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79results about How to "Improve the efficiency of setting" patented technology

Permanent magnet synchronous motor multi-target parameter optimization method based on entropy weight method

The invention discloses a permanent magnet synchronous motor multi-target parameter optimization method based on an entropy weight method. The method comprises the following steps: 1, establishing a permanent magnet synchronous motor vector control Simulink model based on model compensation active disturbance rejection; 2, performing multi-target layering on the permanent magnet synchronous motorvector control system model based on model compensation active disturbance rejection by using a comprehensive evaluation method, and establishing a corresponding evaluation index system; 3, aiming atmultiple indexes under the same performance, adopting an entropy weight method to objectively distribute the weight of each index, and aiming at the overshoot problem of the control system, adopting apenalty function to carry out unconstrained processing; and 4, selecting an optimization objective function, setting and optimizing model compensation parameters by using an NSGA-II algorithm based on non-dominated solution sorting, and performing multi-objective optimization on the response rapidity and stability of the permanent magnet synchronous motor vector control system simulation model based on model compensation active disturbance rejection. According to the design, multi-target parameter optimization is carried out by adopting an objective method, and the setting efficiency of the motor is effectively improved.
Owner:WUHAN UNIV OF TECH

Method, device and system of server fan speed regulation

The invention provides a method, device and a system of server fan speed regulation.The method comprising the following steps that parameters of server fan speed regulation of a server is acquired andinitialized; a test is started, and the log data of the speed regulation control of a fan is acquired and storedaccording to a preset time interval; according to the log data, the rotation speed change of the fan and the temperature change of acontrolled device on the server are calculated; and according to the rotation speed change of the fan, if the temperature change of the controlled device isdetected to be larger than atarget threshold value, the data values corresponding to the parameters are adjusted according to the sensitivity, the log data and the parameters output in the last timeuntil the temperature change of the controlled device is smaller than or equal to the target threshold value. The problem that a traditional PID setting process depends on experience is solved, automatic analysis and high-efficiency treatment of PID fan speed regulation are realized, and the setting process is present in informational and graphical modes, the visual performance of thePID fan speedregulation setting is improved, so that the setting efficiency is improved, the method, the device and the system can be adapted to different servers, and havewide usability.
Owner:XIAN YIPU COMM TECH

Chemical reactor temperature control method based on quantification single-parameter PID control

The invention relates to a chemical reactor temperature control method based on quantification single-parameter PID control, and the chemical reactor temperature control method is used for controlling the temperature of a chemical polymerization reactor. The control method includes the steps that a temperature signal of an object to be controlled is firstly collected, a model of the object to be controlled is identified according to the temperature signal, meanwhile, a single-parameter PID control module based on a system performance degree is built, a control output signal of the single-parameter PID control module is then obtained according to the model of the object to be controlled and the set system performance degree, and finally the temperature of the object to be controlled is controlled by the control output signal and is kept with a set range. In comparison with the prior art, only the parameter lambda needs to be adjusted so that the system performance can be achieved, operation is easy, moreover, the chemical reactor temperature control method has good robustness for the model to be identified, and the control effect on great delay, great inertia and other characteristics in the temperature control process is rapid and smooth.
Owner:SHANGHAI JIAO TONG UNIV

PID separated parameter setting method based on particle swarm algorithm

The invention discloses a PID separated parameter setting method based on a particle swarm algorithm, which comprises the following steps of: initializing and setting the number of particles, an inertial coefficient, an acceleration coefficient, the particle maximum iteration number, and an initial velocity of particle swarm, a space position component of each particle and a PID initial value corresponding to each particle; calculating an object function value corresponding to each particle; updating the position of an individual optimal particle, the position of a global optimal particle and the position component of each particle according to the object function value, and then updating the PID value corresponding to the iteration of each particle according to a PID mapping formula; repeating the iteration until the iteration ends; and outputting a global optimal PID parameter value and a corresponding PID value. According to the invention, a PID mapping algorithm is added to a conventional particle swarm optimization algorithm, and the particle space position component can be mapped to a three-dimensional PID parameter space. Thus the optimal particle position can be screened by using the algorithm, and the PID parameter setting efficiency is improved.
Owner:HUNAN UNIV OF SCI & TECH

PID control parameter setting method based on stability margin and dynamic response index

The invention relates to the field of PID control, in particular to a PID control parameter setting method based on stability margin and a dynamic response indexes. The PID control parameter setting method comprises the following steps of: calculating to obtain the stability margin of a closed loop control system; calculating to obtain PID control parameters according to the stability margin of the closed loop control system; performing closed-loop control system step response simulation according to the PID control parameters, and acquiring the dynamic response index through using a step response curve so as to indirectly associate the stability margin with the dynamic response index; and on the basis of an association mode of the stability margin and the dynamic response index, searchingthe stability margin to obtain an optimal solution of the optimization problem so as to set the PID control parameter. By using the PID control parameter setting method, the following effects can beachieved: the PID control parameters and the dynamic response performance indexes are associated, so that the user friendliness is improved; and the used gridding search optimization can directly givean optimal solution meeting the dynamic performance requirement of the user, so that the setting efficiency is improved, and repeated setting is avoided.
Owner:ZHEJIANG SUPCON TECH +1

