408 results about "Energy feedback" patented technology

The invention provides a method and system for achieving elevator energy feedback data communication. The method comprises the steps that multi-modal data are collected, and fault features are extracted, encrypted and packaged; and after decryption, phase deviation of elevator operation and power grid voltage is calculated by utilizing an algorithm, a current phase is synchronously fed back, and a feedback instruction is generated. Uploading the harmonic suppression parameter to an energy center, calculating a demand, generating a region-level feedback strategy, dynamically distributing a feedback power upper limit, synchronizing the harmonic suppression parameter, and obtaining region-level feedback data. And aggregating feedback data, and setting a global optimization target, including cost minimization, feedback maximization and carbon emission reduction. And calculating feedback energy and carbon integral according to a target adjustment algorithm, automatically settling to an operator account, and adjusting the target of the next period. Through an algorithm and an optimization mechanism, the problem of energy waste of a brake resistor in a traditional feedback technology is solved, the feedback efficiency is improved, and energy waste is reduced.

The invention relates to the technical field of power electronic control, and discloses a voltage and current stabilization and surge suppression cooperative control method for power equipment, and the method comprises the following steps: dynamically segmenting an output current frequency band, and remodeling the output impedance characteristics of a system; predicting and controlling a hierarchical optimization control target based on a multi-time scale model; dynamically switching an energy feedback path; identifying aging parameters of the device on line and adaptively adjusting a control strategy; global stability verification and fault-tolerant protection: verifying the stability of the control system based on the Lyapunov stability theory, and triggering a protection mechanism when the magnetic flux is saturated or the aging of the device exceeds the limit. By means of dynamic impedance frequency domain segmentation, the impedance characteristic of the system is divided into a low-frequency voltage stabilization area and a high-frequency surge suppression area according to frequency bands, the contradiction that in a traditional method, it is difficult to consider steady-state precision and transient surge suppression at the same time due to the single impedance characteristic is solved, and collaborative optimization of voltage stabilization control and surge energy blocking is achieved.

The invention discloses a feedback type programmable alternating current source load integrated test system, and belongs to the technical field of power electronics. A feedback type programmable alternating current source load integrated test system comprises an alternating current power supply module, an alternating current load module, an energy feedback module, a control module and a test module. The system solves the problems that an existing test system can only provide a single power supply or load function, and excess energy cannot be effectively recycled in the test process, and through cooperative work of the alternating current power supply module, the load module and the energy feedback module, the test efficiency is improved, and the test cost is reduced. Programmable output of an alternating-current power supply, flexible simulation of load characteristics and efficient feedback of redundant electric energy are achieved, the flexibility and the resource utilization rate of the test are improved, the optimal design of the control module comprises the functions of data acquisition, control optimization, fault diagnosis and the like, the real-time performance, stability and reliability of the system are ensured, and the test efficiency is improved. And the load change and the fault condition can be quickly responded.

The utility model discloses a polycrystalline reduction starting device and a microwave power supply heating system, and relates to the technical field of polycrystalline silicon, a polycrystalline reduction furnace comprises a reduction furnace base and a bell jar which are detachably connected, the polycrystalline reduction starting device is characterized in that the tail of a microwave energy feedback device is connected with a microwave transmission device, and the microwave transmission device is used for being connected with a microwave emission device; the microwave energy feedback device is installed on the surface of the bell jar and guides microwave energy into the polycrystalline reduction furnace to heat the silicon core. The microwave energy feedback device introduces microwave energy into the reduction furnace to heat the silicon core, so that the resistance value of the silicon core can be reduced, the silicon core can be subsequently subjected to breakdown start with lower voltage, microwave heating can be started at low voltage, the phenomenon of discharge sparking in the reduction furnace is avoided, an insulating part at the bottom of the reduction furnace is prevented from being damaged, and safe operation of equipment can be ensured; and other materials or impurities cannot enter the reduction furnace through microwave heating, so that the environment of the reduction furnace is prevented from being polluted, and the purity of generated polycrystalline silicon is prevented from being reduced.

