57 results about "Closed loop design" patented technology

A method of designing an integrated circuit is provided in which the design layout is optimized using a process model until the design constraints are satisfied by the image contours simulated by the process model. The process model used in the design phase need not be as accurate as the lithographic model used in preparing the lithographic mask layout during data prep. The resulting image contours are then included with the modified, optimized design layout to the data prep process, in which the mask layout is optimized using the lithographic process model, for example, including RET and OPC. The mask layout optimization matches the images simulated by the lithographic process model with the image contours generated during the design phase, which ensures that the design and manufacturability constraints specified by the designer are satisfied by the optimized mask layout.

The tobacco material conveying system includes one main line track, branch line tracks and track shifting units. The main line track in annular structure and each of the branch line tracks constitute one closed loop configuration, and there is a track shifting unit in each of the nodes between the main line track and each of the branch line tracks. The main line track is connected to the maintenance station, and guide bogie may be controlled to pass into and out of the main line track and reach any of branch line track stations. The present invention in closed loop design has convenient increase of transportation site, easy expansion, fast conveying speed, high efficiency and other advantages.

An in-ground geothermal heat pump (GHP) closed loop design program is disclosed for designing, analyzing, and simulating a detailed model and analysis of a proposed buildings in-ground geothermal heat pump system, including borehole length, number of boreholes, heat pump capacity, grid layout, total electric operating costs, efficiency ratios, and hybrid designs, among others. In one aspect of the disclosure described herein, the GHP design program can reliably and efficiently predict the fluctuations of the GHP equipment performance in very small increments which enables the determination of energy consumption and demand information on a specific and unique hourly schedule basis for a proposed building design, including incorporating thermal load data for each individual zone of the building. More specifically, the small increment method here can be used to eliminate overly broad approximations by evaluating GHP performance that is specific to building dynamics, constants, and variables for all of the building individual zones and the building's hourly operating schedule, thereby providing an efficient, reliable, simple, and effective geothermal heat pump design and simulation model.

A drilling fluid homogenizer and method of homogenizing drilling fluid which produce a non-clogging homogenized drilling fluid at a high throughput, in an open-loop process. The non-clogging homogenized drilling fluid is capable of being created at high rate so that the non-clogging homogenized drilling fluid is available on demand to eliminate halting of drilling operations. The drilling fluid homogenizer is coupled in series with the closed-loop designed drilling fluid system and is adapted to homogenize water-based drilling fluid and other drilling fluid types, such as, synthetic drilling fluid during drilling operations on demand.

The utility model discloses a nonlinear predictive control method of a trough reactor based on a multi-kernel support vector machine (SVM), belonging to the field of industrial automatic control, which mainly comprises the modeling based on the multi-kernel support vector machine and the closed loop design of the predictive control; wherein, the multi-kernel support vector machine comprises a dynamic part based on a linear kernel support vector machine and a static part based on a spline kernel support vector machine which are connected in series; according to the static and dynamic input and output data of the trough reactor, the model of multi-kernel support vector machine is created to change the future reference path of the temperature of the trough reactor by the inverse based on the spline kernel support vector machine, to change the nonlinear predictive control into the linear predictive control which aims at the linear kernel support vector machine model and to give the optimal control law analytical solution with unified form of multi-step predictive control according to predictive control mechanism; the optimal control law analytical solution is acted on the reactor to raise the temperature to the set value and to complete the control circulation.

The invention discloses a power direction judgment based bidirectional blocking protection method for a distributing line. According to the power direction judgment based bidirectional blocking protection method for the distributing line, information interchange between FTUs (Feeder Terminal Unit) is achieved through the network communication technology, exchange of action information between superior and subordinate protection is achieved, interlocking is achieved, short-circuit fault bidirectional blocking type protection is achieved, action time delay caused by multilevel cooperation is effectively shortened, quick fault isolation is achieved, and fault hazards are reduced. The current situation that most generator circuit breakers do not participate in blocking in site is fully taken into consideration, the fault can be accurately positioned and isolated during power failure transferring and network topological changes, a primary station is not required to participate in the integral protection process, and the workload of the primary station is reduced. The power direction judgment based bidirectional blocking protection method for the distributing line is particularly suitable for line protection of a closed-loop designed and open-loop operated power distribution network with the primary station being not involved in controlling and the generator circuit breaker being not involved in blocking.

