10results about How to "Solve overshoot" patented technology

The invention discloses a photoelectric turntable servo tracking control method, a storage medium and a system, and relates to the technical field of servo control, and the method comprises the steps: receiving target deviation value information; caching the actual position information for a corresponding time length based on the target calculation and the transmission delay time length, and using the actual position before transmission and calculation when processing the target deviation information, so that the target deviation is consistent with the actual position information in time, and the target position is obtained; according to the target deviation and the actual position information, a predicted speed is calculated and output through feedforward control, the obtained target position is input into a position ring to obtain speed output, and the speed output and the predicted speed input are combined to a speed ring. According to the established data caching and feed-forward compensation model, the servo system compensates system predictive interference in advance, carrier motion and other interference factor influences are effectively restrained, response delay is reduced, the system tracking precision is improved, the dynamic response speed is increased, and real-time smooth tracking control is achieved.

The invention relates to the technical field of digital twinning simulation, in particular to a digital twinning-based temperature and humidity verification box multi-physics field real-time monitoring method, which comprises the following steps of: constructing a digital twinning grid index system, and solving a no-load flow field by using CFD (Computational Fluid Dynamics) simulation to obtain reference turbulent energy; obtaining geometric data of a to-be-detected device, mapping the to-be-detected device to the digital twin grid index system by using a voxelization algorithm, and calculating a thermal inertia correction coefficient; the flow field is iteratively solved based on the thermal inertia correction coefficient, a source item is generated by applying the virtual resistance density and the turbulent energy, and real-time corrected turbulent energy is obtained through calculation; calculating a reliability weight according to the ratio of the real-time corrected turbulent energy of the grid unit where the sensor is located to the reference turbulent energy, wherein the reliability weight is in negative correlation with the ratio; and weighting the monitoring data by using the reliability weight to realize closed-loop control. According to the method, the problem of monitoring misalignment caused by flow field topology change is effectively solved, and the monitoring accuracy is improved.

The invention relates to the technical field of excavators and discloses a pilot control system and method and a storage medium and system.The pilot control system comprises a main pump, a pilot pump, a motor, a pilot valve, a main valve, a force arm oil cylinder and an oil tank; the main pump, the main valve, the force arm oil cylinder and the oil tank are connected through an oil supply loop. The motor is arranged at the end of the pilot valve and used for pushing the pilot valve to control opening and closing of the pilot valve. A pilot hole of the main valve, the oil tank, the pilot pump and the pilot valve are connected through an oil supply loop. Electromagnetic control is replaced by mechanical control, the overshoot problem of an existing electromagnetic valve is solved, electromagnetic coils at the two ends of the electromagnetic valve can be omitted, and the problems that the electromagnetic coils are attenuated after durability and the operation performance is reduced can be well solved.

This invention provides a high-precision anti-disturbance control method for UAV gimbals under transient impact loads, belonging to the field of precision servo control technology. It employs a cascade control architecture: the outer loop uses model predictive control (MPC) and introduces control increment constraints to plan an overshoot-free velocity trajectory; the inner loop uses linear active disturbance rejection control (LADRC) and establishes an extended state observer to estimate and compensate for the total disturbance of multi-stage transient impacts in real time. This invention, using the aforementioned high-precision anti-disturbance control method for UAV gimbals under transient impact loads, reduces the settling time to 0.18 s and lowers the maximum dynamic position error during firing to 0.0005 rad, achieving precise steady-state maintenance under high-impact environments.

The invention discloses a high-frequency ultrahigh-voltage pulse voltage and current transformer which is provided with an annular high-frequency pulse current measuring coil assembly surrounding a central ultrahigh-voltage conductor, and the outer layer of the high-frequency pulse current measuring coil assembly is wrapped with a double-shielding layer. The high-frequency ultrahigh-voltage pulse voltage and current transformer is characterized in that the high-frequency pulse current measuring coil assembly comprises a magnetic core, a coil, a distributed load, a planar conductor, a current sampling semi-rigid coaxial cable, a current sampling load compensation resistor and a winding insulating material. The measuring precision is high in performance, stable and reliable, the production and processing cost is extremely low, wireless induction is achieved, and installation is convenient and fast.

