47 results about "Optimal tuning" patented technology

A tunable matching circuit is adjusted primarily based on transmitter oriented metrics and is then applied to attain a desired tuning for transmitter and receiver operation. In a TDM system, this is accomplished by identifying an optimal tuning for the transmitter and then applying an empirically derived adjustment to the tuning circuit in receiver mode. In an FDM system, this is accomplished by identifying a target operation that is a compromise between transmitter performance and receiver performance, and then adjusting the tuning circuit as a function of transmitter metrics and the current tuning values to achieve the desired compromised performance.

The present invention demonstrates that continuous hemodynamic monitoring can be used to identify the optimal AV-delay in a pacemaker-treated patient with end stage heart failure. The AV-delay determines the timing of late diastolic filling in relation to the onset of ventricular contraction and the duration of diastolic filling. An optimal tuning of the AV-delay improves left ventricular filling pressures in patients with a DDD-programmed pacemaker and is particularly important in the presence of a compromised left ventricular function. It has been discovered that using the lowest ePAD pressure, an indirect parameter of the left ventricular end-diastolic pressure, as an indicator for the optimal AV interval. Importantly, measurements of the ePAD revealed the same optimal AV-delay as echocardiographic assessment of left ventricular diastolic filling by standard echocardiographic methods. Importantly, the HR determined as optimal during the acute hemodynamic test did not turn out to be optimal during daily living activities.

A method for determining the measure of control provided to a process by a control system. The determines process model parameters for a simple and complex model of the process and uses those parameters along with the value of the process variable and the final control element position to predict the off control data. The method also uses the process model parameters to determine the optimal tuning and then forecasts the optimal process performance from the predicted off control data and the determined optimal tuning.

The invention discloses a damping device for a beam-array-shaped periodical piezoelectric composite structure. According to the structure of the damping device, multiple layers of piezoelectric beam arrays and multiple layers of metal beam arrays are alternately stacked; the adjacent layers are fixedly connected through insulating plates; and all piezoelectric beams are connected with shunt circuits to form loops, wherein each shunt circuit is formed in a manner that an inductor and a resistor are connected in series. The invention further provides a damping optimizing method based on the above device, the resistance value is gradually increased from zero, and meanwhile the inductance value is determined according to circuit parallel resonance conditions. The attenuation effect of vibration is gradually enhanced along with increasing of the resistance, the frequency response curve of the damping device is overall lowered along with increasing of the resistance, and parameters of the shunt circuits become the optimal tuning parameters till the frequency response curve peak of the damping device becomes the minimum. By means of the device and the method, an isolation effect is achieved on excitation in the horizontal direction/perpendicular direction due to frequency forbidden band characteristics, low-frequency excitation in the transverse x3- direction can be adjusted in real time through the shunt circuits, and therefore the vibration inhibiting function is achieved.

The invention discloses a device and method for controlling the temperature inside an automobile. The device comprises an automobile air conditioner, an engine ECU, a central processing unit, a storage unit, a wireless communication module, a first temperature sensor arranged outside the automobile and a second temperature sensor arranged inside the automobile, wherein the central processing unit is electrically connected with the storage unit, the wireless communication module, the first temperature sensor, the second temperature sensor, the automobile air conditioner and the engine ECU. By means of the device and method for controlling the temperature inside the automobile, the temperature outside the automobile, the temperature inside the automobile, the target temperature which is set by a user and needs to be reached inside the automobile, and the time when the user enters the automobile can be analyzed, and the optimal tuning-on time of the automobile air conditioner can be determined, so that the temperature inside the automobile just reaches the target temperature when the user enters the automobile, and fuel oil is saved.

A method for improved tuning of servo motors used to drive guillotine cutters on a high speed inserter machine. The tuning coefficient is continuously varied during the blade's cutting cycle. In a first step of the tuning process, a plurality of discrete positions in the blade cycle are selected for analysis of the optimal tuning coefficients. For these discrete positions, tuning coefficients are determined. After the tuning coefficients have been determined for the discrete locations in the blade cycle, the coefficients for the remainder of the blade cycle are determined through interpolation. In a preferred embodiment, linear interpolation is used. A digital filter then applies the measured and interpolated coefficients to the amplifier that controls the motor. In the preferred embodiment, the step of selecting the discrete positions includes selecting 90 degrees, 180 degrees, 270 degrees, and 360 degrees in a guillotine blade cycle. These four positions roughly correspond to peaks and valleys in the coefficients needed to work with the varying torques that are required over the blade cycle. By testing for the proper coefficients at those four discrete quadrant positions, the appropriate bases for linear interpolation are achieved.

