232results about How to "Precise and stable control" patented technology

An improved system and method for controlling ozone concentration in connection with a multi-chamber tool. The system and method involve a first and a second concentration controller in combination with an ozone generator. The first concentration controller detects an EVENT (i.e., one of the chambers in the multi-chamber tool coming on-line or off-line) and in response provides a power instruction to the ozone generator in accordance with a predictive control algorithm. The first concentration controller has a fast (i.e, about 1 second) response time. The second concentration controller is masked from the ozone generator during the EVENT, but otherwise controls the generator after an interval of time has lapsed after the EVENT. The second concentration controller has a slower response time than the first concentration controller, however the second concentration controller provides the system with long-term stability and can be used to provide updated data to the predictive control algorithm.

The invention provides a combination automatic control method with a single-joint manipulator under mixed suspension microgravity environments. The combination automatic control method comprises the following steps of 1, enabling a combination to be equivalent to an underwater robot, and establishing a kinematics equation and a dynamics equation; 2, approximating the dynamics equation of the combination by a radial basis function neural network, so as to obtain control force and control torque corresponding to the radial basis function neural network; 3, using a sliding mode control method, so as to obtain control force and control torque corresponding to sliding model control; 4, synthesizing the control force and control torque corresponding to the neural network and the control force and control torque obtained by the sliding model control method, and distributing thrust, so as to obtain a general vector which consists of thrust and joint torque of each propeller; approximating the thrust deviation of the corresponding thruster through the radial basis function neural network, so as to obtain the estimation value of the thrust deviation; 5, combining the results obtained in step 2, step 3 and step 4, obtaining the general vector consisting of the thrust and the joint torque of the corresponding propeller, and further obtaining the thrust and the joint torque of the corresponding propeller, so as to realize the automatic control.

The invention relates to a solid fermentation bioreactor. The reactor comprises a reaction casing , and a porous material layer separator plate (5) is arranged in the reaction casing to divide the reaction casing into an upper fermentation chamber (1) and a lower layer air chamber (3); the reactor also comprises a fermentation control system for controlling a stirring unit, a temperature control unit, a humidity control unit, an air feed control unit and a fermentation tail gas detection and processing unit, so as to realize real time monitoring and control on temperature, humidity, ventilation, stirring and tail gas. The invention realizes totally enclosing on-line fermentation and prevents extraneous pollutants from entering; the tail gas detection system carries out real time on-line monitoring on fermentation gas, and tail gas is treated by tail gas recovery equipment to protect the environment, thereby realizing coupling operation of temperature, humidity, ventilation, stirring and tail gas control system and ensuring necessary essential factors for microbe growth.

The invention provides a dual-purpose fertilizing device capable of accurately preparing a fertilizer and irrigating clear water and an EC+PH adjusting method thereof. According to the device, a water feeding system and a fertilizer feeding system are arranged in a fertilizer mixing tank; a backflow pipeline is arranged on the fertilizer mixing tank and a fertilizer feeding pipeline; a fertilizer concentration acquisition device and a pH acquisition device are arranged on the backflow pipeline, and are connected with a fertilizer preparation control system respectively through data lines; and the fertilizer preparation control system is electrically connected with a fertilizer suction electromagnetic valve and a fertilizing pump. Key parameters of an algorithm and a control way are adjusted in real time according to a parameter change situation on the basis of a closed-loop control principle and PID (Proportion Integration Differentiation) adjustment and in combination with the object features of a fertilizer liquid reaction process, in particular the non-linear process features of PH parameter change, and accurate and stable control of EC and PH of a fertilizer liquid is realized by using a most proper control strategy and corresponding regulation and control parameters under different working conditions of a fertilizer preparation reaction process.

The invention discloses an agricultural machinery roll angle test method based on double antenna GNSS (global navigation satellite system) receiver/gyroscope information fusion. The white noise of the roll angle measured by a double antenna GNSS receiver is great, and the roll angle cannot be easily and directly used for agricultural machinery posture correction. The gyroscope output data is stable; the short-time stability is high, but the long-period precision is poor. A Kalman filter is used for performing fusion processing on the roll angle obtained by the double antenna GNSS receiver and the roll angular velocity obtained by a gyroscope; the precise estimation of the agricultural machinery roll angle is obtained. The method has the advantages that more continuous and stable agricultural machinery roll angle data can be formed, so that the tilt correction of the agricultural machinery is more precise.