The invention provides a bidirectional DC-DC energy feedback system based on multi-source integration and a control method thereof, and relates to the technical field of energy recovery. The system comprises an input source module used for obtaining multiple input sources; the bidirectional DC-DC power conversion module is adaptively connected to the input source module and the energy storage power grid interface module so as to realize bidirectional controllable transmission of energy; the multi-source energy management module is used for being adaptively connected with the control unit, inputting real-time data acquired by the sensor network into the AI optimization unit for dynamic parameter adjustment and then transmitting the real-time data to the control unit; the control unit is integrated with a digital signal processor DSP and an FPGA; the DSP is used for executing a dynamic control strategy; the FPGA is used for generating a high-frequency PWM driving signal; and the energy storage power grid interface module is used for realizing standardized power interaction between load ends. The energy utilization efficiency can be improved, harmonic pollution can be reduced, the dynamic response capability can be enhanced, and the method is suitable for new energy automobile braking energy recovery, renewable energy source storage and industrial test equipment scenes.

The invention discloses a charging pile testing system and method based on energy feedback and photovoltaic energy storage, and belongs to the technical field of charging pile testing. The system comprises a power grid power supply interface module, a photovoltaic assembly module, an energy storage module, a charging pile interface circuit module, a multi-mode test load module, an energy feedback module, a central control module and a data acquisition and analysis module. According to the system, the technical effects of efficient energy feedback, intelligent collaborative management of light storage and charging and multi-mode dynamic scheduling in the charging pile testing process are achieved.

The invention belongs to the technical field of power electronics, and relates to an energy feedback high-power-factor air conditioner compressor driving system. Comprising a direct-current bus, a direct-current bus electrolytic capacitor, a motor driving circuit, a shutdown energy feedback circuit, a permanent magnet synchronous motor and a motor control module, wherein the two ends of the direct-current bus electrolytic capacitor are connected with the positive electrode and the negative electrode of the direct-current bus respectively; in the energy feedback control module for driving the combined switch device in the shutdown energy feedback circuit, the motor driving circuit and the shutdown energy feedback circuit, the second connecting end I of each phase of bridge arm is connected with the positive electrode of the direct-current bus, and the second connecting end II of each phase of bridge arm is connected with the negative electrode of the direct-current bus; the first connecting end of the phase bridge arm of the shutdown energy feedback circuit is connected with the phase power grid voltage through the phase filter inductor. The method can maintain the stability of the DC bus voltage, and reduces the influence of the power grid voltage fluctuation and the air conditioner compressor load fluctuation.

An elevator energy-saving control system of a direct feed network relates to the technical field of elevator energy-saving control, and comprises an energy conversion module for converting kinetic energy and gravitational potential energy generated during operation of an elevator car into direct current; the control system module monitors elevator running state data and power grid parameters in real time, judges whether the elevator is in a power generation state or not according to a monitoring result, automatically starts an energy feedback mode and controls starting and stopping of energy feedback and power adjustment; the inversion grid-connected module is used for converting the direct current into alternating current, processing the generated alternating current and feeding back the electric energy in the form of the processed alternating current to a power grid; and the man-machine interaction module is used for receiving data information of the control system in real time and converting the data information into visual display content, so that a worker can master the operation condition of the system in time and deal with abnormal problems. The elevator running energy consumption is remarkably reduced, the running cost is reduced, meanwhile, the service life of equipment is prolonged, the stability of the equipment is improved, and the influence on the environment is reduced.

The invention relates to the technical field of regenerative braking energy feedback, in particular to a regenerative braking energy storage and feedback system based on a super capacitor, which comprises a real-time monitoring port, an energy management port and a power distribution optimization port, the monitoring module is used for monitoring the running speed and acceleration of the vehicle and the charging and discharging current, voltage, power fluctuation and residual life of the supercapacitor in real time; the energy management port is used for performing energy distribution between the super capacitor and the battery; and the power distribution control port is used for adjusting the charging and discharging strategy of the super capacitor in real time according to the driving state of the vehicle.

