122results about How to "Decelerate fast" patented technology

The invention provides a hybrid vehicle and a control method thereof with which, in a case where a vehicle speed V obtained by a vehicle speed sensor equals or exceeds a first determination vehicle speed V1 at a time of occurrence of an internal combustion engine-related abnormality, which is when an abnormality relating to motors MG1 and MG2 is determined not to have occurred but an abnormality relating to an engine is determined to have occurred while the engine is operative, the motors MG1 and MG2 are controlled such that traveling torque is output to a ring gear shaft serving as a drive shaft from the motor MG2 while the engine is motored by the motor MG1 such that a crankshaft rotates at a target rotation speed until the vehicle speed V subsequently falls to or below a second determination vehicle speed V2.

The invention relate to a device and a method for controlling a single-bus modular digital actuator of a robot. The device comprises an actuator control unit, a direct-current motor, a communication module, a speed reduction mechanism, position and temperature sensors and a current protection circuit. The method includes that the actuator control unit computes control parameters according to the running temperatures, driving currents of the motor and the position of the actuator and outputs the control parameters to a motor control circuit; the communication module receives control instructions of an upper computer and feeds information of the current position of the actuator, the current speed of the actuator and the like to the upper computer; a high rotational speed and low torque of the motor are converted into a low rotational speed and high torque by the speed reduction mechanism and an output mechanism, and the low rotational speed and the high torque are outputted by the speed reduction mechanism and the output mechanism; the position sensor, the temperature sensor and the current protection circuit are respectively used for feeding current position signals of the actuator, the running temperatures and the driving currents of the motor to the actuator control unit, so that closed-loop high-precision safety control can be implemented. The device and the method have the advantages of overcurrent, overvoltage and over-temperature protection, capability of preventing overload or over-temperature damage, high response speed, zero dead zones and high control precision.

The invention discloses an emergency braking control method achieved through an electrical park brake. Under the emergency braking condition (for example, a brake pedal is blocked), after status information applied by a park brake switch is collected through an electrical park brake (EPB) system, a command is sent to a vehicle body electrical stable system (ESP) through bus communication, four wheels are braked at the same time through the ESP according to the deceleration value required by the EPB, and if one wheel of a vehicle is locked, the ESP can initiatively execute an anti-lock program. By means of the series of movements, safe and stable braking of the vehicle can be achieved, and person safety and vehicle safety are guaranteed.

Method for operating a longitudinal driver assistance system of a motor vehicle (1), especially of an ACC system (2), which is designed to control the speed of a motor vehicle (1) to a desired speed in a free travel mode and/or keeps a controlled distance to a vehicle in front as the control object in a follow mode, at least one control parameter influencing control being adapted depending on at least one item of traffic information that describes traffic conditions on the currently traveled route, especially in the further course of the route, said information being received from an external transmitter (7,9).

The invention belongs to the field of projectile tests and experiments, and particularly relates to a test projectile recovery device. Partial liquid is filled in a recovery capsule, a large number ofliquid bubbles can be formed through the links such as a high-pressure air pipe, a metal air pipe, a one-way valve, an air inlet hole and an open cell foam inner cylinder by utilizing high-pressure gas in a gas cylinder, the liquid bubbles enter the recovery capsule, and the liquid containing the large number of liquid bubbles becomes compressible liquid. When a test projectile rushes into the liquid containing the large number of liquid bubbles at high speed, by utilizing the compressibility of the air bubbles and the damping characteristic of the liquid, the damage of the projectile causedwhen the projectile enters water is prevented, a speed reducing function of the projectile is realized, and a high-speed test projectile recovery function is realized. The test projectile recovery device provided by the invention overcomes the defects of sand box recovery, mechanical buffer recovery, foamed aluminum recovery, water damping recovery and gas recovery, provides a new method for the recovery problem of the projectile experiment process, has a certain value on recovery during the projectile experiment, and is worth to be popularized in the projectile recovery technology.