Preparation method of polyurethane urea elastic fibers with high thermal setting efficiency

The invention relates to a preparation method of polyurethane urea elastic fibers with high thermal setting efficiency. The preparation method comprises the following steps: 1) mixing dihydric alcoholwith excessive diisocyanate to prepare a prepolymer, that is, primary polymerization; then dissolving the prepolymer in an organic solvent and subsequently adding a chain extender and a chain terminator into the organic solvent for secondary polymerization to obtain a secondary polymerization raw liquid; finally, adding an anti-ultraviolet agent, an antioxidant, a lubricant and a delustering agent into the secondary polymerization raw liquid to obtain a polyurethane urea raw liquid; 2) preparing a setting improving auxiliary agent solution; 3) adding the setting improving auxiliary agent solution into the polyurethane urea raw liquid to be mixed to obtain a polyurethane urea spinning solution, stirring and curing the solution for 20-40 hours, and carrying out dry-method spinning to prepare the polyurethane urea elastic fibers with high thermal setting efficiency. The polyurethane urea elastic fibers with high thermal setting efficiency have excellent thermal setting efficiency and good hand feeling, and a fabric prepared from the fibers is free of a crimping phenomenon.
Owner:ZHEJIANG HUAFENG SPANDEX

Phase failure protector phase failure threshold setting method and device, medium and computer equipment

The invention relates to a phase failure protector phase failure threshold setting method and device, a medium and computer equipment. The method comprises the steps that the voltage value outputted by the old probe in the phase failure test of an exciter is acquired so as to obtain each test voltage value; the voltage value of a new probe at each acquisition moment is acquired according to each test voltage value, the corresponding output voltage value of the old probe under multiple preset magnetic field intensity and the corresponding output voltage value of the new probe under multiple preset magnetic field intensity so as to obtain a simulation voltage value; the simulation voltage waveform is generated by using the simulation voltage value of the new probe at each acquisition moment; and the corresponding phase failure threshold of the phase failure protector equipped with the new probe is obtained according to the simulation voltage waveform. Therefore, the phase failure protector is equipped with the new probe and then the new phase failure threshold can be obtained without performing the phase failure test again so that tedious operation required for repeating the phase failure test can be omitted, the time duration for setting the phase failure threshold again can be greatly shortened and the setting efficiency is high.
Owner:CHINA GENERAL NUCLEAR POWER OPERATION +2

Parameter adjustment and display device for processing optical materials

InactiveCN102945006AImprove setting efficiencyEasy to debug and monitorProgramme controlComputer controlSystem structureDevice parameters
The invention discloses a parameter adjustment and display device for processing optical materials, which comprises a handheld manipulator and a communication option, wherein the communication option comprises a communication cable with an interface or a wireless communicator with the interface; and the handheld manipulator is in bidirectional communication with an upper computer. According to the invention, by using the handheld manipulator, an operator is capable of sending a processing parameter control request message to the upper computer to adjust processing parameters and receiving a processing parameter message from the upper computer to monitor a running state of a device. The parameter adjustment and display device provided by the invention is applicable to various optical material processing devices, capable of resolving structural incompatibility and large integration difficulty of new/old products between an optical parameter detecting subsystem and a master control system, greatly increasing the parameter setting efficiency of the device based on unchanging the overall structure of the device, making full use of the original optical parameter detecting device and not increasing high cost, and bringing convenience to engineering technicians for adjusting and monitoring the optical material processing device on site.
Owner:HUAZHONG UNIV OF SCI & TECH

Automatic tea shaping machine and shaping method thereof

The invention relates to an automatic tea shaping machine and a shaping method of the automatic tea shaping machine. The shaping machine comprises a main frame, a tea pressing mechanism and a wedge frame mechanism, wherein a shaping cabin is arranged on the main frame; the tea pressing mechanism comprises a main pressing plate, a first air cylinder/oil cylinder, a flexible shaping plate and a second air cylinder/oil cylinder; the wedge frame mechanism comprises a left wedge frame, a third air cylinder/oil cylinder, a right wedge frame and a fourth air cylinder/oil cylinder. The shaping machine is used in the shaping method for treating the tea sequentially through the steps of feeding, pre-pressing, shaping, loosing, shaping again and the like to obtain shaped tea. The automatic tea shaping machine disclosed by the invention can be used for simulating a conventional tea shaping technique quite well, the shaped tea is quite similar with the tea shaped by the conventional technique in shape and structure, small destructive effects are caused to the tea during a shaping process, the shaped tea particles are high in compactness, the brewed tea can not rapidly stretch, the color of the tea soup is similar with that of the tea soup of handmade tea, and the tea soup is not bitter either.
Owner:林清矫