The invention discloses a natural gas hydrate saturation and sediment permeability synchronous measurement device. The device comprises an inverted reaction kettle, wherein a vacuum pumping system, a confining pressure control system and a prepared sample circulation system are connected to the bottom end of the reaction kettle, a permeability transient measurement system, a hydrate saturation measurement system and a data collection system are connected to the top end of the reaction kettle and connected with a computer, and the reaction kettle, the prepared sample circulation system and the permeability transient measurement system are all arranged in a temperature control system. The invention also discloses a natural gas hydrate saturation and sediment permeability synchronous measurement method. Through the device and method, synchronous transient measurement of the hydrate saturation and sediment permeability in the synthesis and decomposition process can be realized, and a reliable experimental platform is provided for research on the change law of reservoir permeability in the hydrate reservoir-forming and exploiting process.

The invention discloses a shortcut method of nerve network decoupling based on the adaptive control multiple-variable system in the complex system intelligent modeling and decoupling control technique domain, which is characterized by the following: adapting on-line identification and decoupling of nerve network; guiding the other two-phase control signal into the input end of nerve network identifier as two signal reference and identification when certain one phase of the three-phase electrode system is on-line identifying; decoupling and controlling the three-phase electrode.

The invention provides a precise propelling type electronic anesthesia machine which is characterized by being provided with an anesthetic propelling unit, a pressure and flow testing unit and a control unit. An anesthetic mixing unit is provided with a heating constant temperature unit. The anesthetic propelling unit is a precise injection unit and comprises an injection pump, a propelling controller and a stepping motor with a reduction gearbox. The pressure and flow testing unit comprises a pressure sensor and a flow sensor. The control unit comprises a signal processing module, a motion execution drive module and a single-chip microcomputer. The heating constant temperature unit is a PID intelligent temperature controller provided with a temperature sensor. According to the precise propelling type electronic anesthesia machine, anesthetic is directly injected into an anesthetic mixing and volatilizing cavity, heated in real time and controlled accurately, and therefore control of the vaporizing and volatilizing process of the anesthetic is economical, precise, accurate and stable. A volatilization core does not need to be adopted, requirements for the initial amount of the anesthetic can be avoided, the range of the applicable anesthetic is wide, generality is strong, a user can switch different kinds of the anesthetic conveniently, and convenience is brought to application in the animal experiment field.

The invention discloses a quenching and tempering device for cooling high-temperature fume, comprising a two-fluid electrical appliance controller, a water path and an air path arranged between a high-temperature fume inlet and a high-temperature fume outlet. The device of the invention is characterized in that a low pressure pump is arranged in the air path, a low pressure air path is combined into a water pipeline before a spray gun, two transducers are arranged to adjust the pressure and flow of a water pump and an air pump, the nozzle bore diameter is phi 6-7mm, and the spray particle diameter is smaller than 300 micrometers; a temperature sensor is respectively arranged at a wetting tower inlet and the fume outlet, and the outlet temperature is controller to 130-150 DEG C; an operation program is controlled to calculate the temperature difference of the fume inlet temperature and the fume outlet temperature, tower volume and spray fall height; two transducers are used for controlling the water pump and the air pump to automatically adjust operation power when low air pressure is 0.4-0.6MPa, and air flow quantity and water flow quantity are 5-25T/H. the particle diameter of sprayed water spray is small and even, which can better realize precise control to temperature and reduces atomization particle residence time and wet bottom danger. The dust removal device designed by the invention increases fume density and volume, lowers speed and improves dust removal function. In particular, the spray granularity is small, which can obviously control temperature and humidity, lower discharge Dioxin and furan mixed in dust and reduce environment protection cost.

A vehicle lane keeping control system calculates a feedforward control amount on the basis of a vehicle traveling path, calculates a first positional deviation amount between a vehicle and a target course at a first forward attention point when the vehicle travels in a straight line to the first forward attention point if a steering torque exceeds a threshold value, calculates a first lateral position feedback control amount, calculates an amount of deviation between an estimated vehicle traveling path and the target course at a second forward attention point remote from the first forward attention point if the first lateral position feedback control amount is lower than the threshold value, calculates a second lateral position feedback control amount, and calculates an electric motor current value by using at least the feedforward control amount and one of the first and second lateral position feedback amounts.

