896results about How to "Good followability" patented technology

An electric power steering system is provided which is capable of providing a favorable steering feeling without using compensation logics such as of inertia compensation and friction compensation. The electric power steering system includes road-noise suppression control means (213) for controlling a steering assist motor (9) in a manner to damp torque transmission in a higher frequency region representing road noises than a frequency region representing road information. A friction value of a steering mechanism (A) is decreased enough to allow the intrinsic vibrations of the steering mechanism (A) to appear. Rotor inertia of the steering assist motor (9) is set to a value small enough to allow the frequencies of the intrinsic vibrations to be present in the frequency region where the torque transmission is damped by the road-noise suppression control means (213).

The invention discloses a method for implementing online tests of stream flow based on video images, and belongs to the technical field of non-contact open channel flow measurement. The method relates to a water flow tracing system, a water surface illuminating system, a video flow acquisition system, a camera calibrating system, an image processing system and a flow estimating system, trace particles are thrown in a flow measuring stream segment by the water flow tracing system, a camera shoots a water surface video stream, frames are extracted at fixed intervals and are processed digitally, the image processing system processes digital images according to ground control point coordinate information provided by the camera calibrating system, and finally, the stream flow is computed by the aid of the flow estimating system according to a flow rate and area method. By the aid of the method, complicity of stream flow measurement is reduced, simultaneously, high measurement precision can be guaranteed, and the stream flow can be dynamically monitored in extreme environments.

Pressure-sensitive adhesives for optical films exhibit high cohesion, excellent re-workability, adhesion properties, heat resistance and durability without chemical crosslinking.

A pressure-sensitive adhesive contains an acrylic triblock copolymer (I) at not less than 60% by mass based on the total mass of all solids contained in the pressure-sensitive adhesive, the acrylic triblock copolymer being represented by the formula A1-B-A2 wherein: A1 and A2 are each independently an alkyl methacrylate polymer block having Tg of not less than 100° C. and B is an acryl acrylate polymer block having Tg of not more than −20° C.; the content of the polymer block B is 50 to 95% by mass; Mw is in the range of 50,000 to 300,000; and the molecular weight distribution is in the range of 1.0 to 1.5. In a preferred embodiment, the acrylic triblock copolymer (I) is a combination of an acrylic triblock copolymer (Ia) having Mw of 50,000 to less than 100,000 and an acrylic triblock copolymer (Ib) having Mw of 100,000 to 300,000, in a mass ratio (Ia):(Ib) of 45:55 to 75:25.

A frame time having a certain period of time is divided into: a time period (for inter-base-station time division multiplex communication) in which one of the base stations has a transmission right in the simultaneous transmission and carries out inter-base-station time division multiplex communication so as to avoid interference between the base stations; and a time period (for inter-base-station simultaneous communication) for communication which is simultaneously carried out between the plurality of base stations. Furthermore, the time periods are switched for the communication.

The invention relates to a motor rotating-speed tracking control method based on a self-adaptive fuzzy neural network, wherein rotating-speed and current double closed-loop control is adopted, an outer ring is a rotating-speed ring, a sliding-mode control theory-based fuzzy neural-network controller (SMFNN) is designed, an inner ring is a current ring, and a PI (Proportional-Integral) controller is adopted; a fuzzy neural-network rotating-speed controller comprises two parts, wherein one part is a PID (Proportional-Integral-Derivative) controller, and the other part is the fuzzy neural network, online real-time learning is carried out through the fuzzy neural network by utilizing a parameter correcting method designed on the basis of the sliding-mode control theory, and the two parts jointly act to obtain the output ir of the rotating-speed controller, i.e. a difference obtained by subtracting the output iFNN of the fuzzy neural network from the output iPID of the PID controller is used as the output ir of the rotating-speed controller. The control precision and the anti-interference performance of a motor speed-adjusting system can be improved through the control strategy of the motor rotating-speed tracking control method.

