57results about How to "Reach a steady state" patented technology

The invention provides a torque adjusting method of an electric automobile adaptive cruise system, and relates to the field of automobiles. The method includes the steps: calculating desired acceleration speed Vdes (n) by the aid of an adaptive cruise controller; detecting automobile tire pressure Ptir by the aid of a tire pressure sensor; detecting a road gradient Phi by the aid of a tilt angle sensor; detecting weight M of an integrated automobile by the aid of a pressure sensor; detecting actual speed v(n) of a vehicle by a vehicle speed sensor; detecting actual acceleration speed Vact (n)of the vehicle by an acceleration speed sensor; inputting driving environment information by a man-machine interactive system; acquiring a rolling resistance coefficient according to relation functions among the rolling resistance coefficient, a road and tire pressure; implementing front feed adjustment of a standard torque Tfid(n) through a dynamical model; performing correction through adaptivePID feedback to obtain a desired torque Tdes (n); switching maintaining areas to achieve effective switching of driving control and braking control; implementing adaptive cruise control. According tothe method, adjusting time from stabilization to final target acceleration speed is shortened, and stability of the system is improved.

The present invention relates to a resource allocation and task unloading scheme applied in fog computing, which unloads a computing task from a user equipment to a vehicle fog node by utilizing underutilized resources of a nearby vehicle. Through the study of contract theory and matching theory, an effective incentive mechanism and task allocation mechanism is provided. The contract theory-matching theory proposed in this paperis a two-stage optimization problem. In the first stage, this paper proposes an effective incentive mechanism based on contract theory to encourage vehicles to share resources. the expected utility of the base station is maximized by designing contracts for each vehicle type. In the second phase, the task assignment problem is transformed into a bilateral matching problem between the vehicle and the user equipment. The problem is solved by a price-based matching algorithm, which iteratively performs the process of 'applying' and 'raising the price' according tothe dynamic preference list, and finally obtains a stable match between the vehicle and the user.

A device for measuring a fluorescent oil flow friction force field comprises a CCD video camera, an LED light source, a computer, a test wind tunnel and a spraying device, wherein the spraying device is composed of a spraying gun and a high pressure air source which is a nitrogen source, the CCD video camera and the LED light source are respectively installed outside an observation window of the test wind tunnel, the LED light source can irradiate a model testing piece arranged in the test wind tunnel, the CCD video camera can effectively shoot image information of the model testing piece, the LED light source is connected with an external power source through a wire, an information output end of the CCD video camera is connected with a corresponding interface of the computer through a cat6 network line, and a medium inlet of the spraying gun is connected with a medium outlet of the high pressure air source. By means of the device and method for measuring the fluorescent oil flow friction force field, coatings on the surface of a model can be evenly distributed and can reach a stable state as quickly as possible under the function of a flow field, machining links and machining cost of the model are reduced, measurement cost is greatly reduced, and influence on the flow field on the surface of the model by measurement devices is reduced.

A color measurement on printed materials produced by a printing press is performed by at least a first color measuring device installed in the printing press and at least a second color measuring device. A signal is output by the first color measuring device in the printing press when the measured color values registered on the printing materials are located within a predefined tolerance limit for a predefined period and that, after the signal has been output, a color measurement on one of the printed materials thus produced is performed with the second color measuring device.

The invention relates to an improved self-correcting variable parameter fan coil temperature control method and special equipment. The special equipment comprises a coil fan loop, a coil water valve loop, a control panel and a controller, wherein the control panel is internally provided with a temperature setting circuit and a display circuit, the input/output ports of the temperature setting circuit and the display circuit are connected with the I/O ports of the controller directly or by virtue of an RS485 communication interface, the coil fan loop is provided with a direct current brushless fan and a return air temperature sensor, the control input terminal of the direct current brushless fan is connected with one control output terminal of the controller through a serial interface, and the signal output terminal of the return air temperature sensor is connected with one signal input terminal of the controller; and the coil water valve loop is provided with an electric two-way valve, and the control input terminal of the electric two-way valve is connected with two output terminals of the controller. The temperature control equipment disclosed by the invention improves accuracy on fan coil control, has good stability, realizes intelligent regulation management on a fan coil and saves energy.

The present invention discloses a micro gyroscope adaptive high-order super-twist slip form control method. The micro gyroscope adaptive high-order super-twist slip form control method adopts a methodof combining the equivalent slip form control and the super-twist control to design an adaptive high-order super-twist slip form controller and design the adaptive laws of which the parameters are not determined of a micro gyroscope system, and then adopts an Lyapunov function to analyze the stability of the micro gyroscope system, thereby guaranteeing the asymptotic stability of the system. Themethod of the present invention combines the advantages that the high-order super-twist slip form control can effectively suppresses the buffeting, etc., controls to improve the performances of the system, enables the robustness of the micro gyroscope system to the indeterminacy and the external interference to be improved, and guarantees the stability of the system.