The invention discloses a feed crushing and classified collection device. A feeding mechanism comprises a feeding channel. One end of the feeding channel is connected with a feeding port, and the other end of the feeding channel is horizontally provided with a feeding baffle. One end of the feeding baffle is hinged to the side wall of a box body, and the other end of the feeding baffle is erected on a primary regulating wheel. A crushing mechanism comprises a crushing box. The crushing box is connected to the eccentric position of a rotary table through connection rods, the axis of the rotary table is rotationally connected to a support plate through a rotating shaft, a crushing drive motor drives a crushing frame inside the crushing box, and the bottom of the crushing box is provided with primary sieve holes. A sieving mechanism comprises a primary sieve net and a secondary sieve net which are horizontally arranged, one end of the primary sieve net is hinged to the side wall of a box body, the other end of the primary sieve net is arranged on a secondary regulating wheel, one end of the secondary sieve net is hinged to the side wall of the box body, the other end of the secondary sieve net is erected on a tertiary regulating wheel, a primary box door is arranged at the hinged position of the primary sieve net, a secondary box door is arranged at the hinged position of the secondary sieve net, the crushing effect is good, and the classification sieving function is achieved.

The invention discloses a storage battery protective circuit. An existing storage battery only has charging protection and lacks discharging protection in a working process, and excessive discharging damages the capacity and the service life of the storage battery. The storage battery protective circuit comprises a charging source, a storage battery and a charging protection circuit. The charging source is connected with the storage battery through the charging protection circuit, and the storage battery is connected with a load through a discharging protection circuit. The charging source is connected with the storage battery through the charging protection circuit, the storage battery is connected with the load through the discharging protection circuit, excessive charging is prevented in a charging process, excessive discharging is prevented in a discharging process, the storage battery is guaranteed to be used normally and the capacity and the service life of the storage battery are protected.

A control system that constantly and accurately controls a control variable so that it remains within an allowable range is provided. The control system in accordance with the present invention estimates a steady-state deviation d in a controlled object as a steady-state deviation estimation value d′ on the basis of a control variable y and a final desired value y₂. A control variable y in a controlled object based on the initial desired value y₁ is estimated as the primary estimation value y₁′ on the basis of at least the initial desired value y₁ and the steady-state deviation estimation value d′. If a primary estimation value y₁′ is within an allowable range, then a final desired value y₂ agreeing with an initial desired value y₁ is determined, while, if the primary estimation value y₁′ is out of the allowable range, then the final desired value y₂ is determined on the basis of at least a boundary value of the allowable range. A manipulation variable x is determined on the basis of the final desired value y₂.

The invention discloses a method for setting the width of a ferrite stainless steel slab during continuous casting production. The method comprises the following steps of: according to the steel grades of ferrite stainless steel, calculating the shrinking percentage of a slab in the steel grade in the width direction when the temperature is reduced from the temperature at an outlet of a continuous casting machine crystallizer to room temperature; calculating a swelling value of the slab in the steel grade from creepage starting to creepage termination in the width direction; and according to the target width of the slab in the steel grade, adjusting the positions of copper plates on the two sides of the continuous casting machine crystallizer so as to set the width of the outlet of the crystallizer. The method accords with the performance characteristics of the ferrite steel grades. According to a control result, slabs meeting the preset product requirements can be produced and the requirements of a small error and a stable control law are met.

The invention discloses a helicopter control load system based on an actual control lever system which mainly comprises a human-sensing loading device, a matching rod system and a control unit and control loading system software; the system can simulate the control load system in helicopter flight training, and satisfy the static and dynamic control characteristics of a helicopter under differentflight conditions and different control modes. The invention also discloses a simulation implementation method based on actual control lever system for a helicopter control load system. Firstly, according to the structure of an actual control system, the actual control lever system is equipped; a human-sensing loading equipment is installed at a corresponding position of the control load system, and connected into the matching rod system through a connecting rocker arm, and the human-sensing loading equipment adopts the actual assembled parts; the human-sensing loading equipment, a rudder control box and a control computer are connected through aviation cables; the control load system is controlled by the control software, and the control characteristics under various flight conditions arerealized.

The invention relates to water injection well control detection equipment, in particular to an intelligent flow monitoring device of a water injection well. A data collecting module comprises a single-chip microcomputer, a flow meter and a valve control module. A GPS communication module, the flow meter and the valve control module are connected with the single-chip microcomputer respectively, and the GPS communication module and a monitoring center perform remote wireless communication. According to the structure, the flow meter is used for monitoring the flow of the oil field water injection well and transmitting real-time detection values to the single-chip microcomputer, the single-chip microcomputer controls opening of a valve through the valve control module according to parameters set in advance, remote monitoring of the oil field water injection well is realized by the utilization of connection between the monitoring center and the GPS communication module and through a GPS wireless communication network and a computer network technology, and collected data are transmitted to the monitoring center through the GPS communication module. Thus, a worker can obtain site working condition information timely and accurately without going to the site, the working state of the equipment can be judged at any time, faults can be found out timely, and losses caused by accidents are lowered.

