184 results about "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.

A non-intrusive device for automatically dosing at least one liquid laundry care composition to an automatic laundry washing machine. The device employs a Venturi tube mechanism or a pump to dose the laundry detergent care composition. The dosing is controlled by a machine-generic algorithm capable of determining the actual cycle at any duration of wash for various cycle designs from various washing machines, without the input of precise cycle design; and dose the correct products correctly and is capable of distinguishing between major water addition and a water pulse.

A flight control system is configured for controlling the flight of an aircraft utilizing a three control loop design to robustly increase system performance. An inner loop comprises an improved linear quadratic regulator (LQR) search method, and an outer loop comprises a classic feedback summary gain design. A third loop comprises a steady state trim search method.

A non-intrusive device for automatically dispensing at least one liquid laundry care composition to an automatic laundry washing machine. The device employs a Venturi tube mechanism or a pump to dose the laundry detergent care composition. The dosing is either manually controlled or controlled by a machine-generic algorithm capable of determining the actual cycle at any duration of wash for various cycle designs from various washing machines, without the input of precise cycle design; and dose the correct products correctly and is capable of distinguishing between major water addition and a water pulse.

A static, double-edge-triggered flip-flop has an upper data path and a lower data path connected between a data input node and an output terminal. The upper path includes a switch connected to a first data loop, and the lower path includes a switch connected to a second data loop. The first and second data loops share a forward path having a data-inverting circuit. In addition, each loop has a feedback path which contains only one element in the form of a switch. However, no data-inverting circuit is included in either of the feedback paths. Advantageously, all the elements of the flip-flop may be constructed using MOSFET transistors implemented according to any one of a variety of semiconductor technologies. In more than one particularly advantageous embodiments, the flip-flop is constructed using a total of twelve transistors. Through this simplified two-loop design, operational efficiency is improved, low metastability is achieved and costs of manufacture are lowered, all while maintaining low power requirements.

Charge-based charge pumps are described which include a switchable capacitor configured for connection to a voltage source, a ground, and a charge pump output. A first pair of switches include a first switch configured to connect the switchable capacitor to ground and a second switch configured to connect the switchable capacitor to the voltage source. A second pair of switches include a third switch configured to connect a first node, between the switchable capacitor and ground, to the charge pump output, and a fourth switch configured to connect a second node, between the switchable capacitor and the voltage source, to the charge pump output. Locked loop designs, such as phase locked loops or delay locked loops, are described that include charge-based charge pumps.

Disclosed is a structural dynamics design method of the rotor of an aerial engine. Based on the characteristics of the working status of a high propulsion ratio aerial engine, the structural dynamics design method of the rotor of the aerial engine presents the concept of thermal modal to adapt to structural dynamics design of the rotor of the aerial engine under variable working conditions. The structural dynamics design method of the rotor of the aerial engine is characterized by optimizing the parameters of the rotor and bearings, enabling the thermal modal of a rotor system to avoid the modal of the rotor under the absolute rigidity of the bearings, meanwhile, giving play to the effects of a damper and enabling the rotor system to meet the requirements of vibration standards in the thermal modal. The structural dynamics design method of the rotor of the aerial engine comprises taking the margin between the modal of the rotor with elastic bearings and the modal of the rotor under the absolute rigidity of the bearings as optimized parameters, meanwhile giving play to the damping effects of the damper to meet the dynamics requirements of the rotor system. The structural dynamics design method of the rotor of the aerial engine changes the traditional design concept of design first and checking calculation later and performs active design of the dynamics characteristics of the rotor to achieve circulating design, thereby improving the working efficiency and having significant engineering practical value.

The invention discloses a design method for an intelligent transformer station model based on CAD (Computer-Aided Design) graph and model integration. According to the method, the design of a secondary loop and the generation of a model file of the intelligent transformer station are synchronously completed; a data object corresponds to the back of each entity, and the model can be operated by a graph, therefore, the consistency of the design of the secondary loop and the model file is ensured, and the problem that the traditional intelligent transformer station is not deep enough is solved; and synchronously the design of the transformer station model can be finished by designers not familiar with 61850 design details, the role and the function of a design organization are strengthened in the establishing of the intelligent transformer station, and the visibility in operation and maintenance of the transformer station is increased; furthermore, the method is combined with the habits of traditional designers and is used for performing graphical loop design based on an AutoCAD platform so that the operation of the designers is convenient; an IEC61970CIM model is used in a primary system to describe the model, therefore, the data supporting other applications can be exported, and the openness of the method is increased.

The invention belongs to the field related to robot controllers, and particularly relates to a driving-and-control-integrated control system and a control method for a joint-type mechanical arm. According to the driving-and-control-integrated control system, main control of a robot control system and motor movement control are finished by utilizing one integrated ARM-DSP chip; external interface communication, power control and electric current loop design are realized by utilizing two FPGA chips; and at most 7 paths of servo motors are subjected to time-sharing control by utilizing one DSP chip. The driving-and-control-integrated control system has the advantages that communication data interaction between the ARM and DSP chips adopts a internal storage access mode, so that data interaction speed is the highest; a no-operation system scheme and a hardware interrupting real-time scheme are adopted, so that the real-time property of the system is improved to the greatest extent; a Cartesian space kinematics calculation result is secondarily optimized in a joint space, so that movement smoothness of the motors is ensured; and a software and hardware parallel processing mechanism is adopted, and an uninterrupted data "interaction-use-refilling" process is designed, so that system data interaction and use do not interfere with each other.

