9results about How to "Fast load" patented technology

The invention discloses a robot servo parameter self-adaption method and system based on gravity compensation. The method comprises the steps that before the mechanical arm is installed, instruction debugging is conducted on each joint under different loads, the rotating speed of the joints and the rotating speed of a motor are obtained, control parameters are adjusted and calibrated, and finally the calibration result is stored as joint feature information; modeling a mechanical structure, and calculating dynamic parameters of the mass, the mass center and the motor deflection angle of an arm lever; in the operation process, the load is monitored, and a gravity compensation value is calculated in combination with attitude information; uniformly distributing the compensation value to a control period through a feedforward data channel, and applying the compensation value to a motor and a load as a compensation amount of a torque ring instruction; and the servo system dynamically adjusts the control parameter according to the gravity compensation value and the setting parameter. By implementing the method provided by the embodiment of the invention, the defects in parameter setting and dynamic adaptability of the existing technical scheme can be overcome, and the robustness and performance of the servo system in a variable environment can be improved.

The invention relates to the technical field of speed reducer performance testing, in particular to a performance testing device for a hydraulic motor speed reducer assembly, which comprises a test board, and a hydraulic motor, a speed reducer and a torque sensor are sequentially and fixedly mounted on the top surface of the test board from front to back. The rear end of the torque sensor is connected with a uniform load assembly used for loading through arranging a connecting assembly, and the right side of the connecting assembly is provided with an instantaneous load assembly used for adding an instantaneous load. The connecting assembly comprises a coupling whose front end is coaxially connected with the torque sensor, a connecting cylinder structure whose front end is coaxially connected with the rear end of the coupling, and a driving lever fixed on the outer wall of the connecting cylinder structure. According to the testing device, the instantaneous load assembly is arranged, so that an instantaneous load can be given to the speed reducer during detection, and the condition that the speed reducer is subjected to the instantaneous load can be detected; in addition, the instantaneous load assembly and the connecting assembly are arranged, so that the load condition is quickly changed, and the operation is convenient and simple.

The invention discloses a platinum-based high-entropy alloy self-supporting catalyst as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: S1, dissolving a platinum source, an iron source, a cobalt source, a molybdenum source and a manganese source in a solvent according to the molar ratio of platinum to iron to molybdenum to cobalt to manganese being 1: 1: 1: 1: 1 to obtain a precursor solution; s2, dipping the carbon felt in a polyvinyl alcohol solution, and drying to obtain a substrate; and S3, dipping the substrate in the precursor solution, drying, and carrying out Joule heat flash evaporation to obtain the catalyst. According to the invention, five metals are added according to an equal molar ratio, the catalytic efficiency of the water electrolysis catalyst is improved by utilizing a high-entropy effect, the production cost of the catalyst is reduced, meanwhile, the long-time stability of the catalyst is improved by adding a self-supporting material, and an efficient and stable water electrolysis process in an acidic electrolysis environment is realized.

The utility model discloses a liquid-cooled container control system, which comprises a cabinet main body and a double-pump circulation module integrated in the cabinet, the double-pump circulation module comprises a main liquid pump and a standby liquid pump, the main liquid pump is driven by a frequency converter, the standby liquid pump can be driven by a power frequency power supply or the frequency converter, and a multipoint temperature acquisition module is arranged in the cabinet main body. By adopting the double-pump redundancy design, the standby pump can be seamlessly connected within 200 milliseconds when the main pump breaks down, the continuous operation of the system is ensured, the availability of the system is as high as 99.99%, meanwhile, the main liquid pump is provided with the frequency converter, the rotating speed is dynamically adjusted according to real-time pressure feedback, and compared with a traditional fixed-frequency pump, energy is saved by 20-30%. Multi-point temperature collection and closed-loop control are achieved, accurate temperature control is achieved, energy consumption is further reduced, a liquid leakage detection sensor is matched to trigger a signal at the moment of liquid leakage, a power source is cut off immediately through a PLC, an alarm is given, and electric short circuit and equipment damage are effectively avoided through millisecond-level response.

