramic actuator; S2, on the basis of a pseudo-spectral method, the dynamical model of the piezoelectric ceramic actuator is processed discretely and an optimal control problem is transformed into a nonlinear planning problem; S3, a fitness function of the particle swarm algorithm is obtained based on the nonlinear planning problem; and S4, the fitness function is solved by using the particle swarm algorithm to obtain a global optimal solution. Therefore,the hysteresis characteristic of the piezoelectric ceramic actuator is eliminated and the positioning accuracy of the piezoelectric ceramic actuator is improved.

The invention discloses a driving circuit of a magnetic field sensor based on amorphous filler metal and an application method of the driving circuit. The driving circuit comprises a magnetic core motivation portion, a magnetic core replacement portion, a signal sampling and amplifying portion and a power source portion. A symmetric difference sampling circuit structure is adopted, and the charge injection effect brought by an analogue switch or a field effect transistor is eliminated. A current is exerted in metal receiving coils to replace magnetic cores, and therefore the magnetic-lag of the magnetic cores is removed; the even number of series-connection magnetic cores and a metal receiving coil structure in a symmetric winding manner are adopted, and therefore the inductive coupling effect between the magnetic cores and the receiving coils is eliminated, and the capacitive coupling effect of motivation current on the metal receiving coils is reduced, so that the signal-to-noise ratio and the linearity of output signals of the sensor are improved; each magnetic core is segmented into a plurality of isometric small segments, and the magnetic field detection range and the magnetic field sensitivity of the sensor can be conveniently controlled.

A sensor device is for measuring forces applied to an object to be sensed. The sensor device, includes a magnetic field generating element, a magnetic field sensing element, a driving unit being adapted to drive the magnetic field generating element with a first and second driving signal having a first and second frequency, and an evaluation unit. The sensor device is able of compensating a hysteresis of the object to be sensed.

The invention provides a driving circuit and a driving method for improving scanning accuracy of a YIG (yttrium iron garnet) filter. According to the method, a nonlinear tuning curve of a whole scanning frequency band is simulated in a segmentation fitting mode, the whole scanning frequency band is divided into a plurality of small bands, a tuning curve is linear in each small band, and the gradient and the intercept of the tuning curve can be dynamically compensated and corrected in real time according to scanning widths and scanning speeds, so that the scanning accuracy of the YIG filter is improved. By the aid of the scheme, the tuning curve of the YIG tuned filter at different frequencies, different scanning widths and different scanning speeds can be obtained, the scanning process includes calling and real-time dynamic compensation and correction of corresponding DAC (digital-to-analog converter) values under synchronization of count pulse, various software algorithms for eliminating the hysteresis effect of the YIG filter are omitted, so that time is effectively shortened, and the scanning accuracy is improved.

The invention relates to a test device and method for improving transient response through mixed turbocharged waste heat. The impeller end of a turbocharger is connected with a gas inlet pipe, the impeller end is connected with a gas inlet of an engine through a gas entering pipe, a waste gas outlet of the engine is connected with the turbine end of the turbocharger through a pipeline, the output end of the turbine end is connected with an exhaust pipe, the exhaust pipe is provided with a power turbine, the power turbine is connected with an electric generator, the electric generator is electrically connected with the input end of a storage battery through a rectifying circuit, a filter circuit and a voltage stabilizing circuit, the output end of the storage battery is electrically connected with an inverter, a frequency converter and a high-speed motor in sequence, a pressurization pipeline is sequentially provided with a gas compressor and an electromagnetic valve, the gas compressor is driven by the high-speed motor, the input end of the pressurization pipeline is connected with the gas inlet pipe, the output end of the pressurization pipeline is connected with the gas entering pipe, and the engine is provided with a crankshaft rotating speed sensor. The problem that transient response is insufficient in the cold-start stage of the engine is solved through waste heat of secondary waste gas exhausted by the engine.

The invention relates to a small-range magnetic-conductive harmonic magnetic gear pair of an axial planar magnetic field, which can be widely applied to the industrial transmission fields of wind power generation, electric vehicles, ship driving and the like and is characterized in that the magnetic-conductive harmonic magnetic gear pair comprises a permanent-magnet stator plate with 2ps stator permanent magnets 2, a permanent-magnet rotor plate with 2pr rotor permanent magnets 6 and a magnetic-conductive wave rotor plate 3 of which the number of projecting-pole is Zb; the numbers of pole pairs ps and pr are positive integer pairs which are mutually relatively prime to form the low polar differential with a fixed difference; the permanent-magnet stator plate, the permanent-magnet rotor plate and the projecting-pole magnetic-conductive wave rotor plate 3 are sequentially coaxially distributed in the axial direction and are coupled with one another through an axial planar gas gap magnetic field, and mutually coupled in the projecting-pole straight shaft area of the projecting-pole magnetic-conductive wave rotor plate rotating at a high speed according to the principle that small-range heteropolar magnetic fields are mutually attracted, so as to drive the small-range magnetic gear pair to rotate at a low speed, so that the power variable-speed and variable-torque transmission is free of mechanical touch and friction.

The invention provides a semi joint point judgment method of a hydraulic automatic transmission clutch. The method includes the steps that when a gear shifting requirement is detected, oil is inflated into a clutch with large pressure P1, and the actual clutch pressure and the turbine rotating speed change rate values at all moments are recorded; when the actual clutch pressure slowly rises along with time, the clutch pressure is reduced to P2, and oil inflation is continuously carried out; when the actual oil pressure reaches the preset scale value of P2, the P2 is gradually increased with delta P, and when the turbine rotating speed change rate becomes a negative value, the clutch pressure at the time is recorded and is semi joint point pressure. The invention further provides a semi joint point judgment system of the hydraulic automatic transmission clutch. By means of the semi joint point judgment method of the hydraulic automatic transmission clutch, quick and accurate pressure response in the clutch oil inflation process can be achieved, and impact caused by clutch pressure overshooting can be avoided.

The invention discloses an electronic-control anti-backlash gear pair. The electronic-control anti-backlash gear pair comprises a first gear, a second gear and a third gear. The second gear and the third gear are coaxial and parallel and are meshed with the first gear, and the freedom degree of relative rotation in the circumferential direction exists between the second gear and the third gear. The electronic-control anti-backlash gear pair further comprises an electronic-control anti-backlash system composed of an electronic driving block and a control unit, wherein the electronic driving block is used for driving the second gear and the third gear to relatively rotate to eliminate meshed backlash between the second gear and the first gear and between the third gear and the first gear during electronic deformation. According to the electronic-control anti-backlash gear pair, when the backlash needs to be adjusted, electronic deformation materials are electrified to be deformed, a double gear formed by the second gear and the third gear relatively rotates to eliminate the backlash between the second gear and the first gear meshed with the second gear and between the third gear and the first gear meshed with the third gear, the gear backlash and the return difference can be accordingly eliminated or reduced in real time, cost is low, the structure is simple, accessory equipment such as a motor is not needed, the occupied space is small, driving energy is reduced, the transmission error during direction changing is reduced, and operation and control are simpler and more convenient; as the original mode that the backlash is eliminated through mechanical force of a power source is not adopted, controllability and accuracy are high, and the electronic-control anti-backlash gear pair is suitable for occasions with the requirements for the high accuracy.