102results about How to "Extended stabilization time" patented technology

A load driving circuit for a load having a parasitic capacitance associated therewith is provided. The load being current programmed. The driving circuit has a data line having a voltage controlling the load, a feedback loop having a lowpass filter for monitoring the voltage of the data line; and a current source for providing a current to the data line; the current source being controlled by a signal line and an output from the lowpass filter.

A reconfigurable circuit (10) includes an integrator (30) having switches (SW1-6) for selectively coupling input capacitors (C0,1,2,3,6,7) and integrating capacitors (C4,5) to terminals of the integrator (30) for operation of a hybrid delta-sigma/SAR ADC (400) so as to create a reference voltage value (Vref) equal to the sum of a first voltage (ΔVbe) and a second voltage (Vbe). A first integration is performed to reduce the integrator output voltage swing. A residue (Vresidue) of the integrator is multiplied by 2. Then the second voltage (Vbe) is integrated in a first direction if a comparator (22) coupled to the integrator changes state or in an opposite direction if the comparator does not change state. The first voltage (ΔVbe) is integrated in a direction that causes the integrator output voltage (Vout) to equal either 2×Vresidue−Vref or 2×Vresidue+Vref.

An aggregate material separating device includes a frame with a shaker mechanism. A trough is disposed on the frame and coupled to the shaker mechanism by a shaker spring. A hopper is disposed at an end of the trough and can receive a load of aggregate material. A hopper wash line is disposed adjacent the loading hopper to irrigate the aggregate material in the hopper forming a slurry. A brush and a backwash spigot form a standing wave in the trough to slow slurry movement from through the trough in order to provide additional settling time for the slurry. A mineral separation bed is disposed along a bottom and side of the trough. The mineral separation bed has a plurality of substantially longitudinal riffles that can be sized, shaped and oriented to capture minerals of a predetermined specific gravity from the slurry as the shaker shakes the trough.

The invention discloses an ionic-type foam concrete foaming agent and a preparation method thereof, belonging to the technical field of building chemical materials. The ionic-type foam concrete foaming agent is prepared from the following components in parts by weight: 1.5-3 parts of polydimethyldiallylammonium chloride, 0.4-1.2 parts of zwitterionic surfactant, 5-10 parts of anionic surfactant, 0.2-1 part of thickening agent and 70-80 parts of water. The ionic-type foam concrete foaming agent prepared by the method has the advantages that the raw materials are easy and convenient to obtain, the cost is relatively low, the foam stability is high, and the quality guarantee period of the foaming agent is long.

An infrared sensor includes a photodiode receiving an infrared signal. A first amplifier is connected to the photodiode. A second amplifier is connected to the first amplifier. A DC servo is connected in a feedback loop between the output of the second amplifier and the positive side of the first amplifier. An analog-to-digital signal converter is connected to the second amplifier. An output driver is connected to the analog-to-digital signal converter. The infrared sensor may receive and retransmit an infrared signal and may be incorporated in an infrared repeater system.

In a positioning apparatus for an actuator, a sliding mode controller for compensating for nonlinear characteristics of a wave gear device of the actuator generates a control input u to a controlled object, based on a position command θ₁* and a state variable x for expressing the controlled object. The controlled object is defined in the following formula.

{dot over (x)}=Ax+Bu+Eθ_l*

The switching surfaces of the sliding mode control system are defined by a variable S expressed in the following formula.

The control input u is the sum of the linear-state feedback control term u_l and the nonlinear control input u_nl

where σ is the switching function, and k is the switching gain.

The invention provides a cascade integrator comb filter and an implementation method thereof. The cascade integrator comb filter if of a composite structure comprising an FIR (Finite Impulse Response) structure and an IIR (Infinite Impulse Response) structure which are connected in series with each other, and comprises a first sub-cascade integrator comb filter of the FIR structure at the front end, and a second sub-cascade integrator comb filter which is located at the rear end, connected in series with the first sub-cascade integrator comb filter and is of an IIR structure. Compared with the prior art, the cascade integrator comb filter is capable of overcoming the defects of the existing single structure (FIR structure or IIR structure) with the advantages thereof, thereby achieving high speed through the change of area; and balance is realized between realization cost and power consumption; and therefore, the optimal performance cost is obtained.

To perform an anti-windup control without interference with a cross current compensating function even in case of voltage saturation.

There is provided a feedback value calculating section to calculate an average of voltage commands V1_cmd, V2_cmd after output limitation, as a feedback value. As a deviation used for an integral calculation of a current control section 6a, 6b, a sum obtained by adding a product to a deviation between a current command value Id_cmd, Iq_cmd and a current detection value Id_det, Iq_det is used. The product is a quantity obtained by multiplying a saturation quantity by a feedback gain Kfb. The saturation quantity is a saturation quantity of an operation quantity limited by a voltage command limiting section 3a, 3b, and the saturation quantity is a deviation or difference between a feedback value V_fb (Vd_fb, Vq_fb) and the voltage command Vd_cmd.

The invention relates to an active magnetic suspension accelerometer with high alignment, high stability and high resolution; the active magnetic suspension accelerometer comprises a short circuit turn angle sensor, a permanent magnetism torquer, a liquid float plus jewel bearing and active magnetic suspension centering, and double-end bellows volume compensation; when an inertia acceleration applies on a floater, a vertical pendulum deflects, the angle sensor senses the deflection angle, a force feedback loop forms a control current, the control current is applied to a permanent magnetism torquer control coil, thus restoring the vertical pendulum back to the zero bit; control current size symbols are matched with inertia acceleration sizes and directions. Said measures can improve the accelerometer precision; the precision of the accelerometer working under the gate state can improve by almost an order of magnitude when compared with a liquid floating integration pendulum accelerometer. The accelerometer with the active magnetic suspension technology is firstly applied in our nation, thus greatly improving the accelerometer stability and dynamic adaptability; the accelerometer canbe applied to an inertia space navigation system.