The invention relates to the technical field of oil pumping unit control, and provides an oil pumping unit frequency converter dynamic regulation and control device and method based on deep learning, and the device comprises a motor operation data detection device which is used for the motor operation state of an oil pumping unit, and comprises a phase voltage, a phase current and a power factor; the main control unit is configured to predict a voltage value of a frequency converter of the oil pumping unit based on an aggregation model of score and weight parameters and a deep learning model according to the detected load and the motor operation state of the oil pumping unit, and send the voltage value to the full-power adaptive regulator; and the full-power self-adaptive regulator is used for connecting the main control unit and the frequency converter, is arranged on the output side of the frequency converter, and ensures that the motor of the oil pumping unit runs in the optimal interval by self-adaptively regulating and controlling the regulation and control instruction of the frequency converter according to the received predicted voltage value. The device disclosed by the invention can realize intelligent tracking of the motor along with load change, and can realize harmonic suppression and energy feedback.

The invention discloses an elevator no-load energy recovery energy-saving damping device, and belongs to the technical field of elevator energy saving and damping, the elevator no-load energy recovery energy-saving damping device comprises a main body frame assembly, an elevator car structure and a self-adaptive adjusting mechanism, the elevator car structure is arranged in the main body frame assembly, and the self-adaptive adjusting mechanism is arranged on the main body frame assembly. Through the arrangement of the main body frame assembly, the elevator car structure and the self-adaptive adjusting mechanism, friction force borne by an elevator in the running process is effectively reduced, it is guaranteed that the elevator is stable in the running process, and meanwhile the service life of the elevator is prolonged. A frequency converter, a regenerated energy detection device, an energy feedback device, a super capacitor and other existing devices on the market at present can be additionally arranged at the position of a power source of the elevator, redundant energy generated when the elevator is unloaded is recycled, converted and stored, energy waste is avoided, energy saving is effectively achieved, and the cost is reduced. The problems that an elevator used in the market at present can cause energy waste during no-load operation and can generate vibration during operation are effectively solved.

The invention discloses an electric drive winch energy recovery control method, system and device and a medium, and belongs to the technical field of battery management control technologies. The electric drive winch energy recovery control method comprises the steps that the maximum pulse recharging power and the current charge state of a power battery at the current moment are determined; if the winch lowering instruction is received, a winch motor is controlled to conduct lowering according to the speed corresponding to the winch lowering instruction; the current gravitational potential energy feedback power generated in the descending process of the winch motor is detected, the average value of the current gravitational potential energy feedback power in the preset period is calculated, and the average feedback power is obtained; and determining a recharging strategy according to the maximum pulse recharging power, the current charge state and the average feedback power, and adjusting the recharging power of the target device to the power battery according to the recharging strategy. According to the invention, the safety of the recharging process of the power battery of the extended-range electric engineering machinery can be improved.

The utility model discloses an energy feedback type bipolar pulse drive circuit suitable for an excimer lamp. Comprising a direct-current power supply, a first resonant inductor (L1), a second resonant inductor (L2), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a fifth diode (D5), a sixth diode (D6), a seventh diode (D7), an eighth diode (D8), a first resonant capacitor (C1), a second resonant capacitor (C2), a first power switch tube (Q1), a second power switch tube (Q2) and a boosting transformer with a center tap. The drive circuit disclosed by the utility model not only can generate high-frequency bipolar pulse excitation waveforms on the excimer lamp, but also is suitable for various loads in different forms, such as an ozone generator and the like.