The invention provides a fuel-atomizing integrated igniter which comprises an air plasma igniter and a fuel-atomizing jetting component, wherein the air plasma igniter is mainly composed of an inner electrode, a grounding electrode, an insulating medium and a power supply connector; the fuel-atomizing jetting component is mainly composed of a fuel-atomizing component shell and fuel-atomizing components; each of the fuel-atomizing components comprises a swirler shell and a swirler mounted in the swirler shell; the fuel-atomizing component shell is of annular shape; the plurality of fuel-atomizing components are uniformly distributed in the annular fuel-atomizing component shell; the annular fuel-atomizing component shell is provided with a fuel inlet; a fuel filter is arranged on the fuel inlet; the air plasma igniter is located in the annular fuel-atomizing component shell; an air guiding hole is formed on the grounding electrode; and the fuel-atomizing component shell and the grounding electrode are integrally connected through a pressing cover. The fuel-atomizing integrated igniter is applied to the field of thermal energy and power engineering; the generation of the conditions, such as, retrocession of an ignition source, flame blow-out, and the like, caused by horizontal jetting is avoided; and the reliability of ignition is increased.

The invention discloses an electric pulse regression treatment method for an aluminum alloy. The electric pulse regression treatment of a natural aging aluminum alloy material is finished by virtue of an electronic universal testing machine with an insulating chuck due to the match of a pulsed power supply, and the mechanical properties of the treated aluminum alloy material are measured; and by utilizing an electric pulse effect, the time consumption is low, the material temperature rise is slow, the regression treatment effect is controlled by changing the electric pulse parameters, and the material has high process flexibility. The method comprises the following steps: performing solution treatment on the cut single tensile test piece by virtue of heat preservation, quenching in water after discharging, and performing natural aging at room temperature, thereby obtaining an aluminum alloy uniaxial tensile test piece; introducing pulse current into the tensile test piece, setting the electric pulse duration time according to the power supply output capacity and the temperature resistance of the test piece, and monitoring and recording the temperature change conditions by adopting a thermal infrared imager when the electric pulse flows through the tensile test piece. The characteristic of slow material temperature rise completely accords with the aluminum alloy regression treatment standard, and the method has high actual application value.

The invention discloses an inverter output voltage state stabilizing method based on sliding mode control. The method comprises the following steps: step 1, a reference voltage vref is set, an operation model is established according to an inverter circuit, and the difference between an output voltage V and the reference voltage vref is defined as the error signal value s of a sliding mode variable; step 2, a dynamic parameter value Beta is set, wherein s<=Beta sM, s>=Beta sm, and a controller structure is composed of four states S<M><+>, S<m><+>, S<M><-> and S<m><-> and an initial state; step 3, the error signal value s and the derivative thereof S(.) are converged to a sliding mode surface s=0 and S(.)=0 through a control algorithm according to real-time update of the dynamic parameter value; and step 4, the output voltage V=vref+s is output.

The invention provides a novel multifunctional supporting frame capable of adjusting height and angle. The novel multifunctional supporting frame capable of adjusting the height and angle mainly includes an extensible base device, a spiral height adjusting device, an extensible cantilever device and a box body fixing device. The novel multifunctional supporting frame capable of adjusting the height and angle is characterized in that the multifunctional support frame suitable for different heights and angles can be provided by the adjustment of the heights and angles of the extensible cantilever device and the box body fixing device through the spiral height adjusting device under the support of the extensible base device. According to the novel multifunctional supporting frame capable of adjusting the height and angle, the stability of a supporting frame structure is realized by the extensible base device, the adjustment of the height of the extensible cantilever and the box body is realized by the spiral height adjusting device, the adjustment of the extensible state of the box body fixing device is realized by the extensible cantilever device, and the fixing of the box body withdifferent structures and the sizes is realized by the box body fixing device.

The invention discloses an unmanned helicopter lifting platform and relates to an unmanned helicopter landing gear. The lifting platform comprises a bearing face, a pulling rod, a supporting rod and a buffering rod. The bearing face is formed by connecting three bearing nets. Each bearing net is formed by welding reinforcing steel bars and provided with meshes. The bearing nets are rectangular. The non-connection sides of the bearing nets are welded with pipe barrels. The outer diameter of the pulling rod is matched with the inner diameter of each pipe barrel. The pulling rod penetrates through the pipe barrels of the edges of the bearing face and is connected with the buffering rod. The buffering rod is connected with the supporting rod. The unmanned helicopter lifting platform has the advantages of being simple in structure, low in cost, capable of being folded, convenient to carry, small in occupied space, capable of meeting requirements of an unmanned helicopter for taking off and landing under all kinds of terrain environment, and beneficial for popularization and application of the unmanned helicopter.

