32results about How to "Slow time lag" patented technology

The invention provides a parallel-air inlet type rear duct ejector in a variable cycle engine adjustable mechanism. The parallel-air inlet type rear duct ejector comprises an actuator cylinder, a link arm, a rotating shaft, a sleeve, a bearing, a bearing pedestal, an elastic collar, a connecting rod, an inner engine case, an outer engine case, a valve body, a sliding strip, a friction block and a friction block installation platform. According to the parallel-air inlet type rear duct ejector in the variable cycle engine adjustable mechanism, the actuator cylinder is used for carrying out driving, so that the outlet area of an engine outer duct is continuously adjustable, the structure is simple, the number of parts is small, the weight is low, and the parallel-air inlet type rear duct ejector is higher in stability and reliability compared with the design scheme of an existing variable cycle engine rear duct ejector.

The invention discloses a breathing machine. The breathing machine comprises an air breathing pipe, an expiring pipe and an expectoration pipe, wherein the air breathing pipe is provided with a turbofan, an air-breathing-and-expectoration two-position and four-way switching valve and a buffering tank; the expiring pipe is provided with an expiring valve, and the expiring valve is controlled in the mode that a two-position and three-way valve receives compressed gas from the buffering tank; the expectoration pipe is provided with a shutter valve, the air-breathing-and-expectoration two-position and four-way switching valve and the turbofan, wherein the expiring pipe and the expectoration pipe share the air-breathing-and-expectoration two-position and four-way switching valve and the turbofan. The breathing machine also comprises a central processing unit, and cooperatively controls all the parts of the breathing machine according to data detected by a sensor in the breathing machine. The breathing machine allows an expiring machine to be capable of serving as a module to be embedded into the breathing machine, and the breathing machine has the higher accuracy, responsiveness and safety. As the breathing machine is controlled by the same central processing unit, breathing work and expectoration work of the breathing machine reach true synchronization. The air breathing pipe and the expectoration pipe locally share a pneumatic circuit, and the structure of the breathing machine is simpler and more compact.

The invention provides a system and a method for detecting microorganism metabolite. The method comprises the following steps of firstly, designing a mobile testing end to collect testing results of a microorganism metabolite sample and a microorganism metabolite antibody testing liquid, and measuring the temperature, relative humidity and air pressure; sending the testing results, temperature, relative humidity and air pressure information to a data terminal; enabling the data terminal to compare the received information and the detection and experiment results under different air temperatures, different environment relative humidifies and different air pressure conditions in the pre-experiment, so as to obtain the analyzing result of the organism metabolite; sending the analyzing result to the mobile testing end. The method has the advantages that the problems of performing under the laboratory condition, lagging of detection result time, and low detection efficiency in the existing microorganism metabolite product detection technique are solved; the purposes of simplifying the detection method, improving portability of detection equipment, and improving detection accuracy are reached.

The invention discloses a method for suppressing ship wake flow disturbance by a shipboard aircraft based on direct lift control. The method specifically comprises the steps of 1 establishing a longitudinal motion nonlinear model of the shipboard aircraft; 2 designing a second-order h-gamma cascade active disturbance rejection controller for the nonlinear model form in the step 1, respectively observing a height state variable and a glide angle state variable by adopting an extended state observer, and forming state error feedback and disturbance compensation to obtain GL (delta); 3 designinga second-order theta-q cascade active disturbance rejection controller for the nonlinear model form in the step 1, respectively observing an attitude angle state variable and an angular velocity statevariable by adopting an extended state observer, and forming state error feedback and disturbance compensation to obtain Cm (delta); and according to the CL (delta) and the Cm (delta), performing control allocation by using a weighted pseudo-inverse method to obtain an actual rudder offset. According to the invention, the response speed of the shipboard aircraft control system is accelerated, andthe control precision and the anti-interference capability of the shipboard aircraft are effectively improved.

After the aluminum alloy billet obtained by continuous casting of the aluminum alloy melt into a rod shape is cut into a predetermined length by a cutting device (13), when the cut aluminum alloy billet is given an identification mark and loaded into a product transport container, the aluminum alloy The casting conditions, inspection results and identification marks of the alloy billet are stored in the storage unit (283) of the production management device (28), thereby achieving further quality stabilization and operation stabilization of the aluminum alloy billet used as a processing material .

