Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

297results about How to "No failure" patented technology

Spacecraft posture fault tolerance control method of single gimbal control moment gyroscope groups

ActiveCN105867401AApplicable fault-tolerant controlNo total failureAttitude controlFault toleranceGyroscope
A spacecraft posture fault tolerance control method of single gimbal control moment gyroscope groups includes the following steps that firstly, a kinetic equation and a kinematical equation are established when partial failures exist in the single gimbal control moment gyroscope groups (SGCMGs), wherein a coordinate system is defined, and a control system state equation is established; secondly, on the basis of in-orbit operation characteristics of a spacecraft, the spacecraft posture fault tolerance control method of the single gimbal control moment gyroscope groups is adopted; thirdly, the sliding mode control law is designed, wherein a sliding mode face is designed, the control law is primarily designed and the control law is improved. The method has the advantages that the designed control law is also applicable to fault tolerance control of aircrafts with flywheels as execution mechanisms; people do not need to learn about prior information of faults, real-time estimation of fault information and interference information is achieved through self-adaptation control, and fault time varying is allowed; the method is applicable to SGCMGs of any structure or partial failure modes of flywheels; the method is used in aircrafts of the SGCMGs, the rotation speed of a gyroscope frame serves as direct control amount, and the method conforms to engineering practice.
Owner:BEIHANG UNIV

Method for testing potential failure risks of antiskid braking control boxes by aid of quick temperature variation

The invention discloses a method for testing potential safety risks of antiskid braking control boxes by the aid of quick temperature variation. The method includes determining high-temperature numerical values of an antiskid braking control box in quick temperature variation tests; determining low-temperature numerical values of the antiskid braking control box in the quick temperature variation tests; determining a quick temperature variation rate; determining working currents applied to the antiskid braking control box in test procedures and determining temperature holding durations of the antiskid braking control box under high-temperature and low-temperature conditions; establishing a quick temperature variation test profile according to a determined high temperature of a test chamber, a determined low temperature of the test chamber and a determined temperature variation rate of the test chamber; performing five cycle quick temperature variation tests according to the established test profile; comprehensively applying an antiskid braking working current to truly stimulate potential failure risks of the antiskid braking control box. The method has the advantages that the comprehensive environmental test chamber is utilized, the temperatures are accessorily controlled via liquid nitrogen, the potential failure risks of the antiskid braking control box during temperature variation can be stimulated within two days, and accordingly purposes of improving the development efficiency, saving energy and reducing consumption are achieved.
Owner:XIAN AVIATION BRAKE TECH

Electromagnetic clamp

The invention discloses an electromagnetic clamp. The electromagnetic clamp comprises a base seat, wherein a left clamping portion and a right clamping portion which are connected together in separable mode are oppositely arranged on the base seat, a containing space which contains a work piece is formed after the left clamping portion and the right clamping portion are connected together, the left clamping portion is connected with the base seat in detachable mode, the right clamping portion is connected with the base seat in sliding mode, the left clamping portion and the right clamping portion are both provided with cavities, controllers are arranged in the cavities, a first electromagnet is arranged in the cavity of the left clamping portion, a second electromagnet is arranged in the cavity of the right clamping portion, winding directions of coils of the first electromagnet and the second electromagnet are opposite, the first electromagnet and the second electromagnet are both connected with the controllers, and the controllers are electrically connected with a power source. The electromagnetic clamp can be used in individual product production and large batch production, avoids repeated actions of drawing lines and aligning, improves production efficiency, and guarantees quality of the work piece.
Owner:浙江西塘实业有限公司

Data on-line migration method and device for updating applications in network platform

The invention provides a data on-line migration method and device for updating applications in a network platform in order to solve the problem that services fail to be executed in the prior art. The method includes the steps that at the first stage of updating, a new version application and an old version application are run simultaneously, and the new version application and the old version application have access to an old database in the running process; the first stage of updating is finished, data in the old database are all synchronized to a new database, the second stage of updating is carried out, the new version application and the old version application are run simultaneously, the new version application has access to the new database in the running process, and the old version application has access to the old database; the second stage of updating is finished, the third step stage of updating is carried out, the new version application and the old version application are run simultaneously, and the new version application and the old version application have access to the new database in the running process; when the third stage of updating is finished, the new version application is run, and the new version application has access to the new database in the running process.
Owner:ADVANCED NEW TECH CO LTD