The invention discloses a multi-section heating intelligent adjustment control system of a lining teflon elbow heating furnace, and belongs to the technical field of heating furnace temperature control. The system comprises a heating furnace partition sensing module, a partition temperature control execution module, an intelligent regulation and control decision module, a safety protection module and a man-machine interaction module. Multiple parameters are collected through a distributed sensing network, the position of an elbow in the furnace and operation data of the heating furnace are obtained through filtering weighting preprocessing, a temperature rise rate set value is dynamically compensated through a multi-temperature-zone collaborative scheduling unit, and then a regulation and control instruction is generated through a multi-section collaborative PID algorithm with feedforward compensation in combination with fuzzy self-adaptive correction logic. Interlocking type two-way regulation and control of heating and cooling of the Teflon-lined elbow heating furnace are achieved, and meanwhile a safety interlocking protection mechanism is matched. According to the invention, the problems of lag and overshoot of the traditional temperature control of the Teflon-lined elbow heating furnace are solved, the control precision of the sintering temperature of the Teflon-lined elbow heating furnace is improved, the sintering requirements of Teflon-lined elbows with different specifications are met, and the consistency of sintering quality is ensured.

The invention relates to an air conditioner control technology, discloses a variable-frequency air conditioner room load calculation method, a storage medium and an air conditioner system, and solves the problems that in the prior art, a variable-frequency air conditioner cannot be matched with a room load during capacity output due to the fact that the variable-frequency air conditioner cannot recognize the room load, and room temperature fluctuation is large; and the overshoot shutdown phenomenon cannot be avoided. The method comprises the following steps: calculating the output capacity of the air conditioner in real time during the operation of the air conditioner; and a preset time period serves as an iteration period, the room load range under the current indoor and outdoor temperature difference is iterated according to the output capacity, calculated in real time, of the air conditioner and the room temperature change direction, and when the room temperature change converges, the corresponding real-time output capacity of the air conditioner is the current room load. The invention is suitable for variable-frequency air conditioners.

The invention discloses a three-phase hybrid stepping motor control method and system, and relates to the field of motor control, and the control method comprises the steps: obtaining an angle value theta and a convergence rate r which are given and inputted by a user; according to an angle value theta given and input by a user, a convergence speed r and feedback real-time position information, an expected motor torque Te is generated; after an expected d-axis current and an expected q-axis current are generated according to the expected motor torque Te, a d-axis voltage and a q-axis voltage are generated according to the real-time d-axis current and the real-time q-axis current which are fed back; and according to the d-axis voltage, the q-axis voltage and the feedback electrical angular velocity theta e, carrying out inverse transformation to obtain an alpha-axis voltage and a beta-axis voltage, and according to the detected bus voltage Udc, the alpha-axis voltage and the beta-axis voltage, generating a PWM modulation signal so as to drive the three-phase hybrid stepping motor to work. Therefore, the problem of overshoot caused by overlarge error of the initial position can be solved, and the robustness and the dynamic performance of the system are improved through closed-loop control.

The invention discloses a model prediction control method and system for a totem-pole PFC circuit, and belongs to the technical field of totem-pole PFC circuits, and the method comprises the steps: monitoring the input voltage of an AC power supply, the bus voltage of the totem-pole PFC circuit, and load demand information in real time; determining that the totem-pole PFC circuit works in a boost mode or a voltage-multiplying mode and driving signal distribution logic of each switch tube in the bridge circuit; calculating an optimal modulation ratio based on a model prediction control algorithm according to an error between the target bus voltage and the currently detected bus voltage; generating a first SPWM signal with a corresponding duty ratio and a complementary second SPWM signal according to the optimal modulation ratio; and distributing the first SPWM signal and the second SPWM signal to corresponding switch tubes to realize control of the bus voltage. According to the method, the SPWM duty ratio is dynamically adjusted through model prediction control, and rapid, accurate and stable control over the totem pole PFC bus voltage is achieved.

The invention discloses a carrying equipment path planning system based on multi-sensor fusion, and relates to the technical field of automatic control of carrying equipment. The method comprises the following steps: acquiring multi-source fusion data of an external sensor group; the structural response processing unit obtains structural response data in the operation process of the carrying equipment and generates a first correction matrix; the feature quantitative processing unit performs feature quantitative analysis on the multi-source fusion data to generate a first quantitative score and a unit direction vector in a multi-dimensional physical space; the instruction arbitration processing unit performs calculation based on the first correction matrix, the first quantization score and the unit direction vector to generate a first motion vector; the boundary verification processing unit obtains execution boundary data of the carrying equipment and corrects the first motion vector to generate a first control sequence; the signal output unit converts the first control sequence into a pulse width modulation signal and outputs the pulse width modulation signal. According to the method, the steady-state closed loop of the perception income and the execution boundary constraint is realized on the premise of maintaining the physical structure.