13results about "Trigometric functions" patented technology

The invention relates to the technical field of intelligent mines, and discloses a geological guarantee intelligent planning mining system based on deep reinforcement learning, which comprises a geological guarantee basic module, an intelligent planning engine module and a closed-loop execution system module, the geological guarantee basic module constructs a dynamic probabilistic digital twinning environment through a geological uncertainty implicit neural field, and realizes data real-time fusion updating in combination with a gradient flow; the intelligent planning engine module realizes long-period risk perception planning based on a geological perception Markov decision process and a causal world model; the closed-loop execution system module deploys a lightweight model through strategy distillation, establishes a twinborn reality bidirectional evolution closed loop, and realizes planning and execution adaptive collaboration; according to the method, the problems of static fragility of geological guarantee, short view non-strategy planning and system splitting open loop of a traditional mining system are solved, full-life-cycle dynamic cognition, deep planning and closed-loop self-evolution of a mine are achieved, and mining benefits and safety are remarkably improved.

The application discloses a kind of active vibration reduction reference signal generation methods based on deep learning, it is related to signal generation technical field, comprising: creating superimposed mixed signal dataset, sample expansion is done to mixed signal dataset, obtain sample dataset, wherein, sample dataset contains real label;Depth convolutional neural network model is built;Sample dataset is divided into training set, verification set and test set, obtain the depth convolutional neural network model after training;Obtain the mixed signal to be estimated, input model in the mixed signal to be estimated and carry out prediction, obtain prediction result, generate corresponding sinusoidal wave according to prediction result.The application can adapt to any external excitation form existing in active vibration reduction, real-time track feature line spectrum existing in external excitation in control process, effectively deal with excitation frequency amplitude variation, structure response mutation and other problems, realize the stable generation of reference signal, guarantee control stability.

The application provides a curve fitting method and device based on a drawing tool and a computer device, and relates to the technical field of machining, and aims to improve the accuracy of curve fitting. The method comprises the following steps: determining a fitting region containing an original curve, performing at least one sub-fitting operation on the original curve in the fitting region until a curve fitting end condition is met, and generating a fitting curve corresponding to the original curve based on a fitting arc corresponding to each sub-fitting operation; wherein the i-th sub-fitting operation of the at least one sub-fitting operation comprises the following steps: generating a fitting arc corresponding to the i-th sub-fitting operation in the fitting region based on a first tangent arc tangent to the original curve, the first tangent arc passing through an arc starting point corresponding to the i-th sub-fitting operation, and the i is an integer greater than 0. The method can segment the original curve in the fitting region for fitting, and the accuracy of the obtained fitting curve is improved.

The application relates to the technical field of intelligent mines, and discloses a geological guarantee intelligent planning and mining system based on deep reinforcement learning, which comprises a geological guarantee basic module, an intelligent planning engine module and a closed-loop execution system module; the geological guarantee basic module constructs a dynamic probabilistic digital twin environment through a geological uncertainty implicit neural field, and realizes real-time data fusion and update in combination with gradient flow; the intelligent planning engine module realizes long-period risk perception planning based on a geological perception Markov decision process and a causal world model; the closed-loop execution system module deploys a lightweight model through strategy distillation, establishes a twin reality bidirectional evolution closed loop, realizes adaptive cooperation of planning and execution, and solves the problems of static vulnerability of a conventional mining system, short-sighted non-strategy planning and system fragmentation and open loop, realizes dynamic cognition, far-reaching planning and closed-loop self-evolution of the whole life cycle of a mine, and significantly improves mining efficiency and safety.

Apparatuses, systems, and methods for sine wave generation based on a flexible pulse width modulation (PWM) technique. An exemplary apparatus may comprise a sine wave generator circuitry and a pulse width modulation timer circuitry coupled to the sine wave generator circuitry. The sine wave generator circuitry may comprise a phase accumulator circuitry and a phase to amplitude conversion circuitry coupled to the phase accumulator circuitry. The phase accumulator circuitry may be configured to receive a digital input value and output phase values. The phase to amplitude conversion circuitry may be configured to receive the phase values and output digital sine values. The pulse width modulation timer circuitry may be configured to receive the digital sine values and output at least one pulse width modulation signal for generation of an analog carrier wave signal. A frequency of the analog carrier wave signal may be based on the digital input value.

A method for an associative memory device includes the steps of providing a look up table (LUT) with all possible solutions for N first iterations of a CORDIC algorithm, receiving a plurality of input angles, concurrently computing a location index for each angle of the plurality of angles and concurrently storing each index in a column of the associative memory device, copying a solution from the LUT in the location index to a plurality of columns associated with the index and concurrently performing M additional iterations of the CORDIC algorithm on the columns to compute a value of a trigonometric function for each angle.