An AC motor can be decelerated in as a short time as possible by means of an inverter and the current is controlled below a predetermined value so that the inverter does not stop because of an overcurrent or the AC motor does not fail due to burnout even if the AC motor is liable to be magnetically saturated. A method and device for driving an AC motor by means of a voltage inverter having therein a voltage correcting section for correcting a given voltage command by using the value obtained by passing a DC bus voltage detected value through a primary delay filter. The AC motor is decelerated in an overexcited state by increasing the time constant of the primary delay filter above the time constant in the normal control state. The current flowing through the AC motor is monitored and the time constant is adjusted according to the current flowing through the AC motor. Therefore, the AC motor is decelerated without causing a failure and the deceleration time can be shortened.

A method and computer program for determining an error factor for a differential global positioning system is disclosed as well as a method of tracking a vehicle. In determining the error factor, estimated positional data is transmitted from a GPS via GPRS to a server. Since the GPS signals are being transmitted from a vehicle travelling along a known route, i.e. a road or rail track, the data can be matched to the route and a correction factor calculated. The error factor is then transmitted to differential GPS devices. For vehicle tracking a global positioning system sends, via GPRS, data a regular intervals relating only to its position.

A refrigerant recovery device comprises a compressor 1 which draws in chlorofluorocarbons gas. Chlorofluorocarbons gas that has increased pressure and temperature by being discharged from the compressor 1 is conducted through a heat exchange device 2 to become liquid refrigerant. The liquid refrigerant is conducted by a liquid pipe 13 to a refrigerant recovery tank 7. Gas of the refrigerant inside the refrigerant recovery tank 7 is conducted to the compressor 1 by a gas pipe 21. The heat exchange device 2 comprises the first helical piping 3 formed by winding a small diameter heat transfer pipe, a large diameter tube 5 with a cross-sectional area larger than the previous heat transfer pipe and the second helical, small-diameter piping 4 with a structure similar to the first helical small-diameter piping 3, these elements being connected in serial as a single unit, or alternatively the heat exchange device comprises two or more single units connected together. The liquid pipe 13 comprises a solenoid valve 6 that is controlled by a pressure sensor 14 to open at a preset upper value and to close at a preset lower value. The gas pipe 12 comprises a solenoid valve 22 that is controlled by a pressure sensor 24 to open at a preset upper value and to close at a preset lower value. The present invention provides a refrigerant recovery device that is cheap, compact and is portable and easy to operate for inexpensively recovering chlorofluorocarbons.

The invention discloses a novel high-precision constant temperature and constant humidity air conditioner which comprises two subsystems including an air handling system and a water circulating system; the air handling system comprises an air filter, a micro-control electronic valve, a blower, an air compressor, a membrane dehumidification component, a static pressure device, a heat exchanger, a vortex tube and a humidifying device, which are connected in sequence; the water circulating system comprises a water storage tank, a water filter, a booster pump and a humidifying spray nozzle, which are connected in sequence. Compared with a conventional air conditioner, the novel high-precision constant temperature and constant humidity air conditioner has the characteristics of simple structure, high control precision, long service life and low energy consumption and has a better market prospect.

The invention discloses a fixed wing aircraft. A pair of ailerons distributed up and down is mounted on the rear edge of a wing on each side. A pair of rudders distributed left and right is mounted onthe rear edge of a vertical mounting face. A pair of elevators distributed up and down is mounted on the rear edge of a horizontal mounting face on each side. According to the fixed wing aircraft, abrand-new pneumatic layout structure is adopted, one pair of the ailerons/rudders/elevators can be selected to be rotationally opened, and the traditional working manner and functions are kept; each pair of the ailerons/rudders/elevators can be opened at the same time, a certain included angle is formed, and within the same time, the wing/horizontal mounting face on each side has the ailerons/elevators deviating upwards and downwards and the vertical mounting face has the rudders deviating leftwards and rightwards; the flying resistance of the aircraft is increased, the effect of rapidly reducing the speed is achieved, the fall time and distance are shortened, and control ability is improved; and more flying experiences and actions can be expanded, and more funs and challenges are increased for vast fans.

