31results about How to "Achieve optimal performance" patented technology

The invention provides an unmanned surface vessel full state constraint trajectory tracking control method based on the saturation compensation technology, relates to the unmanned surface vessel fullstate constraint trajectory tracking control method, and aims at solving the problem of high control error caused by the fact that the present control method for unmanned surface vessel trajectory tracking control does not process the problem of state constraints and saturation. The unmanned surface vessel full state constraint trajectory tracking control method comprises the steps that step one,the kinetic model of the unmanned surface vessel is established; step two, a saturation compensation auxiliary system is designed according to the kinetic model of the unmanned surface vessel established in the step one; step three, the saturation function of the unmanned surface vessel control law is established according to the saturation compensation auxiliary system designed in the step two; step four, the closed-loop system of the unmanned surface vessel is established; step five, the external interference is processed by using the adaptive method so as to obtain the adaptive estimation error; and step six, full state constraint trajectory tracking control of the unmanned surface vessel can be realized according to the adaptive estimation error obtained in the step five. The unmannedsurface vessel full state constraint trajectory tracking control method based on the saturation compensation technology is used for the field of trajectory tracking control.

The invention discloses a delay circuit and an electronic system having the same. The delay circuit may include an input terminal, an output terminal, a bias current generator, and a delay generator.The bias current generator is coupled between the first reference voltage and the second reference voltage and is used for generating a bias current. The delay generator is coupled between the first reference voltage and the second reference voltage and is used for generating delay of the delay signal relative to the input signal according to the bias current. The bias current generator comprisesa current mirror, a current module and a transistor. The delay generator includes a first current mirror circuit, a second current mirror circuit, a transistor, a capacitor, a switching circuit, and aSchmidt inverter, wherein an output terminal is coupled to the Schmidt inverter to output a delay signal. Compared with a traditional delay circuit, the delay circuit provided by the invention has lower power consumption and higher precision in process, voltage and temperature.

A method for performing sudden power off recovery management, a memory device, a controller, and an electronic device are disclosed. The method may include: triggering writing an expansion block; regarding a target block, setting a page count and a start page number for being processed with binary search; at least according to the page count and the start page number, performing the binary searchon the target block to find a first empty page within the target block; performing page-by-page search, starting from the first empty page in a backward direction within the target block, to find thelast valid page within the target block; determining an abandonment range within the expansion block according to the last valid page and the first empty page; and performing dummy programming on allexpansion pages within the abandonment range. When a power-off event occurs, the operation of the system is quickly recovered through a high-performance power-off recovery mechanism in the controller.

The invention discloses a power-on reset signal generator and a related electronic device. The power-on reset signal generator comprises a detection circuit and a comparator. The detection circuit detects a power supply voltage to generate a set of detection signals, and includes: a plurality of sets of transistors stacked and coupled between the power supply voltage and a ground voltage, each setof transistors including a first transistor and a second transistor respectively located in a first current path and a second current path; the first resistor and the second resistor are coupled between the two groups of transistors and are respectively positioned on the first current path and the second current path; and a third resistor coupled between the power supply voltage and the pluralityof groups of transistors. The comparator receives the set of detection signals from the detection circuit and compares the set of detection signals to generate a power-on reset signal. The power-on reset signal generator has the advantages that the power-on reset signal generator has high-precision control, and particularly, a voltage detection point VPOR required when a power-on reset signal isgenerated is irrelevant to temperature and a manufacturing process.

The present invention provides a method and an apparatus for spatial reuse enhancement in a multi-station environment. The method comprises the following steps: if the wireless communication device receives a receiving packet, checking a space reuse limit to carry out a first-stage space reuse judgment; if the space reuse limit meets the preset condition, triggering a transmission module to starta second-stage space reuse judgment; scanning at least one contention queue to obtain an index of the candidate station from the at least one contention queue; obtaining latest information of the candidate station from an internal database of the wireless communication device based on the index so as to calculate a threshold value special for the candidate station according to the latest information; and comparing an intensity indicator corresponding to the received packet with the threshold to generate a comparison result, so as to control triggering of a spatial reuse contention channel according to the comparison result.

