36results about How to "Has non-linear properties" patented technology

Provided is a switch reluctance motor memory sensor model modeling method. A switch reluctance motor memory sensor circuit model is formed by two current conveyors AD844, an operational amplifier AD826, a memristor, a capacitor and three resistors. The modeling method makes a basis for circuit hardware modeling of a switch reluctance motor system model, is beneficial for match direct simulation of a switch reluctance motor system, enables physical phenomena in a simulation system to be similar with an actual switch reluctance motor system, and has important theoretical value and wide application prospects. The modeling method is simple, can improve static and dynamic properties of a system, and achieves real-time simulation and real-time control of the switch reluctance motor system.

The invention discloses a miniaturized LED integrated array device and a preparation method thereof, and relates to the technical field of luminescence display. With the device and method, the problem of limited use due to bending incapability of a conventional planar LED micro-display device can be solved. The working process of the miniaturized LED integrated array device is as follows: current is injected from an upper electrode and flows out of a lower electrode, so that an electric field is formed in the device, and positive and negative carriers emit light at a luminescent layer in a composite manner; a part of the light is oriented upwards, passes through an euphotic layer and comes out of a micro-lens; and a part of the light is oriented downwards, reaches a reflection layer, is reflected by the reflection layer, passes through the luminescent layer and the euphotic layer, and then comes out of the micro-lens. The luminescent device is based on the luminescence principle of composite luminescence of the carriers in a p-n structure and has the non-linear characteristics of the current and voltage of a diode so that the luminescent brightness also has the non-linear characteristics according to the size of the injected current. The brightness of pixel elements is controlled through a circuit so that luminescence display is realized.

The invention provides an under-actuated release control method based on a nonlinear space tether system. The method comprises the following steps: 1, a dumbbell model is adopted, system dynamics differential equations are built according to a second kind Lagrange equation, and a dimensionless form is introduced in the differential equations; 2, based on a normal form expression for the above dynamics differential equations, expected values for a system in-plane pitching angle and an out-plane rolling angle are set, and the balance position of the system in the release process is obtained; 3, starting from the balance position of the system, a tether length change control law for realizing tether release is deduced and obtained; and 4, the range for the expected in-plane pitching angle is determined to ensure the tether release process to be asymptotically stable under effects of the control law. Numerical simulations show that the space tether can be released asymptotically stably under effects of the release control method provided by the invention, and an attractor capable of covering the balance point and an attraction domain with enough thickness can be found out.

The invention discloses a piezoelectric power generation type damping-adjustable hydro-pneumatic suspension, belongs to an oil-gas separation type hydro-pneumatic suspension and belongs to the field of automobile devices. The piezoelectric power generation type damping-adjustable hydro-pneumatic suspension is composed of a suspension cylinder (12), subassemblies of the suspension cylinder, an energy accumulator (1) and subassemblies of the energy accumulator and is characterized in that the suspension cylinder (12) and the energy accumulator (1) are connected through a hydraulic valve group (7), the hydraulic valve group (7) is composed of an electromagnetic switching valve (10), throttling valves (8) and a one-way valve (9), one of the throttling valves (8) is connected with the one-way valve (9) and then is in parallel connection with the other throttling valve (8) before being connected with the electromagnetic switching valve (10), a piston rod (14) is installed inside the suspension cylinder (12), the tail end of the piston rod (14) is connected with a main piston (13), piezoelectric materials (3) and buffer blocks (2) are at least arranged on the working face of the main piston (13) or at the top of an inner cavity of the suspension cylinder (12), a floating piston (4) is arranged inside the energy accumulator (1), the piezoelectric materials (3) and the buffer blocks (2) are arranged on at least one of the upper and lower surfaces of the floating piston (4), and holes are formed in upper and lower ends of the energy accumulator (1) respectively and connected with a charging and discharging oil valve hole (18) and a charging and discharging gas valve hole (17) respectively. By the aid of the hydro-pneumatic suspension, vibration energy can be fully converted into electric energy which is supplied to electronic devices of vehicles for usage; and the hydro-pneumatic suspension is simple, energy-saving and environmentally friendly and has a natural vibration attenuation effect on the vehicles.

The invention discloses a minitype LED array chip, which relates to the technical field of LED, and solves the problems existing in a conventional manufactured LED micro display that the sizes of lighting units are hard to be small, the resolution ratio is caused to be limited, and the requirements cannot be adapted. The working process of the minitype LED array chip is as follows: current is injected from upper electrodes and flows out from lower electrodes, and an electric field is formed in a device to allow current carriers to illuminate in recombination in luminous layers. According to the invention, partial light passes through euphotic layers upwards, and is irradiated out through micro lenses, and partial light reaches to reflecting layers downwards, is reflected by the reflecting layers, and is irradiated from the micro lenses after penetrating the luminous layers and euphotic layers. As the lighting principle of an illuminator is illuminating in recombination of the current carriers a p-n junction; the principle has the nonlinear propertys of current and voltage of a diode; the luminance has the nonlinear property with the size of the injection current. The chip controls the luminance of pixel elements through a circuit to realize the luminous display.

