52 results about "Control principle" patented technology

The invention relates to the technical field of industrial process automation control, and discloses an intelligent adjusting method for an industrial waste liquid low-temperature evaporation process, which comprises the following steps of: superposing pressure step test excitation to a vacuum adjusting valve, synchronously acquiring temperature response data flow, calculating absolute error integral and SIAE and reply time characteristics of a response curve, and calculating the temperature response data flow according to the absolute error integral and SIAE and reply time characteristics of the response curve; substituting into an inverse model to solve an equivalent process gain and a time constant of the controlled object; based on the internal model control principle, PID controller parameters are dynamically calculated and updated through the calculated gain and the time constant, a control law is reconstructed to generate an execution instruction, and the problem of control divergence of a non-linear time-varying object under model mismatch is solved through active energy feature identification and a pole assignment mechanism; decoupling control and self-adaptive adjustment of fluid viscosity sudden change and equipment scaling are achieved, and the stability and control precision of the system are improved.

The application discloses a light / sound early warning method based on a vehicle distance, an intelligent cockpit and a vehicle thereof, and belongs to the technical field of intelligent control, and comprises the following steps: acquiring distance information of a host vehicle and a preceding vehicle through a vehicle-mounted sensor; detecting a distance change value of the host vehicle and the preceding vehicle in real time, generating a following vehicle strategy based on a PID control principle, comparing the distance change value with a preset threshold value, and judging whether the current distance change value reaches the preset threshold value; if the current distance change value reaches the preset threshold value, a light warning signal is sent through a vehicle-mounted light system, and a sound prompt signal is sent through an in-vehicle sound system. The early warning method provided by the application is combined with light reminding and sound prompting, when the system detects that the distance from the preceding vehicle is too close or there is a dangerous behavior, warning information is timely transmitted to the driver through flashing warning lights and sound prompting, so that the driver takes corresponding measures to ensure driving safety.

The invention relates to a model prediction control method and device for dynamically adjusting a prediction range. The method comprises the following steps: performing one-beat delay compensation on a motor system according to sampled data, and adjusting a prediction range of the one-beat delay compensation according to an actual switching frequency of the motor system at the current moment and a preset target switching frequency; calculating a reference voltage vector of the motor system based on a current dead-beat control principle, and performing space vector modulation on the reference voltage vector based on a volt-second balance principle to obtain a plurality of candidate voltage vector sequences; and selecting the candidate voltage vector sequence with the minimum harmonic current effective value as an optimal voltage vector sequence, and controlling the action of the motor system at the future moment according to the optimal voltage vector sequence. According to the method provided by the invention, the current harmonic is relatively small by adjusting the prediction range, limiting the switching frequency and screening the voltage vector sequence, so that the steady-state performance of the motor system is improved.

The invention discloses a multi-point distributed optical storage cooperative control method and device and a storage medium, and relates to the technical field of optical storage cooperative control, and the method comprises the steps: building an active anti-interference control model based on a virtual synchronous generator control principle according to the device parameters of each distributed optical storage system; constructing a voltage cooperative control model based on the Ressel invariance theorem; constructing an energy storage cooperative control model based on the energy storage charge state time sequence dependency relationship; a state space sharing strategy is utilized to associate the voltage cooperative control model and the energy storage cooperative control model to construct a cooperative control model; outputting an active disturbance rejection control strategy based on the active disturbance rejection control model; based on the disturbance elimination result, judging whether to call a cooperative control model to output a cooperative control strategy according to the power grid real-time operation data; and executing distributed optical storage control according to the active disturbance rejection control strategy or / and the cooperative control strategy. The method has the beneficial effect that the stability and adaptability of cooperative control of the distributed optical storage system are improved.

The utility model discloses an external reversing valve which comprises an upper valve body. The reversing sliding block is arranged in a cavity of the upper valve body in a sliding mode. The electromagnetic valve and the relay are connected with the side part of the upper valve body; the reversing pistons are arranged in pairs and connected with the two sides of the reversing sliding block respectively. The lower valve body is connected with the upper valve body, and an oil inlet channel and an oil return channel which are communicated with an excavator oil cylinder are formed in the lower valve body. According to the reversing valve, due to the oil liquid reversing control principle and the innovative structural arrangement of all parts, the sensitivity of the reversing piston in the reversing valve to oil liquid impurities is reduced, the situation that the reversing piston is stuck is not prone to occurring, the service life of the whole reversing valve is prolonged, the reliability of the whole reversing valve is improved, and crushing operation is guaranteed.