The invention discloses an automobile fastener production energy consumption optimization control method and system, and relates to the technical field of fastener production, and the method comprises the following steps: obtaining a real-time current waveform signal and a power grid fundamental wave voltage signal of an inversion unit in an energy feedback link, building a phase dynamic drift model through a time difference analysis algorithm, and carrying out the calculation of the phase dynamic drift model; continuous mapping of energy flow direction change is formed on a time axis; and based on the established phase dynamic drift model, extracting an offset rate continuous change section between the current waveform and the power grid fundamental wave, constructing a phase trend prediction function by using a sliding window algorithm, and converting the time characteristic of the energy flow direction change into a phase prediction signal trajectory. Through phase dynamic drift modeling and lead compensation control, synchronization of feedback current and power grid voltage is realized, and ripple current and element stress are reduced; and through energy density change rate extraction and dynamic filtering regulation and control, the energy flow is stable and continuous, and efficient and energy-saving control over fastener production is achieved.

The invention discloses a tuned mass vibration damper with controllable damping, and relates to the field of vibration control of offshore wind power generation equipment structures. The mass damping unit is arranged in a suspended mode, the clamping ring is coaxially arranged, the electromagnetic damping units are evenly distributed in the circumferential direction of the clamping ring, and the electromagnetic damping units are connected with the mass damping unit through winding ropes which are arranged in a radial mode to form a multidirectional synergistic composite damping system; the mass damping unit generates reverse inertia force in vibration to restrain movement of the tower and drives the electromagnetic damping unit to act at the same time, the generator is driven to generate electromagnetic damping through the one-way bearing and the speed increaser, and lossless reset is achieved through the torsion ring. The device is integrated with an energy recovery unit, vibration energy is converted into electric energy to be stored, real-time regulation and control of damping force, omni-directional vibration response and energy feedback are achieved, and the vibration reduction efficiency and the energy utilization rate are remarkably improved.

The utility model relates to the technical field of elevator energy saving, in particular to an elevator energy-saving energy feedback control device which comprises a control cabinet body, an energy feedback frequency converter, a controller, a sliding assembly and a heat dissipation assembly, the heat dissipation assembly comprises fan blades, a connecting rod, a supporting frame, a filter screen, a driving component and a cleaning component, and the fan blades are fixedly installed on the connecting rod. The connecting rod is installed in the control cabinet body through the driving component, the control cabinet body is provided with ventilation holes, the supporting frame is fixedly installed on the ventilation holes, the filter screen is fixedly installed on the supporting frame, the cleaning component is installed on the control cabinet body, the energy feedback frequency converter and the controller can emit heat in the using process, the connecting rod is made to rotate through the driving component, and therefore the energy feedback frequency converter and the controller can be cleaned. The fan blades are driven to rotate, so that external air enters the control cabinet body through the filter screen, the emitted heat is effectively dissipated, the temperature in the control cabinet body is reduced, and the service life of components is prolonged.

The invention discloses a control method of a cooperative energy feedback suspension system, and belongs to the technical field of vehicle suspension systems, and the control method comprises the following steps: S01, information acquisition; s02, road condition judgment; s03, performing disconnection control on the stabilizer bar; s04, connecting and controlling the stabilizer bar; s05, energy recovery and output control; s06, carrying out smoothness control; and S07, performing dynamic adjustment. The method has the beneficial effects that by intelligently judging the vehicle driving state and the road condition, connection and disconnection of the active stabilizer bar and energy recovery and output strategies of the shock absorber and the active stabilizer bar are flexibly controlled according to different working conditions. Under various complex working conditions such as turning, hollowing and bumping, the system can efficiently recover energy, the application range of energy recovery is remarkably expanded, the total energy recovery amount is increased, then the endurance mileage of a battery is prolonged, and the problems that in the prior art, the energy recovery efficiency is low, and the application range is limited are solved.

