14results about How to "Prevent overshoot" patented technology

The utility model belongs to ship equipment technical field discloses a kind of wave compression device and boat. Wave compression device includes hinged six-bar mechanism, spoiler piece and rotary drive part, rotary drive part drives spoiler piece rotation by hinged six-bar mechanism, to make spoiler piece have the working position of extension into water. The utility model is driven by first connecting rod continuous rotation, by the hinged transmission of fourth connecting rod and spoiler piece, the swing angle of spoiler piece is naturally limited by the rotation range of first connecting rod, without setting rigid stroke end, allowing rotary drive part continuous rotation, without reversing, avoid the "overshoot phenomenon" of traditional reciprocating motion, eliminate the vibration, wear and tear and control deviation problem caused by overshoot fundamentally.

This invention proposes a winch control method for controlling the operation of a MOSFET full-bridge topology circuit. The method includes an adaptive algorithm to automatically adjust the PWM control signal: sampling the input current of the winch's electric motor every cycle or every N cycles and calculating the current change rate. To avoid noise interference, the current value is processed to obtain the calculated current. The PWM control signal is then automatically adjusted based on this calculation, specifically as follows: [Calculation details omitted]. This control method facilitates better control of the electric winch operation. The invention also proposes a system, a smart terminal, and a medium for implementing the aforementioned control method.

The utility model relates to the technical field of swimming pool water outlet, disclose a straight -in type water mouth with side water outlet. It aims at solving the technical problem of low work efficiency of big workload that the water outlet direction setting is on the top cover in the prior art, and the design of vertical direction leads to the dust and sundries of pool bottom gathering at the water outlet position, and only can use the dirt -suction machine to clean, the workload is big, and the work efficiency is low. The utility model includes base, detachable installation top cover above base, set up a plurality of side water outlets on the side of base, base is connected with backwater pipe through side water outlet to form water flow channel, annular supporting block is set up in the inner wall of backwater pipe to support adjustable pressing plate, adjustable pressing plate is installed in the middle of adjustable screw rod, adjustable screw rod is installed in hollow cylindrical structure, hollow cylindrical structure is fixed in annular supporting block through connecting rod, the thread of adjustable screw rod is set up in the inner wall of hollow cylindrical structure. The utility model has the advantages of saving construction time, high work efficiency, low construction difficulty and the like.

This invention relates to the field of motor control, and more particularly to a positioning and calibration method for a gantry mechanism of a bonding machine based on solder joint alignment. The method includes: monitoring the speed difference and real-time displacement deviation of two independently controlled servo motors on both sides of the gantry mechanism; calculating the predicted displacement deviation on both sides of the gantry mechanism based on the speed difference and real-time displacement deviation; calculating the deflection angle of the gantry mechanism's crossbeam relative to the guide rail length direction based on the predicted displacement deviation; determining the target speed of the two servo motors based on the deflection angle; and determining the change process of the current speed towards the target speed. This invention utilizes the length of the crossbeam to ensure that the generated corrective torque is physically matched with the required angular deviation; it can automatically plan a smoother speed change rate under high-risk conditions with relatively large deflection angles; and it employs a relatively fast speed change process under normal fine-tuning conditions with relatively small deflection angles, thereby ensuring the system's rapid response capability to minor disturbances.

This invention relates to the field of power distribution switchgear technology, and particularly to a load switch operating mechanism for a ring main unit, comprising a switch operating shaft, a grounding operating shaft, an energy storage component, and a limit component. The switch operating shaft is coaxially arranged with the switch drive shaft, and a first drive dial is located at its end; the grounding operating shaft is parallel to it above, and a second drive dial is located at its end. The energy storage component is pivotally connected to the switch drive shaft and the grounding operating shaft at both ends, respectively, enabling it to correspondingly perform closing and grounding energy storage and achieve rapid energy release during opening. The limit component includes a first driven dial, a second driven dial, a first limit arm, and a second limit arm. The two limit arms are respectively located above and below the first driven dial, ensuring reliable overshoot and rebound prevention when the switch is in the closed position performing an opening action; and reliable overshoot prevention when opening from the grounding position. When closing, the switch operating shaft rotates forward to unlock and store energy; when opening, it rotates backward to release energy and prevent overshoot and rebound; when grounding, the grounding operating shaft rotates backward to unlock and store energy.

The utility model discloses a kind of soft-start control circuit based on output voltage feedback, soft-start control circuit includes buffer circuit and control circuit, the buffer circuit includes operational amplifier;The buffer circuit is used to prevent the overshoot phenomenon of output voltage, makes output voltage curve change smooth;The control circuit includes capacitor, control tube, voltage divider component and discharge tube, the capacitor is connected with the drain of the discharge tube and the operational amplifier, the voltage divider component is connected with the capacitor and the control tube respectively;The control circuit is used to control soft-start time.The utility model can improve the response speed of soft-start control circuit, avoid appearing output voltage overshoot phenomenon;And it can accurately control soft-start time, effectively controllable limit in power-on process inrush current.

This invention discloses an electronic expansion valve structure and vehicle, comprising a valve seat and a housing. A valve core seat is disposed within the valve seat, and a valve core capable of axial displacement is disposed within the valve core seat. A rotor and a transmission rod are coaxially arranged within the housing. The transmission rod is axially limited and circumferentially rotatable, and is fixedly connected to the rotor. The central axis of the transmission rod is not collinear with the central axis of the valve core. The transmission rod and the valve core are connected by a worm gear and rack mechanism. This invention provides a novel split-type transmission valve core structure to achieve transmission, adjustment of valve opening, and change of step angle.

