612results about How to "Guaranteed running stability" patented technology

The efficient numerically controlled polishing process and apparatus for great aperture aspherical optical elements belongs to the field of precise optical machine technology. The polishing process includes: constituting polishing process model based on the profile data obtained through measurement with interferometer or other instrument, determining the machining path, speed, pressure and other parameters of the element under the control of computer to perform simulating machining, verifying the technological parameters based on the simulating machining results and determining the ultimate technological parameters, creating NC program and machining. The present invention has high machining efficiency and high machining precision.

A steady state control method for a three-phase double-mode inverter. Off-grid steady state control is composed of outer loop power droop control, voltage feed-forward quasi-resonant control, and inner current loop dead-beat control. Therefore, the response speed of the inverter is raised, and the influence caused by the load fluctuation of a micro-grid is inhibited. Based on the off-grid steady state control, grid-connected steady state control introduces phase lead control to the power droop control. Therefore, the output voltage of the inverter is always slightly ahead of the power grid voltage, which avoids the energy pour backward phenomenon of the inverter due to a phase error, and realizes stable and reliable running in the grid-connected mode.

The invention relates to a digital control polishing machine tool of a non-spherical optical element with large caliber, which pertains to the technical filed of optical machine building and is characterized in that: the machine tool essentially consists of a base system, an upright column system and a crossbeam system; the base system comprises a base, an X-axis feeding system, an A-axis overturning feeding system and a C-axis revolved feeding system; the crossbeam system comprises a crossbeam, a Y-axis feeding system, a Z-axis feeding system, a power planetary polishing head and a polishing die. A four link rod locating mechanism is adopted to realize 16 translation of the polishing die; the machine tool has the advantages that: five-axis digital control and the manner of four-axis linking motion are adopted in the digital control polishing machine tool of the optical element; the overturning and rotating structure of a work piece is utilized, thus causing the polishing position to keep horizontal and ensuring the high determinacy of a removal function; the machine tool is controlled by adopting non-clearance transmission and a high-precision pneumatic system, thereby ensuring the operating stability of a polishing process and realizing the digital control processing of the optical element.

An embodiment of the invention provides a dust-proof net plugging degree detection device, a method and an electronic equipment, adaptable to different environments to detect the plugging degree of the dust-proof net. The device comprises a wind speed detection unit, a data conversion module and a plugging detection unit; the method comprises the following steps: collecting the rotating speed of a fan, and the wind speed parameters at the rotating speed; obtaining the wind resistance characteristic parameters, according to the rotating speed of the fan and the wind speed parameters at the rotating speed; and determining the plugging degree of the dust-proof net based on the wind resistance characteristic parameters and the alarm threshold value. The device in the embodiment of the invention can adapt to various environments and different dust-proof nets, which can give an alarm directly based on the dust-proof net plugging degree determined by the wind speed so as to notify the user to timely clean or replace the dust-proof net.

A reference voltage generating circuit has a power supply voltage node to which a driving power supply voltage is intermittently applied. The circuit includes; a first current mirror section including a first MOS transistor of a first conductivity type having a source terminal connected to the power supply voltage node and a gate terminal connected to a drain terminal as a reference voltage output node, and a second MOS transistor of the first conductivity type having a gate terminal connected to the gate terminal of the first MOS transistor of the first conductivity type and a source terminal connected to the power supply voltage node; a second current mirror section including a third MOS transistor of a second conductivity type having a drain terminal connected to the reference voltage output node and a source terminal connected to a first current path to which a first resistor and a first diode are serially connected, and a fourth MOS transistor of the second conductivity type having a gate terminal and a drain terminal connected to the gate terminal of the third MOS transistor of the second conductivity type in common and a source terminal connected to the second current path to which a second diode is serially connected; and a charge transporting section connected between the gate terminal of the first MOS transistor of the first conductivity type in the first current mirror section and the gate terminal of the fourth MOS transistor of the second conductivity type in the second current mirror section.