The invention provides a detection method and system for leakage current of a heat exchanger. The detection method comprises the steps of collecting process data of a plurality of sample sets of the heat exchanger, calculating a total heat transfer coefficient through an energy-balance equation with the process data as an input condition, calculating scaling heat resistance through a total heat transfer coefficient equation according to the total heat transfer coefficient, carrying out noise elimination processing on the scaling heat resistance, generating scaling heat resistance after noise elimination, calculating the mean value and variance of the scaling heat resistance after noise elimination according to the scaling heat resistance after noise elimination, and judging whether the heat exchanger leaks or not according to the mean value and the variance. Compared with the prior heat exchange leakage current diagnostic technology, the detection method is high in calculation real-time performance and short in time delay, and is not affected by operation conditions of other devices except for the heat exchanger; the wavelet transform theory is adopted to process field data on line, influence on diagnosis results from noise is weakened, calculation accuracy is improved, implementation is facilitated, and the total cost is low.

The invention provides an in-orbit high-precision real-time positioning method based on optical images. The in-orbit high-precision real-time positioning method comprises the steps that: relevant parameters in a strict geometric imaging model are classified and equalized, and the strict geometric imaging model is equivalent to an on-satellite geometric positioning model; parameters of the on-satellite geometric positioning model are corrected by utilizing a control point of a ground calibration field; and the corrected parameters are registered to a satellite. Since the traditional strict geometric imaging model is subjected to board division and optimization, the strict geometric imaging model is equivalent to the on-satellite geometric positioning model, the on-satellite geometric positioning model can adapt to the situation of limited on-satellite resources, the time hysteresis of positioning is reduced through real-time positioning treatment by means of the on-satellite geometric positioning model, the pressure on a digital transmission system by massive data downward-transfer is reduced, and finally errors of the system are reduced by adopting a parameter correction method based on satellite-ground collaboration, thereby improving the positioning precision.

The invention provides a parallel-air inlet type rear duct ejector in a variable cycle engine adjustable mechanism. The parallel-air inlet type rear duct ejector comprises an actuator cylinder, a link arm, a rotating shaft, a sleeve, a bearing, a bearing pedestal, an elastic collar, a connecting rod, an inner engine case, an outer engine case, a valve body, a sliding strip, a friction block and a friction block installation platform. According to the parallel-air inlet type rear duct ejector in the variable cycle engine adjustable mechanism, the actuator cylinder is used for carrying out driving, so that the outlet area of an engine outer duct is continuously adjustable, the structure is simple, the number of parts is small, the weight is low, and the parallel-air inlet type rear duct ejector is higher in stability and reliability compared with the design scheme of an existing variable cycle engine rear duct ejector.

The invention discloses a WIFI indoor positioning method and system for large-scale and complex scenes. The method includes: constructing a location fingerprint library of the location area based on reference point information of the location area; performing cluster analysis on the location fingerprint library to generate a location Multiple initial clustering results of fingerprints; based on the initial clustering results, construct the weighted similarity matrix of the location fingerprint library, and based on the weighted similarity matrix, divide the location fingerprint data in the location fingerprint library into multiple grids; The obtained RSSI data is matched with each grid center of the location fingerprint library, and the target to be positioned is divided into the grid with the highest matching degree; in the grid with the highest matching degree, the positioning result of the target is obtained by using the preset matching algorithm. The invention can effectively suppress the influence of noise and singular value on the positioning result, thereby ensuring the reliability and effectiveness of the indoor positioning result, and significantly improving the generation efficiency of the positioning result by reducing the calculation amount in the online matching stage.