The invention relates to a brake control method of a wind driven generator yaw system. When the yaw system is in a yawing state, the excitation power source of a yaw motor is connected forwards; when the yawing of the yaw system is completed, the excitation power source of the yaw motor is connected reversely; when the rotating speed of the yaw motor is zero, the reverse excitation power source is disconnected from the yaw motor. According to the brake control method of the wind driven generator yaw system, after the yawing of the yaw system is completed, the excitation power source of the yaw motor is connected reversely, and at the moment, the direction of rotation of the yaw motor is opposite to the direction of rotation of a rotating magnetic field; in other words, when the electromagnetic torque generated by the yaw motor is a braking torque, the yaw motor decelerates quickly; meanwhile, the two ends of the armature of the yaw motor are connected to an exciting coil and energized to generate a magnetic field, the armature is pulled in by a magnet yoke and then a yaw bearing is mechanically braked by the armature and by use of a connecting flange, and due to the combination of the magnetic field and the mechanical braking, the braking distance is shortened and the accuracy of braking is guaranteed.

The invention provides a yarn tension adjustable type intelligent yarn conveying device, which comprises a casing, a yarn conveying wheel, a driving motor, a tension sensor, a tension comparing unit and a tension control unit. The driving motor is installed on the casing, the yarn conveying wheel is installed on an output shaft of the driving motor, a tension measuring part of the tension sensor is located on a yarn delivering path, the tension comparing unit and the tension control unit are installed in the casing, the input end of the tension comparing unit is connected with the tension sensor, and the output end of the tension comparing unit is connected with the input end of the tension control unit. The yarn tension adjustable type intelligent yarn conveying device is characterized in that the driving motor is a brushless direct current motor. The yarn tension adjustable type intelligent yarn conveying device can meet the requirement of high-speed running of the yarn conveying wheel, ensure yarn conveying when a tension value is a certain appropriate value and avoid the phenomenon that yarns are snapped and cannot be conveyed in the yarn conveying process.

The invention provides a motor deceleration control method by an inverter. Multiple sub processes with the same processing flow are adopted to adjust the deceleration time repeatedly, and as for two adjacent sub processes, the deceleration time of a next sub process is adjusted according to the processing result of a former sub process. Each sub process comprises steps: the current operating parameters of the motor, the corresponding parameters of a DC bus of the inverter and the limiting values of the corresponding parameters of the DC bus are acquired; according to the difference between thecurrent operating parameters of the motor or the corresponding parameters of the DC bus and the limiting values of the corresponding parameters of the DC bus, PID control operation is carried out toobtain an adjustment amount; the deceleration time of the current sub process is calculated; and according to the deceleration time, the output frequency of the inverter in the current sub process iscalculated, and motor deceleration is controlled according to the output frequency. Thus, quick motor deceleration can be achieved while no brake resistor needs to be mounted.

The invention discloses a telescopic double-layer feeding car for an aerial ladder. The telescopic double-layer feeding car comprises a large car frame, a small car frame and adjusting wheel sets which are integrated onto the large car frame and the small car frame; a braking assembly is assembled onto a structural framework and can swing downwards so as to make contact with a ladder arm to form africtional braking tooth piece; a pulling assembly is in transmission connection with a steel wire pulling rope of an outer feeding winch through a winding wheel; the steel wire pulling rope providesupward movement motive power for the feeding car; and an adjusting assembly is in transmission connection with the front adjusting wheel set so as to adjust the width of a first travelling channel and is in transmission connection with the back adjusting wheel set so as to adjust the width of a second travelling channel. According to the double-layer feeding car, a hopper is horizontally assembled onto the structural framework through a hopper mounting portion, the effect that the hopper is about 600 mm away from a basic surface is guaranteed, and thus loading and unloading are convenient foroperators; and besides, the adjusting wheel sets which can adjust the widths of the travelling channels according to the width of the ladder arm so as to guarantee that adjusting wheels can be in rolling contact with a ladder arm track all the time are designed, and the applicability of the feeding car is improved.