The invention discloses a rotational speed and torque control method of a wind turbine generator set. Under the situation that the measured rotational speed of a power generator is higher than the rated rotational speed and the measured power exceeds the rated power, the torque is switched from a PI (proportional-integral) control way to a constant power control way; under the situation that the pitch angle is smaller than the optimal pitch angle and the measured rotational speed is lowered below the rated rotational speed, the toque is converted from the constant power control way to the PI control way; and the pitch angle is controlled in a PI control parameter non-linear adjustment way, and the pitch control is in an activated state within the whole normal working rotational speed range. According to the rotational speed and torque control method of the wind turbine generator set provided by the invention, the problem of greater fluctuation in the rotational speed caused by desynchrony of the two types of control can be avoided by changing control target points of two controllers in a transition region, the transition region is improved from the original points to a curve, the flexible switching of the control states is easier to realize, and the stability in operation of the unit and the power output of the unit can be ensured.

A main object of the present invention is to provide a combined oil ring capable of exhibiting a sufficient tension, having excellent oil scraping function and oil control function, even if a coil expander formed of a shape memory alloy is used. To achieve the above mentioned object, the present invention provides a combined oil ring comprising: an oil ring formed into cross-section substantially of an I-shape that two rails are connected at a columnar portion thereof; and a coil expander, which is placed in an inner peripheral groove formed on the inner side of a periphery of the columnar portion connecting the two rails of the oil ring, and which presses the oil ring radially outward, wherein the coil expander is formed of a shape memory alloy, and is formed of anomaly wire having rectangular cross sectional shape.

The invention discloses a constant speed cruise control system and a control method applied to a pure electric vehicle. The control system comprises an information acquisition processing module, a cruise state machine module and a cruise control module. The information acquisition processing module is responsible for identifying and processing cruise key signals and various signals. The cruise state machine module is responsible for taking the constant speed cruise key and some information of the vehicle as the signal input and outputting the vehicle demand signal through the transition condition and the limit condition of the state machine. The cruise control module is used for making the closed-loop control according to the constant speed cruise demand vehicle speed and the collected current vehicle speed, getting the acceleration or deceleration signal, and finally getting the constant speed cruise demand torque through conversion. The invention improves the controllability, the comfort and the safety of the vehicle. The invention can stably and effectively set cruise vehicle speed, and the response of the cruise vehicle speed is rapid. Smooth torque switching, stable speed; during cruising and decelerating, the energy can be recovered, the utilization rate of vehicle energy can be improved, and the driving range can be increased.

The invention provides a wearable lower limb power-assisting device and a control method thereof. The wearable lower limb power-assisting device comprises two sets of symmetric three-degree-of-freedom mechanisms. Each set of the three-degree-of-freedom mechanism comprises a sole fixing mechanism, an ankle joint mechanism, a shank aluminum plate, a knee joint mechanism, a thigh aluminum plate, a hip joint mechanism and a fixing support, wherein the sole fixing mechanism, the ankle joint mechanism, the shank aluminum plate, the knee joint mechanism, the thigh aluminum plate, the hip joint mechanism and the fixing support are sequentially connected from bottom to top. Each sole fixing mechanism is connected with a foot motion condition detection module, and each fixing support is provided with a power supply. The wearable lower limb power-assisting device is simple in structure, easy to control, good in following performance, large in motion range and accurate in positioning and have no limits on heights of persons, a limb on one side is controlled at three degrees of freedom, each degree of freedom is controlled through a direct-current motor, the lower limb power-assisting device can follow the lower limb of a person to carry out various motions, the wearable lower limb power-assisting device can be used for a power-assisting walking party and vice versa, the motions of the lower limb of the human body can be controlled through the lower limb power-assisting device, and the wearable lower limb power-assisting device can be used for rehabilitation treatment of the lower limb.