The invention discloses a self-adaptive control method and system for an electric shovel working device based on danger situation assessment, and belongs to the technical field of electric shovel collision avoidance. According to the method, a multi-layer working device operation danger situation comprehensive evaluation system is established, multi-source information such as the operation speed, the current position and the operation intention of a driver is comprehensively considered, and a danger situation evaluation problem is regarded as a mixed multi-criterion decision problem. And quantitative evaluation is carried out by using a TTC risk evaluation model, and anti-collision pre-decision making is carried out based on a feedforward control principle. Meanwhile, a decision evaluation and correction mechanism is introduced, and a control strategy is dynamically judged and corrected by calculating a danger situation change rate, so that a reliable closed loop is formed. The defects that in the prior art, single position information is relied on, the braking strategy is stiff, and state feedback is lacked are overcome, smooth and self-adaptive anti-collision control is achieved, equipment impact and abrasion are effectively reduced, the reliability of a control system is improved, and the service life of equipment is prolonged.

1. The name of the design product: airplane horizontal stabilizer control intelligent teaching equipment. 2. The use of the design product: for the control principle teaching of airplane horizontal stabilizer in airplane maintenance training course. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view. 5. The bottom of the design product is the part that is not easy to see or cannot be seen during use, so the top view is omitted.

This invention discloses a method and system for on-site simulated interlocking testing of railway signals, relating to the field of interlocking testing technology. The method includes: generating a configuration table of individual equipment simulation test data based on the equipment layout diagram of the test station; compiling a template file for generating individual equipment test steps based on the configuration table and the control principle diagram of the test station equipment; generating different individual equipment test tables based on the configuration table and the template file; analyzing all conditions requiring inspection in the template file based on the computer interlocking status, button information, and relay action information in the relay assembly rack to determine the interlocking test items; and managing the current test data of the station to be tested. This invention enables monitoring from operation to status during the simulation test, improving the completeness and accuracy of the simulation test.

The application provides a wind storage power station frequency modulation control method and device, wherein the wind storage power station frequency modulation control method comprises the following steps: obtaining power grid frequency data of a power grid connected to a wind storage power station, first group frequency modulation data of each energy storage unit in an energy storage device, and second group frequency modulation data of each wind turbine generator set in a plurality of wind turbine generator sets; determining first power released by the wind storage power station by using a droop control principle based on the power grid frequency data; further determining second power released by the energy storage device; and determining power reference values of each wind turbine generator set in the wind storage power station based on the first power released by the wind storage power station, the second power released by the energy storage device, and the second group frequency modulation data of each wind turbine generator set, so as to control the power grid frequency of the wind storage power station. The application can solve the technical problem of how to coordinate the active power released by each wind turbine generator set in the wind storage power station and the active power released by the energy storage device, and realize short-term stability of the power grid frequency connected to the wind storage power station.

The application provides a conflict elimination model and method for a weaving area of a quick exit ramp and a connection road section of an intersection. According to the optimization theory and the rolling horizon control principle, the conflict elimination model adopts a linear programming expression form, and takes the maximum average driving speed of all vehicles as an optimization target. Constraint conditions are set in the light of traffic safety and efficiency, including vehicle weaving decision constraints, safety distance constraints and vehicle dynamics constraints. The weaving vehicle is separated in time and space, the passing right of the vehicle in the area is orderly controlled, the purpose of zero conflict of the vehicle driving is achieved in the model control range, and the traffic passing efficiency of the road section is improved to a certain extent.

This application discloses a control testing method, apparatus, system, and program product for construction machinery. Relating to the field of construction machinery technology, the method includes: acquiring electrical signals generated from operating components for controlling actuators, and matching the electrical signals with corresponding operating actions to form a corresponding control mapping relationship; generating control signals based on the control mapping relationship to drive the actuator using either a host computer or a physical input device. By matching and analyzing the electrical signals of the operating components and establishing control mapping relationships, a structured expression of the control principle of construction machinery can be achieved, and control signals can be generated based on the control mapping relationship, realizing integrated processing of control principle detection and control testing, improving testing efficiency and consistency.