A V2G charging / discharging system and a control method and device therefor, and a computer readable storage medium. The control method comprises: if a power grid is at peak electricity consumption, determining a first-type electric vehicle capable of feeding energy back to the power grid within a preset distance range of a V2G charging / discharging system, and a first energy feedback income from the first-type electric vehicle feeding energy back to the power grid; sending the first energy feedback income to the first-type electric vehicle; and upon detection that a second-type electric vehicle that sends information indicative of feeding energy back to the power grid in the first-type electric vehicle is connected to a V2G charging / discharging device, controlling the V2G charging / discharging device to feed energy back to the power grid. In this way, an electric vehicle capable of feeding energy back to a power grid can be automatically determined, and a corresponding energy feedback income is generated, so as to conveniently and quickly guide a vehicle owner to make a decision, thereby increasing the probability of the vehicle owner authorizing the electric vehicle to feed energy back to the power grid, achieving high vehicle owner participation, improving the utilization of the V2G charging / discharging system, and then effectively adjusting power grid load fluctuation.

The invention discloses a hydropower station underground powerhouse environment temperature and humidity monitoring and analysis method and system, and relates to the technical field of temperature and humidity monitoring, and the method comprises the steps: collecting temperature and humidity data in an underground powerhouse in real time, carrying out the preprocessing, transmitting the data to a central processing unit through a wireless transmission technology and an encryption communication protocol, and transmitting the data to the central processing unit; establishing a multi-parameter correlation model, performing correlation analysis on the preprocessed temperature and humidity data, equipment operation data and personnel activity data, automatically adjusting ventilation and dehumidification equipment according to a correlation analysis result, intelligently regulating and controlling the temperature and humidity of the environment, and starting a disaster early warning and emergency response mechanism when monitoring that the environment is abnormal. And residual energy generated in operation of the environment control equipment is recovered to a power grid through energy feedback. A plurality of sensors and an energy recovery mechanism are arranged, and the problems that in the prior art, data transmission is lack of safety, regulation and control are not timely, and energy is wasted are solved.

The invention relates to the technical field of hoist safety protection, in particular to a hoist overload protection method, a storage medium and a system. According to the method provided by the invention, parameters such as torque and vibration frequency are collected through a multi-mode sensor, and the parameters are transmitted to a central control unit after edge calculation processing; establishing a three-dimensional mathematical model to calculate a theoretical maximum safety torque; a two-stage early warning mechanism is set, first-stage early warning slows down and starts an intelligent lubricating system, and second-stage early warning cuts off a power supply and brakes after data analysis; and establishing a prediction model by using an LSTM neural network, and generating a maintenance work order. The system comprises a multi-mode sensing module, an edge calculation module, an energy feedback device and the like. And the program stored in the storage medium provided by the invention can realize the corresponding method. Single detection limitation is broken through, the threshold value is dynamically calculated, predictive maintenance and energy recovery are achieved, and the operation safety and reliability of the hoist are improved.

The embodiment of the invention discloses a high-power high-repetition-frequency pulse constant-current discharge circuit and a pulse laser power supply, and the high-power high-repetition-frequency pulse constant-current discharge circuit comprises a multi-phase staggered parallel Buck circuit, an energy feedback circuit and a controller. The controller samples current in the multi-phase interleaving Buck circuit so as to perform time sequence trigger control on switching tubes in the multi-phase interleaving Buck circuit and the energy feedback circuit, so that charging and discharging of an energy storage inductor in the multi-phase interleaving Buck circuit and recovery of residual energy of the energy storage inductor after discharging are realized, and energy waste is reduced.

The invention discloses a pure electric ship battery equalization control system based on a PID algorithm, and the system comprises a battery state monitoring module which is used for monitoring the state parameter of each single battery in a battery pack; the fuzzy self-adaptive PID controller is used for converting the received state parameters into PID parameter adjustment values through fuzzy control and PID control and outputting control signals; the efficient equalization module is used for evaluating the state of each single battery based on the control signal and the state parameter, and formulating an equalization strategy for battery equalization according to the state evaluation result of the single battery; the energy feedback module is used for converting redundant electric energy generated in the battery equalization process into charging electric energy of other single batteries based on an efficient DC-DC converter technology of a high-frequency transformer; and the control module is used for controlling the battery state monitoring module, the fuzzy self-adaptive PID controller, the efficient equalization module and the energy feedback module. And the battery equalization control precision and the energy recovery efficiency are improved.