A positive photosensitive composition comprises: (A) a resin that has an acid decomposable repeating unit represented by formula (I) and increases its solubility in an alkali developer by action of an acid: (B) a compound generating an acid upon irradiation with actinic light or radiation; (C) a hydrophobic resin insoluble in an alkali developer and having at least either one of a fluorine atom and a silicon atom; and (D) a solvent,

The apparatus is equipped with vacuum laminating unit (2) furnished with a pair of heat discs (23,26) opposed to each other, at least one of these heat discs (23,26) capable of advancing forward and backward relative to the other. There is provided a laminating apparatus adapted to superimpose a film resin material on base material (8a) having at least one of its front and back surfaces furnished with unevenness on the uneven surface by the use of the vacuum laminating unit(2) to thereby form laminate (9), wherein elastic press plate (24(27)) brought into contact with the surface of the film resin material (8b) and pressing the same is disposed on the side of film resin material of the heat disc (23(26)) opposed to the film resin material. Accordingly, even when the unevenness interspace of the base material (8a) is minute, close follow of film resin layer on the base material (8a) can be attained so as to avoid any remaining of bubbles between the base material (8a) and the film resin layer.

The invention relates to an electronically controlled hydraulic power steering system and a multi-objective optimization method based on the system. The electronically controlled hydraulic power steering system comprises a steering mechanical unit, a steering valve opening degree adjusting unit, an oil pump adjusting unit and an electronic control unit (ECU). The problems that in a traditional electronically controlled hydraulic power steering system, steering assistance power can be changed only by changing the rotating speed of an oil pump drive motor, and the opening degree of a steering valve can be linearly adjusted only according to the corner of a steering wheel are solved. Meanwhile, multi-objective optimization is carried out on the electronically controlled hydraulic power steering system, steering road feelings, steering sensitivity and energy consumption are taken as objectives, based on a modified Memetic intelligence algorithm, optimization design is carried out on mechanical parameters and hydraulic system parameters of the electronically controlled hydraulic power steering system, and therefore the system has the good steering road feelings and steering sensitivity with smaller energy consumption.

The invention provides a lower limb exoskeleton robot system based on human-machine terminal interaction, and relates to a lower limb exoskeleton robot. The system solves the problems of poor adhesionbetween the lower limb exoskeleton and the human body, uncomfortable wearing, inaccurate human-computer interaction information, poor man-machine following effect and inconspicuous power assisting effect caused by the prior lower limb exoskeleton. A low part of that back frame is symmetrically provided with two hip joint bracket, one end of the hip joint support is rotatably connected with the back frame 1 through an adduction and abduction shaft, the free end of each hip joint bracket is rotatably connected to the corresponding hip joint through an internal and external hip rotation axis, Each hip joint is connected with a corresponding thigh rod through a hip flexion and extension shaft, an inertia unit is arranged at the upper part of each thigh rod, the lower part of each thigh rod isconnected with the upper end of the corresponding calf rod through a knee joint, one end of a pneumatic spring is connected with a back frame, and the other end of the pneumatic spring is connected with a corresponding hip joint bracket. The invention is used for a lower limb exoskeleton robot.

The invention discloses a mechanical dry gas sealing device for pumps. The mechanical dry gas sealing device comprises a movable ring component and a fixed ring component, wherein the movable ring component comprises a spring box (1), a stopper screw (2), a spring (3), a sealing ring (4), a pushing ring (5), a snap spring (6) and a movable ring (7), and the fixed ring component comprises a fixed ring (12), an anti-rotating pin (9), a sealing ring (11) and a gland (8). The mechanical dry gas sealing device is characterized in that the sliding sealing ring (4) is mounted in a seam allowance groove (50) on the inner diameter of the front end of the pushing ring (5), the pushing ring (5) is in close fit with the rear end face (70) of the movable ring (7), and compression rate of the O-shaped sliding sealing ring (4) ranges from 2% to 5%. A sealing end face of the movable ring (7) of a compensation ring is a conical surface. A boss (83) is arranged on the inner diameter of a vertical end face (82) mounting a seam allowance groove (80) of the fixed ring (12) and is matched with the inner diameter of the inner end face of the fixed ring (12) in a support manner. An end face of the compensation ring of the mechanical dry gas sealing device is good in adherence. Besides, the mechanical dry gas sealing device is stable to run, high in interference resistance, good in sealing performance and suitable for diversified working conditions.