The embodiment of the invention provides a power supply controller of a multi-phase power supply and a control method. The power supply controller comprises a pulse enhancement unit, a transient monitoring unit, a signal selection unit and a multi-phase control unit, the transient monitoring unit is used for monitoring the voltage output state of the multi-phase power supply; the multi-phase control unit is used for providing PWM signals with fixed phase difference based on a constant on-time control principle in a steady state, and providing the PWM signals to a power switch of the multi-phase power supply through the signal selection unit, so that the power switch can perform switching state switching according to the PWM signals to supply power; the pulse enhancement unit is used for providing enhanced pulse signals with the phase difference according to the preset pulse width and number when the transient monitoring unit monitors a serious transient event, and providing the enhanced pulse signals to a power switch of the multi-phase power supply through the signal selection unit; therefore, the power switch performs switch state switching according to the enhanced pulse signal so as to respond to the serious transient event.

This application discloses a vehicle power take-off torque control method, device, equipment, and storage medium, relating to the field of new energy commercial vehicle technology. The method includes: acquiring a rotational speed value, a proportional-integral coefficient, and a proportional-speed difference; calculating a proportional control torque and an integral control torque based on the rotational speed value, the proportional-integral coefficient, and the proportional-speed difference; and adjusting the vehicle's power take-off torque based on the rotational speed value, the proportional control torque, and the integral control torque to maintain constant speed driving. This application utilizes the proportional-integral control principle to calculate the proportional control torque and integral control torque. The operation is simple and saves calibration effort in practical applications, thereby limiting overshoot and precisely adjusting the vehicle's power take-off torque. This achieves constant speed control of the motor in driving power take-off mode, automatically adapting to road conditions and load changes. Furthermore, the driver does not need to manually adjust the accelerator and brake pedals, effectively reducing the driver's workload and significantly improving vehicle performance and work efficiency.

This invention belongs to the field of coking dry quenching production technology, specifically based on an intelligent control method for the temperature of circulating gas after the heat pipe heat exchanger in dry quenching. This method abandons the traditional method of relying on temperature detection, audible and visual alarms, and manual control of the amount of demineralized water entering the heat pipe heat exchanger. By setting a circulating gas temperature detection point after the heat pipe heat exchanger, a demineralized water flow detection point at the point of entry into the heat pipe heat exchanger, and a demineralized water flow regulating valve, a cascade regulation loop is constructed based on the PID control principle. The circulating gas temperature after the heat pipe heat exchanger is used as the main regulating parameter, and the demineralized water flow rate entering the heat pipe heat exchanger is used as the secondary regulating parameter. This achieves automatic and precise control of the demineralized water flow rate entering the heat pipe heat exchanger, effectively improving the stability of the circulating gas temperature after the heat pipe heat exchanger, reducing corrosion of pipelines and the inner wall of the dry quenching furnace, preventing tube rupture accidents, improving the safety of the production process, optimizing heat exchange efficiency, saving labor costs, and achieving a high level of automation in dry quenching production.

The invention discloses a fault detection method, a fault detection circuit and electronic equipment. The fault detection method comprises the following steps: acquiring an alternating current input characteristic parameter and an inverter output characteristic parameter of a bidirectional inverter circuit; detecting whether a first error value between the alternating current input characteristic parameter and the inversion output characteristic parameter is smaller than a first threshold value or not; if the first error value is smaller than a first threshold value, disturbance adjustment is carried out on the inversion output characteristic parameters; detecting whether a second error value between the alternating current input characteristic parameter after disturbance adjustment and the inversion output characteristic parameter is smaller than a second threshold value or not; if the second error value is smaller than the second threshold value, fault alarm is triggered. By means of the mode, the fault detection method can still be effectively achieved even when the alternating current input switch is normal, by using a software algorithm, hardware cost is not increased, the control principle is simple, chip resources are not occupied, and engineering implementation is easy.

