256 results about "Analog control" patented technology

The invention relates to the technical field of battery testing, in particular to an automatic BMS function testing system and method. The method comprises the following steps: acquiring BMS working parameters; performing short-circuit working condition configuration processing according to the BMS working parameters to generate short-circuit working condition configuration data; performing short-circuit signal simulation based on the short-circuit working condition configuration data to generate short-circuit simulation control signal time sequence data; based on the short-circuit analog control signal time sequence data, a battery pack current short-circuit driving test is carried out through a BMS monitoring system, and BMS monitoring response data is generated; and performing short-circuit current monitoring protection evaluation according to the BMS monitoring response data, and generating BMS function test level data. According to the invention, the automatic test of the BMS short-circuit protection function is realized by intelligently configuring the short-circuit working condition, and the efficiency, accuracy and repeatability of the test are remarkably improved.

The invention relates to the technical field of power supply equipment power control. The load power track simulation control method comprises the steps of obtaining voltage information and current information of target power supply equipment, determining power deviation information and a dynamic target voltage range generated on the basis of a preset load behavior prediction model, constructing a combined regulation and control weight vector on the basis of the power deviation information, and obtaining a load power track simulation control result. According to the combined regulation and control weight vector and the dynamic target voltage range, constructing a target power evolution trajectory curve by using a physical response inversion mechanism, executing time discretization processing on the target regulation and control trajectory curve, extracting voltage change values and current change values corresponding to each time step, and calculating the target power evolution trajectory curve; and combining the voltage change value and the current change value according to a time sequence to form a control parameter sequence, and generating an analog control instruction matched with the target power evolution trajectory curve according to the control parameter sequence. The method has the effect of improving the real-time response capability of the power supply equipment under complex working conditions.

The invention discloses a pulsed neutron generator control system based on LabVIEW, and the system comprises a neutron generator industrial personal computer which operates a virtual human-computer interaction interface developed based on LabVIEW; the console core board carries a DSP main control chip and is embedded into a real-time operating system; the driving sampling board is connected with the console core board and is integrated with a signal conditioning circuit; the neutron generator industrial personal computer communicates with the console core board through a Modbus protocol, and controls and drives the sampling board to output control signals of the three independent power supply ion sources, the storage and the acceleration pole to the neutron tube; wherein the console core board generates three paths of PWM signals with the PWM frequency of 2.5 kHz and the step length of 8191, and the three paths of PWM signals are converted into analog control signals through the driving sampling board. According to the control system, the PWM control precision is greatly improved, the voltage control precision is improved to 0.012% (100% higher than that of a conventional scheme) through the combination of the 8191 step length (13-bit resolution) and the 2.5 kHz frequency, and the neutron yield fluctuation is controlled within + / -1.5%.

Coherent wavelength division multiplexing is provided using frequency comb sources for both the transmitter and the local oscillator (LO) in the receiver. The local oscillator is made phase coherent with the received multifrequency optical signal using two analog control loops. One of the control loops locks an optical frequency of the local oscillator to an optical frequency of the received frequency comb. The other control loop locks a microwave frequency of the local oscillator (i. e. LO the comb spacing) to the comb spacing of the received frequency comb. As a result, coherent detection is enabled in all channels with just two analog control loops. Control signals for the two loops can be derived from two of the received channels individually (asymmetric carrier recovery), or they can be derived from sum and difference signals from two of the received channels (symmetric carrier recovery).

The invention provides a delay compensation control method for a double-vibrator wave energy conversion device, which comprises the following steps of: performing numerical modeling and hydrodynamic analysis on the double-vibrator wave energy conversion device, establishing a time domain motion equation of the double-vibrator wave energy conversion device, and introducing a time delay function into the time domain motion equation to simulate control signal transmission delay; simulating the execution delay of the brake by using a partial differential equation; establishing a state-space equation of the device, replacing a convolution term of the time-domain motion equation with the state-space equation, and calculating to obtain a motion state of the device; a Hamiltonian function is defined to convert a constrained optimization problem into an unconstrained optimization problem, and the Hamiltonian function is solved to obtain an optimal control criterion considering control delay so as to realize maximization of energy capture under the optimal control criterion. According to the method, the operation characteristics of a physical system are truly reflected by introducing control delay, so that the locking control method is effectively implemented in an actual physical device, and the energy capture efficiency of a wave energy conversion device and the reliability of system operation are effectively improved.

