507results about How to "Reduce control complexity" patented technology

The invention discloses a method for determining a satellite counterglow oriented object posture based on double-vector azimuth information by using a resolving method, in particular an object posture determining method for making a star sensor effectively avoid ground gas light influence. The method can ensure an object concerned by a satellite posture orientation, and at least one star sensor is available in the whole process. The satellite counterglow oriented object posture is determined by finding a condition of making the star sensor furthest avoid the ground gas light interference influence, combining the counterglow orientation requirement and using the simple resolving method of double-vector posture fixation. The method solves the problem of a method which must combine a star rotating trial to establish the proper target posture, is favorable for reducing and controlling the complexity, cost and risk, and overcomes the defects that the conventional method cannot perform off-line pre-design and previously avoids the ground gas light interference influence.

The invention discloses a DC residential energy router based on a multi-port converter and a control method thereof. The energy router is characterized in that the energy router is composed of four H bridge modules, two-way buck/boost converter modules BB1 and BB2, four external series inductors, and a high-frequency four-winding transformer; driving signals used to control on-off of full-control power devices in the converter modules BB1 and BB2 are obtained by means of pulse width modulation; and driving signals used to control on-off of full-control power devices in the H bridge modules are obtained by means of single phase shift modulation. The energy router integrates photovoltaic energy, stored energy, a power grid, and a residential load with different voltage grades. Two-way power flow between stored energy and the power grid is realized. Maximum use of renewable energy, reduction in power exchange with the power grid, charge and discharge based on stored energy, input source use priority, control on port voltages and power balance control in the system are realized.

A biominetic crop picking robot comprises picking pipes based on pneumatic artificial muscle, a generator used for feeding air pressure into inner cavities of the picking pipes, pneumatic pressure rate control valves used for controlling the air pressure fed into the inner cavity of each picking pipe, a pressure sensor used for detecting air pressure fed into the inner cavity of each picking pipe, a pneumatic pressure rate controller used for coordinating and controlling each pneumatic pressure rate control valve, a pulse type vacuum generation module used for sucking picked objects, a picking control subsystem used for controlling and performing picking action, a container used for collecting the picked objects, a microprocessor used for intelligently analyzing a video, autonomously navigating and controlling the action of the picking pipes based on the pneumatic artificial muscle and a walking part used for the work of a picking robot in a picking crop area. The biominetic crop picking robot has the advantages of excellent natural flexibility, simple mechanism, low control complexity, high picking efficiency, excellent environmental adaptability, and low manufacturing and maintenance costs.

The invention discloses a dynamic bandwidth allocation algorithm applied to an OFDM-PON (Orthogonal Frequency Division Multiplexing-Passive Optical Network) system and belongs to optical fiber communication systems. The invention utilizes an interruption application response method to realize the bandwidth request and allocation; a plurality of subcarriers in the system are divided into three parts, namely, a communication channel control part, an ONU (Optical Network Unit) default bandwidth part and a part stored in a dynamic pool; when the load on the link is light, each ONU compares respective local flow with local threshold value so as to decide whether an interruption application for extra bandwidth is started; and when the load on the link is heavy, an OLT (Optical Line Terminal) allocates the surplus subcarriers based on the requiring ratio of the ONUs under the condition that the rated bandwidth of the ONUs is met firstly, so as to realize dynamic allocation. The invention ensures low time delay and low package loss rate of a high priority service, also performs bandwidth allocation as required, and can meet the equal allocation between the ONUs and the equal-level priority service when the load of link service flow is heavy.

The invention relates to a modular under-actuated mechanical arm, in particular to a three-finger-three-knuckle under-actuated mechanical arm with a finger tail end path being controllable. The three-finger-three-knuckle under-actuated mechanical arm with the finger tail end path being controllable is used for solving the problem that because of the coupling of the joint movement of an under-actuated mechanical arm, the finger tail end path is not certain during movement, and then an existing under-actuated mechanical arm loses necessary finger flexibility. A finger rotation motor (71) is installed in the middle of three under-actuated fingers which are triangularly arranged. A drive gear (72) is installed on an output shaft of the finger rotation motor (71). A first driven gear (73) and a second driven gear (74) are arranged on connection sleeves (2) of two adjacent under-actuated fingers, the drive gear (72) is meshed with the first driven gear (73), and the first driven gear (73) is meshed with the second driven gear (74). The three under-actuated drive fingers are installed on an under-actuated mechanical arm base (70). The three-finger-three-knuckle under-actuated mechanical arm with the finger tail end path being controllable is used as a tail end execution mechanical arm of an intelligent robot.