The invention relates to the technical field of pod rotation devices, in particular to a pod rotation hydraulic drive system. The pod rotation hydraulic drive system includes a bi-directional variablepump, a hydraulic motor, a first one-way valve, a second one-way valve, a first overflow valve, a second overflow valve, a third overflow valve, a fourth overflow valve, a two-position four-way solenoid valve, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a two-position two-way solenoid valve, a washing valve, a counterbalance valve, a cooler, and an oil pump.A closed loop design is adopted, energy loss due to an opened loop is avoided, the efficiency is improved, and the stability is enhanced. The first hydraulic control one-way valve and the second hydraulic control one-way valve can achieve self-locking of the hydraulic motor so as to allow the hydraulic motor to be in a stable state as static; and the two-position two-way solenoid valve can achieve free slide rotation of the hydraulic motor, energy can be saved, and the working efficiency is improved.

The invention discloses a gas flow regulation control device based on an embedded system. The gas flow regulation control device comprises an ARM controller, a stepping motor driver, a CAN driver and a stepping motor angle detection feedback system. The gas flow regulation control device based on the embedded system is characterized in that the ARM controller is connected with the stepping motor driver, and the ARM controller is connected with a solid rocket ramjet control system through the CAN driver. The ARM controller comprises a main program module, an interruption control module, a control table module, a membership function module, a fuzzy PID module and a PID module, and can be fixedly arranged inside a gas flow regulator of a solid rocket ramjet for controlling a disc of the gas flow regulator of the solid rocket ramjet to rotate, the throat area of an engine jet pipe is changed to regulate the air-fuel ratio, the energy of propellants is fully utilized, and thus the optimum working performance is achieved by the solid rocket ramjet. According to the gas flow regulation control device based on the embedded system, a modular structure is adopted, the closed loop design is achieved, high control precision can be guaranteed, the structure is compact, assembling and disassembling are convenient, reliability is high, and environmental adaptation is strong.

Methods and production control systems are presented in which design of experiments are performed in situ and produce model parameter estimates that relate actuator set points to any number of response variables, and the model is periodically updated based on these designed experiments and used as the basis for determining actuator set points.

The invention relates to the technical field of supersonic wind tunnel propeller power measurement test verification. The invention particularly relates to a supersonic wind tunnel propeller numericalmodel measurement and verification system and a control method thereof. A torque and rotating speed integrated sensor and a box type six-component balance are combined to measure performance parameters of a servo motor and a propeller, parameters such as propeller tension, lift force, torque, rotating speed (a servo motor and a propeller) and vibration are obtained in real time and sent into a real-time analysis system, a closed-loop design verification model of the torque, the bending moment of the balance, the rotating speed of the propeller and the rotating speed of the motor is formed, and the interference influence of errors generated by a single measurement system on a supersonic wind tunnel propeller test is avoided. A vibration sensor is used for monitoring and measuring the system state in real time, dangerous state points in the test process are avoided, the whole system is placed in a high-altitude environment simulation cabin, the whole structure is vertically installed onthe windward side of the center of a wind tunnel test section, and the system is applied to tests of propellers of different specifications in a supersonic wind tunnel in the high-altitude environment.

An in-ground geothermal heat pump (GHP) closed loop design program is disclosed for designing, analyzing, and simulating a detailed model and analysis of a building's in-ground geothermal heat pump system, including borehole length, number of boreholes, heat pump capacity, grid layout, total electric operating costs, efficiency ratios, and hybrid designs, among others. In one aspect of the disclosure described herein, the GHP design program can reliably and efficiently predict the fluctuations of the GHP equipment performance in very small increments which enable the determination of energy consumption and demand information on a specific and unique hourly schedule basis for the building design, including incorporating thermal load data for each individual zone of the building. More specifically, the small increment method here can be used to eliminate overly broad approximations by evaluating GHP performance that is specific to building dynamics, constants, and variables for all of the building individual zones and the building's hourly operating schedule, thereby providing an efficient, reliable, simple, and effective geothermal heat pump design and simulation model.

The present invention discloses an antenna and a wireless communication device. The antenna comprises a first radiation body and a second radiation body. The second radiation body is a closed-loop metal frame without slots. The first radiation body is a USB interface. A metal shell of the USB interface is connected with metal of the second radiation body. The first radiation body and the USB interface are subjected to integrated design, the second radiation body is designed as the closed-loop metal frame without slots, and the USB interface is connected with the metal of the second radiation body. According to the antenna and the wireless communication device, the first radiation body of the antenna and the USB of the wireless communication device are subjected to integrated design, the effect of the USB interface to antenna receiving and sending signals is eliminated, and on that basis, the antenna is subjected to metal frame closed-loop design, so that production cost is greatly reduced.