The invention discloses a frequency quasi-independent controllable double-frequency electrically small rectification circuit, and belongs to the field of radio frequency energy collection. The rectifying circuit comprises a double-frequency matching network, a blocking capacitor, two Schottky diodes, a filter capacitor and a resistive load. The dual-frequency matching network is composed of a capacitor, an inductor and a microstrip line and used for achieving impedance matching of two working frequency points and achieving quasi-independent regulation and control of the positions of the two frequency points by adjusting the value of the inductor and the length of the microstrip line. And the microstrip line is bent for five times so as to realize the miniaturization of the overall structure of the circuit. The blocking capacitor is used for blocking a direct current component and avoiding energy feedback; the two Schottky diodes are used for converting a radio frequency signal into direct current energy; the filter capacitor is used for improving the smoothness of output direct current energy and improving the energy conversion efficiency. The device is compact in structure, adjustable in frequency point position and suitable for a dual-band radio frequency energy collection scene.

The invention provides an unmanned aerial vehicle wireless energy supply method and system based on multiband laser and intelligent tracking and pointing, and relates to the technical field of unmanned aerial vehicle wireless energy transmission. The method comprises the following steps: dynamically selecting a 1064nm or 1550nm laser band according to a real-time distance between the unmanned aerial vehicle and a transmitting end, and shaping a Gaussian beam into a flat-topped beam through a variable-focus collimating lens group; a tracking and aiming mode combining coarse tracking and fine tracking is adopted, in fine tracking, through an infrared beacon and a CCD image servo closed loop, observation noise covariance is dynamically estimated in combination with a Transform-AKF fusion algorithm, and process noise covariance is adjusted in a self-adaptive mode; the offset of the reflection light spots is detected through the reverse reflector to realize jitter compensation; fusing the fine tracking angle and the jitter compensation amount to generate a final aiming instruction; meanwhile, according to energy feedback data and tracking errors of a receiving end, laser output power is adjusted in a self-adaptive mode through a PID algorithm. According to the invention, long-distance, high-precision and self-adaptive unmanned aerial vehicle wireless energy transmission is realized.

The invention discloses an energy feedback device for servo braking, a control method of the energy feedback device and a storage medium. The energy feedback device comprises an energy feedback power board, an energy storage motor and an inertia disc. The energy feedback power board is connected between the control board of the servo driver and the common direct current bus, and the energy feedback power board is used for controlling the rotation state of the energy storage motor according to the actual voltage value and the preset voltage threshold value of the common direct current bus; the energy storage motor is connected with the energy feedback power plate; the inertia disc is connected to a rotating shaft of the energy storage motor. According to the technical scheme provided by the embodiment of the invention, the energy generated by servo braking can be effectively stored, fed back and utilized, and the technical problem that the energy generated by braking cannot be effectively stored, fed back and utilized in the prior art is solved; and the bus capacitor and the power module of the servo driver can be well protected on the basis of saving the cost.

The present invention discloses a mechanical energy storage elevator system based on flywheel energy storage, which includes a load-bearing component and a power component for driving the load-bearing component upward or downward; the load-bearing component includes a car and a counterweight; the power component includes a traction rope, a guide wheel, a driving wheel, a gearbox, a motor and a flywheel; the traction rope is wound around the driving wheel and the guide wheel, and the two ends are respectively connected to the car and the counterweight; the motor is connected to the driving wheel through the gearbox, and the power is transmitted to the driving wheel through the gearbox; the flywheel is connected to the driving wheel through the gearbox, and the mechanical energy of the driving wheel is received and stored by the gearbox. By utilizing flywheel energy storage, the present invention can recycle the gravitational potential energy of the elevator when it is empty and when it is fully loaded. It not only solves the fire protection and safety problems caused by the elevator's electrical energy storage, but also avoids the impact of elevator energy feedback and harmonics on the power grid, improves energy utilization efficiency, reduces elevator energy consumption, and thus reduces building energy consumption.