The invention discloses a source-load-storage coordinated scheduling method for improving new energy consumption. The method comprises the steps of S1, aggregating a thermal power plant, a new energypower plant, user loads and energy storage equipment into a source-load-storage scheduling system, and obtaining a new energy output curve, a heat utilization load curve and a power utilization load curve of the system; S2, establishing a source-load-storage coordinated scheduling model with the objective of maximizing new energy consumption quantity and minimizing the system operation cost; and S3, solving the source-load-storage coordinated scheduling model through utilization of improved multi-objective particle swarm optimization, and carrying out computing to obtain the source-load-storage coordinated scheduling method. The method has the advantages of simple realization method and flexible application. Schedulable resources such as power equipment, the user loads and the energy storage equipment in the system can be utilized rationally. The new energy consumption is facilitated, and moreover, operation cost of the system is reduced.

The control card consists of control unit, switching value input unit and signal output unit. The control unit includes RS-232, quartz multivibrator, circuit for monitoring power supply; switching value input unit includes acquisition module and isolation shaping module; signal output unit includes current signal output unit and direction signal output unit. 8254 programmable chip is adopted in pulse control circuit for counting and timer. X5045 is utilized in EEPROM chip. Features of the card are: simple hardware structure, few number of pins, and no need of driving program.

The invention relates to a damping injection control method for improving power angle oscillation of a water turbine generator set. An autocorrelation factor of the unit power angle is increased based on the structural analysis of a Hamilton model damping matrix of the water turbine generator set, namely the power angle damping is injected based on a dynamical mechanism associated inside the system, and the structural change is equivalent by designing a corresponding control law. Due to the applicability analysis of the equivalent control law, a variable structure control strategy by combining the algorithm and a traditional PID control algorithm is provided so as to control the machine set, and corresponding solutions are provided for the control of output phase step and other problems. The simulation proves that: the provided control algorithm can effectively improve the oscillating characteristics of the power angle of the machine set, even can keep the stability of the machine set under lower damping.

The invention provides an extraction device and method. A mixed settler extractor comprises a mixing chamber, an organic liquid film generator, a gas-liquid separation device and a liquid-liquid coalescence separation device. The mixing chamber is provided with a heavy phase input port and a first heavy phase discharge port. The organic liquid film generator is connected with the mixing chamber and provided with a light phase input port and a gas inlet. The gas-liquid separation device is connected with the mixing chamber. The liquid-liquid coalescence separation device is connected with the gas-liquid separation device and provided with a liquid inlet, a first light phase discharge port and a second heavy phase discharge port. The extraction device can be provided with no clarifying chamber, the integrated structure of the mixing chamber and the clarifying chamber is well achieved, the problem of heavy phase liquid distribution uniformity of a mixing chamber and the problem about light phase, heavy phase and gas phase separation of the mixing chamber are solved, the occupied area is small, energy consumption is low, a high-flow water solution containing a to-be-separated target object can be treated, and back-mixing of a high-position extraction tower can be relieved.

The invention relates to a system for controlling the gas injection quantity of a multi-split air conditioning unit through enhanced vapor injection. The system comprises a compressor, an oil separator, a four-way valve, an outdoor unit heat exchanger, a heating electronic expanding valve assembly, a plate type heat exchanger, a gas injection electronic expanding valve, a gas and liquid separator,an indoor unit heat exchanger and an indoor unit electronic expanding valve; a gas injection pipeline in the compressor is provided with a one-way valve; a first temperature sensor is arranged at thetop of the compressor; a second temperature sensor is arranged between an inlet on the evaporation side of the plate type heat exchanger and an outlet of the gas injection electronic expanding valve;a third temperature sensor is arranged between an outlet on the evaporation side of the plate type heat exchanger and a gas injection inlet of the compressor; and a high-pressure pressure sensor is arranged between the oil separator and the four-way valve. The control method comprises the following steps: performing on-off control on the gas injection electronic expanding valve according to the compression top overheat degree of the compressor and performing opening adjustment on the gas injection electronic expanding valve according to the overheat degree of the plate type heat exchanger, sothat the gas injection quantity is optimal, the operating stability of the unit is guaranteed and the energy efficiency of the unit is improved.

