10results about How to "Reduce adjustment error" patented technology

The invention discloses a harmonic suppression and dynamic reactive compensation control method for an energy router, which is suitable for a micro-grid and a distributed energy access system. According to the method, three-phase current and voltage signals of an alternating current port of the energy router are collected, five-time and seven-time main harmonic components are extracted through fast Fourier transform, harmonic compensation current instructions equal in amplitude and opposite in phase are generated and injected into an inverter to be output, and active counteracting of main harmonics is achieved. Meanwhile, the bus voltage deviation and the change rate thereof are detected, a reactive current instruction is adjusted on line by adopting a fuzzy self-adaptive PI controller, rapid and smooth dynamic reactive compensation is realized, and the bus voltage is stabilized. Decoupling control of active / reactive and harmonic components is realized in combination with Park conversion, and virtual impedance is introduced to enhance system damping and harmonic suppression capabilities. Compared with the prior art, harmonic suppression and voltage support can be simultaneously realized under a single control framework, the response speed is high, the stability is high, and the method is suitable for high-performance grid-connected operation of the multi-port energy router.

The utility model belongs to the technical field of anti - flash rust inhibitor production equipment, concretely relates to a kind of low molybdenum type anti - flash rust inhibitor production device of ph value regulation and control, including reaction kettle, reaction kettle is connected by positive pressure feeding line communication acid storage high tank, alkali storage high tank, and positive pressure feeding line includes two discharge pipes, the tank bottom of two discharge pipes is communicated respectively the acid storage high tank, alkali storage high tank, discharge pipe is connected with feed pipe, feed pipe is connected with venturi pipe throat part, and venturi pipe is installed on nitrogen tube, and nitrogen tube is connected with spray pipe, and one end of spray pipe inserted into reaction kettle interior is equipped with atomizing nozzle, and regulating valve and float flowmeter are installed on feed pipe. By observing float flowmeter and adjusting regulating valve, acid liquor or alkali liquor is added into reaction kettle at uniform speed, controllable, and production efficiency and production quality are considered;Gas-liquid mixture is sprayed at high speed by atomizing nozzle, so that acid liquor or alkali liquor is fully and uniformly contacted with reaction liquid, and side reaction caused by local over-acid or over-alkali of reaction liquid is avoided.

An adaptive control method for cyber-physical systems (CPS) subjected to injection and deception attacks includes the following steps: S1: Constructing a control system model under a cyber-physical framework; S2: Defining actuator attacks when the system's sensors and actuators are subjected to adversary injection and deception attacks; S3: Defining sensor attacks when the system is subjected to sensor attacks; S4: Rewriting the system model under cyberattacks; S5: Based on the rewritten system model, obtaining the adaptive control law u using the BackStepping method; S6: Further deriving that all signals in the closed-loop system are globally bounded based on the adaptive control law u in S5, and designing a controller by introducing Nussbaum even functions and their variable derivatives. When the system is subjected to injection and deception attacks, the control parameters are adjusted to make the adjustment error arbitrarily small. This invention can ensure that the adjustment error can be arbitrarily small under injection and deception attacks by adjusting the control parameters.

The invention discloses an active and passive compliance force control device for an abrasive belt grinding and polishing machine and a control method, and relates to the technical field of grinding and polishing machinery, the active and passive compliance force control device comprises a contact wheel substrate, an abrasive belt machine substrate, a linear compliance regulator, a guide rail mechanism, a distance detection mechanism and a controller; one side of the contact wheel base plate is provided with a rotary and movable grinding and polishing contact wheel, and a grinding and polishing abrasive belt is wound outside the grinding and polishing contact wheel; the belt sander base plate is fixedly connected to a machine body of the abrasive belt grinding and polishing machine, and the contact wheel base plate is in sliding connection with the belt sander base plate through a guide rail mechanism. One end of the linear compliance regulator is fixedly connected to the contact wheel base plate, and the other end of the linear compliance regulator is fixedly connected to the belt sander base plate. The controller drives the linear compliance regulator to drive the contact wheel base plate to move front and back so as to regulate output of grinding and polishing force. According to the method, an active and passive compliant force control combined method is adopted, constant and accurate contact force is provided for the abrasive belt grinding and polishing process, and the grinding and polishing precision and the surface quality of parts with complex curved surfaces, thin walls and the like are effectively improved.

The utility model provides an adjustable air window for a coal mine, which belongs to the technical field of mine ventilation and comprises a frame body and a plurality of louvre blades, the louvre blades are respectively and uniformly arranged in a hollow cavity of the frame body through a rotating shaft, one end of the rotating shaft is provided with an adjusting gear, and the adjusting gear is meshed with an adjusting rack. The adjusting rack is connected with a sliding mechanism, a servo motor is arranged on one side of the frame body, the output end of the servo motor is connected with a transmission mechanism, and the transmission mechanism is connected with a rotating shaft. The transmission mechanism comprises a plum coupling, a corner device, a pin coupling and a speed reducer, the output end of the servo motor is connected with the speed reducer, the speed reducer is connected with the corner device through the pin coupling, and the corner device is connected with one end of the rotating shaft through the plum coupling. Through the design of the transmission mechanism and the sliding mechanism, the transmission efficiency can be effectively improved, accurate adjustment of the ventilation quantity is achieved, and safety, reliability, high efficiency and energy conservation are achieved.