The invention relates to a rapid oscillation starting system and method for a metal resonator gyroscope. The rapid oscillation starting method is technically characterized by comprising the following steps that: a frequency sweeping module is used for carrying out sweeping frequency of a harmonic oscillator; an analog-to-digital conversion module AD collects an excitation signal and an amplitude detection signal generated by the harmonic oscillator, and then transmits the digital quantity of the excitation signal and the digital quantity of the amplitude detection; signal to an FPGA main control chip. the FPGA main control chip processes the excitation signal and the amplitude detection signal and outputs a new excitation signal; and a digital-to-analog conversion module DA converts the new excitation signal into an analog signal, and the analog excitation signal is filtered by a low-pass filter and then acts on the harmonic oscillator. According to the invention, the design is reasonable, the rapid and stable oscillation starting function of the metal resonant gyroscope under the condition of large-range frequency change can be realized, and the reliability of the gyroscope is improved.

The invention discloses an active filter, comprising an active filtering circuit. The active filter further comprises an adjusting circuit; the adjusting circuit comprises a resistor matching unit, an integral filtering unit and a control signal generation unit, wherein the resistor matching unit comprises an adjustable resistor and a reference negative resistor matched with the adjustable resistor; the integral filtering unit is connected with the resistor matching unit and is used for carrying out integral operation and filtering treatment on current output by the resistor matching unit; and the control signal generation unit is connected with the integral filtering unit and is used for generating a signal output of the integral filtering unit and generating a control signal to adjust a resistance value of the adjustable resistor. The active filter disclosed by the invention can be used for self-adapted adjustment of the active filtering circuit.

The invention discloses a high-performance CMOS voltage reference source with negative feedback. The high-performance CMOS voltage reference source comprises a starting circuit module, a current source module and an active load module which are connected in sequence; the starting circuit module is used for keeping a circuit at a proper working point and ensuring that the circuit can always reach astable state, the current source module is used for generating bias current in direct proportion to electron mobility and the square of the temperature under the condition that no special device is used, and the bias current is relatively small, so that the power consumed by the current is relatively small. According to the invention, the active load module generates output reference voltage withlow voltage linearity and high power supply rejection ratio by introducing negative feedback, and has the advantages of low temperature coefficient, low voltage linearity, high power supply rejectionratio, low power consumption and good process compatibility.

The invention relates to a nanometer material addition agent, which is prepared by adopting the steps: 1) dispersing agent is added into a carbon nano-tube (CNT) and is mixed evenly; the weight content of the mixed dispersing agent can not be lower than 90 percent of the total weight of the dispersing agent and the carbon nano-tube; 2) the carbon nano-tube with dispersing agent is arranged into an ultrasonic wave field for ultrasonic dispersion. The nanometer material addition agent has a better stable electrostatic conductive performance, and the amplitude modulation of the added quantity of other adding components is large, thereby various electrostatic conductive coating with special characteristics can be designed and prepared according to requirement. The nanometer material addition agent adopts CNTs as a conductive function body to prepare electrostatic conductive coating, which embodies the important application of nanotechnology in transforming the traditional industries; furthermore, the electrostatic conductive coating has a more excellent performance, and the nanometer material addition agent is a new approach for the large-scale industrial application of CNTs.

The invention, which belongs to the technical field of electric wire deicing, particularly relates to an electric wire deicing device comprising deicing mechanisms, running mechanisms, a connecting plate and a rotating shaft sleeve. With the design of fifth oscillating bars, the impact forces are applied on the ice on a wire by oscillation of the fifth oscillating bars and the ice is broken by theimpact forces, so that the ice cleaning effect is realized. Meanwhile, the corresponding deicing mechanisms are driven to make rotation by the running mechanisms to drive corresponding three fifth oscillating bars to rotate; and the deicing effect is enhanced by oscillation of the fifth oscillating bars. The ice on the wire becomes solid and thus the deicing difficulty is increased in cold weather. Besides, each fifth oscillating bar in the two deicing mechanisms has different speeds by adjusting and changing the oscillation speeds of all fifth oscillating bars and thus the stress situation of the ice on the wire is changed, so that different impact forces are applied on the ice at the same part of the wire in a circumferential direction and thus the deicing effect is improved.

The invention discloses a control method of clothes treating equipment, and belongs to the technical field of household appliances. The clothes treating equipment is provided with a rotatable washing barrel. The control method comprises a barrel rotating step of driving the washing barrel to rotate at a first rotating speed v1, so that clothes in the washing barrel are tightly attached to the inner side wall of the washing barrel; and a cloth quantity detection step of driving the washing barrel to do accelerated motion and/or decelerated motion to judge the cloth quantity, wherein the first rotating speed v1 is higher than the maximum rotating speed of the washing barrel in the cloth quantity detection step. The barrel rotating step is arranged before the cloth quantity detection step, and the first rotating speed v1 of the washing barrel in the barrel rotating step is higher than the maximum rotating speed of the washing barrel in the cloth quantity detection step; under the centrifugal effect of high-speed rotation, the clothes in the washing barrel are tightly attached to the inner side wall of the washing barrel; the rotation radius of the clothes is close to the radius of the washing barrel, and the rotation radius tends to a stable value; then the cloth quantity detection step is carried out; and the rotational inertia and the clothes mass are approximately linear, and the rotational inertia can accurately reflect the clothes mass.