The invention discloses a chlorinated polyvinylchloride mixing material, which comprises the following components, by weight, 100 parts of a chlorinated polyvinylchloride resin, and 0.5-10 parts of chlorinated polypropylene. According to the present invention, the chlorinated polypropylene is added to the chlorinated polyvinylchloride resin so as to increase a plasticizing performance of the chlorinated polyvinylchloride resin during a processing process, reduce a plasticizing temperature, and improve processability, such that the obtained mixing material has a good demolding performance, and performances of notched impact strength, tensile strength and the like of the product are improved.

The invention provides an improved rotationally stabilized contact lens design and method of designing such a lens which minimizes stabilization time of the lens while maximizing the lens on-eye comfort. The lens and the method of designing the lens utilizes and combines non-circularity and thickness differential aspects resulting in equivalent or minimized stabilization time, ease of insertion and manufacturability as well as maximum comfort that is improved over that of what either aspect can achieve independently.

A fluid processing system can include a tank having a peripheral side wall and a bottom defining an interior cavity. An inner chamber can be located within the interior cavity and spaced apart from the peripheral side wall. The inner chamber can have an open bottom in communication with the interior cavity through which fluid within the interior cavity flows thereby reducing the possibility for fluid with entrained air entering into the interior chamber. A flow path into the interior cavity can be tangential to the tank thereby inducing a cyclonic flow pattern around the inner chamber that can cause particles to migrate toward the peripheral wall and the bottom of the tank. The flow path can include a variable height weir that varies with the liquid level in the interior cavity thereby reducing the formation of entrained air in the fluid in the interior cavity.

The invention relates to a method and system for treating an aqueous stream having a first flow rate and containing solid matter exhibiting first settling properties, the method comprising adding a modifying agent to the aqueous stream at an addition rate sufficient to change the first settling properties of the aqueous stream to obtain a modified aqueous stream having solid matter exhibiting second settling properties different from the first settling properties; taking batchwise samples of the modified aqueous stream to a settling vessel having a volume; determining a settling property of the solid matter of the samples in the settling vessel; and conducting the modified aqueous stream to a separation unit in which solid matter is separated from the modified aqueous stream. The invention provides a convenient way of monitoring and/or controlling aqueous streams conducted for example to purification processes.

The invention discloses a method for improving a phase-locked loop based on an adaptive variable gain for realizing fast response. The method comprises the following steps: sampling a grid three-phase voltage signal, and converting a three-phase voltage into a two-phase voltage (the formula is as shown in the specification) through Clark transform and Park transform; obtaining an open-loop transfer function of the phase-locked loop containing a nonlinear phase discrimination link according to a phase-locked loop (SRF-PLL) nonlinear mathematic model based on a synchronous coordinate system; obtaining the relationship between open loop cut-off frequency (the formula is as shown in the specification) and an input deviation (the formula is as shown in the specification) through the transfer function, and constructing a variable gain function containing an amplitude (the formula is as shown in the specification), a nonlinear system deviation (the formula is as shown in the specification) and linear system deviation (the formula is as shown in the specification) to reduce the nonlinearity of the system; reforming the traditional PI controller through the variable gain function, and designing an adaptive integral gain (the formula is as shown in the specification) to replace the original (the formula is as shown in the specification) so as to obtain an adaptive variable gain phase-locked loop system; and performing time domain analysis on a closed loop equivalent linear system to accomplish the integration of system parameters. According to the method disclosed by the invention, the variable gain control is constructed to reduce the degree of nonlinearity of the open-loop system, reduce the coupling relationship between the angular velocity and the angle, shorten the dynamic transition time of the phase-locked loop and performs dynamic response contrastive analysis on the traditional phase-locked loop system and the improved phase-locked loop system by using a simulation platform.

The invention relates to a method for preparing a CO2 catching membrane material with high hydrothermal stability. The method comprises the following steps of: synthesizing ZrO2 sol through a sol-gel method by using zirconium alkoxide as a precursor, and coating on a platy carrier to obtain a ZrO2 membrane. The H2 permeability of the ZrO2 gas separation membrane prepared by the method is 5*10<-8>mol.m<-2>.s<-1>.pa<-1>, and H2/CO2 selectivity can reach 15 which is far more than an H2/CO2 ideal separation factor (4.7) based on a Knudsen diffusion mechanism; the performance of the membrane is basically unchanged after the membrane is treated at the temperature of 200 DEG C under the water vapor partial pressure of 100kPa for 400 hours; and by prolonging treatment time to 1,250 hours, the H2 permeability is reduced to a certain extent, but the H2/CO2 ideal separation factor is increased to 33, which prove that the membrane still has a separation effect, so that a foundation is laid for gas separation of the ZrO2 gas separation membrane in water vapor environment.

A pharmaceutical solution of taxanes, its preparation method, a composition comprising said solution and its pharmaceutical combination package are disclosed. Said pharmaceutical solution comprises taxanes, a pH regulator and a solvent, wherein the pH regulator is a water-soluble acid.