The utility model provides a kind of double-arm puncture positioning mechanism and puncture robot, wherein double-arm puncture positioning mechanism includes: two parallel interval settings linear motion unit, two movement swing arms, probe angle adjusting unit, probe, puncture angle adjusting unit and puncture execution unit;Wherein, linear motion unit is used to adjust the position of movement swing arm in first direction;One movement swing arm is used to adjust the position of probe angle adjusting unit in second direction and third direction;Another movement swing arm is used to adjust the position of puncture angle adjusting unit in second direction and third direction;Probe angle adjusting unit is connected with probe and is used to adjust the deflection angle of probe;Puncture angle adjusting unit is used to adjust the pitch angle and deflection angle of puncture execution unit.By adopting the above technical scheme, the adjustment accuracy and flexibility of the puncture robot are improved.

The invention relates to the technical field of bending equipment, and particularly discloses bending equipment for constructional engineering, which comprises an operation table, symmetrical vertical plates are slidably arranged on the side edge of the operation table, a movable block is fixedly mounted between the vertical plates, a sleeve rod is rotatably arranged in the middle of the movable block, and a vertical rod is fixedly mounted on the outer wall of the sleeve rod. Symmetrical clamping plates are arranged in the sleeve rod, symmetrical sliding grooves are formed in the positions, located on the side edges of the clamping plates, of the inner wall of the sleeve rod, sliding plates are arranged on the sliding grooves in a sliding mode, pressing springs are fixedly installed in the sliding grooves, the pressing springs are pressed between the sleeve rod and the sliding plates, and hinge columns are arranged between the sliding plates and the clamping plates. According to the bending equipment for constructional engineering, the bending face of the reinforcing steel bar can be conveniently adjusted when the reinforcing steel bar is bent multiple times, the reinforcing steel bar does not need to be manually held by hand to be frequently rotated and adjusted, the adjusting error is reduced, meanwhile, the stability is high in the reinforcing steel bar bending process, and the bending quality can be improved while the reinforcing steel bar bending efficiency is improved.

The application discloses a kind of virtual power plant distributed resource group control group regulation systems of virtual power plant technical field, comprising: virtual power plant regulation platform, deployment is in power company dispatching center, for according to the operation of power grid, issue plan adjustment demand and real-time adjustment command;Aggregator, for the total adjustable capacity and real-time total power of distributed resource reported by distributed resource group control group regulation terminal according to the overall adjustment of distributed resource, and according to the integrated distributed resource, plan adjustment demand and real-time adjustment command are decomposed, obtain the resource regulation requirement of each described distributed resource group control group regulation terminal, and issue to corresponding distributed resource group control group regulation terminal;Distributed resource group control group regulation terminal, for real-time calculation the total adjustable capacity and real-time total power of distributed resource in current jurisdiction range and report it to aggregator, and according to resource regulation requirement, select suitable distributed resource to carry out regulation.

This utility model discloses a vernier caliper for measuring the wall thickness of copper pipes in copper-aluminum composite radiators, relating to the field of vernier caliper technology. It aims to solve the problem that existing vernier calipers cannot adapt to confined spaces and can accommodate various copper pipe wall thickness measurements. The technical solution includes a scale body and a vernier. A notch is provided at the end of the scale body near the fixed measuring head to accommodate copper pipe wall thickness measurements in confined spaces. By creating the notch at the end of the scale body near the fixed measuring head, the aluminum fins or other interference structures around the copper-aluminum composite radiator can be effectively avoided, allowing the fixed and sliding measuring heads to penetrate into confined spaces and precisely conform to the inner and outer walls of the copper pipe, successfully completing the wall thickness measurement. This solves the problem of traditional vernier calipers being unable to measure due to spatial interference. Fixed claws are provided on the opposing surfaces of the fixed and sliding measuring heads, and a sliding claw is slidably connected to the sliding measuring head. A locking component is also provided on the sliding measuring head to limit the movement of the sliding claw.

This utility model relates to the field of stripping mechanisms and discloses an automatic stripping mechanism for a core shooter. It includes an upper mold and a lower mold, both equipped with stripping components. When the upper and lower molds open, the stripping components separate the sand core, which is then transferred by a core-receiving component. The lower mold is connected to a horizontal adjustment mechanism, which guides the core-receiving component, ensuring synchronous movement between the mechanism and the component. This utility model proposes an automatic stripping mechanism for a core shooter. By synchronizing the core-receiving component with the horizontal adjustment mechanism, it eliminates the need for the telescopic lifting structure of traditional core-receiving devices, reducing failure rates, operational steps, and errors, and improving reliability. Horizontal movement for receiving the sand core avoids height limitations, eliminates the need to increase the mold opening distance, and improves efficiency. The extended guide rail design provides ample space for mold hoisting and replacement, shortening downtime and improving production continuity.