The invention discloses a demanded power predication based variable-area optimal energy management control method and device, and belongs to the field of hybrid power off-road vehicle energy management. The method comprises the following steps: selecting longitudinal vehicle speed and longitudinal accelerated speed as predicating variables by designing a self-adaptive Markov chain forecasting method, thereby realizing indirect predication of demanded power; controlling the vehicle to work in two different drive modes by calculating and comparing equivalent energy consumption of a hybrid drivemode with that of a pure electric mode in real time; taking the equivalent fuel oil consumption minimum control strategy as developing basis, considering traveling working condition characteristics and demand characteristics of the off-road vehicle, performing real-time solving of an optimizing area according to a demand powder variable, and designing a variable-area equivalent fuel oil consumption minimum control strategy. The demanded powder predication method can improve demanded powder predication precision and self-adaption as well as power system response characteristics, reasonably switches a working mode, optimizes general energy consumption characteristics of the system, and improves travelling stability while guaranteeing working stability of the power system.

A shaving head (3) comprises at least one cutting unit (4) in which an external cutting member (5) which has a function in contacting skin to be subjected to a shaving action is arranged, and which is suspended relative to a holder (8) of the shaving head (3) through suspension means. In particular, the suspension means comprise at least two pivot constructions, wherein one pivot construction enables a member (9) of the suspension means to be pivotable relative to the holder (8), and wherein another pivot construction enables the external cutting member (5) to be pivotable relative to the suspension member (9) as mentioned. Furthermore, a pivoting stiffness of a connection of the latter pivot construction is lower than a pivoting stiffness of the first pivot construction. In this way, good contour following performance is obtained at two levels, in both relatively small and relatively large curvature changing areas.

A first domain satisfying a first condition concerning a current utterance understanding result and a second domain satisfying a second condition concerning a selection history are specified. For each of the first and second domains, indices representing reliability in consideration of the utterance understanding history, selection history, and utterance generation history are evaluated. Based on the evaluation results, one of the first, second, and third domains is selected as a current domain according to a selection rule.

The invention relates to a temperature difference-sediment coupling density flow simulation test system. The test system comprises a muddy water tank, a water pump, a heating device, a water channel, a turbine flowmeter, a plurality of thermographs and a circulating water pond; the water channel is connected with the water pump and the muddy water tank through a duct, the turbine flowmeter is connected with the duct, temperature probes of each thermograph are arranged at two vertical water temperature measurement positions of the side wall inside the water channel, and the heating device is installed above the water channel. The test system is simple in structure and convenient to operate; by the aid of the test system, the interference of the heating device to a flow field inside the water channel at the density flow test stage in the past is reduced, and the motion process of a sediment density flow in a temperature-layered water body is simulated successfully; special phenomena of advancing of the sediment density flow in the middle layer and the surface layer of the water channel under the influence of vertical water temperature laying are achieved, and in addition, the reliability and the accuracy of density flow analysis and research can be improved.

Provided is an oiling nozzle for a thrust bearing, capable of improving the following capability of pads, and achieving a higher bearing pressure of the thrust bearing. An oiling nozzle which is for use in a thrust bearing and is respectively arranged between pads disposed in positions facing the thrust surface of a thrust collar that protrudes radially outward from a rotor shaft, along the circumferential direction, wherein the oiling nozzle comprises: a cylindrical stem; and a rectangular-shaped mainframe whose heightwise middle portions of opposite lateral sides are provided with convex parts each presenting a semicircular disk shape in a plane view, to be fitted into concave parts that are formed in lateral sides of the pads, and whose top portion located on the side opposite to the stem is formed with a plurality of nozzle holes for ejecting lubricating oil that has been supplied from the bottom of the stem toward a space between the thrust collar and the pads.