The invention relates to the technical field of high-voltage VI modules, and particularly discloses a high-voltage VI source module for SOC testing, which comprises an output stage module, a sampling module and a control and conversion module, the output stage module is constructed by adopting discrete high-voltage power devices, supports four-quadrant operation, and can realize flexible output and absorption of voltage and current; the sampling module is composed of a voltage sampling unit and a current sampling unit which respectively monitor voltage and current signals of the output stage in real time. The control and conversion module comprises a control unit and a digital-to-analog conversion unit; the digital-to-analog conversion unit is responsible for converting a digital control signal into an analog control signal to drive the output stage and converting analog voltage and current signals collected by the sampling module into digital feedback signals; and the control unit receives the digital feedback signals and adjusts the output of the digital-to-analog conversion unit in real time through a closed-loop control algorithm, so that high-precision and high-stability control on the output-stage voltage or current is realized.

According to an embodiment, a phased-locked loop (PLL) circuit, within a gyroscope system, generates demodulation signals. It includes a phase frequency detector receiving gyroscope output, which compares a reference signal with a feedback signal to produce an error signal. A charge pump then converts this error into a first analog control signal. A programmable clamp circuit refines this into a second analog control signal. A voltage-controlled oscillator uses the second signal to produce an output signal at a controlled frequency determined by the clamp circuit. A frequency divider sends a comparison frequency signal back to the detector, completing the loop.

The invention discloses a semiconductor laser double-layer temperature control system, which is characterized in that firstly, digital PID temperature control is carried out on an external heat sink of a laser, the set voltage of an outer thermistor and an outer slide rheostat is converted by an ADC conversion circuit and then is sent to an STM32, and control information is sent to a DAC conversion circuit after digital PID operation; and the DAC conversion circuit outputs a control signal to a CTLI pin of the MAX1978 after analog-to-digital conversion, and generates a driving current to control an outer TEC, thereby realizing coarse stabilization of the external temperature of the laser. The inner layer adopts a simulation PID control mode, an inner layer MAX1978 chip reads voltage values of a thermistor and a slide rheostat in the laser and then carries out simulation PID network operation, current is output to drive a TEC in the laser, and therefore high-stability temperature control of the laser is achieved.

An analog electronic component for control of an aerosol delivery device is provided. The aerosol delivery device includes a heating element, a reservoir that retains aerosol precursor composition, and an analog electronic component that in response to user input, and independent of a digital processor, is configured to direct a constant current to the heating element and thereby cause the heating element to activate and vaporize components of the aerosol precursor composition in response to user input, and a user input interface through which the user input is receivable.

The invention relates to the technical field of switching power supply analog control, in particular to a control method and system for a small-duty-ratio BOOST module based on digital control, and the method comprises the following steps: S1, carrying out the sampling of the equal-proportion reduced output voltage of an operational amplifier through an ADC analog-to-digital converter, processing the sampled voltage value through a filtering algorithm to obtain an output voltage VO; and S2, carrying out calculation processing on the output voltage VO through a PID control algorithm, and obtaining an expected output voltage through a fixed-frequency adjustment duty ratio PWM and a fixed-duty ratio frequency modulation PFM. Efficient and stable voltage boosting is achieved through double-closed-loop digital control, dynamic response and anti-interference capacity are achieved, the core lies in collaborative design of power conversion and a control strategy, input direct-current voltage is boosted to higher stable output voltage, a double-closed-loop (voltage loop + current loop) control strategy is adopted, and the voltage boosting effect is achieved. And closed-loop adjustment is realized by combining PWM driving and ADC sampling.

