12results about How to "Avoid mechanical shock" patented technology

The invention relates to a multi-shaft compressor unit and a control method thereof, in particular to a steam-electricity double-drive multi-shaft compressor unit connected with double clutches and a control method of the steam-electricity double-drive multi-shaft compressor unit. The technical problems that in the prior art, a pure electricity mode, a pure steam mode and a steam-electricity double-drive mode cannot be switched on line, and when steam is sufficient, a motor cannot be disengaged, so that energy is wasted are solved. The system comprises a multi-shaft compressor, a steam turbine, a motor, a first clutch, a second clutch, a steam flow sensor, a controller and a rotating speed sensor. The multi-shaft compressor comprises a driving shaft; the driving shaft is provided with two driving ends which are respectively a first driving end and a second driving end; the output shaft of the steam turbine is coaxially connected with the first driving end through a first clutch; an output shaft of the motor is coaxially connected with the second driving end through the second clutch; and rotating speed sensors are arranged on the first driving end, the second driving end, the steam turbine and the output shaft of the motor.

This invention provides a method and apparatus for disengaging electric power steering, relating to the field of vehicle control technology. The method includes: when determining that the current state of the vehicle meets the conditions for disengaging from automatic parking, acquiring the current rotation direction of the steering wheel, the current angular velocity, and the current hand torque direction of the driver; if the current angular velocity is greater than a safety threshold and the current hand torque direction is opposite to the current rotation direction, controlling the motor to output the magnitude of the reverse torque in a direction opposite to the current rotation direction of the steering wheel; if the current angular velocity is not greater than the safety threshold, or the current hand torque direction is the same as the current rotation direction, determining the target fusion coefficient of the current control cycle based on the fusion coefficient of the current control cycle and the fusion coefficient of the previous control cycle; and determining the target angle based on the target fusion coefficient, the current angle of the steering wheel, and the initial set angle in the automatic parking state.

The invention discloses an integrated control system for electric modification of an electric tractor, and belongs to the technical field of agricultural machinery. The system comprises a signal processing module, a health state evaluation module, a control decision module, an execution module and an optimization module, all the modules realize data interaction through the Ethernet, and the system is adaptive to heterogeneous hardware integration requirements after electric modification of a traditional fuel tractor. According to the invention, the health state evaluation module and the prediction model realize quick response and graded protection of high-voltage insulation, battery overheating and actuator fault scenes through clear quantification, and realize quantitative scoring of the health degree in the limitation of temperature, load and attitude coupling complex scenes; meanwhile, the time domain and frequency domain characteristics of the signals are extracted to provide a quantitative basis for evaluation, different actions of power reduction, speed limiting and emergency shutdown are triggered according to the health degree state, the situation that operation efficiency is affected by excessive protection is avoided, early warning can be conducted in the early stage of a fault, rapid protection can be conducted when the fault occurs, and the running safety and reliability of the tractor are improved.

The utility model discloses a hydraulic dismounting tool of elastic cylindrical pin of cable gripper, relates to cable gripper dismounting technical field, including support frame, cable gripper and spring pin, the top fixed mounting of support frame one side is equipped with hydraulic cylinder, the output of hydraulic cylinder is equipped with piston rod, the inside of piston rod is equipped with dismounting assembly and installation component, the bottom fixed mounting of support frame one side is equipped with bottom mounting seat, the top rotation of bottom mounting seat is connected with rotary support seat, rotary support seat is cooperated with cable gripper, one side of hydraulic cylinder is equipped with manual hydraulic pump, the utility model has the beneficial effect that: through adopting special fixture and hydraulic stem drive different awl of cone head to complete dismounting and installing spring pin, adopt hydraulic mode and save the strength, avoid the mechanical impact that produces to the equipment hammering, and the installation quality is stable and reliable, and effectively improve work efficiency.

This application belongs to the field of rail transit technology, and particularly relates to a train over-phase control method and system. It includes: real-time monitoring of over-phase signals and acquisition of train speed signals; determining whether the medium-voltage support of the train traction system inverter is available; when an over-phase signal is detected, the medium-voltage support of the train traction system inverter is available, and the train speed exceeds a first speed threshold, generating a state transition signal; controlling the train traction system inverter to switch to regenerative braking mode based on the state transition signal, and controlling the train traction system rectifier to stop working after the state transition signal continues for a first time threshold; when the train main circuit breaker is detected to be closed, controlling the train traction system rectifier to restart; and controlling the train traction system inverter to exit regenerative braking mode after the train traction system rectifier has stably operated in PWM rectification mode. This application achieves seamless medium-voltage transition by first supporting and then blocking the inverter.

The utility model discloses a kind of electric push rod load life testing devices, comprising: rack;Fixed seat is located in the lower part of the rack, for fixing the electric push rod to be measured;At least two horizontal parallel arrangements of sliding load, sequentially arranged in the vertical direction above the electric push rod to be measured;The lowermost sliding load is connected with the output end of the electric push rod to be measured;Guiding mechanism, vertically arranged on the rack, for guiding the sliding load along vertical direction sliding;Barrier, located on the rack or guiding mechanism, for abutting below each layer of sliding load to maintain the spacing between layers;Wherein, the electric push rod to be measured pushes the lowermost sliding load to move up and sequentially triggers the sliding load linkage of adjacent upper layer, forms load stepwise increasing.The utility model has the advantages that: the stepwise increasing of load is realized, the dynamic scene of load layer-by-layer superposition in actual working condition can be simulated, and test result is closer to real application.