The invention discloses a method and device suitable for measuring the specific heat capacity at constant pressure of dissolved gas flow. The device comprises a liquid container, a preheater, a mixingcavity, a calorimeter, a condenser and a gas sample bottle, wherein the liquid container, the preheater and the mixing cavity sequentially communicate one another, and the mixing cavity communicateswith the calorimeter and the gas sample bottle; the calorimeter communicates with the condenser to the liquid container through a pipeline to form a circulation loop; the preheater, the mixing cavityand the calorimeter are all arranged in a thermostatic bath with circulating fan blades; and the calorimeter is connected with a data acquisition system and a direct-current power supply. By adoptingthe closed loop design, the constant components of the gas-dissolved liquid in the system are realized by using the mixing cavity and the circulating pump, so that the effective and accurate measurement of the specific heat capacity at constant pressure of the fluid is realized.

The invention provides a robust controller design method for ensuring stable operation of DC bus voltage. The method comprises the following steps: S1, constructing a DC side outlet voltage small signal model of a DC power distribution network voltage source converter; s2, performing unstructured uncertainty modeling on a current control link in the DC side outlet voltage small signal model; s3, performing parameterized uncertainty modeling on a voltage control link in the DC side outlet voltage small signal model; s4, calculating a converter robust controller K (S) by using a two-degree-of-freedom closed-loop design structure; s5, determining a robust control design index according to a robust control mu-comprehensive theory; and S6, inputting the robust control design indexes in the stepS5 into Matlab software, and completing robust controller design by utilizing a toolbox of Matlab. Through uncertain control simulation of the DC bus voltage in the DC distribution network, the controller designed by using the analysis method provided by the invention has good robust stability and robust performance.

The invention discloses a double-display micrometer gauge and a micrometer gauge pointer display control method. The double-display micrometer gauge comprises a sensor module, an A/D conversion chip module, a microprocessor control module, a liquid crystal display module and a pointer display module. The pointer display module comprises a pointer drive module, an angle sensor module and a pointer module. The double-display micrometer gauge can convert a 4-20 mA electrical signal output by a sensor into pointer display and liquid crystal display through an A/D conversion chip. Meanwhile, an angle sensor and the microprocessor control module and the pointer drive module form closed loop design, the position of a pointer is fed back to a microprocessor in real time through the angle sensor, and the correct indicating position of the pointer is adjusted through the pointer drive module to prevent pointer non-synchronization or pointer notoscale and the like. The double-display micrometer gauge and the micrometer gauge pointer display control method have the advantages that precise measuring and flexible operation are guaranteed due to digital display, precise display under the critical state is guaranteed through analog display, and the double-display micrometer gauge is easy to read.

The invention discloses a full-intelligent efficient water-saving cleaning system for an air cooling island of a power plant. The full-intelligent efficient water-saving cleaning system comprises an operation ladder, a spray-wash cleaning frame, a high-pressure cleaning mechanism, a cavitation cleaning mechanism, a flexible temperature measuring mechanism, a real-time monitoring mechanism and a control mechanism. The system is optimized and reformed on the basis of an original washing system, a more reliable mechanical transmission technology is adopted, the driving capability of a system moving mechanism is enhanced, automatic and manual double closed-loop control is adopted, the closed-loop design concept and the control concept of a rectangular coordinate robot are effectively shifted to ladder operation and spray cleaning frame operation mechanisms of the air cooling island, and the cavitation bubble technology of an air condenser based on the ultrasonic principle is truly appliedto cleaning fins of the air cooling island; a crucial process guiding effect is played on water saving and on solving the pollution flashover of a main transformer and reducing the back pressure; andvarious functions are integrated, so that the washing efficiency and the effect are improved, the heat exchange effect of a radiator is enhanced, the efficiency of a generator set is improved, and thecoal consumption is reduced.

The invention discloses a perception decision model upgrading method and system based on automatic driving. The method comprises the following steps of: acquiring to-be-tested road scene information; performing failure analysis on the to-be-tested road scene information based on a preset perception decision model to obtain vehicle perception decision information; determining perception decision failure data according to the vehicle perception decision information; and upgrading the preset perception decision model according to the perception decision failure data. Compared with the prior art in which model training needs to be performed on different mass-produced vehicle types in a targeted manner, the method has the advantages that through closed-loop design of the data of an automatic driving system, model upgrading can be performed on the preset perception decision model according to the perception decision failure data corresponding to the vehicle perception decision information, and therefore, the reliability of functions and algorithms of mass-produced vehicle types is improved.