A parameter tuning method based on particle swarm algorithm pid separation

The invention discloses a PID separated parameter setting method based on a particle swarm algorithm, which comprises the following steps of: initializing and setting the number of particles, an inertial coefficient, an acceleration coefficient, the particle maximum iteration number, and an initial velocity of particle swarm, a space position component of each particle and a PID initial value corresponding to each particle; calculating an object function value corresponding to each particle; updating the position of an individual optimal particle, the position of a global optimal particle and the position component of each particle according to the object function value, and then updating the PID value corresponding to the iteration of each particle according to a PID mapping formula; repeating the iteration until the iteration ends; and outputting a global optimal PID parameter value and a corresponding PID value. According to the invention, a PID mapping algorithm is added to a conventional particle swarm optimization algorithm, and the particle space position component can be mapped to a three-dimensional PID parameter space. Thus the optimal particle position can be screened by using the algorithm, and the PID parameter setting efficiency is improved.
Owner:HUNAN UNIV OF SCI & TECH

Method for detecting initial position of rotor of permanent magnet motor

The invention discloses a method for detecting the initial position of a permanent magnet motor rotor, which belongs to the technical field of permanent magnet motor control and consists of three parts, namely initial estimation of the rotor position, discrimination of the magnetic pole direction of the rotor and compensation of the initial estimation of the rotor position. Firstly, high-frequency carrier voltage is injected into an estimated d axis, and initial estimation of the rotor position is achieved by collecting estimated q-axis carrier current and conducting closed-loop control. After initial estimation of the rotor position is completed, discrete Fourier transform is used to detect the amplitude of the carrier current so as to discriminate the magnetic pole direction of the rotor. And finally, the initial estimation value of the rotor position is compensated according to the discrimination result of the rotor magnetic pole direction to realize the detection of the initial position of the rotor. According to the invention, integration of initial estimation of the rotor position and a rotor magnetic pole direction discrimination algorithm is realized, the detection algorithm is simple, and the method has the advantages of fast detection speed and high reliability.
Owner:BEIHANG UNIV

Rapid tuning method for unmanned underwater vehicle course control parameters

PendingCN109814375AAvoid repeated modification of control software and repeated test preparationImprove efficiencyControllers with particular characteristicsPosition/course control in three dimensionsData transmissionControl parameters
The invention provides a rapid tuning method for unmanned underwater vehicle course control parameters. The method specifically comprises the following steps that a rapid tuning system for unmanned underwater vehicle course control parameters is constructed, wherein the system comprises an unmanned underwater vehicle, a ground station, a ground data transmission radio and a remote controller; theground station sends measuring control data to the unmanned underwater vehicle through the ground data transmission radio; remote control data is sent to the unmanned underwater vehicle through the remote controller; the unmanned underwater vehicle is controlled by the measuring control data and the remote control data to sail in water, and remote sensing data is fed back to the ground station; the ground station utilizes the tuning principle according to the remote sensing data for optimizing and tuning control parameters. According to the rapid tuning method for the unmanned underwater vehicle course control parameters, the method performs high integration on the parameter tuning and control system, parameter tuning and instruction data transceiving are performed through the wireless radio, sailing speed control is performed through remote control, repeated control software modification and repeated experiment preparation are avoided, and the parameter tuning efficiency is remarkablyimproved.
Owner:NO 719 RES INST CHINA SHIPBUILDING IND

A Drill Needle Jacking Device with Automatic Positioning Function

The invention discloses a drill pin sleeve-feeding device with an automatic positioning function. The drill pin sleeve-feeding device comprises a drill pin assembly, a main body, a vibration disk mechanism, a pin-feeding plate assembly, a sleeve-feeding device assembly, a pin-discharging plate, a pushing plate, a recycling box and a pin-discharging track. The drill pin assembly comprises a drill pin and a positioning sleeve. The pin-feeding plate assembly is used for automatic aligning, arranging and placing of the positioning sleeve and the drill pin assembly to be subjected to sleeve feeding again. The sleeve-feeding device assembly is used for replacing and positioning the positioning sleeve of the drill pin assembly. The pin-discharging plate is used for conveying the positioned drill pin assembly subjected to sleeve feeding again to the front end of the pin-discharging plate. The pushing plate is located at the front end of the pin-discharging plate and used for pushing the drill pin assembly conveyed to the front end of the pin-discharging plate to the right side. The recycling box is located at the lower end of the pin-discharging plate and used for recycling the replaced positioning sleeve. The pin-discharging track is located at the front end of the pin-discharging plate and the upper end of the pushing plate. According to the drill pin sleeve-feeding device with the automatic positioning function, the sleeve-feeding efficiency is improved, and the stability and the consistency of the sleeve-feeding position of the drill pin are improved.
Owner:SUZHOU DONGHENG NC ELECTRONICS CO LTD
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