This invention discloses a flow calibration device for open channel weirs and flumes based on mechanical control principles, relating to the field of flow meter calibration technology. The device includes an open channel to be tested, connected to an inlet assembly comprising a standard flow meter. The open channel includes a Parshall flume connected to the flow meter under test. The flow meter reads the upstream and downstream water levels within the Parshall flume. A lifting assembly is located downstream of the Parshall flume, comprising a lifting plate that moves up and down. Fluid flows over the lifting plate, controlling the downstream water level. The flow meter, based on the upstream and downstream water levels and preset submerged flow correction data, obtains the corresponding submerged flow rate and compares it with the standard flow rate obtained from the standard flow meter. By controlling the downstream water level, the open channel weirs and flumes flow meter is placed in a set submerged flow state, and the submerged ratio is adjustable, achieving the effect of conveniently calculating the flow indication error of the open channel weirs and flumes flow meter under different flow parameters.

This invention discloses a smart vibration-damping workbench and vibration reduction method based on pressure-displacement conversion vibration detection. The vibration-damping workbench includes a base plate, an execution system, a lifting and fixing system, a control system, and a measurement system. The execution system performs adaptive vibration reduction; the lifting and fixing system is used to adjust the position of heavy workpiece blanks; the control system is used to control the support strength of the execution system; and the measurement system is used to detect and provide feedback on the vibration intensity of the execution system. The vibration reduction method includes pre-processing preparation, maintaining constant pressure in the execution system during processing, suppressing vibrations generated during processing, and unloading and pressure recovery steps after processing. This invention utilizes the ingenious conversion between air pressure and displacement, amplifies vibration changes through a linkage mechanism, and combines PID control principles to improve detection accuracy, control speed, and intelligence, ensuring effective support and vibration suppression for the processing of heavy workpiece blanks.

The invention discloses a control method, device and equipment of an online liquid preparation system and a medium, and relates to the field of industrial process automatic control. The method comprises the following steps: acquiring a preparation data set of an online liquid preparation system in a preparation process; the preparation data set comprises a liquid preparation control parameter sequence and an index parameter sequence; constructing a transfer function model of the online liquid preparation system according to the preparation data set, and identifying initial parameter values in the model; constructing a target cost function by considering a mean square error of the transfer function model, a control parameter change penalty term and a regular term of a model parameter; based on the initial parameter value and the target cost function, performing iterative optimization on model parameters in the transfer function model by adopting an optimization algorithm to obtain optimal model parameters; determining a fuzzy PID controller by adopting a fuzzy control principle according to the optimal model parameters; and a fuzzy PID controller is adopted to adjust the liquid preparation control parameters at all moments. According to the invention, accurate and stable control of the liquid preparation control parameters of the liquid preparation system can be realized.

The invention relates to a gas turbine rotatable guide vane feedback abnormity checking method, which is based on a guide vane control principle, points out conditions of single-cylinder alarm, double-cylinder alarm, non-alarm actual angle abnormity and the like, performs classified checking through fault phenomenon analysis, and is comprehensive in analysis, clear in logic and high in accuracy. The reason for feedback abnormity of the rotatable guide vane can be accurately positioned, and the method has important significance for recovering stable operation.

This invention provides a hydraulic system and control method for a coke quencher. The system includes a pump station hydraulic system and a valve station hydraulic system. The valve station hydraulic system includes a gate trolley forward / backward control circuit, a coke guide grid movement control circuit, and at least one actuator circuit. The pump station hydraulic system adopts the control principle of an AC servo motor paired with a vane pump. The gate trolley forward / backward control circuit uses an electro-hydraulic directional valve, and the coke guide grid movement control circuit uses an electro-hydraulic directional valve and two superimposed check valves. This invention overcomes the problems of overheating and high energy loss in existing coke quencher hydraulic systems. By eliminating the use of proportional directional valves, the contamination level of the hydraulic medium can be reduced. The improved hydraulic control principle for the gate trolley and coke guide grid movement enables the coke quencher to operate efficiently, stably, and energy-savingly.

