36results about How to "Eliminate Control Errors" patented technology

The invention discloses a transverse and longitudinal coordination control trajectory following up control method of an unmanned vehicle. According to the transverse and longitudinal coordination control trajectory following up control method, a control system in the control method comprises an information receiving module, a calculation solving module and a control command sending module. The control method comprises the following steps of step 1, receiving information: receiving information through the information receiving module; step 2, solving calculation: solving calculation through the calculation solving module; and step 3, enabling the control command emitting module to firstly transform front wheel turning angle and wheel driving/braking torque into direct controlling quantity of an executing mechanism. The method has the beneficial effects that the relationship of transverse motion and longitudinal motion of the unmanned vehicle is established by adopting transverse and longitudinal coordination control; and compared with independent control of transverse motion and the longitudinal motion, the transverse and longitudinal coordination control has the advantage that the control error caused by the coupling of transverse and longitudinal motion is eliminated, and the robustness of the control system is increased.

The embodiment of the invention provides a command processing method, a command processing device and a command processing system. The method comprises the steps of: receiving multiple voice commands sent by a voice analysis server, wherein the multiple voice commands are generated after source voice commands coming from different voice control devices are analyzed by the voice analysis server; respectively judging if any two voice commands in the multiple voice commands are similar commands, wherein the similar command is a voice command corresponding to the source voice command obtained by using different voice control devices to capture same voice information; and discarding one voice command in two similar voice commands when two voice commands existing in the multiple voice commands are similar commands. The embodiment of the invention further provides a command processing device and a command processing system. With the adoption of the embodiment, the control mistake brought by the repetitive execution of commands is eliminated.

The invention provides an automatic gauge control (AGC) method for a rolling mill, which comprises AGC. The AGC comprises the following steps of: sampling by using detection devices; transmitting a signal to a rapid analog quantity IO, a rapid digital quantity IO, a relative incremental coder and an absolute incremental coder; converting the signal into a digital signal; transmitting the digital signal through a VME bus and saving the digital signal in a dynamic memory; performing processing and calculation through a high-performance control device to generate a control signal; and outputting the control signal and a control value to a hydraulic performing device by passing through the VME bus, the rapid analog quantity IO and the rapid digital quantity IO in turn to fulfill the aim of hydraulic AGC of the rolling mill. An AGC feedforward control device, a flow rate per second control device and a feedback control device of the rolling mill are combined to provide a set of high-precision data tracking solution for input and output signals, so the aim of precisely controlling the thickness of output strip steel of the rolling mill is fulfilled.

The invention divides a microgrid control structure into a communication system and a physical system based on the concept of an information physical fusion system, and a novel distributed control strategy is proposed on this structure to improve a control effect of voltage and angular frequency by traditional droop control. Firstly, a microgrid communication system model is proposed based on graph theory knowledge, and communication structures of a plurality of single distributed power supplies form an integral communication system; secondly, in the communication system, a method combining areverse neural network and prediction control is proposed to solve the problem of communication time lag; a novel consistency protocol with a virtual navigator is proposed to solve the problem of packet loss; thirdly, in the physical system, P-omega/Q-U droop control is used as primary control of voltage and angular frequency; and finally, voltage and angular frequency data in the communication system and the proposed novel consistency protocol are utilized to complete secondary control of voltage and angular frequency output by droop control in the physical system, and the control strategy has a distributed cooperative characteristic.

The invention discloses an intelligent drawing management system. The intelligent drawing management system comprises a monitoring module, a feeding control module, a drafting control module, an output control module and a remote management center, and the monitoring module, the feeding control module, the drafting control module and the output control module are connected with the remote management center. The remote management center calculates cotton feeding, drafting and cotton outputting regulation and control parameters according to monitoring data and sends the cotton feeding, draftingand cotton outputting regulation and control parameters to the cotton feeding control module, the drafting control module and the cotton output control module respectively to control the drawing process, the quality of cotton slivers is monitored in real time, the drafting speed is regulated and controlled in real time, the optimal adaptive regulation and control of the drafting speed and the cotton sliver uniformity are realized, so that the uniformity of the output cotton slivers is obviously improved.

The invention provides a rotating speed control method and device of a wind turbine generator system. The rotating speed control method comprises the steps that whether the current impeller rotating speed of the wind turbine generator system is in a rotating speed interval corresponding to a resonance band or not is determined; when the current impeller rotating speed is in the rotating speed interval, resonance recognition is executed to determine whether a resonance risk exists or not; and when it is determined that the resonance risk exists, execution is carried out to enable the current impeller rotation speed to jump to rotation speed avoiding control of the preset impeller rotation speed so as to avoid the resonance risk. According to the rotating speed control method and device of the wind turbine generator system, the reliability and the generating capacity of the wind turbine generator system can be improved.