The invention provides application of an automatic switching mode of a frequency converter of a power station. When power-frequency-to-variable-frequency switching of an induced draft fan is carried out during normal running of a unit, in order to be capable of meeting the running characteristics of the unit early, an inlet baffle of the induced draft fan can be manually adjusted by an operator, the furnace pressure is maintained stable, then power-frequency-to-variable-frequency switching of the induced draft fan is carried out, and then the baffle is manually adjusted by the operator to be at the preset opening degree after power-frequency-to-variable-frequency switching is successful. When variable-frequency-to-power-frequency switching of the induced draft fan is carried out, as the inlet baffle of the induced draft fan is basically located at the full-open position, an opening degree curve, corresponding to loads, of the opening degree of the inlet baffle of the induced draft fan needs to be increased to obtain the optimal adjustment mode, and after experiments, it is determined that the inlet baffle of the induced draft fan is limited to be at the opening degree of 60%.

The invention provides a method for automatically realizing the tuning of an electronic tuning radio, which relates to the field of a broadcast technology and a computer software application technology. The method for automatically realizing the tuning of the electronic tuning radio mainly utilizes an established test module to carry out automatic test, interpolation operation and fine tuning on an ANT_vtune ATBACK list and an AMP_vtune ATBACK list, so that an antenna tuning loop calibrates r frequency points on some wave band L point by point, obtains accurate Vtune value, and stores the accurate Vtune value into the ANT_vtune ATBACK list, and a high-frequency amplifying tuning loop also calibrates the r frequency points on some wave band L point by point and adjusts the AMP_vtune ATBACKlist in time. The optimal resonance capacitance values of all the frequency points of the radio can be automatically calculated by assessing noise level, so that the optimal tuning of all the frequency points can rapidly and accurately be realized. The invention solves the problem that the optimal tuning can not be carried out on all the frequency points one by one during the production of the electronic tuning radio, overcomes the disadvantages of the long time period and the cumbersome process of manually tuning a sample machine one by one, and reduces the production complexity.

The invention proposes a method for designing a single-tuning LC filter by using a fractional-order model of a capacitor and an inductor, belonging to the field of design of a passive filter. Accordingly to the method, firstly, the fractional-order model of the capacitor and the inductor is analyzed, and a fractional-order impedance mode of the capacitor and the inductor is proposed; secondly, the impedance frequency characteristics of a circuit under different fractional orders are analyzed according to an impedance mode of a series circuit; and finally, a capacitance value, an inductance value and a resistance value in the single-tuning LC filter are analyzed by taking minimum capacitance installation capacity and optimal tuning acutance Q value of the circuit as targets, and the obtained admittance track of the single-turning LC filter is more abundant and is not only a semi circle under an integer order condition, and the impedance frequency characteristic of the designed LC filter is more accurate compared with the condition of integer order. With the addition of the fractional order, the design of the filter is more flexible, and moreover, the method has guidance significance for that more fractional-order devices are widely used for filter design.

The invention discloses a PID parameter switching method and device for a water turbine set speed regulator. The PID parameter switching method comprises the following steps that the optimal-tuning ofPID parameters of all the water turbine set speed regulators are conducted by adopting a preset PID parameter setting algorithm, and a first PID parameter and a second PID parameter are obtained; thewater turbine set speed regulators are grouped according to the active power amplitude corresponding to the occurrence of oscillation of the water turbine set speed regulators, and a PID parameter operation mode of each set of water turbine set speed regulators is determined; a PID parameter fuzzy switching model of the water turbine set speed regulators is correspondingly constructed according to the PID parameter operation mode of each water turbine set speed regulator; real-time frequency deviation values obtained in real time are input into the PID parameter fuzzy switching models, and the PID parameter operation modes of the water turbine set speed regulators are switched according to the output results of the PID parameter fuzzy switching models, so that the water turbine set speedregulators can simultaneously consider the one-time frequency modulation performance and the damping level, and then ultralow-frequency oscillation of a power plant side inhibition system can be realized.