The invention provides a method, system and device for carrying out online self-correcting on the optimal gain of a wind generating set. The method comprises the following steps of: acquiring the real-time temperature of the peripheral environment; acquiring the actually-measured data of unit running; drawing an actually-measured rotating speed-torque curve, comparing the actually-measured rotating speed-torque curve with a theoretical curve, and calculating a root-mean-square error; calculating an optimal gain value, and carrying out correction on the optimal gain value; calculating a real-time gain value, and carrying out gain modification on the optimal gain value; carrying out gain limit on the optimal gain output; and transmitting the optimal gain value back to a master control PLC (programmable logic controller) through network communication. The system comprises a temperature calculation module, a data acquisition module, an error analysis module, a gain correction module, a gain modification module and a gain limit module. The device mainly comprises a temperature sensor, a temperature processing circuit, a self-correcting system and a master control PLC. According to the invention, the online correction on the optimal gain can be realized, and the cost is low, thereby facilitating popularization.

The invention discloses a spinning oil fume purifying device, which belongs to the technical field of synthetic fiber. The spinning oil fume purifying device comprises a shell; multiple anode tubes are vertically arranged in the shell; a cathode line is vertically hung in the centre of each anode tube; the upper part of each anode tube is inserted into an upper card, and the lower part of each anode tube is inserted into a lower card; the upper and lower cards, the outer walls of the anode tubes and the inner wall of the shell surround a closed cavity; the upper part of the cavity is communicated with a heat tracing steam inlet on the side wall of the shell; and the lower part of the cavity is communicated with a heat tracing condensed water outlet on the side wall of the shell. When oil fume passes through the anode tube, the oil fume particles mixed in the fume are charged under the action of an electric field and then adsorbed on a cathode and an anode. Through the invention, the accumulated oil stains are heated to 70-120 DEG C by the steam heat tracing so that the fluidity of the waste oil stains is maintained and the oil stains can smoothly flow into an oil collector on the bottom of the device,thereby guaranteeing the operation stability of the equipment and laying a good foundation for the collection of waste oil. The purifying device of the invention has notably good purifying effect and ensures that 95% of the oil fume in the waste gas can be removed.

The invention provides a method for determining the peaking demand of a large-scale wind power integration system. The method comprises the following steps: generating a year-round wind power output time sequence; generating a year-round load time sequence; and building a conventional generator set status transfer sequence considering planned generator shutdown, determining the peaking demand of a large-scale wind power integration system, drawing a peaking demand curve, and doing statistics of peaking demand indexes. The method presented by the invention is simple, practical and highly operable. The problem that there is a need for generator set combination in the traditional method of status transfer sampling only considering forced generator shutdown is avoided. An accurate and effective analysis method and evaluation indexes are provided for solving the problem that the peaking capacity of a large-scale wind power integration system is inadequate. The peaking demand of a wind power integration system can be reflected directly. The operation stability and reliability of a large-scale wind power integration system are guaranteed.

The invention relates to an active stability control method of a water-turbine generator set, which comprises the following steps: calculating the stability control value of the water-turbine generator set under the given output by using a Hamiltonian model of the water-turbine generator set, determining the limiting conditions of the stability control value, improving a stability control algorithm, and then, determining the constitution scheme of an actual controller. The method of the invention improves the stability of an electric power system by the active stability of the set, avoids the influence of the complexity of the electric power system on the design of a set controller, and simplifies the design process; in the stability control method a given output target value is used as a control basis to reduce the coupling action between the set and the electric power system, and the output deviation is used as feedback compensation to solve the problem of output deviation caused by the model error of the stability controller; and the stability controller can keep the operation stability of the set in case of lower damping.