According to an embodiment, a phased-locked loop (PLL) circuit, within a gyroscope system, generates demodulation signals. It includes a phase frequency detector receiving gyroscope output, which compares a reference signal with a feedback signal to produce an error signal. A charge pump then converts this error into a first analog control signal. A programmable clamp circuit refines this into a second analog control signal. A voltage-controlled oscillator uses the second signal to produce an output signal at a controlled frequency determined by the clamp circuit. A frequency divider sends a comparison frequency signal back to the detector, completing the loop.

The embodiment of the invention provides a converter mode switching control circuit and method, and the circuit comprises a voltage regulation unit circuit, a Buck bridge arm unit control circuit, a Boost bridge arm unit control circuit, and a mode selection circuit. The voltage regulation unit circuit is used for converting an output voltage Vo into an error signal Verror and sending the error signal Verror to the Buck bridge arm unit control circuit and the Boost bridge arm unit control circuit respectively; the sawtooth wave generator outputs a signal vsaw, sends the signal vsaw to the Buck bridge arm unit control circuit, and outputs a Buck bridge arm duty ratio Dy1; the sawtooth wave generator outputs a signal vsaw, sends the signal vsaw to the Boost bridge arm unit control circuit, and outputs a Boost bridge arm duty ratio Dy2; and the mode selection circuit is used for indicating a Boost mode, a Buck mode and a Buck-Boost mode. The invention provides digital and analog control of converter three-mode smooth switching.

The invention discloses detection equipment suitable for high and low penetration performance and a control method, and belongs to the technical field of power grid fault detection, the detection equipment comprises a converter, an IO board, high penetration generation equipment, low penetration generation equipment, a CAN communication module, an upper computer, a branch parallel contactor switch for connecting a power grid with the converter, the high penetration generation equipment and the low penetration generation equipment are connected with a branch, and the branch parallel contactor switch is connected with the CAN communication module. The IO board is connected with the contactor switch, the high-pass generation device and the low-pass generation device, and the converter is connected with the upper computer through the CAN communication module. Through operation steps of contactor control and the like, three ride-through conditions of high voltage ride-through, low voltage ride-through and high and low voltage chain ride-through are simulated and controlled, and the high and low voltage ride-through performance of a unit is detected according to waveform change of sampling parameters before and after high and low voltage ride-through of a model. The high-low penetration capability of the unit is tested through the detection equipment, so that the influence of such faults on power generation is reduced, the safety of workers is maintained, and the power generation capability of the fan is improved.

The embodiment of the invention provides a low-noise hundred-ampere-level current source which can be applied to the technical field of current sources. The current source comprises a loop compensation module, a voltage driving circuit and a current detection feedback module which are sequentially connected in series, the current source further comprises an energy storage module which is connected with the voltage driving circuit and the current detection feedback module in parallel, and the energy storage module is used for providing electric energy for a load coil; the loop compensation module is used for performing compensation operation on the accessed analog control signal and the voltage feedback signal and outputting a compensation signal; the voltage driving circuit is used for obtaining electric energy from the energy storage module through the load coil based on the compensation signal output by the loop compensation module so as to provide output current for the current detection feedback module; and the current detection feedback module is used for sampling the output current, converting the output current into a voltage feedback signal and outputting the voltage feedback signal to the loop compensation module to form a feedback loop so as to adjust the output current.

The invention discloses a laser main control board performance test system and a test tool, and relates to the technical field of laser testing, and the system comprises a power supply simulation input circuit, an upper computer simulation control circuit, a light emitting simulation feedback circuit, a light emitting detection circuit and a signal processing circuit. The power supply simulation input circuit simulates the power supply input of a real laser, the upper computer simulation control circuit simulates and controls the upper computer of the real laser, and the light output simulation feedback circuit simulates the light output and feedback of the real laser, so that the to-be-tested main control board works. A light-emitting control signal is generated and post-processing is carried out based on a light-emitting feedback signal, then light-emitting power and an output power feedback signal of the simulation laser are collected through a light-emitting detection circuit, signal processing is carried out through a signal processing circuit, and a test result is obtained and displayed. According to the invention, the simulation laser is constructed based on the to-be-tested main control board and a simple circuit structure, so that the rapid performance of the main control board can be tested.

