43results about How to "Realize optimal control" patented technology

The invention provides a control scheme of a VAV (variable air volume) air-conditioning system. A neural network predictive control method is used for a tail end VAV-BOX and an air-conditioning unit, thus the hysteresis characteristic of a VAV system can be overcome, the control accuracy is improved, the resonance phenomena of an actuating mechanism can be greatly reduced, the energy-saving effect is improved by above 13%, and the control parameter tuning problem in the project is solved. A pressure independent cascade stage predictive control method is used for the tail end VAV-BOX, thus thecontrol accuracy can also be improved. The air-conditioning unit is provided with four control loops and can automatically select a static pressure control or total air volume control policy with adjustable setting static pressure by using an all-condition integrated control technology, thus the predictive control on a fan can be realized; the primary air volume of all the tail end VAV-BOXes can be detected and the air supply temperature can be adjusted according to the operation condition, thus the problem of too low temperature in partial air-conditioning area in the lowest fresh air operation is solved; the cascade stage predictive control method is adopted for a fresh air ratio control loop, thus the accurate control on the fresh air ratio can be realized and the energy-saving level can be further improved.

The invention discloses an optimized adjustment and control method of a passenger vehicle high-strength integral side body stamping technology. The method comprises the steps that S1, an integral sidebody is divided into a local complex difficult-to-form structure, a local sharp difficult-to-form structure, a peripheral arc-shaped flanging structure and an inner hole arc-shaped flanging structure; S2, the blank holder face of the local complex difficult-to-form structure is divided into three blank pressing regions to be subjected to sectioning blank pressing operation, and oil mist lubrication is adopted by a female and male die side wall region and a female and male die circular corner region; S3, the region, located on the periphery of the local sharp difficult-to-form structure, of ablank is determined to serve as a local temperature control position, and local temperature control is conducted; S4, drawing beads are designed according to the curvature and the drawing depth of anarc-shaped flanging portion of the peripheral arc-shaped flanging structure, and a first material storage chamber is designed; and S5, technological holes are designed according to the curvature and the drawing depth of an arc-shaped flanging portion of the inner hole arc-shaped flanging structure, and a second material storage chamber is designed. The optimized adjustment and control method of the passenger vehicle high-strength integral side body stamping technology can achieve stamping forming of the high-strength integral side body, and prevents the local breakage defect from being generated.

A method and apparatus for processing a projection signal, which solve the problem in the prior art that a terminal is powered off or reset due to excessively large impact current of a projector, realize optimized control of the terminal on the usage of battery power, avoid the risk of terminal power-off or reset due to a sudden drop in the battery power caused by projection impact, and improve user experience. The method comprises: acquiring a supply voltage of a terminal (S102); acquiring the voltage of a projection signal of a projector on the terminal (S104); and determining whether to perform attenuated output on the projection signal according to the supply voltage and / or the voltage of the projection signal (S106).

The invention relates to a manufacturing method of a curved micro-lens array of which the focal length varies with spatial distribution. A planar micro-lens array PDMS film is prepared on the preparedmother board, then a PDMS film varying along the radial thickness is manufactured, then a layer of PDMS is poured, the planar micro-lens array film is put on the PDMS, and then the rotationally symmetrical and radial thickness varying planar micro-lens array is manufactured after curing; and the planar micro-lens array is fixed on a closed clamp, the curved micro-lens array can be manufactured bychanging the internal and external pressure intensity difference, and all the small lenses are identical in curvature, diameter and spacing angle and different in radial film thickness so as to formthe curved micro-lens array of which the focal length varies with the spatial distribution. The method is simple in structure without complex equipment and low in cost. Compared with the planar micro-lens array, the curved micro-lens array has the characteristic of wide viewing angle possessed by the insect compound eyes, and the light condensing range of the curved micro-lens array can be changedby changing the bending degree of the micro-lens array through the pressure intensity difference.

The invention discloses an aluminum alloy anode material for batteries. The aluminum alloy anode material is prepared from the following components in percentage by mass: 0.001-1% of lanthanum, 0.001-1% of gallium, 0.001-1% of magnesium, 0.001-1% of indium and the balance of aluminum. The invention further provides a preparation method of the aluminum alloy anode material for batteries. According to the preparation method, three types of different thermal treatment processes such as high temperature and long time, medium temperature and short time and low temperature and long time are matched with a deformation process, and optimal regulation and control on material components, texture structures and alloy phase of the aluminum alloy anode material are achieved. The addition of alloy elements is appropriately adjusted, and with the combination of appropriate plastic formation processes and thermal treatment processes of the aluminum alloy anode material, optimal matching of multiple elements can be achieved, and requirements of power source discharge can be met under a large current density of 500mA / cm<2> / 1000mA / cm<2>. The aluminum alloy anode material disclosed by the invention is short in production process procedure, easy in process parameter control, good in aluminum alloy anode product quality, low in production cost and beneficial to on-scale production.

The invention relates to a composite spacer ring-nutation damper for controlling overall galloping of a wire. The composite spacer ring-nutation damper is arranged on a high-voltage power transmissionsplit conductor and comprises a wire clamp spacer ring damping device and nutation damping devices, wherein the wire clamp spacer ring damping device is connected with each split sub-conductor, and the nutation damping devices are connected with the wire clamp spacer ring damping device and arranged on the two sides of the wire clamp spacer ring damping device. Compared with the prior art, the composite spacer ring-nutation damper has the advantages of being high in energy consumption, self-adaptive in energy consumption, high in sensitivity, convenient to install, convenient to design according to needs and the like, and has important value for solving the technical problem of galloping control of the high-voltage power transmission split conductor, especially overall galloping control of the conductor.

The invention relates to a traffic signal optimization iteration method based on message matrix gridding. The method comprises the following steps of initializing a traffic network model related parameter matrix; initializing a traffic flow state matrix according to road traffic information obtained by a microwave vehicle detector and establishing a network node message function basis matrix; calculating a message function matrix of each iteration of this node; obtaining the message function matrix of the downstream node; calculating the optimal signal control quantity in the iteration; calculating the global optimization result; judging whether a system is stable; if the system is stable, stopping cyclic iteration; and otherwise, continuing the next cyclic iteration. The invention provides the signal optimization control method obtaining traffic flow information in real time in a traffic network and using the message function matrixes to realize stable optimization, rapid convergence and high real-time performance in a signal optimization iteration algorithm.

The invention discloses an intelligent IGBT constant current drive device, which comprises an isolated DC-DC module, a PLD digital control module, a DAC digital-to-analog conversion module, a controlled constant current source, a voltage comparison logic circuit, a gate-level current acquisition circuit and Current comparison logic circuit. The driving power and driving signal of the primary side control part provide isolated driving power and driving signal for the secondary side through the isolated DC-DC module, and the alarm signal of the secondary side provides an isolated alarm signal for the primary side through the isolated DC-DC module; The output terminals of the driving signal, the voltage comparison logic circuit and the current comparison logic circuit are connected to the input terminal of the PLD digital signal, the output of the PLD is connected to the input of the DAC digital-to-analog conversion module, and the output of the DAC digital-to-analog conversion module and the subtraction circuit is connected to the controlled constant The input of the current source is connected, and the output of the controlled constant current source is connected to the gate level of the IGBT through the driving resistor Rg. The device of the present invention takes PLD digital control as the core, and can adjust the output of the control loop according to the difference in parameters of different types of IGBTs, so as to realize the optimal control of different series and types of IGBTs.