The invention discloses a chained SVG module voltage-equalizing control method and circuit. Each phase of power module in a three-phase power module comprises a plurality of H-bridge modules, a central controller, a plurality of sampling controllers and a plurality of voltage-equalizing branch circuits. A direct current side capacitor of each H-bridge module is connected with one voltage-equalizing branch circuit in parallel, a direct current bus of each H-bridge module is connected with one sampling controller, a data output end of each sampling controller is connected with an input end of the central controller, a control input end is connected with an output end of the central controller, and a control output end is connected with a control input end of each voltage-equalizing branch circuit. The central controller is used for collecting voltage values of the direct current buses of all the H-bridge modules in a link through the sampling controllers, carrying out averaging operation and voltage-equalizing control operation on the direct current voltage values, and emitting control pulses of the H-bridge modules through optical fibers. The chained SVG module voltage-equalizing control method can ensure that the H-bridge modules are completely uniform, the process is simple, and mass production is facilitated. The voltage-equalizing effect is irrelevant to the strength of current, so a promising result can be achieved when the current is quite weak.

The present invention relates to the intelligent control technology of engineering machines, construction machines and building machines. The distributive hierarchy intelligent tree control mode of asphalt concrete road constructing machinery includes four control unit of central intelligent control, intelligent mixing control, intelligent spreading control and intelligent densifying control. The central intelligent control controls the other control units and the transport system, the intelligent mixing control unit controls the production of intelligent loaders and intelligent stirrers and the transport of dumpers, the intelligent spreading control unit controls the dumpers and the intelligent spreaders to complete the spreading job, and the intelligent densifying control unit controls the intelligent road roller to complete the rolling job. The present invention has the advantages of dispersed intelligence, power error tolerance, high reliability and high construction quality.

The invention discloses a solar tracking device for a solar collector, comprising a driving mechanism, a polar axis rotating mechanism which is matched with the driving mechanism to rotate the polar axis of the solar collector, and a season shaft rotating mechanism, wherein, the season shaft rotating mechanism is optionally matched with the polar axis rotating mechanism to drive the season shaft of the solar collector to rotate. In the invention, only one driving mechanism is required to achieve rotation of the polar axis and the season shaft without arranging a single driving mechanism for each shaft, thus reducing the system overall cost and control complexity.

The invention belongs to the technical field of digital micro-fluidics, and in particular relates to a liquid drop mixing unit based on an electro-wetting digital micro-fluid chip. The mixing unit comprises three parts consisting of an inlet zone, a mixing zone and an outlet zone; the fast, high-efficiency, automatic and reliable mixing of the liquid drops can be realized via the special bidirectional driving electrode and closed-loop electrode arrangement and simplified electrode connection mode. The liquid drop mixing unit has the advantages of novel design, easiness in control, high reliability, excellent practicability, high automation degree, and the like, so that the liquid drop mixing unit can be widely used in various digital micro-fluid chips.

The invention discloses a humanoid robot foot plate mechanism with multiple degrees of freedom, which belongs to the technical field of robots and comprises a central fixing plate and four foot plates. Two connecting plates are respectively hinged on each of the front side and the rear side of the central fixing plate, and each connecting plate is correspondingly connected with one of the foot plates, so that the four foot plates are respectively positioned on the left front side, the right front side, the left rear side and the left rear side of the central fixing plate. A torsion spring is mounted on a rotating shaft of each hinge. When the various foot plates in the foot plate mechanism contact with an uneven ground, a certain angle is formed between each foot plate and the corresponding connecting plate according to curvature of the ground surface contacting with the foot plate due to the effect of the corresponding torsion spring, and accordingly, a spatial supporting surface with at least four contact points is formed by the foot plate and the ground; and when the foot plates leave away from the ground, initial states of the foot plats are restored under the effects of the torsion spring. The humanoid robot foot plate mechanism is simple in structure, the foot plates can adaptively fit with an optional rough ground without being driven, the problem of matching the foot plates with the uneven ground is solved, and the characteristic and a function of automatically adapting to concave and convex changing ground surfaces and shapes are realized.

The invention relates to a display device. The display device comprises a backlight module and an array substrate, wherein the array substrate comprises a base, thin-film transistors which are arranged in a first area at one side of the base and a photoelectric sensor which is arranged in a second area at one side of the base and is used for recognizing fingerprints according to received invisiblelight; the backlight module comprises a plurality of first light sources and at least one second light source corresponding to the second area; the second light source is used for emitting invisiblelight; when the photoelectric sensor is located a state of being about to recognize fingerprints, a control chip controls the thin-film transistor, corresponding to the second area, in the thin-film transistors and the second light source to be opened. According to the display device, the second light source corresponding to the second area is additionally arranged in the backlight module, so thatinvisible light can be emitted to be recognized by the photoelectric sensors, thereby avoiding the influences, on fingerprint recognition, of visible light in external environment and ensuring the correctness of recognition results.

