74 results about "Linear coupling" patented technology

A superconducting quantum interference devices (SQUID) comprises a superconducting inductive loop with at least two Josephson junction, whereby a magnetic flux coupled into the inductive loop produces a modulated response up through radio frequencies. Series and parallel arrays of SQUIDs can increase the dynamic range, output, and linearity, while maintaining bandwidth. Several approaches to achieving a linear triangle-wave transfer function are presented, including harmonic superposition of SQUID cells, differential serial arrays with magnetic frustration, and a novel bi-SQUID cell comprised of a nonlinear Josephson inductance shunting the linear coupling inductance. Total harmonic distortion of less than −120 dB can be achieved in optimum cases.

In a power device 1 having a speed reducer 3 and a spring member 4 having elastic characteristics to a power transmission system between an actuator 2 and a driven element 5, an operation target of the actuator 2 is determined according to a linear coupling value of values that are obtained by passing through low-pass filters, a deviation Δω12 between an estimated value ω1_e of a displacement velocity of an input unit 4a of the spring member 4 and an estimated value ω2_e of a displacement velocity of the driven element 5, and a deviation Δθdef between a measured value θdef_s of a deviation difference between the input unit 4a of the spring member 4 and the driven element 5, and a target value θdef_cmd of the displacement difference corresponding to a target driving force τref of the driven element 5.

A base station apparatus is provided for adaptively controlling a maximal accommodation channel number per unit area (for example, the coverage area of a cell or sector) in accordance with a traffic quantity without relying upon detachment of a mobile base station and installation of a repeater. Upon inputting of a plurality of baseband signals of a user channel-multiplexed channel group, linear coupling is performed by a weight which is different per area that outputs it, thereby enabling control of the channel density. Additionally, a per-group available channel number is constantly monitored to control the weight while using threshold judgment for the available channel number as a trigger, thus achieving situation-sensitive prompt handleability.

The invention discloses a method for evaluating the vortex-induced vibration of a deep-sea riser under an internal and external flow effect. The method includes the steps of firstly, building a Cartesian coordinate system, and considering additional load centrifugal force and Coriolis force generated when oil and gas in working state pass a bent pipeline to build a riser vortex-induced vibration equation comprising a pipeline internal flow speed term and Coriolis force; secondly, considering the riser structure and a fluid linear coupling term to simulate vortex-induced vibration acting forceon the riser; thirdly, using Hermit interpolation function discrete to obtain a matrix equation set; fourthly, using a Newark-beta method to perform step-by-step integration on the matrix equation setto obtain the displacement, speed and acceleration of the riser at the moment t1, and using the displacement, speed and acceleration of the riser at the moment t1 to obtain the displacement, speed and acceleration of the riser at each moment. By the method, the vortex-induced vibration of the deep-sea riser under the internal and external flow effect can be evaluated.

The present invention relates to a liquid crystal device driven by a linear coupling, such as ferroelectric and/or flexoelectric coupling, between an inhomogenous in-plane electric field generated by an electrode pattern over a first sub-volume of the bulk layer adjacent to said electrode pattern and liquid crystals in a polarized state comprised in said first sub-volume and/or in an optional alignment layer applied on said electrode pattern said polarization being stronger than any possible similar liquid crystal polarization of the bulk layer outside said first sub-volume, said alignment layer, and/or a second sub-volume of the bulk layer adjacent the inner surface of the other substrate, or an optional second alignment layer or an optional electrode pattern applied thereon.

A curtain airbag includes a curtain airbag main body and a tie panel. The tie panel is arranged on an opposite-interior surface of the curtain airbag main body and is connected to the curtain airbag main body at upper and lower portions of the tie panel. The curtain airbag main body includes first and second panels. At an overlapping area of the curtain main body and the tie panel, the first and second panels are coupled with each other by linear coupling portions which are radially extend toward four directions so as to form four inflation portions. A communication portion communicates two of the four inflation portions with each other. When the curtain airbag main body is inflated, a space is formed between the communication portion and the tie panel.

The present invention is a light-emitting device which is provided with a phosphor layer containing a blue phosphor, wherein the phosphor layer includes an aluminate phosphor, as the blue phosphor, that contains Ba, Sr, Eu, Mg, Al and O as constituting elements at an atom-number ratio Ba:Sr:Eu:Mg:Al:O=p:q:r:1:w:17 wherein 0.70≦p≦0.95, 0≦q≦0.15, 0.05≦r≦0.20, p+q+r≧1, and 9.8≦w≦10.5 are satisfied, and a value of a linear coupling function s represented by a formula:

s=−11622+2043.07L_a+199.24L₁−116.91L₂

is 1 or less, when a lattice constant is L_a(Å), an interatomic distance between Al(2) and O(5) is L₁(Å), and an interatomic distance between Al(1) and O(4) is L₂(Å), which are obtained by an X-ray crystal structure analysis assuming that the aluminate phosphor belongs to a space group P6₃/mmc.