The invention discloses a fuzzy adaptive sliding mode control method and system based on differential evolution algorithm optimization. The method comprises the steps of firstly, building a permanentmagnet synchronous motor sliding mode speed controller model, and deriving a speed control law; calculating speed deviation and a sliding mode surface; digitally representing a fuzzy rule; fuzzing thesliding mode surface and the derivative thereof as input; looking up an initial fuzzy rule table; performing defuzzification on the to-be-optimized parameters to serve as output; and finally, calculating the output of the controller, carrying out optimization selection on the fuzzy rule by using a differential evolution algorithm until the optimal index is converged to the minimum value, and selecting an optimal fuzzy rule table. According to the invention, the fuzzy rule in the fuzzy sliding mode controller is optimized by using the differential evolution algorithm, optimal adjustment of gain parameters in the exponential reaching law in the sliding mode algorithm is automatically achieved, the permanent magnet synchronous motor sliding mode controller which is rapid in response, small in overshoot and good in robustness is designed, and the requirements of the field with high performance requirements for a permanent magnet synchronous motor speed regulation system are met.

The invention discloses a loading control method for a dynamic offset directional rotary steering drilling tool test bed. The method comprises the following steps: respectively establishing transfer functions of a hydraulic cylinder, a magnetic powder brake and a proportional overflow valve of an analog loading device according to mathematical models thereof; calculating the relation between inputand output by using a fuzzy self-adaptive PID controller through a fuzzy reasoning method, and carrying out the optimal adjustment of PID parameters; then, applying a Simulink module in Matlab software to compare the simulation result of the designed control method with the simulation result of a conventional PID control method; results show that the fuzzy adaptive PID control method has faster response time and better anti-interference capability; research results show that the control method is feasible for an analog loading system of the dynamic offset directional rotary steering drillingtool test bed, the response speed of the system is increased, and the stability of the system is better.

Determining a shaft balance adjustment includes measuring an initial vibration of the shaft, determining if the initial vibration is greater than a predetermined value, and, if the initial vibration is greater than the predetermined value, determining an adjustment by choosing a best adjustment for each possible location for adjustments. Choosing the best adjustment may include choosing an adjustment that causes a lower amount of vibration than adjustments not chosen. Measuring an initial vibration may include using an accelerometer. Measuring an initial vibration may include using conditioning electronics in connection with the accelerometer. The predetermined value may be 0.01 ips.

The disclosure provides a trimming method, a trimming circuitry, and a trimming system for an IC with memory usage reduction. The method is applicable to a system including a tester, a characteristic adjustable circuit, and a trimming circuitry having a characteristic outputting circuit, a data memory, and a trim memory. The method includes the following steps. Under each condition, output signals respectively corresponding to trim settings are received from the characteristic adjustable circuit by the characteristic outputting circuit to obtain output values of the condition, a statistical parameter associated with the output values of the condition is calculated by the tester. The statistical parameter of at least one of the conditions is written into the data memory by the tester. An optimal trim setting of the characteristic adjustable circuit is determined according to the statistical parameters under all the conditions and written into the trim memory by the tester.

The invention discloses a hyper-parameter adjustment and optimization method and device and a storage medium, and the method comprises the steps: carrying out the adjustment and optimization of a hyper-parameter adjustment and optimization strategy when the current available calculation resource is obtained because the corresponding relation between the resource quantity of the calculation resource and the hyper-parameter adjustment and optimization strategy is stored in advance; selecting the hyper-parameter tuning strategy corresponding to the currently available computing resources according to the corresponding relationship, and then turning the hyper-parameter according to the hyper-parameter tuning strategy. By applying the technical scheme, different hyper-parameter tuning strategies are selected according to available computing resources in a specific scene, the existing computing resources can be utilized to the maximum extent, the optimal tuning effect is achieved, and the requirement of training precision is met as far as possible.