The invention discloses a flexible LED array device for micro-displaying and lighting and a manufacture method, relates to the technical field of luminescence display, and solves the problem that a conventional plane surface type LED micro display piece is restricted when in use due to inflexibility. The operation processes of the flexibly connected LED device are that current is injected from upper electrodes and outflows from lower electrodes, an electric field is formed in the device, the positive and negative current carriers carry out recombination luminescence on luminous layers, part light passes through photic layers upwards, and is outshot from micro lens, and part light reach reflective layers downwards, is reflected by the reflective layers, penetrates through the luminous layers and the photic layers, and is outshot from the micro lens. As the luminous principle of the luminous device is the current carrier compound luminescence in p-n junction, the nonlinear characteristic of current voltage of a diode is provided; the luminous brightness is provided with the nonlinear characteristic along with the intensity of the injection current. Through the control of the brightness and the darkness of a pixel element by the circuit, the luminous display is realized.

The invention discloses a sliding mode control method used for a two-stage DC / DC (direct current / direct current) converter. A BUCK circuit is the front stage of the two-stage DC / DC converter, and a half-bridge circuit is the back stage of the DC / DC converter. The sliding mode control method includes the steps of establishing a state model of the two-stage DC / DC circuit; constructing a sliding mode surface function S according to the state model; obtaining equivalent control input ueq according to the S; obtaining a control signal vc of a fixed-frequency PWM (pulse-width modulation) controller and a fixed frequency sawtooth signal Vramp according to the ueq so as to achieve sliding mode controlling. The sliding mode control method is used for the two-stage DC / DC converter with the BUCK circuit serving as the front stage and the half-bridge circuit serving as the back stage and is high in controlling stability, the DC / DC converter is good in nonlinear characteristics, and roughness of parameters can be improved in presence of external disturbance; the sliding mode control method is also applicable to constant-frequency two-stage DC / DC converters and good in nonlinear control effect.

The invention discloses a manual pressing device based on worms, worm wheels and crank connecting rod transmissions. The manual pressing device comprises a rotary shaft, wherein at least two worms are fixedly arranged on the rotary shaft, the worm wheels meshed with the worms are arranged under the corresponding worms, the crank connecting rod transmissions are arranged on the worm wheels, and the tail ends of the crank connecting rod transmissions are connected to the same press block. The symmetrical synchronous multi-point driving is achieved, the manual pressing device is compact in structure, simple and convenient to use and rapid in positioning and pressing, the synchronous multi-point or multi-station pressing can be achieved according to the demands of workpieces, and accordingly labor productivity and product quality are improved.

The invention relates to a broadband low-noise analog front end circuit for an optical fiber instant fracture detection system. The circuit comprises a photodiode, a transimpedance amplifier module, a gain control module, a bandwidth control module and a level movement module. The system also is equipped with an isolation module which is connected with the transimpedance amplifier module, the gain control module and the bandwidth control module. Compared with the prior art, the circuit has the advantages of large dynamic range, simple control, fast response speed, low noise and satisfaction of a nanosecond level demand of the optical fiber instant fracture detection system.

The invention discloses an automatic centering and clamping device based on transmission of worm-worm gears and crank connecting rods. The automatic centering and clamping device comprises at least two worm gears, wherein each worm gear is hinged to a crank connecting rod; the tail ends of the crank connecting rods are fixedly connected with pressure heads; the pressure heads are used for driving the crank connecting rods through rotation of the worm gears to drive the pressure heads to clamp a workpiece; each worm gear is driven by a worm which is meshed with the worm gear respectively; each worm is provided with a driven gear; each driven gear is meshed on the same driving gear. According to the automatic centering and clamping device, the worm-worm gears and the crank connecting rod mechanisms are arranged symmetrically, and the output force generated by the pressure heads is equal in magnitude and reverse in directions, so that automatic centering and alignment are realized, the fixture adjusting time can be shortened, the workpiece machining efficiency is increased, and the effects of saving labor force, saving time and increasing efficiency are achieved.

The invention discloses a manipulator internal-grab device based on worm-gear and crank-link transmission. The manipulator internal-grab device is characterized by comprising at least two gears; each gear is hinged with a crank link, a grab press head is fixedly connected to the tail end of each crank link and drives the same under rotation of the corresponding gear so as to support a workpiece tightly, and each gear is driven by one worm meshing with the same. Through second series-connection boosting of the worm-gear and crank-link transmission, high boost ratio is acquired, boosting effect is obvious, labor productivity and product quality can be improved and labor intensity of workers can be reduced. According to the nonlinear characteristic between the output force and the output displacement of a crank-link mechanism, the grab press heads are fed rapidly on the condition of large pressure angle, and the grab force is increased rapidly on the condition of small pressure angle.

