30results about How to "Meet performance standards" patented technology

The invention discloses a preset performance ocean bottom flying node trajectory tracking control method based on a disturbance observer, relates to a preset performance ocean bottom flying node trajectory tracking control method, and aims to solve the problems that an existing method does not consider modeling uncertainty and ocean environment disturbance and propeller faults affect the OBFN (Ocean Bottom Flying Node). The method comprises the following steps that: 1: establishing a Fossen outline six-degree-of-freedom nonlinear kinetic model; 2: carrying out OBFN kinetic model transformationon the nonlinear kinetic model established in S1 to obtain an OBFN kinetic model, and determining an OBFN tracking error equation according to the OBFN kinetic model; 3: establishing a performance function; 4: carrying out error transformation on the tracking error in the S3 to obtain a transformed error; and 5: according to the transformed error obtained in S4, designing an OBFN system total uncertainty observer and a preset performance trajectory tracking controller. The method is used in the field of trajectory tracking control.

The invention belongs to the technical field of processing of metal surfaces, and provides a composite coating on the surface of an anti-alkali anti-corrosion aluminum alloy and a technology. The composite coating comprises aluminum or an aluminum alloy matrix and an anode oxide film layer coated on the aluminum or the aluminum alloy matrix, wherein an organosilicon coating is coated outside the anode oxide film layer, and the organosilicon coating is a composite layer consisting of epoxy modified organic silicon resin and methyl methacrylate. The organosilicon coating is firmly coated on the surface on which anodic oxidation is performed through construction of a mixing method and a spraying method, soaking, diffusion and closing on oxide film holes and solidification at 180 DEG C for 20-25min after flash drying of the surface layer of the organosilicon coating, infiltration of corrosive substances or alkaline substances on the inner-layer oxide film and the aluminum matrix is insulated, an aluminum alloy product processed by the technology disclosed by the invention has a good anti-alkali property and a good anti-corrosion property, the high temperature resistant property can be improved to 180 DEG C, so that cracks do not exist, and performance standard requirements can be satisfied under the condition that original appearance requirements are not changed.

The invention relates to a PEEK (polyether ether ketone) composite material preparation method. The material is chopped carbon fiber/PTFE/PEEK composite material for a gas compressor valve sheet. The technical process for preparing the composite material is innovative in that: the PEEK material is enhanced through the filling of the complex of chopped carbon fiber and polytetrafluoroethylene; the wear resistance of the PEEK composite material is improved with polytetrafluoroethylene; the chopped carbon fiber/PTFE/PEEK composite material is subjected to blending extrusion with a double-screw extruder; and after traction, cooling and pelletizing, the modified PEEK composite material is obtained. In the field of gas compressor valve sheet, compared with traditional metal materials, the PEEK composite material has good high rigidity and high toughness, and also relatively high dimensional stability, wear resistance and fatigue resistance. Also, with the material, compressor efficiency can be improved, and compressor noise can be reduced.

The invention discloses a preparation method of a powder metallurgy brake pad friction block for a high-speed train. The preparation method comprises the following steps that 1, friction body raw materials are placed into a drying machine to be dried, the corresponding weight parts of raw materials are placed into a mixing machine to be mixed, the mixture is transferred into an ultrasonic apparatus for ultrasonic treatment, and mixed friction body powder is obtained, wherein the friction body is prepared from Cu, Fe, MoS2, graphite, chromite powder, hematite powder and mullite powder; 2, the mixed friction body powder obtained in the step 1 is placed into an automatic powder pressing machine to be pressed and formed; and 3, the pressed friction block, a steel back and a welding pad are placed into an atmosphere sintering furnace to be sintered, and therefore the finished product is obtained. According to the preparation method, the process is simple, operation is easy, the cost is low, the prepared brake pad friction block is stable in friction performance, the friction coefficient can reach 0.35 or above, the abrasion rate is low, the hardness is moderate, cracking resistance and wear resistance are high, and the service life is long.

The invention belongs to the technical field of prevention and controlling of unorganized emission of dust in storing and transporting processes of coal, and discloses a white dust suppressant and a preparation method and application thereof. The white dust suppressant is prepared by the following raw materials in parts by weight: 50-200 parts of polyether diol with molecular weight of 1000, 50-200 parts of polyether diol with molecular weight of 2000, 10-50 parts of epoxy resin E-40 or E-20, 25-100 parts of polyethylene glycol, 50-200 parts of titanium oxide, 25-100 parts of calcium carbonate or argil or diatomite, 5-10 parts of copolymer containing acid group, 2-20 parts of sodium tripolyphosphate or sodium metasilicate, 20-200 parts of propylene glycol methyl ether acetate or 2,2,4-trimethyl-1,3-amyl glycol monoisobutyrate, 5-30 parts of toluene diisocynate, 5-15 parts of N-methyldiethanolamine, 5-15 parts of organic solvent, and 200-500 parts of deionized water.

