17results about How to "Compensation effect" patented technology

The invention provides a train cooperative operation prediction control method and system based on a dynamic interval model, and belongs to the technical field of train operation control, and the method comprises the steps: calculating a train minimum tracking interval based on the real-time estimation state information of a train according to a train relative distance braking model; the communication delay time of the train-to-train communication system is considered, an additional safety margin is added on the basis of the minimum tracking interval of the train, and the influence of communication delay on cooperative operation control of the train is compensated; a system state space model is constructed based on the safety margin, and a train optimization control problem is formed based on the control constraint and the control target; and solving a train optimization control problem, obtaining an acceleration sequence for controlling train operation, and acting a first item of the sequence on the train to realize train operation control. According to the invention, while the tracking interval between the trains is effectively reduced, the influence of communication delay on the train operation is compensated by adding the additional safety margin, so that the train operation safety is improved, and the line transportation efficiency is improved.

The invention belongs to the field of marine meteorological intelligent sensing observation, and particularly relates to an offshore profile wind speed motion compensation method and system, and the method comprises the following steps: S1, carrying out the wind speed measurement through an ultrasonic wind speed sensor under an ideal working condition; s2, dividing the motion state of the observation platform such as the offshore buoy into three dimensions of rolling, pitching and heaving, and establishing a three-dimensional space coordinate system; s3, building a measuring platform, and respectively simulating rolling and pitching motions of the sensor by controlling the motion of the holder in the left-right direction and the front-back direction; and S4, acquiring real sea surface wind speed data, and performing algorithm compensation on the wind speed data measured by the sensor. The method has the advantages that wind speed data measured in different transverse inclination and longitudinal inclination states can be corrected, the influence of platform movement on wind speed measurement is effectively compensated, and the accuracy of wind speed measurement is improved.

A reactive power planning method considering transient voltage stability for large-scale wind and solar access includes the following steps: Step 1: Based on the scenario probability theory, typical scenarios of uncertainty characterizing large-scale wind power and large-scale photovoltaic power are constructed in sequence; Step 2: A transient voltage safety margin index based on a voltage binary table is proposed to guide reactive power planning, and a benchmark scenario for reactive power planning is constructed; Step 3: First, the configuration scheme of the dynamic reactive power compensation device is screened by the improved entropy weighted superior and inferior solution distance method TOPSIS method, and then the final configuration scheme of the dynamic reactive power compensation device is determined by the perturbation method. The method of the present invention takes into account the uncertainty of large-scale wind power and large-scale photovoltaic output, and the resulting planning scheme is applicable to all working conditions, and while ensuring the compensation effect, it saves economic costs to a great extent.

The invention relates to the technical field of wave compensation winch production, in particular to a wave compensation winch for stabilizing a trestle, which comprises a lower base and an upper platform, the upper platform is arranged on the upper side of the lower base, a trestle main body is arranged on the upper side of the upper platform, the lower base and the upper platform are arranged in a cross shape, and the trestle main body is arranged on the lower base. The width of the lower base is twice that of the upper platform, first limiting rotating seats which are symmetrically arranged in pairs are arranged on the periphery of the upper end of the lower base, second limiting rotating seats are rotationally installed on the periphery of the upper platform, and hydraulic push rods are rotationally installed between the first limiting rotating seats and the second limiting rotating seats on the upper and lower adjacent sides; the hydraulic push rods are obliquely arranged, and limiting rotating rods rotationally matched with the limiting rotating holes are fixedly installed on the inner sides of the limiting rotating holes. When the trestle body floats along with waves, it can be guaranteed that the trestle body is in a horizontal state all the time through the hydraulic push rods on the periphery of the device, and therefore it is guaranteed that the trestle body operates stably.

The utility model discloses a constant flow valve which is characterized by further comprising a constant flow valve element arranged in a constant flow valve body, the constant flow valve element comprises a valve body and a flow dividing framework connected with the valve body, a plurality of flow channels are formed between the flow dividing framework and the valve body, the flow channels are divided into water inlets and water outlets, and the water inlets are communicated with the water outlets. Sealing rings I which are deformed under high pressure to seal the water inlets of the plurality of flow channels are mounted on the flow channels; the through-flow area of the flow channel is automatically adjusted through deformation of the first sealing ring under high pressure, the influence of pressure fluctuation on flow is effectively compensated, it can be ensured that constant flow output is achieved under different pressure conditions without a complex mechanical structure or an electronic control device, the structure is simple, response is rapid, and cost is low. And the production cost and the maintenance difficulty are also reduced.

