112results about How to "For fast and precise control" patented technology

A method for using a downdraft gasifier comprising a housing and a refractory stack contained within the housing. The refractory stack may comprise various sections. Apertures in the sections may be aligned to form multiple columnar cavities. Each columnar cavity may comprise an individual oxidation zone. The method of use may include the steps of placing a feedstock into an upper portion of the refractory stack, measuring the temperature of each columnar cavity, and adjusting the flow of oxygen to a particular columnar cavity to maintain the temperature of the particular columnar cavity within a particular range.

The invention discloses a prediction control method of a nickel-base super alloy microstructure on the basis of a BP (Back Propagation) neural network. The method comprises the following steps: (1) according to a historical die forging process parameter and the microstructure, carrying out off-line training on a prediction neural network model and a control neural network model; (2) utilizing the die forging process parameter to predict the microstructure of a next moment via the prediction neural network model; (3) carrying out feedback correction on the predicted microstructure, and planning a microstructure target value of the next moment; (4) according to the feedback correction value and the target value of the microstructure, giving the die forging process parameter of the current moment via the control neural network model; (5) according to a soft measurement microstructure, carrying out on-line feedback regulation on the prediction neural network model and the control neural network model; and (6) jumping to the step (2), and entering the prediction and the control of the nickel-base super alloy microstructure of the next moment. The method can quickly and accurately carry out on-line prediction and control on the nickel-base super alloy microstructure, and provides an effective technical means for realizing the high-quality forging of a nickel-base super alloy part.

A fluid-driven actuator system includes a fluid-driven actuator and at least one proportional control valve and at least one pump connected to the fluid-driven actuator to provide fluid to operate the fluid-driven actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The fluid driven actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to adjust at least one of a flow in the fluid system to a flow set point and a pressure in the fluid system to pressure set point and a concurrently establishes an opening of the at least one proportional control valve to adjust at least one of the flow to the flow set point and the pressure to the pressure set point.

A drive device for a hybrid vehicle, capable of quickly outputting, even during engine start operation, appropriate output torque to a motor in response to a request by accelerator operation or the like by a driver, and a control method for the drive device. The drive device for a hybrid vehicle comprises a motor, a clutch for making or interrupting transmission of drive force between the motor and an engine, and a control device for performing operation control of the motor and the clutch. Upon receiving an engine start request while wheels are driven by the motor, the control device increases a working pressure P1 of the clutch to start transmission of torque from the motor to the engine side, detects torque Tc transmitted through the clutch, and performs control in which output torque Tmg of the motor is the sum of the transmission torque Tc and wheel drive request torque Tth that is determined based on the accelerator opening.

A photonic chip based on periodical poling and waveguides circuits in ferroelectric crystals, the method is based on the integration of waveguide circuits, periodical poling and electro-optic modulator (EOM). The chip is illustrated by FIG. 1. The waveguide circuits guide the photons and makes linear operations like the beam splitting, filtering etc. on the photons. The periodical poling enables the efficient spontaneous parametric down conversion (SPDC), resulting the generation of entangled photons. The EOM controls the phase of photons dynamically. The following directional coupler distributes the entangled photons and the quantum interference takes place, resulting different types of path-entangled states by controlling the voltage of EOM insides the chip.

The invention relates to a method for controlling position of a pinch roll at a finish rolling inlet of a hot continuous rolling device. The method comprises deciding to adopt a linear control method and a non-linear control method according to different position deviations at two sides of a pinch roll during pinch roll gap control, determining an entry switching point between linear control and non-linear control according to the curvature of a curve in the non-linear control process and the straight slop in the linear control process through combination of linear control and non-linear control, to precisely control position deviations, and implementing uninterrupted high precision position control according to combination of characteristics of the two control methods during control to meet demands of the whole automatic positioning control. By adopting the method for controlling the position of the pinch roll at the finish rolling inlet of the hot continuous rolling device, the problem that the efficiency of a manual control method and the control precision are low can be solved.

Equipment for preparing electronic grade nitric acid having a concentration of 68% from industrial grade nitric acid having a concentration of 98% is disclosed. The equipment comprises a rectifying tower provided with heating coils made of metal tantalum. The rectifying tower is filled with a glass raschig ring filling material. The diameter of the rectifying tower is 180-250 mm and the height of the rectifying tower is 5-10 m. A process for preparing the electronic grade nitric acid having a concentration of 68% from the industrial grade nitric acid having a concentration of 98% is also disclosed. The diameter of the rectifying tower is set to be 180-250 mm, the height of the rectifying tower is set to be 5-10 m, the reflux ratio is controlled to be 1:2-1:5, the heating coils in the rectifying tower are made of the metal tantalum, and the rectifying tower is filled with the glass raschig ring filling material. According to the equipment and the process, a finished high-purity product of the electronic grade nitric acid can be prepared by one time of distillation, thus saving resources and reducing pollution.