A fuel injector (100) is disclosed. It comprises a valve (120) with a needle (135) that is movable along a longitudinal axis (105) between an open position (140) and a closed position (145), for opening or closing the valve (120); an actuator (125) which comprises an armature (155) and a pole piece (250), the armature (155) is axially movable and operable to interact mechanically with the needle (135), so that the needle (135) is moved towards the open position (140) by a movement of the armature (155) in axial direction towards the pole piece (250); and a first spring (220) for biasing the armature (155) in axial direction away from the pole piece (250). The first spring (220) is configured and operable to stop said movement of the armature (155) by means of its spring force when the needle (135) is in the open position (140).

The invention relates to the technical field of power generation equipment, in particular to an energy storage flywheel protection device. The device is used for protecting a flywheel and components of a flywheel under a sudden instability state of the flywheel, so that destructive damage is prevented. The energy storage flywheel protection device comprises a magnetic sucker, a butterfly spring, arotary support, a sensor, a guide column and a pre-tightening nut, wherein the rotary support is internally and fixedly connected with an external bolt, the butterfly spring is added between the magnetic sucker and the rotary support through the guide column, the guide column is in threaded pair connection with the magnetic sucker, the guide column is in sliding pair connection with the rotary support, and pre-tightening is conducted through the pre-tightening nut. The device aims to solve the problem that the impact force of the flywheel cannot be borne by a common bearing.

The invention relates to an energy-saving endurance type electric vehicle which comprises an operation unit, a controller, a recognition distance measurement unit, a speed measurement unit, a calculation unit, a judgment unit and an energy recovery device, wherein the operation unit is used for receiving an operation instruction of a driver and outputting an acceleration signal or a braking signal; the recognition distance measurement unit is used for recognizing obstacles in front of the vehicle and measuring and outputting the actual distance between the vehicle and the obstacles in front in real time; the speed measurement unit is used for measuring and outputting the speed of the vehicle in real time; when the controller cannot receive the acceleration signal and the braking signal, the controller outputs a sliding signal; the calculation unit responds to the sliding signal to obtain the vehicle speed output by the speed measurement unit and outputs the sliding distance of the vehicle according to the vehicle speed; the judgment unit receives the actual distance and the sliding distance, and if the actual distance is not greater than the sliding distance, the judgment unit outputs a recovery signal; and the control responds to the recovery signal to control the energy recovery device to act, and kinetic energy of the vehicle is recovered.

The invention discloses a damping device and a breaker. The damping device comprises a cylinder body, a piston, a piston rod, a channel and a pressure relief device, wherein the cylinder body comprises a first end cover, a cylinder barrel and a second end cover; one end part of the piston rod runs through the first end cover, extends into the cylinder body, and is fixed to the piston in the cylinder body; the piston partitions the cylinder body into a first chamber located at the side of the first end cover and a second chamber; the pressure relief device is assembled on the cylinder body; a valve rod part of a built-in pressure relief valve core of the pressure relief device extends towards the first chamber; the breaker comprises a single-pole switch; the single-pole switch is axially connected with the damping device; the damping device decompresses and relieves damping at the end of the stroke of a vacuum bubble moving contact when closed; damping force is prevented from promoting a closing bounce of the moving contact of the breaker; and the closing performance is improved. The pressure relief device is arranged on the cylinder body of the damping device, so that installation and maintenance of the pressure relief device and change of the pressure relief valve core are facilitated.