The invention discloses a self-adaptive defrosting control method of an air-cooled heat pump system. The self-adaptive defrosting control method is characterized by comprising the following steps of:setting four control parameters: (1) setting a defrosting time set value; (2) setting a temperature difference value entering a defrosting cycle; (3) setting a fin temperature exiting the defrosting cycle; and (4) setting an interval time (defrosting cycle) of two defrosting cycles, comparing actual defrosting time with set defrosting time, recording a ratio of the actual defrosting time to the set defrosting time each time, setting an interval according to a ratio range, determining a defrosting interval time according to an interval range to which the defrosting interval time belongs, takingtwo times of defrosting time as a correction interval, adjusting the set value of the defrosting interval time according to two defrosting time intervals recorded by the current times and the previous times, and continuously correcting the defrosting cycle to enable the defrosting cycle to automatically adapt to the change of the temperature and humidity of the environment with a self-correctionvariable step length.

The invention discloses a synchronization method of an online vision positioning system. The synchronization method comprises the steps of triggering a camera to photograph by a camera trigger signal output from the vision positioning system, transmitting the camera trigger signal to a servo control system so as to initiate interruption of the servo control system, recording a real-time position of a servo motor corresponding to a camera trigger moment through communicating the servo control system with the servo motor by means of a real-time bus, and ensuring that an absolute position of the servo motor is recorded by the servo control system at any moment when the camera photographs a picture, thereby realizing true synchronization between a servo controller and the vision positioning system. By adopting the synchronization method, a labeling machine main shaft rotating angle required for 360-degree imaging is reduced, thus the positioning system requires smaller installation space, the control errors of camera mechanical installation and the servo system are eliminated, the prepositioning precision is improved, the online vision positioning system is more compact, and the market application of the online vision positioning system is wider.

The invention provides a fixed adjustable solar support controlled by a pulley block. One end of a lower locating support is fixedly connected with the inside of one end of each supporting frame, and one end of an upper locating support is fixedly connected to a solar assembly bracket above the corresponding lower locating support; a rotary shaft of a rotary wheel is mounted outside the end part of one supporting frame, and a fixed pulley of the pulley block is further mounted on the supporting frame nearby the corresponding lower locating support; one end of a first steel cable is fixedly connected to the rotary wheel, and the other end of the first steel cable penetrates the pulley block, goes out of a movable pulley of the pulley block and is fixedly connected to the fixed pulley; a guiding fixed pulley is mounted at the end part of one supporting frame mounted on a middle supporting column, one end of a second steel cable is fixedly connected to the movable pulley of the pulley block, and the other end of the second steel cable winds around the fixed pulley and is then fixedly connected to one cross beam. The fixed adjustable solar support has the advantages that the pulley block is adopted to reduce the driving force by high power, the labor intensity during adjustment of an elevation angle can be effectively reduced in manners such as flexible adjustment, rigid fixation and the like, and equipment is convenient to maintain and repair.

The invention provides a fixed adjustable solar bracket employing multiple groups of parallel pulley blocks. The fixed adjustable solar bracket comprises multiple single-group brackets, wherein solar assembly brackets of the multiple single-group brackets are taken as a whole; each single-group bracket comprises one solar assembly bracket; the solar assembly bracket is aligned through positioning holes in an upper positioning bracket and positioning holes in a lower positioning bracket and then can be inserted into a positioning pin to be fixed; each solar assembly bracket drives a control pulley block through a rotating wheel; and each control pulley block drives branch ropes to adjust the angle. The multiple single-group brackets are connected in parallel, so that the bracket can be suitable for a large photovoltaic power station. Through resistance-reducing pulley blocks, the resistance of the integral solar assembly brackets in the angle adjusting process can be reduced.

A bidirectional hydraulic magnetic control valve capable of continuously draining water comprises a valve body, the valve body is divided into a drainage area and a control area, the drainage area comprises a water inlet, a buffer cavity, a first drainage port and a second drainage port, and the conical channels are both formed between the first drainage port and the buffer cavity and between thesecond drainage port and the buffer cavity respectively. According to the present invention, the synchronous control of the two valve mechanisms is achieved through the hydraulic magnetic control mechanism, the control errors are eliminated, and the influence of control on the drainage is reduced. The conical channels of a water impurity blocking device are solved by the conical thorns, the impactforce of the water flow on the valve mechanism is reduced through the buffer cavity, and a first electromagnetic disc and a second electromagnetic disc are buffered through the hydraulic oil in a hydraulic cavity to control a strong magnetic block to move, so that a buffer mechanism does not need to be additionally arranged. The pressure pushing is horizontal and uniform through the communicationof the multiple hydraulic cylinders of the same valve mechanism, and the bidirectional hydraulic magnetic control valve is of an integral structure and is more convenient to assemble and disassemble.