The invention belongs to the technical field of photoelectric fusion integrated circuits, and particularly discloses a parallel PWM expansion high-precision programmable DAC structure. The adjusting module is used for adjusting the thermo-optical phase shifter according to the received digital control signal; the DAC structure specifically comprises a pulse width modulation signal generator and a current source array, wherein the pulse width modulation signal generator is used for acquiring a low-order code element from the digital control signal to generate a pulse width modulation signal, and sending the pulse width modulation signal to the current source array; wherein the current source array is used for acquiring a high-order code element from the digital control signal to generate a high-order analog signal; a low-order analog signal is generated based on the pulse width modulation signal; and the processor is also used for weighting and accumulating the low-order analog signal and the high-order analog signal to obtain an analog control signal and outputting the analog control signal. The DAC structure is high in precision and simple in structure.

The present invention relates to the field of intelligent regulation technology, and particularly to a constant temperature intelligent valve control system and its control method. The method includes the following steps: receiving the DDC analog control signal in real time through the constant temperature intelligent valve and performing vibration-free judgment in the standby mode and valve adjustment control analysis to generate a valve position opening adjustment control mode and a valve flow adjustment control mode; monitoring the supply and return water temperatures of the constant temperature intelligent valve in real time and calculating the valve temperature difference to obtain the measured temperature difference of the intelligent valve; performing valve adjustment control logic response analysis on the constant temperature intelligent valve to generate a basic regulation mode and a constant regulation mode of the intelligent valve; obtaining the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve and performing basic regulation processing and constant regulation processing on the constant temperature intelligent valve to execute the corresponding intelligent valve regulation control work. The present invention can automatically adjust the control mode according to actual needs, and has high adaptability, accuracy and energy saving performance.

The invention relates to a level control system and method for radio frequency signal output power, belongs to the technical field of signal processing, and solves the problem that an existing power compensation algorithm is complex and unstable. In the system, a radio frequency amplifier is used for performing power amplification on a radio frequency signal input according to set power; the electric control attenuator is used for adjusting the power of the input radio frequency signal according to the control voltage output by the feedback circuit; the directional coupler is used for outputting a radio frequency signal after power regulation through the straight-through port, and inputting the radio frequency signal to the first microwave detector to obtain output power; coupling the radio frequency signal after power regulation to a feedback circuit through a coupling port; a digital PID control module in the feedback circuit is used for acquiring an analog control voltage according to a radio frequency signal, and a feed-forward control module is used for acquiring a feed-forward control voltage according to power pre-amplitude-stabilizing data corresponding to set power; and the analog control voltage and the feed-forward control voltage are added to obtain a control voltage output by the feedback circuit. And the output power can be quickly and stably adjusted.

The invention discloses a portable electric energy metering analysis simulation device. The device comprises a simulation control unit, a three-phase simulation power supply generation unit, a display screen and a plurality of output wiring terminals. The simulation control unit is used for obtaining fault simulation information, determining display parameters and voltage parameters and current parameters corresponding to each output wiring terminal based on the fault simulation information, and sending the voltage parameters and the current parameters corresponding to each output wiring terminal to the three-phase simulation power supply generation unit. The display screen is controlled to display the display parameters; the three-phase simulation power supply generation unit is used for outputting metering voltage and metering current to each output wiring terminal based on the voltage parameter and the current parameter corresponding to each output wiring terminal, and the metering voltage and the metering current output to the output wiring terminal are respectively the same as the voltage parameter and the current parameter corresponding to the output wiring terminal. According to the scheme, the fault simulation efficiency of the electric energy metering device such as the electric energy meter can be improved.