The utility model discloses liquid nitrogen filling equipment which comprises a fixing sleeve, the fixing sleeve is connected to external equipment, a sealing mechanism is arranged on the fixing sleeve, the sealing mechanism comprises an external pipe, an insertion pipe, a compensation ring, a sealing ring, a clamping mechanism, a transverse rod and a pushing mechanism, the external pipe is connected to the external equipment, and the insertion pipe is connected to the external equipment. The outer connecting pipe is slidably connected into the fixing sleeve, the inserting pipe is installed in the outer connecting pipe and slidably connected into the fixing sleeve, the two compensation rings are coaxially arranged, the two ends of each compensation ring are connected to the outer connecting pipe and the sealing ring respectively, and the sealing mechanism can achieve rapid establishment and accurate control of sealing in the liquid nitrogen filling process. The arrangement of the external pipe and the insertion pipe provides a sealed channel, and the design of the compensation ring and the sealing ring ensures the sealing stability and the compensation capability, so that the design not only improves the sealing convenience, but also ensures the stability and the safety in the liquid nitrogen filling process.

The present invention discloses a method for online calibration and compensation of torque fluctuation of synchronous motor servo system; after matching the driver and motor to be calibrated, the motor is controlled to run at a stable speed under the closed speed loop, and the speed error signal and encoder position signal are collected; the torque fluctuation frequency is estimated by an adaptive frequency estimation algorithm; the optimal sinusoidal compensation amplitude and phase are iterated online by the estimated torque fluctuation frequency; when the error meets the iteration stop condition, the sinusoidal compensation information is stored in the driver to complete the calibration; the encoder position is queried in real time, the torque fluctuation compensation amount is generated and added to the motor q-axis current to achieve compensation. The present invention is based on online frequency identification and disturbance calibration algorithm. Compared with the ordinary disturbance compensation algorithm based on offline data, the present invention uses the actual compensation residual as an indicator, gradually iterates the optimal compensation rate, and based on the mechanism correction compensation method, it has the advantages of high compensation accuracy, high degree of compensation automation, strong robustness, etc.

The invention relates to a method for screening dynamic reactive power compensation device configuration based on an improved entropy weight superior and inferior solution distance method, which comprises the following steps of: screening a to-be-configured scheme of a dynamic reactive power compensation device by using an improved entropy weight superior and inferior solution distance method TOPSIS method, and determining a final configuration scheme of the dynamic reactive power compensation device by using a perturbation method. Compared with each optimal compensation scheme under the compensation of a single-type dynamic reactive power compensation device, the optimal compensation schemes in the invention are generally larger in close degree, the economic cost is considered while the reactive power compensation effect is ensured, and the reactive power compensation scheme is better in comprehensiveness.

The invention discloses a frequency conversion sensing circuit, a wireless sensing circuit, a device, a system and a method. According to the invention, the compensation data is obtained by using the frequency change of the frequency conversion signal of the frequency conversion module in the background noise state, and the compensation data is used as the background noise data caused by the external environment change, so that the target sensing data can be obtained by using the difference between the nominal sensing data and the compensation data. On one hand, a frequency conversion signal of the frequency conversion module can be modulated through coded data, digital signal frequency conversion transmission is achieved, and the anti-interference capacity is improved; and on the other hand, the periodic on-off of the returned frequency conversion signal realizes the transmission of the identity coding data, the change of the carrier frequency represents the nominal sensing data and the background noise data, and the accurate target sensing data can be obtained by collecting the frequency change of the frequency conversion signal under the two working states within a certain time.

The utility model discloses a multi-stream spiral tube water bath vaporizer suitable for a narrow space, which comprises a cylindrical outer shell, two ends of the cylindrical outer shell are respectively and fixedly connected with end tube plates, the upper end of the end tube plate on one side is provided with a shell pass inlet in a penetrating manner, and the lower end of the end tube plate on one side is provided with a shell pass outlet; an outer spiral winding tube bundle inlet and an inner spiral winding tube bundle inlet are formed in the upper end of the end tube plate on the other side, and an outer spiral winding tube bundle outlet and an inner spiral winding tube bundle outlet are formed in the lower end of the end tube plate on the other side; a center cylinder is arranged in the cylindrical outer shell, and the two ends of the center cylinder are fixedly connected to the end tube plates through center cylinder supporting shafts respectively. An inner spiral winding tube bundle is spirally wound along the outer wall of the central cylinder, an outer spiral winding tube bundle is wound along the periphery of the inner spiral winding tube bundle, and a supporting grating is arranged between the inner spiral winding tube bundle and the outer spiral winding tube bundle; according to the utility model, a plurality of groups of spiral winding tube bundles can be wound in a limited space, so that the space of the shell is greatly optimized, and the installation in a narrow space is realized.

The invention belongs to the technical field of aircraft manufacturing, and discloses a method for quickly establishing a shot peening strengthening target strength saturation curve, which is used for improving the establishment efficiency of the target strength saturation curve and ensuring that the shot peening strength of the saturation curve is centered within a designed shot peening strength range by selecting proper air pressure and shot flow. The technical problems that the current saturation curve establishment efficiency is low, the shot blasting strength is close to the upper and lower limits of the designed shot blasting strength range, and the air pressure and the shot flow are unbalanced are solved.