The invention discloses a vehicle active collision avoidance system based on VII support, comprising a short-distance wireless communication terminal, a road side base station and a traffic information service center, wherein, the short-distance wireless communication terminal is installed in a vehicle; the vehicle-mounted short-distance wireless communication terminals of the vehicles in local road sections form a wireless communication local area network; a road side base is arranged at a road side, various sensors arranged on the vehicle obtains the data information through uploading and collecting by CAN buses; the short-distance wireless communication terminal is provided with a danger warning information publisher; when the dangerous condition such as potential rear-end collision and the like exists, the danger warning information publisher is activated; the danger warning information is published in a broadcast manner through the short-distance wireless communication; after theshort-distance wireless communication terminals on other vehicles receive the danger warning information, a central controller safety status judgment module analyzes the critical following distance required in preventing rear-end collision with abnormal running vehicles in a current running state. The vehicle active collision avoidance system of the invention can effectively reduce time delay andimprove reliability.

The invention discloses a method for suppressing wake disturbance of a carrier aircraft based on direct lift control. The method is specifically as follows: step 1, establishing a nonlinear model of longitudinal motion of the carrier aircraft; step 2, aiming at the nonlinear model in step 1 Form, design a second-order h-γ cascade active disturbance rejection controller, use the extended state observer to observe the state variable of height and the state variable of glide angle respectively, and form the state error feedback and disturbance compensation, and get G L (δ); Step 3. For the nonlinear model form in step 1, design a second-order θ-q cascade active disturbance rejection controller, and use the extended state observer to observe the attitude angle state variable and the angular velocity state variable respectively, and form a state error feedback and disturbance compensation, to obtain C m (δ); according to C L (δ) and C m (δ), the actual rudder deflection is obtained by using the weighted pseudo-inverse method for control assignment. The invention accelerates the response speed of the control system of the carrier-based aircraft, and effectively improves the control precision and anti-interference ability of the carrier-based aircraft.

The invention provides a respirator. The respirator comprises an inspiration pipeline, an expiration pipeline, an expectoration pipeline and a central processing unit; the inspiration pipeline is provided with a positive pressure source for supplying positive pressure to a patient, a buffer tank and a two-position two-way balloon valve, and the two-position two-way balloon valve is subjected to on-off switching control through an air pump and a first two-position three-way valve; the expiration pipeline is provided with an expiration valve which is controlled though a second two-position three-way valve by receiving compressed air which is from the buffer tank and has preset constant pressure; the expectoration pipeline is provided with a negative pressure source for supplying negative pressure to the patient and a fast valve which is connected between the negative pressure source and the patient in series; the central processing unit conducts cooperative control over all the parts of the respirator according to data detected by a sensor in the respirator. According to the respirator, an expectoration machine can be embedded into the respirator by serving as a module, and higher precision, responsibility and safety are achieved; by adopting the same central processing unit, the system structure is simplified, and respiration and expectoration work of the respirator can achieve real synchronousness.

The invention discloses a VC-based ADO technology high-speed parallel communication system and a working method thereof, which is characterized by comprising a synchronous sampling and filter circuit, a direct current voltage stabilizing circuit, a host computer and a parallel control port circuit, a data selection buffer, and a pulse signal clock generator; the working method comprises: 1. inputting an analog signal and converting the analog signal into a digital signal; 2. transmitting data to a parallel control port; and 3. the host computer receiving and storing the data; the system and method of the invention has the advantages of realizing the high-speed real-time parallel communication transmission of data, improving the speed and precision of the control, leading each module to beprovided with good regulation performance and reliability, enhancing stability in a transmission process, and guaranteeing the system running safely; and the circuit of the system has simple design, good practicability, stable circuit working and high reliability; and integrates low power consumption with excellent dynamic performance, thus being a desirable selection for portable applications with sensitive power consumption, such as, ultrasonic and medical imaging, portable instrument, and low power consumption data acquisition system, etc.

The invention provides a software updating instruction distributing method, a communication server and a terminal device. The method comprises the following steps that long connection with at least one terminal device is established; a message including software version information is sent to the terminal device, so that the terminal device judges whether software updating is needed or not according to the software version information, and if so, software updating data is obtained from an updating server in a multicast communication mode. The communication server comprises an establishing unit and a sending unit, wherein the establishing unit is used for establishing long connection with at least one terminal device, the sending unit is used for sending the message including the software version information, so that the terminal device judges whether software updating is needed or not according to the software version information, and if so, software updating data is obtained from the updating server in the multicast communication mode. The problems that the software updating instruction distributing delay is great, and in addition, a large number of resources of a control center need to be occupied are solved.