A full-state constrained trajectory tracking control method for an unmanned water surface vehicle based on saturation compensation technology. The invention relates to a full-state constrained trajectory tracking control method for an unmanned surface surface vehicle. The present invention solves the problem that the existing control method for track tracking control of the surface unmanned vehicle does not deal with the problems of state constraints and saturation, resulting in large control errors. The present invention comprises: 1. establishing the dynamic model of the surface unmanned boat; 2: designing the saturation compensation auxiliary system according to the dynamic model of the water surface unmanned boat established in step 1; 3: designing the saturation compensation auxiliary system according to step 2, Establish the saturation function of the control law of the surface unmanned vehicle; 4: Establish the closed-loop system of the surface unmanned vehicle; 5: Use the adaptive method to deal with external disturbances, and obtain the adaptive estimation error; 6: According to the adaptive estimation error obtained in step 5, Realize the full state constraint trajectory tracking control of the surface unmanned vehicle. The invention is used in the field of trajectory tracking control.

The invention discloses a modular multilevel converter system and a control system and control method of the modular multilevel converter system. An upper computer control layer comprises an operation personnel monitoring system, wherein the operation personnel monitoring system is connected with a system control unit. A system-level control layer comprises the system control unit, wherein the system control unit connected with a valve control unit. A valve-level control layer comprises the valve control unit, wherein the valve control unit issues sub-modular trigger pulse signals to sub-modular controllers. A modular-level control layer comprises the sub-modular controllers, wherein the sub-modular controllers are arranged in sub-modulars of a modular multilevel converter valve in a dispersed mode, and each sub-modular controller is used for having control over connection and disconnection between an upper power modular and a lower power modular of the corresponding sub-modular. Integrated control over a whole modular multilevel converter is achieved at different control priority levels by adopting a layered structure with a plurality of control units according to the requirement of the modular multilevel converter for special control, and the good foundation is laid for large-scale engineering application of the modular multilevel converter.

The invention discloses a method for managing a security program library supporting data storage and an electronic device. The method comprises the following steps: respectively configuring at least one first sub-region and at least one second sub-region in a security program library region in a nonvolatile memory as an instruction region and a data region of the security program library; after the security program library is enabled, prohibiting any write operation and any erase operation from being applied to the security program library area by using a memory controller so as to protect thepredetermined instruction and the predetermined data respectively located in the instruction area and the data area; and after the security program library is enabled, reading the instruction area and the data area by using at least one processor through an instruction port and a data port of the at least one processor respectively. According to the invention, the security program library supporting data storage can be realized under the condition that the overall efficiency is not reduced, and the optimization efficiency of the electronic device is achieved.

The invention discloses a high-quality waveguide structure and a preparation method. The preparation includes metal chrome plating on the surface of a lithium niobate film, a femtosecond laser direct writing chrome film as a mask layer, chemical mechanical polishing, chemical vapor deposition, and lithium niobate. Thin film bonding and other steps. The preparation process of the method of the invention optimizes the configuration of the waveguide prepared by the chemical mechanical polishing process, and has the characteristics of ultra-low transmission loss and excellent electro-optical characteristics, provides a key step for realizing the industrialization of lithium niobate photonic devices, and can also promote Development of micro-nano photonics, integrated optics and microwave photonics.

The invention discloses an anti-corrosion model test method of a tubular water turbine, which can reasonably calculate the conductivity of the water medium according to the size of the real machine to configure the solution, and through the reasonable distribution and current adjustment of the electrodes that function as auxiliary anodes, the selection is reasonable The potential distribution of the site test can optimize the number of electrodes and the potential distribution, and guide the design of the electrochemical protection scheme of the real machine. At the same time, the invention can also evaluate and predict potential uniform corrosion, pitting corrosion, crevice corrosion, galvanic corrosion and other problems in the tubular turbine model through model tests, and provide reference for the design and manufacture of real units.

The invention discloses a clock fault detector, and the detector comprises a time sequence control signal generator and a clock fault detection module which can respectively generate a control signal according to a clock signal and perform clock fault detection according to the control signal respectively. The clock fault detection module may include a first integrator, a sample hold circuit, a second integrator, and a comparator. The first integrator can convert previous clock periods of the clock signals into reference voltages according to ping-pong mode control signals in the control signals. The sampling and holding circuit can sample and hold the reference voltage according to the ping-pong mode control signal; the second integrator can convert the current clock period of the clock signal into a ramp signal; and the comparator can compare the ramp signal with at least one reference voltage to generate a comparison result signal for indicating whether the clock signal is normal or not. Compared with a traditional architecture, the clock fault detector has higher precision in process, and can enable the electronic device to achieve optimized efficiency.