The invention discloses an image processing method and an image processing device based on a neural network in order to solve the problem that the accuracy of image processing is low in the prior art. The method comprises the following steps: receiving a to-be-processed image; and processing the to-be-processed image by use of a neural network containing at least one transformation layer which is a factor decomposition bilinear layer to get a processing result, wherein the output result of each neuron in the factor decomposition bilinear layer is the sum of the linear term of the input feature vectors of the neuron and the factor decomposition quadratic term characterizing the correlation between the input feature vectors of the neuron. According to the technical scheme, the factor decomposition quadratic term characterizing the correlation between the input feature vectors of each neuron is added to the output result of the neuron, so that the expression ability of the neural network is improved. Through image processing using the neural network with strong expression ability, the accuracy of image processing is improved.

The invention discloses a seat nonlinear suspension integrating a height and weight parameter adjusting function. The seat nonlinear suspension comprises a shear type suspension assembly and an elastic assembly; the shear type suspension assembly achieves guiding of movement in the vertical direction through a shear rod mechanism and a sliding way roller; the elastic assembly comprises two horizontal springs, an adjusting rod, a weight adjusting plate, two torsion bars which are symmetrically arranged up and down, a main sliding block, an auxiliary sliding block, two rollers which are installed on the two torsion bars respectively, a first torsion bar fixing steel belt, a second torsion bar fixing belt, an inner spline sleeve, a key and a large nut; semi-cylindrical structures are arrangedon the upper face and the lower face of the auxiliary sliding block. According to the invention, the functions of weight adjustment and height adjustment are integrated in the nonlinear seat suspension based on a shear type connecting rod, so that the complexity of an adjusting mechanism is reduced, the number of parts is small, the cost is low, and the suspension has nonlinear characteristics and good low-frequency vibration isolation capability.

The invention discloses a front suspension oil cylinder for a mining vehicle. The front suspension oil cylinder is arranged between an upper vehicle rack and a lower vehicle rack, and comprises a cylinder body, a cylinder bottom fixed at the tail end of the cylinder body, a piston rod matched with the cylinder body inner wall liquid seal in a sliding manner and a piston, wherein a ring sleeve of the piston is fixed at the tail end of the piston rod; the piston rod is provided with an inner chamber of which one end is closed and communicated with a rodless cylinder cavity of the cylinder body; and a non-return valve and a damping hole for communication of the inner chamber and a rod cylinder cavity of the cylinder body are radially formed at the piston rod near to the piston. According to the invention, in the vehicle moving process, the oil cylinder can repeatedly move up and down by the incentive effect of the road surface to adapt to the conditions of the road surface, so as to achieve the functions of vibration damping and support; and by utilizing the non-return valve and the damping hole formed on the piston rod in the moving process, alternate change of damping in size can be realized to achieve the purpose of guaranteeing the motion stability of the vehicle.

The invention belongs to the technical field of intelligent structure controlling, and particularly relates to an intelligent marine upright column system based on a PID controlling method. The intelligent marine upright column system comprises a piezoelectric accelerometer sensor, a charge amplifier, an upright column structure, a magnetorheological damper and a PID controlling processing system,the piezoelectric accelerometer sensor is used for obtaining a vibration response signal, and the charge amplifier is used for filtering waves and amplifying signals; the PID controlling processing system is used for generating a controlling signal after comparing a collected response signal with target requirements, so that the coil current size of the magnetorheological damper is controlled, the damping force size of the magnetorheological damper is changed accordingly, and active and intelligent vibration isolation is achieved; and the PID controlling processing system can achieve modification of controlling objectives and controlling parameters of the PID controlling processing system through a laptop, the fact that the vibration response of the plate frame structures at both ends ofan upright column is controlled through the intelligent marine upright column system based on the PID controlling method is achieved, and the multiple functions such as operation state displaying andparameter inputting are achieved.

A wheel hub-driven electric vehicle air suspension system with multi-layer additional air chambers, mainly including four air springs with multi-layer additional air chambers in two groups including front suspension system and rear suspension system; each air spring contains A main air chamber and an additional air chamber; the main air chamber is a membrane-type flexible rubber airbag structure, and the additional air chamber is a rigid multi-layer structure; the main air chamber and the additional air chamber are connected by a gas pipeline, and an aperture is set on the gas pipeline Adjustable throttling orifice; the controller of each air spring can independently control the throttling orifice and switch valve at the same time; each air spring is equipped with a sensor for measuring the displacement of the piston, and the displacement sensor is connected to the central controller; The controller is respectively connected with the controller of each air spring. The central controller can keep the suspension performance of the vehicle in an ideal state under different working conditions and road conditions through the combination of the opening and closing state of the additional air chamber switch valve and the control of the throttle orifice aperture.