A method is directed to providing adaptive digital control for the PFC front-end of a switching mode power supply. The method uses an evaluation model to adjust control loop parameters of a control algorithm used by a controller on the primary side of the power supply. The method performs a series of step adjustments of the control loop parameter values to determine optimized values. In some implementations, the method determines and compares the line current THD corresponding to different control loop parameter values. The method provides simplified digital control loop design, optimizes PFC front-end performance, improves system efficiency by decreasing harmonic ripples, and reduces labor cost and time to market due to shorter research and development phase. System performance optimization is fully adaptive adjusted for changes in operating conditions due to, for example, environmental and temperature variations.

The invention belongs to the technical field of a radio frequency wireless transceiver and particularly relates to a frequency synthesizer suitable for a software radio system. The frequency synthesizer provided by the invention comprises module circuits such as a phase frequency discriminator (PFD), a charge pump, a loop filter, a voltage-controlled oscillator, a programmable frequency divider, a sigma-delta modulator, an automatic frequency calibration circuit, an orthogonal output frequency-halving divider and the like, can cover each frequency range of protocols such as WCDMA (wideband code division multiple access), GSM (global system for mobile communication), TD-SCDMA (time division-synchronization code division multiple access) and the like and is suitable for the software radio system. Compared with the traditional frequency synthesizer, the frequency synthesizer provided by the invention has the improvements in the aspects of voltage-controlled oscillator structure, loop design, automatic frequency calibration algorithm and the like to realize better phase noise and frequency spectrum stray performance and has short locking time.

An electrical cable connector has a latch mechanism wherein the moveable portion is part of the mating receptacle, and the mechanism for unlatching resides in the cable connector. A rocker part is located such that one end extends under the resilient latch member and the other end has a surface which is made to rotate about a pivot point by an externally actuated ramp. The rotation of the rocker lifts the resilient member from its seat and releases the connector latch. The actuating ramp is spring loaded to return to its resting position which is the latched position; it is attached to a loop designed to allow a finger pull action to initiate latch disengagement. Forces and friction resistance is managed such that reliable single-hand operation is achieved, with push to engage and pull to disengage.

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.

The invention relates to a single-module independent water-cooled type automobile tail gas thermoelectric conversion device and method. The device consists of a thermoelectric conversion unit and a voltage polling unit and is characterized in that: an engine exhausts high-temperature tail gas; in a plurality of thermoelectric conversion modules of the thermoelectric conversion unit, the hot ends absorb the heat of the high-temperature tail gas and the cold ends cling to an independent small water tank; the temperature difference between the hot ends and the cold ends is increased by cooling water of a cooling device of the engine or a cooling water loop designed externally and independently, so that direct-current electric energy is generated; the voltage polling unit detects the direct-current voltage generated by each thermoelectric conversion module; and optimal series and parallel combination is performed according to the output characteristic of each thermoelectric conversion module, so that output power and conversion efficiency of the automobile tail gas thermoelectric conversion device can be improved to the maximum degree. The temperature difference between the hot ends and the cold ends is increased by the single-module independent water-cooled mode; the heat of the waste gas exhausted by the automobile is effectively utilized; and the generated electric energy is applied to vehicle-mounted equipment, so energy conservation and emission reduction of the automobile are facilitated.

The invention discloses a design method for the fluid-solid coupled integration of the structure integrity of a large-small leaf integral blisk. Firstly, digitalization models of a fluid-solid interface and a structure are constructed; then, the design of structure integrity is accomplished based on the constructed models. The method includes the two cyclic designs: one is the cyclic design between aerodynamics and the structure integrity; the other is the integration cyclic design of various aspects (strength and vibration etc.) of the structure integrity itself. The invention realizes the aerodynamics-structure integration design of the structure integrity of the integral blisk, and enhances the design quality and the use security and reliability.

The invention discloses a pressurization control loop and method of a piling machinery power head. The pressurization control loop is a pressurization logic control loop designed through electric hydraulic combined control. The control loop is simple and convenient for a pressurizing winch to coil/uncoil a rope, and convenience in loading and unloading is realized. By the control method, the pressure of pressure oil in the loop is controlled by an overflow valve and a check valve, so that when a main winch hoists, the pressurizing winch can automatically uncoil the rope along the main winch; when the main winch lowers, the speed of the pressurizing winch to coil the rope is perfectly matched with the speed of the pressurizing winch to uncoil the rope; when the pressurizing winch pressurizes, the pressure is controlled by the overflow valve, so that the condition that the pressure of the power head is controllable is realized.