The application relates to the technical field of industrial process automation control, and discloses an intelligent adjustment method for an industrial waste liquid low-temperature evaporation process, which comprises the following steps: superimposing a pressure step test excitation on a vacuum adjustment valve and synchronously collecting a temperature response data stream, calculating an absolute error integral of a response curve, SIAE and a recovery time characteristic, and substituting the absolute error integral, the SIAE and the recovery time characteristic into an inverse model to solve an equivalent process gain and a time constant of a controlled object; based on an internal model control principle, PID controller parameters are dynamically calculated and updated by using the solved gain and time constant, a control law is reconstructed to generate an execution instruction, through active energy characteristic identification and a pole configuration mechanism, the application solves a control divergence problem of a nonlinear time-varying object under model mismatch, realizes decoupling control and self-adaptive adjustment of fluid viscosity mutation and equipment fouling, and improves the stability and control precision of a system.

The invention discloses a motorcycle and an electronic damping adjusting method thereof. The motorcycle comprises a motorcycle frame, a motorcycle body covering part, a walking system, a suspension system, a power system and a control system. The control system comprises a sensor, and the sensor acquires detection data; the control system comprises an ECU (Electronic Control Unit) for acquiring the vehicle state of the motorcycle; the ECU receives detection data sent by the sensor; the ECU identifies and judges the driving state and the driving road condition of the current motorcycle according to the vehicle state and the detection data; the ECU calculates ideal damping of the motorcycle running in a running state under the running road condition according to the ceiling damping control principle; an F-I-V topological graph indicating the relation between damping, control current and vehicle speed is stored in the ECU, the F-I-V topological graph is inquired according to the ideal damping and vehicle speed obtained through calculation, and the corresponding control current is obtained; the ECU outputs a control current to control the suspension system to achieve ideal damping. By means of the arrangement, the electronic damping structure of the motorcycle is simple, and the adjusting result is accurate.

The invention provides a micro-grid group double-layer elastic distributed control method for resisting FDI attack, and relates to the technical field of micro-grid group safety control. The method comprises the following steps: establishing a micro-grid distributed control model according to a double-layer communication topology and droop control principle of a micro-grid cluster; according to the micro-grid distributed control model, the false data injection interference signal and the upper bound of the time derivative of the false data injection interference signal, a fixed time interference estimator is determined, and the fixed time interference estimator is used for estimating interference at fixed time; according to the micro-grid distributed control model and the fixed time interference estimator, a double-layer elastic controller is determined, and the double-layer elastic controller is used for achieving recovery of frequency and voltage of the micro-grid cluster and achieving sharing of active power of the micro-grid cluster at the same time. In this way, the FDI interference signal observation speed is high, and the system stability of the micro-grid cluster is high.

The invention discloses a permanent magnet synchronous motor predictive direct speed control method considering maximum torque current ratio trajectory operation, and relates to the field of motor control, the method comprises the following steps: obtaining a load torque sliding mode observation value at the Kth moment and a motor rotating speed estimation value at the Kth moment through a sliding mode load torque disturbance observer; obtaining a motor rotating speed estimation value at the (K + 1) th moment through a permanent magnet synchronous motor mechanical model; obtaining a reference torque based on a dead-beat control principle; based on the reference torque, obtaining a dq-axis reference current of maximum torque current ratio track operation; obtaining a reference voltage vector based on a dead-beat control principle according to the dq-axis reference current; and determining an optimal voltage vector based on the reference voltage vector and the inverter candidate voltage vector, and realizing prediction direct speed control of the permanent magnet synchronous motor according to the optimal voltage vector. The control process is simplified, it is guaranteed that the stator current always runs along the maximum torque-current ratio track, and maximum torque output and high-efficiency running are achieved.

This utility model belongs to the technical field of cigarette packaging machines, and discloses a small box rejection and separation device for cigarette packaging machines. It includes a mounting base plate, a protective shell plate at the top of the mounting base plate, a flip-plate separation assembly on the upper part of the protective shell plate, and an electrical control box and two rejection bins placed on the mounting base plate at the lower part of the protective shell plate. The flip-plate separation assembly includes a separation guide box located at the top of the protective shell plate. This utility model has high versatility and is suitable for small box QR code rejection and separation in ZB45 / 25, GDX1 / X2, and ZB47 models. The reasons for small box rejection mainly include rejection due to appearance problems and rejection due to QR code problems. This device can accurately and quickly distinguish the specific reasons for small box rejection, facilitating subsequent classification and processing. The control principle is simple, the structure operates smoothly, and it will not damage the rejected cigarette boxes. The overall size of this rejection and separation device is small, occupying little space in the original machine, and its external installation is simple and has no impact on the original machine's condition.