The invention relates to a pseudo-random sequence generator construction method based on a non-degenerate hyperchaotic system, solves the problem of dynamic characteristic degradation of a chaotic system, and can simply and quickly construct the non-degenerate hyperchaotic system. The method comprises the following steps: firstly, constructing an initialization matrix G and a diagonal matrix Sc, decomposing the matrix G through singular value decomposition to generate a coefficient matrix A, further constructing an m-dimensional non-degenerate hyperchaotic system Chaos1, carrying out iterative operation, judging whether the number of iterations reaches Len = 108 or not, if not, carrying out binary quantization processing on an output chaotic sequence, and if yes, carrying out binary quantization processing on the output chaotic sequence; sequentially connecting the m-dimensional quantized binary sequences in series to form a final output pseudo-random binary sequence; and if yes, continuing iteration for multiple times by adopting the m-dimensional non-degenerate hyperchaotic system Chaos1, reconstructing a new initialization matrix G and a diagonal matrix Sc by utilizing corresponding iteration values, then further constructing a new non-degenerate hyperchaotic system Chaos2, continuously constructing a new non-degenerate hyperchaotic system based on the method, and outputting a quantized chaotic pseudo-random binary sequence. The method has the advantages of being high in nonlinear characteristic cracking difficulty, good in randomness, long enough in period, high in balance and the like.

Provided is an insulator which is capable of reducing unusual noises. A first mounting hole (3) for engagement with a vehicle body side is formed in a first section (2), and a second mounting hole (5) for engagement with an exhaust gas pipe side is formed in a second section (4) disposed to be spaced apart from the first section (2). The first section (2) and the second section (4) are coupled to each other by a pair of coupling sections (6). The first section (2) and the second section (4) are adapted such that at least the inner circumferential surfaces of the first mounting hole (3) and the second mounting hole (5) are configured from a rubber-like elastic body having a self-lubricating property. As a result, the self-lubricating property of the inner circumferential surfaces of the first mounting hole (3) and the second mounting hole (5) reduces unusual noises that would be otherwise produced when the first mounting hole (3) or the second mounting hole (5) and a pin are rubbing against each other.

The invention relates to a circular plate type vibration energy collector based on an MFC. The circular plate type vibration energy collector comprises a base (8), a guide column (1) fixed to the base (8), an upper center mass block (3), a lower center mass block (7) and a laminated circular plate, wherein the upper center mass block (3) and the lower center mass block (7) are connected with the guide column (1) and are symmetrically arranged up and down, and the laminated circular plate is arranged between the upper center mass block (3) and the lower center mass block (7). The laminated circular plate comprises an upper circular MFC (4), a lower circular MFC (4) and a brass substrate (6), wherein the upper circular MFC (4) and the lower circular MFC (4) have the same structural size, and the brass substrate (6) is arranged between the two MFCs (4). Compared with the prior art, the invention has the advantages of effectively broadening the response frequency band of the collector, reducing friction generated during vibration, being stable in collection and the like.

The invention discloses an amplitude modulation wireless microphone for a computer. The amplitude modulation wireless microphone comprises a power supply, a switch, a first resistor to a twelfth resistor, a first capacitor to a ninth capacitor, an antenna, a first inductor, a second inductor, a first triode to a fourth triode, a potentiometer and an electret microphone, wherein the second triode, the second inductor, the third inductor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the fourth resistor, the fifth resistor and the seventh resistor form a common-base capacitance three-point oscillator, an oscillation signal transmitted by the common-base capacitance three-point oscillator is used as a carrier signal, an audio signal is used as a modulation signal, and finally an amplitude modulation signal is connected with the antenna through a matching network consisting of the second capacitor, the first inductor and the second resistor and transmitted to the space through the antenna. A be node of the first triode has a nonlinear character, so that the amplitude modulation of the audio signal for the carrier signal can be realized, the interference resistance of the wireless microphone can be improved, the potentiometer is used for adjusting the modulation signal, and the excessive amplitude modulation can be prevented.

The invention discloses a seismic data attribute extraction method based on nuclear relation. The method comprises the steps of 1, selection of a seismic trace; 2, computation of nuclear-related measures; 3, building of a nuclear-related matrix; and 4, computing of seismic trace attribute values. According to the method provided by the invention, the extraction of coherent attributes in seismic attributes can be achieved, the nuclear-related function is introduced, and via the steps of building the nuclear-related matrix and computing the matrix feature value, the extraction of the coherent attributes of seismic data is achieved. The method is convenient to implement, can achieve discontinuity detection on stratum edges, rivers and the like and accurate depiction on geologic features suchas the non-homogeneity and fault of sand bodies; and the technical scheme is easy to implement and strong in operability.