The invention discloses an elevator energy feedback and energy storage system, and belongs to the field of energy feedback. Comprising a super capacitor cabinet, the super capacitor cabinet comprises a cabinet body frame, and the side surface of the cabinet body frame is provided with ventilation mesh holes; the dehumidification module is arranged on the inner wall of the cabinet body frame, and the dehumidification module is used for removing moisture in the super capacitor cabinet; the dust removal module is arranged on the side face of the cabinet body frame and used for synchronously cleaning the ventilation mesh holes along with falling of the dehumidification bag; and the collection module is arranged on the dehumidification module, and the collection module is used for collecting the dust falling into the super capacitor cabinet. According to the elevator energy feedback and energy storage system, a dehumidification bag is automatically replaced through the dehumidification module, and low-frequency inspection is adapted; the dust removal module cleans the ventilation mesh holes through mechanical linkage; the collecting module collects dust through an air curtain and a drawer. The three synergistically guarantee dehumidification, ventilation and dust prevention, reduce the risk of short circuit, and ensure long-term reliable operation of the elevator energy storage system.

The invention discloses a relativistic magnetron with an energy feedback structure, and belongs to the technical field of microwaves. The relativistic magnetron is of a full-cavity extraction structure and comprises an anode, a cathode, an energy extraction structure and a guide magnetic field coil. According to the energy extraction structure, an annular microwave reflecting plate is adopted in an output circular waveguide part, part of energy is reflected back to a gap between a cathode and an anode, the interaction between electron cloud and space electromagnetic waves is enhanced, and the output power of a relativistic magnetron is improved. According to the relativistic magnetron, the output power of the relativistic magnetron is effectively improved while the compactness of the device is ensured; meanwhile, the energy feedback structure is simple and easy to process.

The invention provides a laser additive manufacturing control method, device and equipment based on energy feedback. The method provided by the invention comprises the following steps: pre-fitting a first corresponding relation between laser power variation and deposition rate variation, a second corresponding relation between scanning speed variation and deposition rate variation and a third corresponding relation between light spot diameter and deposition rate variation; the current actual deposition rate is determined, and the deposition rate deviation value is determined according to the actual deposition rate and the expected deposition rate; the deposition rate deviation value serves as input of a PID control algorithm, and control output quantity is determined; determining the change direction of the laser power and the change direction of the scanning speed according to the deposition rate deviation value; determining a laser power variation, a scanning speed variation and a light spot diameter variation; and respectively adjusting the laser power, the scanning speed and the light spot diameter. The laser additive manufacturing control method based on energy feedback is used for achieving accurate control and optimization of the micro additive manufacturing process.

The invention relates to a real-time dynamic measurement and control system and method for an empty roof distance of a coal mine tunnel based on energy feedback. According to the system, a multi-dimensional monitoring assembly comprises a drill hole, a roof multi-dimensional sensing module and a bottom plate reference target; the top plate multi-dimensional sensing module comprises a pressure-bearing shell, a quick-insertion type anchor rod, an X / Y / Z-direction stress sensor, a laser range finder, a processor I and a pre-pressing adjusting nut; the tail section of the quick-inserting type anchor rod is anchored in a drill hole, and the pressure-bearing shell is pressed on a top plate through the pre-pressing adjusting nut; the bottom plate reference target is correspondingly mounted on a bottom plate of a roadway; the edge intelligent sensing box is arranged in the roadway and comprises an outer shell and a processor II; the method comprises the following steps: synchronously acquiring X / Y / Z three-dimensional stress data and overhead distance data, sequentially calculating a three-dimensional energy accumulation value, a safety coefficient and a maximum overhead distance, then carrying out graded early warning, and meanwhile, sending monitoring data and early warning information to a monitoring server through a wireless access point. According to the system and the method, the roof rock mass stress and the empty roof distance can be monitored intelligently.