The invention discloses an integrated type drive-by-wire hydraulic braking system and an ABS control method thereof. According to the method, based on double closed-loops formed by the slip rate and the braking torque, a layered control framework comprising upper layer control, middle layer control and bottom layer control is adopted, the deviation between the current slip rate and the expected slip rate of an automobile is used as a control variable, the wheel cylinder target pressure is calculated, and the braking wheel cylinder pressure is adjusted. The system is high in control accuracy, high in response speed and capable of being easily integrated to other control functions.

The invention discloses a high-speed and high-precision all-fiber polarization control device which relates to the technical field of fiber polarization control, in particular relating to a device for realizing light polarization control through phase modulation, and aiming at designing a high-speed and high-precision all-fiber polarization control device which has the advantages of small volume, simple structure, strong anti-interference performance and easiness for realization. In the scheme, a main light path is formed by connecting a light source, a four-port light polarization beam splitter/combiner, a phase modulator and a 90-degree rotation Faraday reflection mirror. The output end of the light source is connected with the input end of the four-port light polarization beam splitter/combiner, the reflection port of the four-port light polarization beam splitter/combiner is sequentially connected with the phase modulator and the 90-degree rotation Faraday reflection mirror to form a control arm, and the transmission output end of the four-port light polarization beam splitter/combiner is connected with the 90-degree rotation Faraday reflection mirror to form a reference arm. The optical path of the control arm is strictly equal to that of the reference arm, and the control on the light polarization is realized by modulating the phase difference of the control arm and the reference arm through utilizing the phase modulator. Through combining the four-port light polarization beam splitter/combiner with the 90-degree rotation Faraday reflection mirror, the birefrigent effect of optical devices and fibers can be eliminated, and the stability and anti-interference capability of the system can be enhanced, and the high-speed phase modulator guarantees that the working frequency of the device reaches 109Hz.

The invention relates to a method for preparing strong-fragrance peanut oil through a microchannel reactor. The method comprises the following steps of step I, pumping peanut enzymolysis reaction fluid and an enzyme solution into the microchannel reactor, performing mixing in a first mixing module to obtain a mixture, enabling the mixture to enter a reaction module, and performing an enzymolysis reaction; step II, performing high-temperature enzyme activity inactivation, and ending the enzymolysis reaction; step III, thoroughly mixing a reaction system with reducing sugar and peanut oil so as to obtain a mixed reaction system; step IV, enabling the mixed reaction system to enter a second high-temperature module, rapidly raising the temperature to reach the temperature required by a technology, and performing a Maillard reaction; and step V, enabling the reaction system to flow across a low-temperature module and flow out of the microchannel reactor so as to obtain crude products of the strong-fragrance peanut oil. Through the adoption of the method disclosed by the invention, the enzymolysis process can be accurately controlled, and the thermal reaction temperature and the post-treatment temperature can be quickly and accurately controlled; and through the usage of the microchannel reactor, amplification effects are not generated, upgrading and amplification are easy, and seamless amplification from research and development to production can be realized.

The invention provides a short-distance takeoff ideal scheme of a running take-off airplane. The core technology is that a runway is divided into a fixed part and a dynamic part, and the fixed part is closely connected with the dynamic part, so that the airplane is static relative to the fixed runway when running on the dynamic runway and enters into the fixed runway till being accelerated at a preset speed on the dynamic runway, therefore, the airplane can realize the short-distance takeoff under the status of high initial speed and large kinetic energy. The airplane not only meets the best requirements of the aircraft carrier airplane such as short-distance takeoff, full-load takeoff and full-oil takeoff, but also has the capability of short-distance landing. A crawler type integrated dynamic runway has the functions of short takeoff and landing, can be used for preventing the airplane from rushing out of the runway in a land aerodrome, can be used for building a military field aerodrome, can be used for building a temporary takeoff and landing point for the vehicle-mounted (carrier-based) military aircraft, possibly brings the development direction of the miniaturization and the submarine trend of the aircraft carrier, and possibly brings the great change of an air operation mode. The airplane jointly uses three schemes such as a crawler type integrated dynamic runway, a three-point type synchronous running wheel short-distance take-off airplane, a straight line type synchronous column wheel short-distance take-off airplane, and the like.

A device for damaging weeds, the device having a pressure-conveyance unit, which is designed to convey a fluid under pressure, and a fluid-dispensing unit, which is fluidically connected to the pressure-conveyance unit and is furthermore developed to dispense the pressurized fluid to the weed in order to damage the weed, the fluid-dispensing unit including at least one valve that has a piezo-actuator or an electroactive polymer actuator or a magnetoresistive actuator.