The invention discloses a dynamic bias current generator and a related electronic device. The dynamic bias current generator comprises a detection circuit and a current generation circuit. The detection circuit detects a power supply voltage to generate a detection signal, and comprises a current source and a first group of transistors located on a first path; a second group of transistors on thesecond path, control terminals of respective transistors of the first and second groups of transistors being coupled to each other; a first capacitor coupled to the supply voltage and other terminalsof the transistors in the second set of transistors; and a second capacitor coupled to control terminals of respective transistors of the first and second groups of transistors and a ground voltage. The current generation circuit includes: a plurality of transistors that generate a dynamic bias current according to a detection signal. The dynamic bias current can be used for increasing the reaction speed of the comparator and used in a power-down reset detection circuit. The advantages of the dynamic bias current generator are that the dynamic bias current generator enables the electronic device to obtain low power consumption and high speed performance at the same time.

The invention discloses a method and a device for message transmission. The method includes the steps as follows: a sender sets asides at least two queue elements for a control channel when the controThe invention discloses a method and a device for message transmission. The method includes the steps as follows: a sender sets asides at least two queue elements for a control channel when the contro avoid channel jamming when the control messages are transmitted.can avoid channel jamming when the control messages are transmitted.l channel is in an idle state and sets asides at least N+1 queue elements for the control channel when N control messages are to be sent; the sender fills up a control transmission negotiation requestl channel is in an idle state and sets asides at least N+1 queue elements for the control channel when N control messages are to be sent; the sender fills up a control transmission negotiation request message to a sending queue for sending before sending the control message and controls the number of data messages which are sent by a data channel to be not exceed a preset value before receiving amessage to a sending queue for sending before sending the control message and controls the number of data messages which are sent by a data channel to be not exceed a preset value before receiving acorresponding control transmission negotiation response message; and the sender respectively sets a first sign to the N control messages and then fills up the control messages to the sending queue forcorresponding control transmission negotiation response message; and the sender respectively sets a first sign to the N control messages and then fills up the control messages to the sending queue forsending after receiving the corresponding control transmission negotiation response message. The invention realizes reasonable distribution of bandwidth of a logical channel on a physical channel and sending after receiving the corresponding control transmission negotiation response message. The invention realizes reasonable distribution of bandwidth of a logical channel on a physical channel and can

The invention provides a method for managing hardware resources in an electronic device and a corresponding electronic device. The method includes: using a microprocessor in the electronic device to execute at least a part of a set of program codes to control the electronic device, wherein the plurality of operations of the electronic device includes a predetermined operation, and the set of program codes includes a set of program codes for controlling A predetermined program module for the predetermined operation, the predetermined program module includes a partial program, and the partial program provides a variable access service to the predetermined program module; and the microprocessor is used to execute the partial program to control the electronic device Carry out the scheduled operation.

The invention discloses a high-quality waveguide structure and a preparation method thereof. The preparation method comprises the steps of plating a metal chromium film on the surface of a lithium niobate film, directly writing the chromium film by femtosecond laser as a mask layer, conducting chemical mechanical polishing, performing chemical vapor deposition, bonding the lithium niobate film and the like. The preparation process of the method optimizes the configuration of the waveguide prepared by the chemical mechanical polishing process, has the characteristic of ultralow transmission loss and excellent electro-optical characteristic, provides a key step for realizing industrialization of the lithium niobate photonic device, and can promote the development of micro-nano photonics, integrated optics and microwave photonics.

The present invention provides a method for processing antenna tuning parameters and a mobile terminal. The processing method includes: when the mobile terminal is in a call state or in a data transmission state, a communication processor receives data reported by a sensor of the mobile terminal; The communication processor determines the scene where the mobile terminal is located according to the data reported by the sensor; wherein the scene where the mobile terminal is located is used to identify the relative positional relationship between the mobile terminal and the mobile terminal user; the The communication processor acquires pre-stored antenna tuning parameters corresponding to the scene where the mobile terminal is located, and writes the antenna tuning parameters into the antenna tuner. In the embodiment of the present invention, the real-time update of the scene of the antenna tuner is realized by tightly coupling the communication processor and the sensor.