The invention discloses a method for controlling a stage device to move through an electric push rod, and the method comprises the following steps: S1, constructing a plurality of groups of device control channels, and carrying out the adaptive matching and safety binding of each group of device control channels and a target stage device based on the dynamic evaluation of device fingerprints and channel capabilities; s2, generating a visual interface for each group of distributed equipment control channels, and integrally displaying static equipment information, dynamic operation parameters and graded alarm information; s3, switching between a manual operation mode and an automatic operation mode in response to the switching instruction subjected to authority authentication; s4, configuring an equipment operation rule based on the operation requirement of the stage equipment, marshalling multiple groups of equipment control channels which need to cooperatively operate, and configuring a synchronous marshalling strategy; and S5, based on the received control instruction, driving an electric push rod with touch unlocking and zero point simulation functions, and executing accurate position motion control.

This utility model discloses a continuous slicing device for traditional Chinese medicine decoction pieces based on automated control, including a feeding hopper, a distributor, a conveyor belt, a separator, a pressing mechanism, a slicing mechanism, a vibrating screen, and a power unit. The conveyor belt is divided into several conveying channels by the separator. A distributor is fixedly connected to one end of the conveyor belt at one end of each conveying channel, and the dispensing ports at the lower end of the distributor correspond to the conveying channels. A pressing mechanism is provided at the other end of each conveying channel, and its two sides are fixedly connected to the conveyor belt. A slicing mechanism is fixedly connected to one side of the pressing mechanism. A power unit is provided at the lower end of the conveyor belt, and both the distributor and the slicing mechanism are driven by the power unit. A vibrating screen is provided at one end of the conveyor belt. The purpose of this utility model is to provide a continuous slicing device for traditional Chinese medicine decoction pieces with high production efficiency, stable product quality, reduced reliance on manual labor, and reduced equipment wear.

The invention relates to the technical field of power system load dispatching, and discloses a heat pipe-containing multi-mode hybrid cooling system model prediction optimization control method, which comprises the following steps: acquiring a power distribution network state data flow containing an energy boundary fluctuation reference and a phase change transmission node evolution physical quantity; an impedance characteristic value representing a real thermoelectric coupling state is separated by using an energy boundary fluctuation reference; constructing an asymmetric constraint matrix according to the impedance characteristic value, and setting a one-way algebraic truncation boundary for limiting the power rise of the power load node when the asymmetric constraint matrix is greater than a reference threshold value; according to the method, a physical heat transfer bottleneck is substantially converted into a power distribution output constraint boundary, power oscillation is eliminated, and accurate distribution of electric energy is realized.

The application discloses a magnetic suspension micro gas turbine power station and a control method thereof, and belongs to the technical field of micro gas turbine power generation. The magnetic suspension micro gas turbine power station comprises a micro gas turbine, a magnetic suspension motor and an electronic control system. The micro gas turbine is one of a type without a regenerator, a type with a built-in regenerator or a type with an external regenerator. The air inlet of the centrifugal compressor of the micro gas turbine is arranged in the magnetic suspension motor, and the motor stator is fixed in the air inlet. The centrifugal compressor and the radial turbine are back-to-back arranged on the rotating shaft, the radial turbine is fixed on the cantilever end of the rotating shaft and located outside the two radial magnetic bearings to form cantilever support, and the centrifugal compressor, the radial turbine, the motor rotor and the magnetic bearing rotor adopt a coaxial mounting structure. The application also adopts a double cooling gas path and a three-ring nested control strategy, and realizes high integration, oil-free, efficient cooling and precise dynamic control of the power station.

This invention discloses a multi-signal fusion screw oil press anti-jamming and constant current control method and system, belonging to the field of agricultural machinery automation. Addressing the problems of low control accuracy, high fault misjudgment, and the need for manual intervention in existing technologies, the method includes: acquiring and preprocessing motor current, torque, and speed signals; comparing the actual current with the target value through adaptive PID control to adjust the speed and achieve constant current (constant pressure) control; fusion of four parameters (current exceeding threshold + rate of change exceeding threshold + torque exceeding threshold + speed below threshold) to determine jamming; in case of jamming, controlling the motor to reverse material retraction, pausing, and then smoothly restarting. The system includes signal detection, core control, execution drive, and human-machine interaction modules. This invention increases oil yield by 3%-8%, reduces the fault judgment rate to below 5%, reduces downtime to the second level, extends equipment life, and saves energy, and is applicable to various types of screw oil presses.

This invention belongs to the field of hydraulic transmission and automatic control technology, and discloses a stepless speed regulation control system and method for a hydraulic motor based on eccentricity back-calculation. By acquiring the angle signals of two swing cylinders and combining them with the preset geometric positional relationship between the center of the swing cylinder base and the center of the output shaft, the position of the eccentric center and the actual eccentricity are calculated. The target eccentricity is determined according to the target speed, and the error between the target eccentricity and the actual eccentricity is used as the control input. The controller performs PID calculations to obtain the servo valve control quantity, which drives the variable actuator to continuously adjust the position of the eccentric mechanism, thereby realizing continuous change of hydraulic motor displacement and continuous stepless speed regulation. The control process can also incorporate zero-position correction, direction consistency correction, differential filtering, anti-integral saturation, dead-zone compensation, and output limiting to improve speed regulation smoothness and control accuracy. This invention solves the problems of difficulty in measuring the state of the internal eccentric mechanism of a hydraulic motor and the difficulty in continuous speed regulation over a wide speed range.