A floating connector is provides that enables impedance matching in the entire contact without hindrance of the movement of a movable housing. The floating connector includes a contact, a movable housing, a fixed housing, and an impedance adjusting member. The contact includes a contact portion to be mated with a mating contact, a board connecting portion to be connected to a circuit board, and a flexible coupling portion that is flexible and that couples the contact portion and the board connecting portion. The movable housing receives the contact portion of the contact therein, while the fixed housing secures the board connecting portion of the contact thereto. In addition, the flexible coupling portion includes a first curved portion, a second curved portion, and a linear coupling portion. The second curved portion bends in a reversed direction from a direction that the first curved portion bends, while the linear coupling portion connects the first curved portion and the second curved portion. The flexible coupling portion is formed in such a way to have an S-shape. The impedance adjusting member composed of dielectrics is arranged on the coupling portion.

The invention discloses a hidden multi-attractor generating circuit based on a non-equilibrium point memristive system realized by replacing a three-dimensional self-excited oscillation system with a voltage-controlled memristor to realize the linear coupling resistance at the input end of the integration circuit, including two parts: The voltage-controlled memristor equivalent realizes the circuit a and the three-dimensional self-excited oscillation system b; where the same ports of the circuit a and the circuit b are connected in sequence, the realized memristive system can present periodic limit cycles, quasi-periodic limit cycles, and chaotic attractors and hidden oscillation phenomena such as coexisting attractors. The circuit system is easy for numerical simulation, circuit simulation and experimental observation, and plays a great role in promoting the research and development of hidden multi-attractors.

Disclosed is a spatiotemporal chaos double-coupling drive system which improves the capability of resisting the error drive signal of the spatiotemporal chaos system. The technical proposal is that the spatiotemporal chaos double-coupling drive system comprises a transmitter spatiotemporal chaos drive system and a receiver spatiotemporal chaos drive system; wherein, the transmitter chaos drive system comprises two chaos systems which are in linear coupling with each other; the system functions are respectively y=f1(x) and y=f2(x); The system functions output the sequences {x1(n)} and {x2(n)}; the outputted sequence {x2(n)} of the second chaos system is used as the drive sequence of the transmitter spatiotemporal chaos system; the receiver spatiotemporal chaos drive system comprises two chaos systems which are separated from each other; the system functions of the two chaos systems are y=f1(x) and y=f2(x) which are the same as the system functions of the transmitter chaos system; the receiver chaos systems are respectively coupled with the sequences {x`1(n)} and {x`2(n)} which are transmitted through the channel to output the sequences {x``1(n)} and {x``2(n)}. The spatiotemporal chaos double-coupling drive system also provides the spatiotemporal chaos double-coupling drive system with error code detection and the processing method.

The invention relates to a harmonic source coupling parameter identification method adopting linear relation clustering, and the method comprises the following steps: S1, carrying out the per-unit processing of harmonic voltage and harmonic current data according to the short-circuit capacity of a system and reference voltage, and carrying out the dimension reduction of the per-unit data through employing PCA; s2, determining a clustering number according to the sum of squares of the errors; s3, searching an initial clustering center by adopting a particle swarm evolution algorithm; s4, inputting the clustering number and the initial clustering center intoa K- means clustering algorithm to carry out clustering, and identifying the linear coupling parameters of the harmonic source. According to the method, the time-varying volt-ampere characteristic of the harmonic source can be accurately reflected from the harmonic monitoring data, and the adaptability to the operation scene change of a harmonic user is stronger, so that the parameter identification of the harmonic source is more practical.

The invention discloses a hybrid microgrid optimization operation method considering harmonic and voltage imbalance constraints. The method comprises steps that S1, a hybrid microgrid optimization operation model is established, the lowest operation cost is taken as an objective function, and the following constraint conditions of power balance constraint, node voltage constraint, energy storage system operation constraint, harmonic constraint and three-phase imbalance constraint are included; S2, the iterative microgrid three-phase load flow calculation method is adopted to solve the hybrid microgrid optimization operation model, so a fundamental voltage, a fundamental current, a harmonic current and a harmonic voltage, meeting the target function, of each node for optimization operationare obtained; based on the iterative microgrid three-phase load flow calculation method, on the basis of the three-phase fundamental wave load flow, the three-phase harmonic wave load flow of a microgrid is calculated through a linear coupling equation of the harmonic wave current and the fundamental wave voltage. The method is advantaged in that on the premise of considering the safety constraints, optimal operation of the comprehensive cost is realized while the load requirement is met.

The invention discloses a direct force and aerodynamic force composite control numerical simulation method based on CFD and RBD coupling. According to the method, a flow control equation and a rigid body motion equation are solved through coupling, the conditions of an aerodynamic rudder deflection angle and a transverse jet flow outlet are changed in real time according to flight control law closed-loop feedback, and numerical simulation of the direct force and aerodynamic force composite control process is achieved. According to the numerical simulation method, the complex nonlinear couplingcharacteristics between nonlinear aerodynamic force and motion and between transverse jet flows can be fully considered, so the direct force and aerodynamic force composite control process is accurately simulated, and the numerical simulation method has the advantages of being high in simulation reliability and high in calculation efficiency.