The invention belongs to the technical field of component analysis of mixed materials, particularly relates to a method and a system for detecting and analyzing mixed materials based on an LIBS (laser-induced breakdown spectroscopy) technology, and provides a method for analyzing samples which are accurate, efficient and suitable for large water content change. According to the method, the spectrum of the mixed materials with the same concentration under different water contents is detected, a standardized model is established, the spectrum change of the mixed materials with the same concentration under different water contents is analyzed, the spectrum data is corrected according to the water content of a sample to be detected, and the influence of the water content on the detection result is effectively compensated. A target-enhanced DP-LIBS method is adopted, an aluminum target is arranged on the surface of a sample, a delay pulse generator controls a first laser pulse transmitter and a second laser pulse transmitter, a first laser beam and a second laser beam which are relatively delayed are transmitted, and the target plasma and the sample plasma are mutually acted, so that the target plasma and the sample plasma can be detected. The shielding effect of water molecules on plasma is reduced, and the signal intensity of sample elements is remarkably enhanced.

The utility model provides a lower electrode assembly and plasma processing equipment. The lower electrode assembly comprises a pedestal used for bearing a wafer; the focusing ring assembly is arranged in the edge area of the base, and the focusing ring assembly comprises a focusing ring and an edge electrode located below the focusing ring; the base and the edge electrode are electrically connected with a radio frequency power supply; the edge electrode is arranged close to the radial inner side of the focusing ring, and the ratio of the axial projection area of the edge electrode to the axial projection area of the focusing ring is 10%-70%. The focusing ring is used for prolonging the service life of the focusing ring.

The invention provides a human-machine interactive control method for a flexible lower limb exoskeleton, comprising: an impedance control algorithm, a reinforcement learning algorithm, an adaptive control algorithm and a nonlinear disturbance observer; a mass, stiffness and damping model is established by the impedance control algorithm and a joint reference trajectory of a user is solved, thereby revealing a mathematical relationship between the joint interaction torque and the motion trajectory of a human-machine coupling system; an impedance model parameter is optimized by the reinforcement learning algorithm under the condition that the parameters of a robot and a human body dynamics model are limited, with the goal of minimizing muscle activation and joint stiffness; an adaptive control algorithm is used to minimize the tracking error between the actual trajectory of the exoskeleton system and the output trajectory of the impedance model, and a nonlinear disturbance observer is introduced to compensate for disturbances caused by external factors such as material friction, estimation error, and tight coupling of a model, thereby achieving the best assisted walking effect.

The invention relates to the technical field of glass production and manufacturing, and discloses a spray gun for photovoltaic glass edge fire auxiliary combustion and an edge fire auxiliary device.The spray gun for photovoltaic glass edge fire auxiliary combustion comprises a spray gun body and a gun head, and the air inlet end of the spray gun body is used for communicating with a gas pipeline and a compressed air pipeline; the gun head is arranged at the air outlet end of the spray gun body and used for spraying flames. A flaming baffle is arranged in the flaming end of the gun head, and a plurality of flaming through holes are uniformly distributed in the section, perpendicular to the thickness direction, of the flaming baffle; a plurality of air suction holes are formed in the outer side wall of the gun head in the circumferential direction at intervals, and the air suction holes are located in the end, facing the spray gun body, of the flaming baffle. Therefore, the heat compensation effect on the transverse side of the raw glass sheet is ensured.

The utility model discloses a kind of proportional multi-way valves applied to wharf gangway, hydraulic pump station motor provides power source and is equipped with proportional multi-way valve, proportional multi-way valve is as control element control the movement of swing motor, telescopic cylinder and amplitude cylinder, when boarding condition, through hydraulic pump station motor start amplitude cylinder, reversing valve three control amplitude cylinder and it is lifted to set height;Reversing valve one controls swing motor and it is rotated to the top of ship;Reversing valve two controls telescopic cylinder and it is extended to specified position;Micro-motion amplitude cylinder is carried on deck on gangway;Under compensation condition, hydraulic pump station motor stops working, telescopic cylinder and amplitude cylinder are freely floating, the utility model can ensure that gangway is stably operated under different load and dynamic change, and maintenance cost is reduced.

The invention relates to a compact quick switching type four-view-field medium-wave infrared optical system, which comprises a first zoom lens group, a second zoom lens group, a focusing group and a detector which are arranged on the same optical axis, the first zoom lens group and the second zoom lens group are respectively connected with a rotating hub; the first zoom lens group and the second zoom lens group respectively comprise various lenses for changing the magnification, and the focusing group comprises various lenses for adjusting the focal length; the first zoom lens group and the second zoom lens group are cut in / out of the optical axis by controlling the rotation of the rotating hubs respectively, and light passes through any 0-2 of the first zoom lens group and the second zoom lens group and then passes through the focusing group to enter the detector; through double-rotating-hub switching, the optical system can have four focal lengths, switching of the four-view-field optical system is achieved, view field switching is carried out in a rotating hub mode, the view field switching time is shorter than one second, the switching time is short, and the needed focal length can be rapidly switched.