The invention relates to a radio frequency power supply and a test analysis method thereof. The radio frequency power supply comprises a main controller; the slave controller adjusts and controls the output of the radio frequency power supply according to an instruction of the master controller or a preset algorithm so as to realize the logic function of the radio frequency power supply through programming; the DDS source generates a signal source with a specific waveform and frequency; the ADC detection module collects an analog signal of the radio frequency power supply and converts the analog signal into a digital signal; the DAC attenuation module converts the digital control signal into an analog control signal so as to adjust an output signal of the radio frequency power supply, and the DAC attenuation module adopts a low-speed operational amplifier so as to enable second power values obtained by checking a power correspondence table by the DDS source to be in one-to-one correspondence with the first power values by increasing response time; the PA power amplification module amplifies an output signal of the radio frequency power supply so as to meet the power requirement of a load; coupling / VI sensor signal transmission and coupling; and monitoring voltage and current values in the power supply system in real time.

Disclosed in the present invention are an overvoltage protection method for a radio frequency front-end module, and an electronic device. The overvoltage protection method comprises the following steps: measuring a power supply voltage in real time; determining whether the power supply voltage reaches a first voltage threshold value; starting to count a first time; determining whether the first time reaches a first time threshold value; a radio frequency front-end module entering an overvoltage protection mode; an analog control circuit reducing the gain of a power amplifier or turning off the power amplifier; determining whether the power supply voltage reaches a fifth voltage threshold value; starting to count a second time; determining whether the second time reaches a second time threshold value; the radio frequency front-end module exiting the overvoltage protection mode; and the analog control circuit enabling the power amplifier to restore low-gain operation or restore normal operation. The use of the present invention implements the effective protection for radio frequency front-end modules.

The utility model provides a radio frequency power amplifier and a radio frequency chip. The radio frequency power amplifier comprises an amplifier, a first adjustable attenuation circuit, a second adjustable attenuation circuit and a first capacitor. Compared with the prior art, the first adjustable attenuation circuit and the second adjustable attenuation circuit are additionally arranged at the input end of the amplifier, input attenuation protection is achieved by adopting a simple circuit structure, the number of used devices is small, and the chip area cost can be effectively saved. Meanwhile, the input attenuation amount of the first adjustable attenuation circuit and the second adjustable attenuation circuit can be flexibly adjusted through a digital control bit and an analog control voltage, and free adjustment of different attenuation amounts at different temperatures is achieved; meanwhile, the input end of the amplifier is simple in structure, complex feedback loop control is avoided, the response speed is higher, and deterioration of the radio frequency performance of an amplifier channel is smaller.

The invention discloses an analog control method and system based on super capacitor energy storage inertia support. The method comprises the following steps: simulating a selected new energy energy storage micro-grid topology; constructing a virtual synchronous machine according to the synchronous machine rotor motion equation and the super capacitor power dynamic equation; designing a corresponding inertia-damping-reactance control loop according to the virtual synchronous machine, and configuring the super capacitor under a preset condition based on the simulated inertia parameter, the frequency change range and the voltage change range determined from the control loop; the configured super capacitor is used as an energy storage support, and inertia characteristics, damping characteristics and reactance characteristics of the virtual synchronous machine are simulated according to an inertia-damping-reactance control loop; obtaining a target power reference value of the super capacitor in response to the inertia characteristic, the damping characteristic and the reactance characteristic; performing analog control on the output power of the super capacitor according to the target power reference value; the characteristics of the synchronous machine can be simulated through reasonable configuration, and the power grid stability is comprehensively improved.

The invention discloses an accelerator pedal and gear combined control device and a test method, which are mainly characterized in that a single chip microcomputer communicated with an upper computer is utilized, and two paths of voltage signals are set and are used for being connected with an accelerator pedal opening signal wire harness of a real vehicle to simulate double paths of voltage for controlling the opening of the pedal; and two CAN channels are configured, one CAN channel is connected with a real vehicle gear signal wire harness to control the real vehicle to shift gears, and the other CAN channel is communicated with a real vehicle CAN network to collect real vehicle feedback information so as to verify test control. Specifically, gear and accelerator pedal control instructions are input and sent during testing, CAN signals fed back by a tested real vehicle are collected for each control instruction, whether execution of the control instructions is abnormal or not is judged based on the feedback signals, and the control instructions, execution conditions of the control instructions and corresponding timestamps of the control instructions are recorded in the testing process. Control linkage of the gear and the opening degree of the accelerator pedal is achieved in an efficient and low-cost mode, the control verification function is provided, and the vehicle type application range is wider.