The invention relates to the technical field of industrial automation control, in particular to a PID output self-adaption-based temperature control overshoot suppression method, which comprises the following steps of: calculating a PID value based on a position type PID control principle, and designing a variable integral strategy for an integral item; calculating a time-sharing saturation state bit H (0 is unsaturated and 1 is saturated); dynamically adjusting a proportional term according to the desaturation temperature to obtain an adaptive output PIDout; selecting control quantity output logic according to H; and converting the control quantity into a PWM duty ratio to control the heater. According to the method, through dynamic self-adaptive output and time-sharing saturation judgment, one set of PID parameters is adapted to multi-target temperature, and overshoot is effectively restrained; the steady-state precision is ensured by the variable integral strategy, and all strategies are enabled / disabled on demand. The problems that in the prior art, PID parameter adaptability is poor, parameter adjusting cost is high, and overshoot is serious can be effectively solved.

The application discloses a control method for reducing DC side voltage fluctuation of a permanent magnet synchronous generator system, and aims at problems of the permanent magnet synchronous generator system under traditional double closed-loop control, such as large output voltage fluctuation when the load changes, slow dynamic response and the like, and proposes a load current disturbance observer based on a supercoil algorithm, and feeds forward disturbance obtained by the disturbance observer to an output end of a voltage outer loop, so as to improve the anti-disturbance ability of the output voltage to the load change. In addition, in order to ensure the followability and robustness of the system, a two-degree-of-freedom PI controller based on the internal model control principle is used to replace the traditional voltage outer loop PI controller. The control method disclosed by the application does not need to increase the cost of additional hardware, and the control principle is simple, and has better dynamic performance and the ability of resisting load disturbance than the traditional double closed-loop control.

This invention relates to the field of crusher technology, and more particularly to an intelligent control system and method for a dust crusher based on wireless communication technology. It includes: a monitoring module for real-time detection of the motor current value of the dust crusher; a wireless communication module electrically connected to the monitoring module for converting the detected motor current value into a wireless signal for transmission; a purging device for purging large pieces of material between the two rollers of the dust crusher; and an intelligent control module electrically connected to both the wireless communication module and the purging device, receiving the motor current value detected by the monitoring module and controlling the purging device to purge excessively accumulated material from the dust crusher. This system not only automatically removes clogged material between the rollers, but also features a simple and efficient control principle, stable operation, and extended service life of the crusher.

The invention discloses a robust predictive current control method and device for a three-phase T-type three-level inverter system, and belongs to the field of grid-connected control. A power grid current robust prediction model is obtained through lumped disturbance modeling, and lumped disturbance and a power grid current estimated value are obtained through an extended state observer; obtaining an inverter reference voltage vector according to a dead-beat control principle; defining 48 groups of candidate voltage vector sequences, and determining an optimal vector sequence according to a reference voltage vector position and a neutral-point potential balance condition; calculating power grid current gradient values corresponding to the three basic voltage vectors in the optimal vector sequence; designing an increment and accumulation type value function, and solving the action time of each vector in the optimal vector sequence through a Lagrange multiplier method; and converting the vector action time into a switching signal to realize robust predictive current control. According to the method, dependence on model parameters is effectively reduced, active balance of the neutral-point potential is realized, and robustness and steady-state precision of the inverter under a grid-connected working condition are remarkably improved.

The invention relates to a cooperative regulation and control method and system for multiple reactive power compensation devices in a power distribution area. The method comprises the following steps: establishing a multi-element cooperative regulation and control model for the reactive power compensation devices in the area based on a target cascade control method; acquiring initial data of a power distribution area, determining an operation state of the power distribution area and performing linear processing; according to the processed operation state, solving the multi-element coordinated regulation and control model by adopting a target cascade control principle; establishing a target function for cooperative regulation and control, and performing cooperative regulation and control on the multiple reactive compensation devices in the power distribution area by adopting a target cascade control method, so that the target function continuously approaches the requirements of the power distribution area; and completing the design of the cooperative regulation and control method for multiple reactive power compensation devices in the power distribution area based on target cascade control.