Ionosphere propagation characteristic based phase diameter disturbance suppression method

ActiveCN104391279AWide application conditionsPhase diameter disturbance suppressionWave based measurement systemsRadar signal processingInternational Reference Ionosphere
The invention provides an ionosphere propagation characteristic based phase diameter disturbance suppression method and belongs to the radar signal processing technical field. The problem that the suppression effect is limited and even fails when the disturbance suppression is performed on the ionosphere phase diameter by the existing ionosphere phase diameter disturbance suppression method from the perspective of signal processing is solved. According to the technical scheme, the Ionosphere propagation characteristic based phase diameter disturbance suppression method comprises performing the hybrid modeling on an international reference ionosphere model and an MQP (Multi-Quasi Parabolic) model to obtain an ionosphere space reflection time-varying parameter model; deriving a phase path calculation analytic expression of the MQP model by a ray tracing method on the basis of the electron concentration profile of ionosphere space reflection time-varying parameter model and obtaining change values of a phase path along with the time after the repeated operation at different moments; performing the suppression on the back wave spectrum with the ionosphere phase diameter disturbance through a phase disturbance compensation curve obtained through fitting by a least square method and finally obtaining the suppressed ionosphere back wave spectrum. The Ionosphere propagation characteristic based phase diameter disturbance suppression method is suitable for the processing on the broadening sea clutter spectrum with the ionosphere phase diameter disturbance under a high-frequency sky wave radar.
Owner:HARBIN INST OF TECH

Inflatable butterfly valve

The invention discloses an inflatable butterfly valve. The inflatable butterfly valve is provided with a valve seat, a valve shaft installed on the valve seat and a butterfly plate component. The valve seat is provided with a medium channel provided with a central line in the axial direction of the valve seat. The valve shaft is provided with a rotation axis which extends and passes through the central line. The butterfly plate component is fixed to the valve shaft and arranged inside the medium channel. An extension portion with a valve shaft installation channel arranged internally is arranged above the valve seat. A pneumatic actuator installation flange is arranged at the free end of the extension portion and provided with a pneumatic actuator, and a driving shaft of the pneumatic actuator is connected with the valve shaft. An annular embedding body made of an elastic material is embedded in the inner wall of the valve seat in the circumferential direction and provided with two embedded ends and a deformable portion, the two embedded ends are embedded into the valve seat, the deformable portion is arranged between the embedded ends and forms an inflatable cavity with the inner wall of the valve seat, and the inflatable cavity is communicated with an air inflation hole formed in the valve body. An air inflation hole of the pneumatic actuator and an air inflation hole of the valve body are connected with an external air source through magnetic valves. The inflatable butterfly valve has the advantages of being small in friction and torque, resistant to abrasion, long in service life and suitable for the field of the chemical industry.
Owner:HANGZHOU JUNXIONG MACHINERY MFG

Air conditioner and control method and device of electronic expansion valve of indoor unit

The embodiment of an air conditioner and a control method and device of an electronic expansion valve of an indoor unit, and relates to the technical field of air conditioners. The air conditioner andthe control method and device are used for reducing the output power of a compressor of an outdoor unit after a certain indoor unit in a VRF air conditioning system stops running, and energy is saved. The method comprises the steps that when the indoor unit is in a heating mode, if the indoor unit stops running, the inlet temperature and the outlet temperature of a heat exchanger of the indoor unit are acquired; the inlet temperature is the temperature generated when a refrigerant flows into the heat exchanger of the indoor unit, and the outlet temperature is the temperature that the refrigerant flows out of the heat exchanger of the indoor unit; the difference value between the outlet temperature and the inlet temperature is calculated, and the change amount of the electronic expansion valve is calculated according to the difference value; whether the difference value is within the preset temperature range is judged; and if the difference value is not within the preset temperature range, the opening degree of the electronic expansion valve is adjusted according to the change amount. The air conditioner and the control method and device are applied to the VRF air conditioning system.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD

PVC/TPU (polyvinyl chloride/thermoplastic polyurethane) oil-resistant flame-retardant thermoplastic elastomer for new energy automobile charging pile cables

ActiveCN105602236AWill not be damagedGood large cross-section extrusion performancePlastic/resin/waxes insulatorsInsulated cablesPolyesterNew energy
The invention relates to a PVC/TPU (polyvinyl chloride/thermoplastic polyurethane) oil-resistant flame-retardant thermoplastic elastomer for new energy automobile charging pile cables. The invention is characterized in that the thermoplastic elastomer is formed by mixing a PVC flame-retardant master batch and modified TPU and carrying out granulation, wherein the mass ratio of the PVC flame-retardant master batch to the modified TPU is 1:1-3:7. The PVC master batch comprises the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 70-85 parts of plasticizer, 3-6 parts of stabilizer, 5-10 parts of lubricant, 150-250 parts of inorganic filler, 150-250 parts of flame retardant and 3-7 parts of antioxidant. The plasticizer is composed of a low-viscosity polyester plasticizer and a super-cold-resistant solid plasticizer in a mass ratio of 15:1-11:3. The cable material has the advantages of favorable large-section extrudability, smooth and particle-free surface, favorable wear resistance, favorable oil resistance and favorable flame retardancy, and can operate in an outdoor harsh environment for a long time without failures.
Owner:JIANGSU DEWEI ADVANCED MATERIALS

Ventilating heat-dissipating support structure used for ultrahigh geothermal tunnel and using method

The invention discloses a ventilating heat-dissipating support structure used for an ultrahigh geothermal tunnel. The ventilating heat-dissipating support structure comprises an initial-stage supportstructure, a waterproof layer structure, a heat insulating layer structure, a secondary lining structure, a ventilating heat-dissipating structure, a structure temperature measuring system and a transverse connecting tube, wherein the initial-stage support structure comprises an initial spraying structure and a re-spraying structure; the ventilating heat-dissipating structure is positioned in theinitial spraying structure; and the transverse connecting tube is used for connecting the ventilating heat-dissipating structure to a gas exchange system in the tunnel. According to the ventilating heat-dissipating support structure disclosed by the invention, the ventilating heat-dissipating structure is arranged in the initial-stage support structure, sub-grade type circulating ventilation is performed to realize air exchange between high-temperature gas inside the ventilating heat-dissipating structure and normal-temperature gas in the tunnel, good heat-dissipating effect is achieved, adverse effect, on the support structure, of high ground temperature is overcome, and integral durability of the funnel support structure under long-term high-temperature action is improved. The inventionfurther provides a using method of the ventilating heat-dissipating support structure used for the ultrahigh geothermal tunnel.
Owner:RAILWAY NO 5 BUREAU GRP FIRST ENG CO LTD

Functional gradient titanium alloy strip and preparation method thereof

The invention discloses a method for preparing a functional gradient titanium alloy strip. The method comprises the following steps: driving a raw material strip to move at a constant speed; electrically connecting a high energy pulse power supply with a moving strip by virtue of two immovable electric contact devices which are arranged along the strip moving direction at an interval, intermittently introducing high energy pulse current with the frequency of 60-760Hz, the voltage of 10-600V and the pulse width of 10-6000mu s into the strip, and performing high energy pulse treatment on the strip; cutting the treated strip, thereby obtaining the functional gradient titanium alloy strip. The invention also provides a functional gradient TC4 titanium alloy strip which is prepared from a TC4 titanium alloy strip with single mechanical property by adopting the preparation method, and the elasticity modulus of the strip continuously changes along the length direction of the strip. The preparation process is simple and low in cost, online continuous production can be realized, and an oxidation phenomenon on the strip surface is avoided in the preparation process. The titanium alloy strip does not cause the failure and breakage phenomena and is good in mechanical properties.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Wireless reconnection marshalling method based on digital station communication