The invention discloses a hybrid control variable gain amplifier without a decoder and a circuit of the hybrid control variable gain amplifier. The hybrid control variable gain amplifier comprises an OPA amplifier and two CMOS arrays connected with the OPA amplifier through a switch C1 and a switch C2. The hybrid control variable gain amplifier is switched from an analog control mode to a digital control mode by closing the switches C1 and C2. According to the circuit of the hybrid control variable gain amplifier without the decoder, circuits of two groups of CMOS arrays are respectively connected with a circuit of an OPA amplifier through a switch C1 and a switch C2; a circuit of the CMOS array is formed by connecting circuits of n + 1 gain blocks in parallel. A decoding module is not needed, delay can be effectively reduced in application needing extremely high-speed response, and compared with a traditional hybrid control variable gain amplifier, the hybrid control variable gain amplifier has the advantages of being relatively simple in structure, low in complexity, higher in analog control flexibility and wide in application.

A power supply circuit generates from the input voltage of a primary circuit system the output voltage of a secondary circuit system by driving a switching output stage. The power supply circuit includes: a pulse feedback signal generation circuit that generates a pulse feedback signal corresponding to the output voltage; an analog control signal generation circuit that generates an analog control signal corresponding to the pulse feedback signal; and a switching driving control circuit that drives the switching output stage according to the result of comparison of the analog control signal with a slope signal. The analog control signal generation circuit raises the maximum value (an internal supply voltage) of the analog control signal with a predetermined gradient during the start-up or renewed start-up of the output voltage.

Circuits are disclosed for controlling voltage regulators. In general, one aspect disclosed features an electric circuit comprising: a digital ramp generator configured to generate a digital voltage ramp; a digital low-pass filter having an input electrically coupled to an output of the digital ramp generator and configured to low-pass filter the digital voltage ramp; a digital-to-analog converter having an input electrically coupled to an output of the digital low-pass filter and configured to generate an analog control signal based on the filtered digital voltage ramp; and a voltage regulator having an input electrically coupled to an output of the digital-to-analog converter and configured to regulate an output voltage based on the analog control signal and an input voltage of the voltage regulator.

The invention discloses a servo system integrating speed servo and position servo and a using method of the servo system, and belongs to the field of servo control. The servo system comprises an industrial personal computer, a multifunctional data acquisition card, a servo controller, a servo amplifier, a servo object and a D trigger; the multifunctional data acquisition card comprises a digital quantity output module, an analog quantity output module, a digital quantity input module and a counter module; and the servo object comprises a servo motor, a speed reducer, a load and an encoder which are sequentially connected in series. The servo system integrates the advantages of digital control and analog control, has the function of identifying the equivalent inertia of a servo object, can quickly carry out speed or position servo according to the use method disclosed by the invention, saves time, and is quick in system response, high in precision and hard in characteristic.

1. The name of the design product: programmable controller (VG700). 2. The use of the design product: used for switch logic control, analog control, motion control, process control, data processing and networking communication of intelligent manufacturing system equipment in automated production. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention belongs to the technical field of electronic equipment communication control, and provides a multi-electronic equipment communication method and system, and the method comprises the steps: responding to an access request of at least one slave device; detecting the slave device through the master control device to obtain the equipment type of the slave device; and according to the equipment type of the slave device, constructing a physical communication link between the master control device and the slave device, and sending the control data and the high data volume data to the slave device through the physical communication link. The method has the beneficial effects that compatible communication of high-speed equipment and low-speed equipment is realized through dynamic access and dynamic address allocation, stable transmission of speed data streams is carried out on a plurality of high-speed electronic devices, data transmission and control are not influenced by plugging of the high-speed electronic devices, and unified control of a system layer is realized; by simulating the existing pin resources of the control or feedback signal, the transmission of data with high data volume is performed without increasing additional pin resources.