The invention discloses a buffer device and a mechanical switch. The device comprises a cylinder, a piston, a piston rod and a pressure relieving device, wherein one end of the piston rod penetrates through a first end cover, and extends into the cylinder to be fixed with the piston in the cylinder; a cavity of the cylinder is divided into a first cavity and a second cavity at the sides of the first end cover by the piston; the pressure relieving device is assembled on the cylinder, and a valve core rod part of a pressure relieving valve rod in the pressure relieving device extends into the first cavity; an extension rod is positioned in the pressure relieving valve core for adjusting a pressure relieving trigger travel; and the pressure relieving device and the second cavity are communicated through a channel provided with an adjusting valve. The mechanical switch comprises a single-pole switch; the single-pole switch is axially connected with the buffer device; the buffer device relieves the damping force before switching on; the switching-on bounce of a moving contact is reduced; the damping releasing strength is adjusted; and the buffer device and the mechanical switch are in synergistic effect to optimize the switching-on performance. The pressure relieving device is arranged on the cylinder, and is convenient for installation, maintenance and adjustment of the pressure relieving trigger travel of the pressure relieving valve core.

The invention relates to a device and method for joining sheets of glass to form insulating glass panes. The device comprises first and second platens having extrusion surfaces mounted thereon in a face-to-face manner, respectively. The method comprises the steps of: guiding a first glass plate to the first platen and mounting on the extrusion surface thereof; guiding a second glass plate to the other platen and mounting on the extrusion surface thereof; before the guiding process, fixing a space holder on at least one glass plate; fixing and arranging the smaller glass plate on the extrusion surface; moving the platen with the smaller glass plate relative to the other platen so that the edge of the smaller glass plate extends within the edge of the larger glass plate and produces a fixed space; after the moving process, connecting the two glass plates with the space holder by moving at least one platen to reduce the space, so as to extrude and form insulating glass panes; after the extrusion process, unfixing the smaller glass plate on the extrusion surface and enlarging the platen space; and withdrawing the insulating glass panes from the device.

The invention relates to an electric vehicle brake control device. The electric vehicle brake control device comprises a front wheel brake, a rear wheel brake, a left brake handle and a right brake handle and is characterized in that the rear wheel brake is provided with an electronic auxiliary brake device, the left brake handle is connected to the front wheel brake through a brake line and provided with an electronic auxiliary brake signal switch which is connected to a controller of the electronic auxiliary brake device of the rear wheel brake through wires, a brake block comprises the following components including chromic oxide, aluminum powder, copper scraps, intermediate super abrasion furnace black, phenolic resin, barium sulfate, glass fiber, mica, natural rubber, an anti-aging agent, an accelerator, sulfur, zinc oxide, stearic acid and high aromatic oil, and the weight percentage of the components according to a formula is shown in the description.

The invention discloses an energy-saving method and a special energy-saving device for a motor vehicle. The energy-saving method comprises the steps of connecting the wheels with an air inlet valve and an air outlet valve; when the motor vehicle requires a great thrust or braking force, opening the air outlet valve, closing the air inlet valve, and closing the air outlet valve when the air amount in tires is reduced to the required amount; and when the motor vehicle requires less thrust or braking force, opening the air inlet valve, closing the air outlet valve, and closing the air inlet valve when the air amount in the tires is increased to the required amount. The energy-saving device comprises wheels connected with the air inlet valve and the air outlet valve; and the air inlet valve is connected with a compressed air source. The invention has the advantages of reasonable structure and good energy-saving effect.

The invention discloses a variable-pitch control circuit of a wind generating set and a working method of the variable-pitch control circuit, and relates to the field of electric control, in particular to a variable-pitch control circuit and a control mode of the wind generating set. The invention has the technical point that an angle set value P outputted by a main control unit is decomposed into a plurality of small angle values rp and outputted at a plurality of working periods. The variable-pitch control circuit has the advantages of steady output of a control speed curve, rapid system response and high control precision and is mainly used for controlling the variable pitch of the wind generating set.