The invention is directed in various aspects to a compression fixation system that includes coupling components and locking assemblies for connecting two or more separate elements in a fixed arrangement. For example, the system is useful for connecting and compressing two or more elements selected from bones and bone fragments. The system includes a substantially linear coupling component, such as, for example, a Kirschner Wire (“K-Wire”) and locking assembly elements that engage with the coupling component in a coaxial orientation. The coupling component includes at least a linear portion and an anchor portion, the anchor portion configured to be fixed within or adjacent to a first one of the elements to be connected and the linear portion configured to be fixed adjacent to a second one of the elements to be connected, where the locking assembly is attached coaxially with and locked against the second element to achieve compression and fixation.

The invention provides a Kalman filtering method under the condition of an unknown process noise covariance matrix Q. The method specifically comprises the steps of: 1, judging whether a system model satisfies a preset condition, going to a step two if the system model satisfies the preset condition, and stopping the method if the system model does not satisfy the preset condition; 2, establishing a system generalized output matrix E; 3, utilizing the matrix E determine a coupled vector [delta]i output by a system; 4, establishing linear coupling output by the system according to the coupled vector [delta]I, based on the linear coupling, estimating the process noise covariance matrix Q by utilizing a law of large numbers, and recording an estimated result as Q<->; and 5, taking the real-time estimated result Q<-> of the process noise covariance matrix into a standard Kalman filter, and obtaining a filtering result. According to the invention, the Kalman filtering under the condition of the unknown process noise covariance matrix Q is realized.

The invention relates to the technical field of numerical control machining and control and provides an X-C direct driven grinding profile error non-linear coupling control system and method. The system comprises a CNC interpolator, an X axis motor control unit, an X axis motor driving unit, an X axis linear motor and an X axis linear grating which are sequentially coupled, a C axis motor control unit, a C axis motor driving unit, a C axis moment motor and a C axis round grating which are sequentially coupled as well as a non-linear coupling controller; the non-linear coupling unit obtains the tracking error of each axis according to the command position and the fed position result of each axis, a profile error is obtained after coupling calculation, and then a compensation quantity is distributed to each axis motor driving unit according to the coupling gain of each axis. The profile error can be fast calculated according to the machining features in the X-C grinding machining of a planar curved profile part, a compensation coefficient can be provided and the profile machining precision of the X-C direct driven flat grinding table is effectively improved.

The invention discloses a broadband waveguide power divider. The broadband waveguide power divider comprises a lower layer of radiating waveguide; an upper layer of waveguide comprises a coupling waveguide and a power dividing waveguide; the radiation waveguide comprises a radiating waveguide wall and a plurality of isolated radiating waveguide cavities; the coupling waveguide comprises a coupling waveguide wall, and a plurality of isolated coupling waveguide cavities, coupling isolation blocks and secondary power distribution blocks; the power dividing waveguide comprises a power dividing waveguide wall, a trunk waveguide cavity, a branch waveguide cavity, a primary power distribution block, a primary impedance matching block and a secondary impedance matching block; the overlapping part of upper and lower layers of waveguide walls is called a public wall of the upper layer and the lower layer, a plurality of linear coupling slots are formed in the overlapping part, the arrangement directions of the linear coupling slots are the same as those of the radiating waveguide cavities and are the same as the linear directions of the linear coupling slots; and the linear coupling slots overlap along a virtual center line of the linear direction. Compared with an existing waveguide power divider, the broadband waveguide power divider has the advantages that original narrow-band inclined coupling slots of a series structure are replaced with broadband horizontal linear coupling slots of a parallel structure, and the width of a working band is expanded to over 20% from below 10%, that is to say, the bandwidth is improved by more than one time.

The invention discloses a main resonance control method of a flexible mechanical arm. The method mainly comprises the steps that transverse bending deformation of the flexible mechanical arm is discretized, and a deformation equation of the flexible mechanical arm is obtained; a rigidity feedback coefficient, a damping feedback coefficient and a nonlinear coupling feedback coefficient of a main resonance vibration absorber are introduced, and a vibration absorber control signal model is constructed; a Kane method is utilized for building a flexible mechanical arm vibration control model for installing the main resonance vibration absorber; a finite element modal simulation method is adopted for researching the influence of vibration absorber installation on the vibration characteristics of the flexible mechanical arm; a multi-scale method is applied for solving an approximate analytical solution of the equation, and a single-modal solution and a double-modal solution of vibration system steady-state response are obtained; and finally, under the main resonance condition of the flexible mechanical arm, on the basis of the saturation principle, the main resonance vibration absorber is utilized for controlling main resonance of the flexible mechanical arm, and therefore the modal amplitude of the controlled mode of the flexible mechanical arm is restrained.