The invention discloses a rope parallel device based on a translation constraint structure. The device comprises a static platform, an intermediate platform and a moving platform, wherein rollers and driving units are arranged on the static platform; ropes wind around the rollers and the driving units and are connected with the moving platform; the intermediate platform is connected with the static platform and the moving platform by the aid of rigid rod pieces, each rigid rod piece comprises rigid rods and hinge devices at two ends, and the rigid rods which are equal in length and are parallel constitute parallelogram mechanisms; and springs are connected on diagonal lines of the parallelogram mechanisms and are in the stretched state to provide tension for the ropes. The terminal degree of freedom of a rope parallel mechanism is constrained by the aid of a translation mechanism, and the device inherits the advantages of simple structure, high carrying capacity, easy mounting and dismounting and the like of the rope parallel mechanism and effectively avoids terminal attitude errors, so that the terminal trajectory accuracy is improved.

The invention discloses a quad-rotor unmanned helicopter explicit prediction control method based on heuristic bionic loft optimization. The method comprises the following steps that 1, a quad-rotor unmanned helicopter model is built according to aerodynamics and kinematics, and a relation between the controlled quantity and the state quantity is given; 2, a loft optimization algorithm is initialized, and the number D of sampling points required in a linearization track is given; 3, a cost function is designed; 4, map compass factors are utilized for optimization; 5, loft optimization landmark operators are utilized for optimization; 6, sample target points optimized by a loft are obtained to construct a linear interpolation function; 7, the interpolation function optimized by the loft is applied to the model obtained in the first step; 8, simulation or experiments are performed to obtain related results and verification. According to the method, the control complex difficulty can be lowered, the problem that explicit prediction control has the high requirement for the track and is hard to apply is solved, the online optimization process is avoided, a large amount of time is saved, and the control cost is lowered.

The invention discloses a direct power active disturbance rejection control method for a three-phase voltage source PWM rectifier. The method includes the following steps that the input instantaneous active power and the input instantaneous reactive power of the three-phase voltage source PWM rectifier are obtained; the instantaneous active power and the instantaneous reactive power serve as input of an expanded state observer, and based on the real-time observation value, the active power instruction value and the reactive power instruction value of system disturbance quantity, active power control quantity and reactive power control quantity can be respectively obtained according to the active power control rate and the reactive power control rate; according to the active power control quantity, the reactive power control quantity and a network voltage sampling value, the alpha-beta axis component instruction value of the input voltage on the alternating-current side of the rectifier is calculated; according to the alpha-beta axis component instruction value of the input voltage on the alternating-current side of the rectifier, a rectifier switching signal is obtained through a PWM module. Through the method, direct power control over the rectifier is achieved in a static coordinate system, no phase-locked rings are needed, and phase information of network voltage does not need to be detected in real time.

The plug-and-play mechanical arm system based on distributive control in robotic technology includes system unit, USB interface module, central controller, internal distributive control system and mechanical arm. The system unit is connected via a USB cable with USB interface module, and the central controller is located between the USB interface module and the internal distributive control system, which are connected to the central controller via parallel bus. The internal distributive control system consists of several parallel subsystems with the same functions, and each of the subsystems includes one PID controller, one DC motor driver and one DC motor with feedback; and connected via control lines to the mechanical arm. The present invention provides complete interface and control scheme for the popular future robot.

The invention discloses a play scene reduction method, a system, a playing terminal and a control terminal. The play scene reduction method comprises steps of receiving play scene obtaining request transmitted by the control terminal of a main playing device, wherein the play scene obtaining request comprises first account information of logging of a target APP, determining whether a record matching with first account information exists in a scene database by the main play device, if yes, transmitting description information of K play scenes contained in the record matching with the first account information to the control terminal, receiving a target scene reduction order transmitted by the control terminal by the main playing device, obtaining the playing parameters of the target play scene from the record according to the description information of the target play scene, and forwarding the playing parameters of the target playing scene from the playing device. The invention can realize the fast reduction of the playing scene and can reduce the control complexity.

A read clock circuit for a disk drive includes a phase-locked loop/voltage controlled oscillator (VFO/PLL) and a frequency synthesizer. The VFO/PLL receives a servo sector transition signal that is related to detected transitions in a servo sector field of a magnetic recording disk, and outputs a servo frequency signal that is synchronous to the servo sector transition signal. The frequency synthesizer receives the servo frequency signal and generates the read clock signal that is synchronous with the servo frequency signal. In a banded recording disk drive the frequency synthesizer generates a unique read clock signal for each data band.

A group timing delay device shifts the timing of drop formation waveforms supplied to drop formation devices of one of first and second nozzle groups so that print drops from the nozzle groups are not aligned relative to each other along a nozzle array direction. A charging device includes a common charge electrode associated with liquid jets from the nozzle groups and a source of varying electrical potential between the charge electrode and liquid jets which provides a charging waveform that is independent of a print and non-print drop pattern. The charging device is synchronized with the drop formation devices and the group timing delay device to produce a print drop charge state on print drops of a drop pair, a first non-print drop charge state on non-print drops of the drop pair, and a second non-print drop charge state on third drops.