The embodiment of the invention provides a method for generating an intermediate-frequency sinusoidal signal and a related device. The method comprises the following steps: acquiring a first sinusoidal signal and an envelope signal in response to a first user operation; and modulating the first sinusoidal signal according to the envelope signal to determine a second sinusoidal signal. According to the embodiment of the invention, the intermediate-frequency sinusoidal signal can be synthesized through the micro-control unit MCU with low cost. And the cost of synthesizing the intermediate-frequency sinusoidal signal is reduced.

The application provides a power waveform generator with a four-quadrant feedback loop and a control method thereof. The generator is controlled by a user through a host computer and a graphical interface to output a first control signal and a second control signal. The first control signal is input to an FPGA+ARM main control board, parsed into secondary instructions and sent to an auxiliary FPGA, and then used to control a digital-to-analog converter to generate a digital-to-analog converted signal and output the signal to a four-quadrant analog feedback loop to generate an arbitrary waveform signal. The second control signal is directly used to control a bias adjustment circuit to output a suitable bias signal to the four-quadrant analog feedback loop. The four-quadrant analog feedback loop superimposes and processes the received signal to output a voltage and current signal to a bit number expansion circuit, and further drives an operational amplifier bootstrap network to generate a voltage drive waveform, and then generates an arbitrary-shaped power waveform through a push-pull output network.

The invention relates to sine wave generation based on flexible pulse width modulation (PWM) technology. Apparatus, systems, and methods for sine wave generation based on flexible pulse width modulation (PWM) techniques. An example apparatus may include sine wave generator circuitry and pulse width modulation timer circuitry coupled to the sine wave generator circuitry. The sine wave generator circuitry may include phase accumulator circuitry and phase-to-amplitude conversion circuitry coupled to the phase accumulator circuitry. The phase accumulator circuitry may be configured to receive a digital input value and output a phase value. The phase-to-amplitude conversion circuitry may be configured to receive the phase value and output a digital sinusoidal value. The pulse width modulation timer circuitry may be configured to receive the digital sinusoidal values and output at least one pulse width modulated signal for generating an analog carrier signal. The frequency of the analog carrier signal may be based on the digital input value.

Apparatuses, systems, and methods for sine wave generation based on a flexible pulse width modulation (PWM) technique. An exemplary apparatus may comprise a sine wave generator circuitry (102; 304; 402) and a pulse width modulation timer circuitry (108; 329; 424) coupled to the sine wave generator circuitry. The sine wave generator circuitry may comprise a phase accumulator circuitry (104; 304; 404) and a phase to amplitude conversion circuitry (106; 316; 414) coupled to the phase accumulator circuitry. The phase accumulator circuitry may be configured to receive a digital input value (101; 301; 401) and output phase values (103; 309; 405). The phase to amplitude conversion circuitry may be configured to receive the phase values and output digital sine values. The pulse width modulation timer circuitry may be configured to receive the digital sine values and output at least one pulse width modulation signal (325A, 325B; 425A, 425B) for generation of an analog carrier wave signal (107; 331; 513). A frequency of the analog carrier wave signal (107; 331; 513) may be based on the digital input value (101; 301; 401).

The application discloses a kind of spacecraft ground microgravity simulation platform similarity analysis method, belong to space technology technical field.The following steps are included: the space dynamics model of spacecraft ground microgravity semi-physical simulation platform is established and the space dynamics model is rewritten to Lagrange dynamics, and the rewritten simulation platform is obtained;Similarity analysis is carried out on spacecraft ground microgravity semi-physical simulation platform and the rewritten simulation platform based on π theorem, and the space satellite platform parameters involved are obtained to determine the design parameters of the rewritten simulation platform;Space attitude scanning trajectory and attitude scanning PID control law are designed for the space satellite platform involved, and the space attitude scanning PID control law is obtained;Similarity analysis is carried out on space attitude scanning PID control law based on π theorem, and the ground microgravity simulation platform attitude scanning PID control law parameter is designed, to obtain ground space attitude scanning PID control law.The dynamics and control effect of the platform can be consistent with the effect of space actual satellite.

The application discloses a multi-exponential decay sinusoidal signal (MEDS) multi-channel under-sampling hardware implementation method. Since under-sampling of the MEDS signal can cause frequency ambiguity, the application adds an auxiliary sampling channel to avoid the occurrence of the phenomenon. For P MEDS signals with a common support model in the frequency domain, the application needs at least P samples to accurately estimate the parameters of the signals. The application greatly reduces the number of samples and the number of sampling channels required for signal parameter measurement, and has higher reconstruction precision and noise robustness than the traditional method.

To solve the problem of the present application, the trigonometric function operation device has: an address generator that generates an address signal composed of a plurality of bit strings corresponding to phases; a trigonometric function table that stores a first sine and a first cosine corresponding to phases indicated by high-order bits of the address signal, and a second sine and a second cosine corresponding to phases indicated by low-order bits of the address signal; an operation circuit that outputs a sine corresponding to the address signal as an operation value through an operation process using the first sine, the first cosine, the second sine, and the second cosine corresponding to the address signal extracted by referring to the trigonometric function table; and a correction unit that corrects the operation value based on a correction value corresponding to the address signal.