The invention discloses a novel double-loop control method for a dual-active bridge DC/DC converter based on double phase-shift control. Under a double phase-shift control mode, a transfer function from the internal and external phase-shift angles to output voltage in different operating modes are obtained by using a small signal modeling technique in order to guide the inner-loop design of the dual-active bridge DC/DC converter. By establishing a relation between a loss model and peak current in different operating modes, the internal and external phase-shift angles in different operating modes during the optimal peak current are obtained so as to guide the outer-loop design of the dual-active bridge DC/DC converter. The use of a double-loop control compensation system can increase the cutoff frequency of the system, can greatly improve the dynamic response of the system, can reduce the static error of the system, and can realize the fast response speed and precision. The control method of replacing the optical loss with the optical peak current can simplify controller design and realize the real-time control of the converter.

The invention provides an insulator leakage current collecting ring, which comprises a fixed clamp ring, a current collecting coil, a contact metal sheet, an electric conduction screw and a positioning screw, wherein the upper surface of the fixed clamp ring is provided with a coil mounting slot; the side face of the fixed clamp ring is provided with a mounting connector for opening or locking the fixed clamp ring; the current collecting coil is arranged in the coil mounting slot of the fixed clamp ring; the contact metal sheet is arranged below the fixed clamp ring; the electric conduction screw penetrates the fixed clamp ring from top to bottom to connect the current collecting coil with the contact metal sheet; and the positioning screw penetrates the fixed clamp ring from outside to inside. The insulator leakage current collecting ring provided by the invention has a particular open-loop design, and can be conveniently arranged on the surfaces of post insulators and suspension insulators with various different types to collect the leakage current of the surfaces of the insulators. The invention also provides an insulator leakage current collecting device. The insulator leakage current collecting ring and the insulator leakage current collecting device have the advantages of accuracy in measurement, convenience and fastness in installation and high anti-interference capacity.

The invention relates to a method and a device for permanent-magnet arc-shaped groove inner surface axial sorting. The method comprises the following steps: the sorted materials flowing through the field intensity of the inner surface of a rotating separating drum (2) and the sorted materials in a gradient area are absorbed by using the energy on the inner surface of a permanent magnet arc-shaped groove (1); the materials with lower specific susceptibility flow out from a low-magnetic material outlet (9) through a sorted material channel (13), and the materials with higher specific susceptibility are absorbed on the rotating separating drum (2), directly fall to a high-magnetic silo (7) by means of the own gravity, flow through a high-magnetic material outlet (8) and then are collected, therefore, the purpose of sorting the materials with different specific susceptibility is achieved. The invention has the advantages that the yield and the recovery ratio are greatly improved; the sorting range can be extended, and the sorting loss of the valuable substances is reduced; no sorting missing exists, and the sorting effect is good; the overall inclination angle theta is adjustable, the field intensity and the gradient can be changed, and the region angle of the field intensity and the gradient is 10-350 degrees; the permanent-magnet arc-shaped groove adopts the open loop design, therefore, the permanent magnet material is saved; and the separating drum is not required to be eccentrically arranged and can be easily manufactured and installed.

The invention relates to a fire-fighting robot arm double-coupling simulation method, which is characterized by comprising the steps of hydraulic loop design, a Pro/e rigid body modeling, an ANSYS flexible body modeling, a kinematics and dynamics simulation, a machine and hydraulic coupling simulation, rigid and flexible coupling simulation and double-coupling analysis, wherein the rigid and flexible coupling simulation is that an ANSYS flexible body model of a large arm and an ANSYS flexible body model of a small arm respectively replace rigid body models of the large arm and the small arm in a rigid body assembling body, thereby obtaining the rigid and flexible coupling model to carry out the rigid and flexible coupling simulation; and the double-coupling analysis is that the combined simulation of the machine and hydraulic simulation and the rigid and flexible simulation. The method is mainly used for the dynamic simulation and experiment of the fire-fighting robot arm, is convenient for integrally mastering the change rules of stress, strain and hydraulic pressure system parameters, saves the simulation time, improves the simulation efficiency, and shortens the design cycle ofthe robot arm.

The present invention relates to a prepuce cutting device, which solves the technical problem of the defect of the prior prepuce cutting device which can not expand along with the prepuce erection. The present invention provides an open-loop prepuce cutting device which comprises a cutting ring and a bandage; the external circumference of the cutting ring is provided with an annular groove and the bandage can bind the prepuce in the annular groove; the cutting ring with certain flexibility is provided with a fracture; the bandage can be a retractable flexible bandage and the flexible bandage can select sterilized and disinfected nylon line, suture, flexible rubber ring, etc., so the abundant prepuce of the patient is bound on the cutting ring and the partial prepuce naturally falls off due to avascular necrosis. As the cutting device is the open-loop design, the internal diameter can be automatically adjusted, and when the prepuce erects, the ring can expand, and when the penis weakens, the ring can synchronously shrink, thus greatly reducing the patient pain. The present invention with the advantages of simple structure, convenient use, low cost and less pain is applied in the prepuce cutting operation.