This invention relates to a model buffer and capture device for land-based vertical catapult tests. The device, used to capture a model, includes a damping system and a capture system. The damping system absorbs energy and buffers during the capture process. The capture system, mounted on the damping system, includes a capture support with a buffer net at its top and a gripper system below the net for clamping and securing the model. A photoelectric proximity switch is also mounted on the capture support; when the switch detects an object passing through, it sends an electrical signal to control the gripper system. A launch tube, vertically positioned below the capture system, launches the model. This invention enables capture in vertical land-based catapult tests, allowing for safe, damage-free, and efficient model recovery after launch, thus improving test efficiency. The buffer system significantly reduces the load on the grippers during model capture, enhancing the overall system reliability.

This invention relates to the field of intelligent temperature control technology for foot bath tubs, specifically, to an intelligent temperature control method and device for foot bath tubs based on multimodal sensing. It includes the following steps: collecting initial foot skin surface temperature of the user, water temperature, pressure signal, ambient temperature, and water level data within the foot bath tub; calculating the temperature difference based on the initial foot skin surface temperature and water temperature; determining whether the user is in the foot-in and foot-out state through pressure signal and water level changes; and calculating the total system heat demand power of the foot bath tub by combining ambient temperature, water level data, and temperature difference; and dynamically generating temperature control commands based on the temperature difference, foot-in and foot-out state, and the corrected total system heat demand power. This invention, by integrating multimodal sensing data such as a flexible temperature sensor array, pressure distribution array, water level, and ambient temperature, enables the system to not only accurately obtain the initial temperature difference between the user's foot skin and the water, but also to combine contact effectiveness analysis and a dynamic weighted algorithm.

This invention provides a control method, apparatus, and temperature control device for a magnetic refrigeration temperature control system, relating to the field of temperature control technology. The magnetic refrigeration temperature control system includes a magnetic refrigeration unit and a heat exchange unit. The method includes: acquiring current environmental parameters and calculating the deviation between the current environmental parameters and target environmental parameters; adjusting the control parameters from the previous moment based on the deviation value and a preset adjustment coefficient to obtain the control parameters for the current moment; wherein the control parameters include magnetic field strength, magnetic field change frequency, and working fluid flow rate; and controlling the magnetic refrigeration unit and heat exchange unit based on the control parameters for the current moment. This invention enables the entire magnetic refrigeration temperature control system to intelligently respond to environmental changes, maintaining efficient, stable, and precise operation.

This utility model discloses an environmentally friendly printhead cleaning device for printing equipment, belonging to the technical field of printing equipment. It includes a stopper cylinder and a storage cylinder, connected by a connecting block. A one-way feeding component connects the stopper cylinder and the storage cylinder, and a one-way discharging component is connected to the bottom of the stopper cylinder. The stopper cylinder is made of transparent plastic and has graduations on its outer side. A stopper rod slides inside the stopper cylinder, with a stopper handle installed at the top and a piston installed at the bottom. The stopper handle is located outside the stopper cylinder, and the piston is located inside. A protective box is installed at the top of the stopper cylinder. A rack is installed on the side of the stopper rod, and a gear is installed inside the protective box, meshing with the rack. A knob is located on the outside of the protective box, coaxially connected to the gear. A sealing cap is used to seal the inkjet nozzle of the printhead. This technical solution can achieve precise control of the cleaning agent injection volume, protect the precision structure of the printhead, and improve cleaning efficiency and stability.

This application relates to a field weakening control method and related equipment for a permanent magnet synchronous motor (PMSM). The method includes: obtaining the initial value of the phase current of the stator coil of the PMSM, the initial value being equal to the initial quadrature-axis current value of the stator coil; when the phase current has not reached a current threshold, performing field weakening control on the stator coil based on a preset negative direct-axis current compensation method; when the phase current reaches the current threshold, determining the stop angle of the stator coil's lead angle based on the current speed of the PMSM, the initial quadrature-axis current value, the current threshold, and the voltage threshold of the stator coil; and performing field weakening control on the stator coil based on a preset current lead angle control method until the lead angle reaches the stop angle. This solves the problem that when the phase current of the PMSM reaches the current threshold of the stator coil, the quadrature-axis current is limited by the current threshold, resulting in overshoot and reduced accuracy of field weakening control.

The utility model relates to the technical field of automation practical training teaching especially, it relates to a kind of feeding structure for automation practical training teaching, comprising: first automatic turntable is equipped with material receiving work station table;Second automatic turntable is equipped with first cylinder;Material container, its bottom is equipped with blanking passage, and is configured to stir mechanism to stir material into blanking passage;Pneumatic transfer feeding mechanism is used to transfer the material from blanking passage to suction nozzle material taking work station;Material transfer suction nozzle is installed in first cylinder and is driven to lift by it, for under the cooperation of second automatic turntable, material on pneumatic transfer feeding mechanism is transferred to material receiving work station table. The feeding structure can significantly improve feeding efficiency and accuracy, and is suitable for automation practical training teaching scene.

The invention relates to the technical field of power system frequency modulation control, and discloses a boiler master control optimal advance control method and system. Extra coal quantity correction composed of the optimal advanced coal quantity increment and the compensation quantity is applied at a time during first change or trend direction switching; wherein the value of the compensation quantity is equal to the optimal advance coal quantity increment of the previous adjustment stage and is only started during direction switching; the system acquires instantaneous deviation after responding, and updates the optimal advance coal quantity increment according to the deviation only when the operation data comprises a continuous lifting and single lifting load conversion stage; according to the method, quick response, adaptive optimization and stable control are realized, and the AGC frequency modulation performance of the thermal power generating unit is remarkably improved.