The invention relates to a liquid tank without a free liquid level, which is characterized by comprising a liquid tank body; the liquid tank body consists of a tank bottom and tank walls which vertically extend upwards on the periphery of the tank bottom; a tank cover is movably mounted at the upper part of the liquid tank body; a sealing ring is arranged between the tank cover and the inner sides of the tank walls; the inner side of the tank cover is provided with a probe of a dielectric constant measuring instrument; and the outer side of the tank cover is connected with a hydraulic oil cylinder. The inner side of the tank cover of the liquid tank without the free liquid level is provided with the probe of the dielectric constant measuring instrument, which is used for measuring the dielectric constant of a substance near the upper surface of liquid in the liquid tank; the dielectric constant is used for judging whether the free liquid level is formed in the liquid tank or not; the position of the tank cover is automatically regulated, thereby eliminating the free liquid level in the liquid tank, so that the liquid tank is always in a full-tank state; the damage to a liquid tankstructure is decreased; safety misadventures such as leakage and the like are prevented from occurring; the risk of the damage to local and overall structures of a ship or other liquid transporting tools is decreased; and the running safety and the stability of the transporting tools are guaranteed.

This invention belongs to the technical field of computer operating systems, particularly in relation to a design method of the software, which will run interoperability in a single operating system, but at first this software ran in many operating systems. The design method of this invention is a single-core model structure with multi-interfaces, it founds a core service system with coordinate different operating system, which bases on the new invented core; when running apply program, it will distinguish this program belonging to which type of operation system's program according reading the head of file to check the type or format of this file, and then transfer relevant core service, thereby it settle the problem of interoperability of single operation system. The space interoperability system redesigned, reintegrated, redeveloped basing on opening original code, can run the program from Windows and Linux operation system synchronously. The realization of this interoperability technology doesn't only reduce the cost, but also has a better practicability and spread applied worth.

The invention discloses a migration method and device for a virtual machine in a resource pool of a cloud computing system. The method comprises the following steps: acquiring state information of a plurality of physical hosts including CPU utilization rate, memory utilization rate, CPU temperature and operation parameters of a power supply, determining a physical host of which the CPU utilizationrate is greater than an upper limit value; memory usage rate is greater than upper limit value, the CPU temperature is greater than the upper limit value and the operation parameters of the power supply meet a first preset condition to be a source physical host, and a physical host of which the CPU utilization rate is less than the lower limit value, the memory utilization rate is less than the lower limit value, the CPU temperature is less than the lower limit value and the operation parameters of the power supply meet a second preset condition to be a target physical host; data on the to-be-migrated virtual machine with the CPU occupancy rate larger than the CPU occupancy rate threshold value and the memory occupancy rate larger than the memory occupancy rate threshold value in the source physical host are migrated to the idle virtual machine on the target physical host, and the operation stability of the cloud computing system and the success rate of virtual machine migration are improved.

The invention discloses a climbing robot walking along an overhead line, and the climbing robot comprises a support structure which comprises a controller. One side part of the support structure is provided with a front cantilever device, a center cantilever device and a rear cantilever device. The three cantilever devices are connected with the support structure through a cantilever device pedestal, and the front cantilever device and the rear cantilever device are located at two ends of the support structure. The front and rear cantilever devices each comprises a walking drive mechanism located at the top, an unfolding mechanism, a flexible rotating mechanism, a clamping mechanism, and a lifting mechanism which is located below, wherein the unfolding mechanism, the flexible rotating mechanism and the clamping mechanism are located at the central part. The center cantilever device comprises a walking drive mechanism at the top, an unfolding mechanism and a flexible rotating mechanismwhich are both located at the central part, a lifting mechanism located below, and a charging mechanism located at the front side of the center cantilever device. The climbing robot achieves the stable walking and climbing along an overhead line (220kV-500kV), and can be installed on a shock-proof hammer and a suspension line clamp on the overhead line in a crossing manner. The climbing robot is strong in obstacle crossing capability, is high in obstacle crossing efficiency, is large in climbing angle, is stable in structure, is light in weight, is simple in operation, and is good in real-timeperformance.

The invention discloses a tabouret actuating auxiliary rail, which comprises the following parts: rail, slider on the rail, wherein the rail wheel is set on the slider; the rail contains rail base and abrasion-proof bulk rail base; the rail wheel slips in the abrasion-proof bulk, which connects slider through eccentric adjusting device to form cavity to contain rail wheel for lubricate.