The invention relates to a hand motion automatic correction and recognition method based on electroencephalogram signal detection. The method includes the following steps that 1, ERP components of electroencephalogram signals of a healthy subject are acquired; 2, electroencephalogram signals, in a corresponding brain area, of a patient suffering from serious motion limitation are acquired; 3, a feature calculation time window Fw is set, the peak value, the mean value Mean, the standard deviation SD, the correlation coefficient CORR of collected electrode signals, the autoregression model coefficient AR and the electroencephalogram signal energy E, in the feature calculation time window Fw, of the electroencephalogram signals in the finger motion automatic correction test of the healthy subject are acquired, and the peak value, the mean value Mean, the standard deviation SD, the correlation coefficient CORR of collected electrode signals, the autoregression model coefficient AR and the electroencephalogram signal energy E, in the feature calculation time window Fw, of the electroencephalogram signals in the finger motion automatic correction test of the patient suffering from serious limitation are acquired; 4, classification and recognition are carried out through a binary classification support vector machine, and whether a motion completed by the subject in the hand motion automatic correction test is a correctly-completed automatically-corrected motion is judged. Compared with the prior art, the method has the advantages of being applicable to hand motion automatic correction, accurate in recognition result, broad in application prospect and the like.

The invention relates to the field of wood floor manufacturing, in particular to a processing technology of an environmental-friendly solid wood composite floor. The processing technology of the environmental-friendly solid wood composite floor includes the following steps of coating adhesion primer; coating elastic wear-resistant primer; coating wear-resistant primer; coating sanding primer; coating matte primer; coating water-based UV adhesion finishing coat; and coating water-based transparent coloring finishing coat. According to the processing technology, by using the combination of UV primer and water-based UV finish coat to conduct opening coating, the wood floor has high hardness, strong wear resistance, and meets performance standards, and the release of harmful substances is farlower than industry standards, and the wood floor is more environmental-friendly than the wood floor coated with traditional UV.

The invention relates to a high-temperature-sintering varnish cured under an LED-UV cold light source and a preparation method of the varnish. In the method, composite resin and an active diluent anda plurality types of surfactants are employed; a plurality of small-molecular substances are added; the resins, in different types, are respectively treated; and then a stepwise temperature-increasinguniformly stirring and mixing process is carried out. The method not only can improve flexibility and glossiness of the varnish during preparation of printing ink and enhance the adhesion force whenthe varnish, after printing with inorganic pigments, is transferred on a base material, but also improves weather resistance varnish during preparation of the printing ink. The varnish has excellent anti-heat aging and anti-cold aging effect, ultraviolet aging resistance, waterproof effect and acid and alkali resistance. Meanwhile, wearing resistance, tensile rate and hardness of the varnish during preparation of the printing ink are enhanced.

The invention relates to a sink type cleaning device which comprises a first sink, a second sink internally provided with a cleaning mechanism, and a ventilation structure. The ventilation structure comprises an exhaust assembly arranged on the side wall of the second sink, an air inlet assembly arranged on the side wall of the first sink, and a ventilation pipe connecting the exhaust assembly with the air inlet assembly, the exhaust assembly is communicated with fluid inside the second sink, and the air inlet assembly is communicated with fluid inside the first sink. The sink type cleaning device is characterized in that the air inlet assembly is provided with a condensation assembly for condensing fluid and arranged to be used for condensing at least partial water vapor in the fluid drained through the air inlet assembly. Compared with the prior art, the sink type cleaning device has the advantage that the steam is condensed on the condensation assembly, water can flow out of the airinlet assembly along the condensation assembly and finally flows into the first sink, the phenomenon that condensed water flows into an air inlet of the air inlet assembly is avoided, the requirementfor the dish-washing machine performance standard is met, and the phenomenon that due to the fact that direction ventilation is caused to a cabinet, moist, mildew and damage are caused to the cabinetis avoided.

The invention provides negative ion ecological mud as well as preparation and use methods thereof, and relates to the field of building materials. The negative ion ecological mud comprises the following raw materials: heavy calcium carbonate powder, cellulose, ash calcium, starch ether, six-ring stone, white cement, latex powder and talcum powder. The preparation method comprises the steps: weighing the raw materials in proportion, crushing, sieving, and uniformly mixing and stirring to obtain the ecological mud. The use method comprises the steps: preparing the ecological mud and water according to the mass ratio of 1:(0.3-0.4), and uniformly stirring for use. The negative ion ecological mud has the advantage of decomposing and reducing formaldehyde in air, and is more environment-friendly.

The invention discloses a wide voltage power supply circuit applied to a fan or a thermantidote. The circuit comprises an insurance line, an EMC circuit, a rectification filter circuit, a PWM switch control transduction circuit and an energy storage voltage stabilizing circuit which are successively connected. The PWM switch control transduction circuit comprises a PWM control chip U1, a capacitor EC3, a resistor R5, a resistor R6, a capacitor C2, a capacitor C3 and a diode D3. The energy storage voltage stabilizing circuit comprises an inductor L2, a diode D4, a capacitor EC4 and a resistor R7. The capacitor C2 and the capacitor C3 are grounded through the reversely-arranged diode D4 respectively. An anode of the diode D4 is connected to a switch pulse output terminal of a direct current 5V through the capacitor EC4 and a cathode is connected to the switch pulse output terminal of the direct current 5V through the inductor L2. The switch pulse output terminal of the direct current 5V is grounded through the resistor R7. The circuit possesses advantages that a DC85-275V input voltage is universal; an output voltage is stable and smooth; energy consumption is low and the circuit accords with a national performance standard.