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

The invention is a track slab grinder, and relates to a special grinder for grinding a track slab. The track slab grinder comprises left and right main foundation walls and left and right grinding wheels. The key technology thereof is as follows: the left and right main foundation walls are respectively provided with a main longitudinal girder provided with a main longitudinal guide rail, a main transverse beam is arranged between the main longitudinal guide rails and is provided with left and right transverse guild rails respectively, the transverse guild rail is installed with a transverse sliding box which is internally provided with a vertical guild rail, an inner box is mounted on the vertical guild rail, a main shaft direction adjusting box is arranged at the lower end part of the inner box, a grinding head is arranged at the lower side of the main shaft direction adjusting box, a grinding wheel is mounted on the main shaft of the grinding head, and the main shaft of the grinding head is driven by a hydraulic motor. The track slab grinder in the invention can finish processing both sides of a bearing block at one time, has the advantages of high integral strength, stable movement, good rigidity, high processing efficiency, and can process a standard track slab as well as a track slab grinder of a non-standard track slab.

The invention discloses a phase detection method based on adaptive filtering. The method comprises the following steps: performing time-frequency domain transformation on input signals and estimating the approximate frequency value of the input signals in a frequency domain; adjusting the estimated approximate frequency value till the error of the approximate frequency value is not enough to causeburden for signal phase detection; detecting the amplitude and phase of sinusoidal signals with known frequency according to adaptive notch algorithm; and utilizing the negative entropy of Gaussian white noise to check and adjust estimated signals. The method provided by the invention has higher precision than the prior phase detection method, and uses the negative entropy to determine result precision so as to enable algorithm selection to have evidence to be found. The method provided by the invention has certain stability to the phase difference measurement with different signal-to-noise ratio, frequency and initial phases, and is suitable for various applications needing precise signal phase difference measurement.

The invention provides a rotational speed control method and device for a wind power generating set. The speed control method includes: determining whether the current speed of the impeller of the wind turbine is in a speed range corresponding to the resonance zone; when the current speed of the impeller is in the speed range, performing resonance identification to determine whether there is a risk of resonance; When there is a risk of resonance, a rotational speed avoidance control that causes the current rotational speed of the impeller to jump to a predetermined rotational speed of the impeller is executed to avoid the risk of resonance. The rotational speed control method and device of the wind power generator set of the present invention can improve the reliability and power generation of the wind power generator set.

An intelligent drawing management system, the system includes a monitoring module, a feeding control module, a draft control module, an output control module and a remote management center, the monitoring module, a feeding control module, a draft control module, an output control The modules are respectively connected with the remote management center, and the remote management center calculates the cotton feeding, drafting and cotton conveying control parameters according to the monitoring data, and sends them to the cotton feeding control module, drafting control module and cotton conveying control module respectively. Carry out control processing, monitor the quality of sliver in real time, adjust the drafting speed in real time, realize the optimal adjustment and control of drafting speed and sliver leveling rate, thus significantly improve the leveling rate of output sliver.

The embodiment of the present invention provides a command processing method, device and system. The method includes: receiving multiple voice commands sent by the voice analysis server, and the multiple voice commands are after the voice analysis server analyzes the source voice commands from different voice control devices. Generated; respectively judge whether any two voice commands in the multiple voice commands are similar commands, and the similar commands are voice commands corresponding to the source voice commands obtained by different voice control devices collecting the same voice information; when multiple voice commands exist When the two voice commands are similar commands, one of the two similar voice commands is discarded. The embodiment of the present invention also provides an instruction processing device and system. This embodiment eliminates control errors caused by repeated execution of commands.

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.

The invention discloses a distributed DC microgrid control method. The distributed DC microgrid control method comprises the steps of: obtaining, according to a power state variable of each power source and all power sources communicating with the power source, the power distribution and regulation and correction amount of the power source through error correction; based on the correction amount,correcting a reference voltage to obtain a voltage expected value; based on a voltage expected value and an output voltage, performing error correction to obtain the average voltage regulation and correction amount of the power source; based on the correction amount, correcting the reference voltage to obtain a voltage instruction value; and based on the voltage instruction value of each power source, adopting the droop control to obtain the cut-off control signal of each switch tube in the DC microgrid. The power distribution regulation and correction amount and the average voltage regulationand correction amount are sneaked into the correction of the reference voltage one by one to eliminate the inherent voltage and power distribution deviation of the primary droop control to achieve the power and voltage control of the DC microgrid so as to reduce the communication amount required by the operation of the distributed controller while maintaining the control performance and reduce the communication burden.

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.

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.