The invention discloses a wireless reconnection marshalling method based on digital station communication. According to the wireless reconnection marshalling method based on the digital station communication, wireless reconnection is conducted between a main control locomotive and one or more controlled locomotives through digital station communication, all the locomotives are marshaled during the wireless reconnection, and the marshalling comprises the steps that (1) the controlled locomotives are marshaled, information relevant to marshalling of the controlled locomotives is input into a man-machine interface IDU of a wireless reconnection system by controlled locomotive drivers, conformation is conducted, and then preparation of marshalling of the controlled locomotives is completed; (2) the main control locomotive is marshaled, information relevant to marshalling of the main control locomotive is input into the man-machine interface IDU of the wireless reconnection system by a main control locomotive driver, and confirmation is conducted; (3) the main control locomotive driver sends a marshalling command on the man-machine interface IDU of the wireless reconnection system, and marshalling information of the main control locomotive and the controlled locomotives is checked; (3.1) marshalling reorganization is conducted; (3.2) marshalling testing is conducted; (3.3) completion of marshalling is conducted; (4) marshalling is completed. The wireless reconnection marshalling method based on the digital station communication has the advantages that the principle is simple, operation is easy and convenient, the method is easy to realize, and the reliability is high.
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD

Bearing bush and process thereof for spraying MoS2 on alloy layer

The invention provides a bearing bush and a process thereof for spraying MoS2 on an alloy layer for solving the problem that the alloy layer or the plated layer of the bearing bush peels off frequently. The bearing bush comprises a steel backing layer and the alloy layer fixedly arranged. The alloy layer is provided with a spraying layer fixed with the alloy layer. The alloy layer is one of an aluminum alloy layer or a copper-lead alloy. The spraying layer comprises a PI (Polyimide) resin layer, a MoS2 layer and a PAR (Parylene) lubricating coating sequentially arranged. The PI resin layer is contacted with the alloy layer. The bearing bush can effectively improve the dry grinding resistance, the anti-occlusion performance, the corrosion resistance and the wear resistance through the MoS2 layer by arranging the spraying layer on the alloy layer, the problem that the inner surface of the bearing bush in the installation and use process is scratched is solved, and the service lives of the bearing bush and lubricating oil in the bearing bush are prolonged. The bearing bush is good in practicality, and the whole manufacturing process of the bearing bush is safe and environment-friendly, so that the environmental pollution can be reduced.
Owner:YANTAI CHUNSHENG SLIDING BEARING

Composite strand tapered anchoring steel strand finished product cable and manufacture method thereof

InactiveCN103074851ASolve the problem of reliable clamping and anchoringGood anti-corrosion sealingBridge structural detailsShock resistanceEngineering
The invention discloses a composite strand tapered anchoring steel strand finished product cable, which comprises a cable body and two anchoring ends positioned on two ends of the cable body, wherein each anchoring end comprises an anchoring and clamping section and a sealing antiseptic section; each anchoring and clamping section comprises an end cover, a clamping piece, a wire splitting anchor plate, an anchor cup, an extension cylinder and a restriction ring; each wire splitting anchor plate is a cone with an external taper; the inner cavity of each anchor cup and the inner hole of each extension cylinder are both inner taper holes; each single steel strand of the steel strand finished product cable body is clamped on the wire splitting anchor plate by the camping piece; each wire splitting anchor plate is positioned in the inner taper hole of each anchor cup to be tightly cooperated with the inner taper hole of each anchor cup so as to form a positioning wedge-shaped anchoring structure; each extension cylinder is filled with epoxy iron sand to form a taper-shaped body which performs an auxiliary anchoring function on the steel strand finished product cable; and each sealing antiseptic section comprises a sealing cylinder, an O-shaped sealing ring and a gland. The finished cable has the advantages of high stress fatigue resistance, good shock resistance, reliable anchoring performance, compact anchorage structure and convenience in manufacture installation and anchorage change construction and is suitable for the bridge inhaul cable under the high-fatigue stress state.
Owner:LIUZHOU OVM MASCH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products