The invention provides an air conditioner and a marine air conditioning system. According to the air conditioner of the present invention, the box body has a new air return mixing chamber and a fresh air inlet chamber, the fresh air inlet chamber communicates with the new return air mixing chamber, and also has a fresh air inlet that communicates with the fresh air inlet chamber, and the return air inlet communicates with the new air inlet chamber. The return air mixing cavity is connected; the fresh air fan is set in the fresh air inlet cavity; the fresh air intake regulating valve is set at the fresh air inlet and controls the fresh air intake; the return air intake regulating valve is set at the return air inlet and controls the return air intake The detection and control part includes an air volume detection component and a control component. The air volume detection component is arranged in the fresh air inlet cavity, and detects the fresh air intake volume of the fresh air intake cavity. It is connected with the air volume detection component, and controls the opening degrees of the fresh air intake regulating valve and the return air intake regulating valve according to the fresh air intake volume detected by the air volume detection component. The fresh air intake volume control of the air conditioner is more accurate.

The invention discloses a cyclic aeration subsurface oxygen irrigation system. The system comprises a main water delivery pipe (6), wherein, one end of the main water delivery pipe (6) is communicated with a water source, the main water delivery pipe (6) is communicated with an aeration water storage tank (1) provided with an exhaust valve (2) in parallel through a first three-way joint (7) and a second three-way joint (8), and the other end of the main water delivery pipe (6) is communicated with each water irrigation tubular billet (5) buried in soil. The cyclic aeration subsurface oxygen irrigation system is characterized in that the exterior of the aeration water storage tank (1) is connected with a venturi ejector (3) and a booster pump (4); a first water flow control valve (9) is arranged between the aeration water storage tank (1) and the three-way joint (7); a second water flow control valve (10) is arranged between the aeration water storage tank (1) and the three-way joint (8); and a third water flow control valve (11) is arranged between the three-way joint (7) and the three-way joint (8). The cyclic aeration subsurface oxygen irrigation system disclosed by the invention has the advantages of simple structure, low cost, less energy loss, cyclic aeration function and wide range of aeration ratio, and is convenient for use and management as well as maintenance and is labour-saving; and meanwhile fertilizer can be dissolved in water, and fertilizer, water and gas can be irrigated at the same time, thus utilization ratio of fertilizer can be improved, and pollution to soil and underground water can be reduced.

The invention belongs to the field of machine design and manufacturing-high grade numerical control machine tool and basic manufacturing equipment, and relates to large-scale seven-shaft linkage numerical control laying and winding integrated forming equipment. A main machine which is formed by three linear shafts and one rotating working table rotating shaft, and a laying and winding head which is driven by three rotating shafts are adopted to composite three translation movement and four rotation movement to achieve laying and winding head spatial motion track control and workpiece rotation.A conveying belt u shaft is adopted to drive winding and rewinding of a cloth belt and speed adjustment to achieve eight-shaft control seven-shaft linkage laying, and therefore automatic forming of acomposite material skin structure with all kinds of spacial special-shaped hook surfaces is achieved. The spatial motion track of the laying winding head can be directly controlled, even a workpiecewith the special-shaped hook surface can be accurately attached to the surface of the laying winding head for laying and winding, and therefore forming operation of material cutting after solidifyingand forming can be reduced and even avoided. Pollution is reduced, the cost is saved, and efficiency is improved. The automatic tow placing technology provides an equipment platform suitable for engineering application research and manufacture.

The invention discloses a zebrafish embryo heart injecting system and method based on vision servo three-dimensional rotation, and relates to the field of micro-injection. The zebrafish embryo heart injecting system comprises a stereomicroscope, a CCD camera, a supervisory computer, a triaxial mechanical hand, a rotating manipulator, a micropipet and a pump, wherein the CCD camera is located abovethe stereomicroscope, and is used for collecting images and transmitting the collected images to the supervisory computer for treatment; the supervisory computer is connected with the triaxial mechanical hand and the rotating manipulator, and is used for analyzing the real-time position and the gesture of a zebrafish embryo as well as the point position of the micropipet according to the collected images, and transmitting a control signal to the triaxial mechanical hand and the rotating manipulator to control the direction and the speed of the triaxial mechanical hand and the rotating angle of the rotating manipulator; the triaxial mechanical hand is used for clamping the corresponding micropipet to move the point of the corresponding micropipet to a target position; the rotating manipulator is used for clamping the corresponding micropipet to rotate the zebrafish embryo; and the pump is used for providing sucking force for sucking and holding the zebrafish embryo and thrust for pushing out foreign substances. The system is simple in structure, high in precision and good in stability.