This invention discloses a room-temperature bio-based asphalt cold patch and its preparation method. The cold patch comprises 96.5-98 wt% recycled asphalt pavement material and 2-3.5 wt% bio-based asphalt cold patch liquid. The cold patch liquid comprises 60-70 wt% base asphalt, 10-20 wt% bio-based diluent, and 20-30 wt% bio-based regenerator. The preparation method includes the following steps: preparing epoxidized soybean oil methyl ester and hydrogenated ricinoleate methyl ester; mixing vegetable oil and its derivatives, fatty acids and their esters, natural small-molecule organic components, and oxalic acid at room temperature to obtain a bio-based diluent; heating the base asphalt to a fluid state and adding the bio-based regenerator, followed by cooling and adding the bio-based diluent to obtain the cold patch liquid; and adding the cold patch liquid to the recycled asphalt pavement material and mixing to obtain the cold patch. The bio-based asphalt cold patch of this invention has high initial strength, high pavement stability after repair, and significantly reduces the rework rate and the probability of recurring defects.

The invention discloses a preparation method and application of a palladium-cerium-doped ZSM-5 molecular sieve catalyst, and relates to the technical field of ZSM-5 molecular sieve catalytic cracking. The molecular sieve is rapidly and efficiently prepared through two times of microwave hydrothermal treatment, the preparation time of the molecular sieve is greatly shortened, microwave impregnation directly acts on the interior of the material, the efficiency and uniformity of palladium and cerium loaded on the ZSM-5 molecular sieve are greatly improved, metal and the molecular sieve are stably combined, the thermal stability of the catalyst is improved, and the service life of the catalyst is prolonged. And the catalytic activity and the product selectivity of the catalytic reaction are obviously enhanced. According to the method, a palladium-cerium-doped molecular sieve is impregnated in a quartz wool sheet, low-value organic matters are subjected to rapid catalytic cracking by virtue of silicon carbide-assisted microwave heating, methane and hydrogen with high additional value and high yield are obtained by virtue of catalysis and selectivity of the palladium-cerium-doped ZSM-5 molecular sieve, and a product is extremely easy to collect, purify and reuse after passing through a condensation system. The low-value product catalytic conversion and waste resource utilization efficiency is greatly improved.

The application provides a data migration method and device and a computer readable storage medium. The method comprises the following steps: receiving a data migration request, wherein the data migration request carries a data copy of to-be-migrated data; in response to the data migration request, configuring distributed storage resources and object storage resources for the data copy; and performing hybrid storage on the to-be-migrated data according to the distributed storage resources and the object storage resources. The distributed storage resources and the object storage resources are reasonably configured by using the method, and the hybrid storage resources can be used to solve the problem that diversified storage requirements cannot be met.

The present invention provides an antiviral polypropylene nonwoven fabric and a preparation method thereof. The method comprises placing a polypropylene nonwoven fabric under a preset temperature for heat treatment, so that the polypropylene nonwoven fabric is softened and a micro-melting phenomenon occurs; placing the heat-treated polypropylene nonwoven fabric in an antiviral treatment solution, and using the temperature of the polypropylene nonwoven fabric to realize in-situ synthesis of nanoparticles; after the temperature of the polypropylene nonwoven fabric drops to room temperature, hot pressing is performed to obtain the antiviral polypropylene nonwoven fabric. Through the above method, the present invention can utilize the physical properties of the polypropylene nonwoven fabric to cause a micro-melting phenomenon on its surface after heat treatment, so as to load antiviral nanoparticles, thereby making the antiviral nanoparticles uniformly loaded and tightly bonded to the polypropylene fibers without destroying the performance of the polypropylene nonwoven fabric itself, giving the polypropylene nonwoven fabric excellent antiviral performance and biocompatibility, so as to meet the needs of actual production and application.

This invention discloses a multi-contact parallel-connected snap-action electromagnetic relay, comprising a snap-action armature, a moving spring portion, and a stationary spring portion; the stationary spring portion includes two stationary spring plates for realizing current inflow and outflow; one end of the moving spring portion is connected to the armature; at least three sets of contacts are provided between the moving spring portion and the two stationary spring plates to form at least three-contact parallel circuits. This invention can realize more than three-contact parallel circuits, which can reduce contact resistance, reduce temperature rise, and reduce total Holm force, thereby preventing relay failure.