487results about How to "Less freedom" patented technology

The invention relates to a free 6-UPS three-linkage parallel robot, belonging to the robot and mechanical producing area. The invention is characterized in that: three couples of straight driving branches are arranged in symmetry right triangle between the upper platform (1) and the base (2), while each couple comprises: two same SPU synchronous flexible driving branch while the upper end of each branch has a ball couple, the middle has a moving couple and the lower end has a universal couple connected to the base (2); the moving couple is formed by a mechanical or hydraulic synchronous flexible driver; the distance between two ball couples of each couple of straight driving branch is the same as the distance between two universal couple vertical axles (9). The invention is characterized in less freedom, easy control, large working space, simple structure and high accuracy. The invention can be used in large radio telescope, three-dimensional measure and sensor, etc.

A technique of acquiring a width obtaining an appropriate exposure with minimum restrictions, while accurately correcting flickering is provided. An exposure control method includes integrating a video signal obtained by shooting a subject by means of a CMOS imaging element as input video signal over not less than a horizontal period, normalizing the integral value or the difference value of the integral value between neighboring fields or frames, extracting the integral value or the difference value after the normalization as flicker spectrum, determining, based on the extracted flicker spectrum, the presence or absence of a flicker component contained in the video signal obtained by the imaging element and controlling the exposure value, using a program diagram for preferentially employing the shutter speed less liable to produce flickering when it is determined that the video signal contains a flicker component.

An electromechanical VVA system for controlling the poppet valves in the cylinder head of an internal combustion engine. The system varies valve lift, duration, and phasing in a dependent manner for one or more banks of engine valves. A rocker subassembly for each valve or valve pair is pivotably disposed on a control shaft between the camshaft and the roller finger follower. The control shaft may be displaced about a pivot axis outside the control shaft to change the angular relationship of the rocker subassembly to the camshaft, thus changing the valve opening, closing, and lift. A plurality of control shafts for controlling all valvetrains in an engine bank defines a control shaft assembly. The angular positions of the individual control shafts may be tuned to optimize the valve timing of each cylinder. The system is applicable to the intake and exhaust camshafts of diesel and gasoline engines.

A bionic robot under-driven flexible hand device belongs to the technical field of anthropomorphic robot, and mainly comprises a thumb, a forefinger, a middle finger, a ring finger, a little finger and a palm. The device is provided with five independently controller fingers and fifteen joint freedoms, and is controlled by ten motors. The structures of four fingers (the forefinger, the middle finger, the ring finger and the little finger) are same. The variable initial configuration of finger and special effect of partial-coupling self-adapting grasping are realized through double motors, a transmission mechanism, a flexible component and reed component. The four fingers bend the second middle finger segment before grasping an object and the bottom finger segment bends for obtaining an excellent grasping preparing gesture. The robot hand is closer to man hand. The device of the invention has the advantages of compact structure, high integrity, external appearance, dimension and shape closer to man hand, capability for stably grasping and automatically adopting for objects with different shapes and dimensions. The device of the invention is used for anthropomorphic robot.

The invention provides a wafer pre-alignment method, which comprises the following steps of: calculating shape center position coordinates of a wafer, radial displacement maximum offset emax and an included angle of a radial displacement maximum offset part and horizontal Y direction by using a high-accuracy laser transmitting sensor according to one-circumference data of the edge of the wafer; driving the wafer to rotate at an angle so as to position the radial displacement maximum offset emax and the horizontal Y direction on a straight line, thereby finishing shape center positioning of the wafer; and accurately positioning a notch of the wafer according to a shape center algorithm. According to the wafer pre-alignment method, the edge of the wafer is detected by using a light transmitting sensor, and the positions of a shape center and the notch of the wafer are determined by using the shape center algorithm, so that the accuracy of the positioning method is effectively improved, the time and the space occupied by a pre-alignment are reduced, and the cost is reduced.

The invention discloses a gripper which adopts a connecting rod for transmission and has wide range as well as heavy load, comprising a transmission box body, a plurality of finger parts used for grasping articles and a flange used for being connected with a robot; each finger part comprises two finger rods, wherein the first finger rod adopts a gear wheel for driving, and a second finger rod adopts a connecting rod for driving; articles with different diameters can be gripped in an circular enveloping way through the linkage of all finger parts and the finger rods thereof. The gripper is driven only by one motor and adopts a synchronous belt and a gear set which are both positioned inside the box body in the transmission from the motor to the finger rods in the transmission box body. Thegripper has the advantages of more contact points of grasped articles, heavy load, high grasping stability, high reliability, and the like.

The invention discloses semiconductor material growing equipment, and in particular relates to a Czochralski crystal growing furnace for semiconductor single crystal growth. In the invention, the downward motion of a heat shield is used to replace the upward motion of a crucible, so that the crucible can only rotate and not ascend any more, thus, one degree of freedom is reduced and the system complexity is decreased; by adopting dual heaters respectively located at the bottom and the side face of the crucible respectively to control the growth of a crystal by aiming at different stages respectively, the temperature gradient control of the crystal and melt is more convenient; the relative positions between the crucible and the heaters are kept parallel and unchanged, and the heat radiation of the heaters is directly used for baking the crucible, so that the heat transfer efficiency is greatly improved in comparison with that in a traditional method in which the crucible in the traditional single crystal furnace is constantly away from a heating zone; and a flow guiding cylinder is used for guiding argon gas to carry out enhanced heat exchange on the crystal, so that an convection vortex of the argon gas above the melt is inhibited, thus, impurities and micro-defects in the crystal are favorably reduced and the consumption level of the argon gas is decreased.

The invention discloses a vibration modeling and analyzing method of a crack impeller structure of a centrifugal compressor. The vibration modeling and analyzing method comprises the steps of firstly, providing a modeling method of a centrifugal impeller, obtaining a whole model by rotating and converting a finite element model of a section of the impeller, reducing the DOF (Degree of Freedom) of a system by adopting a hybrid interface modal synthesis method, and simulating a breath effect of a crack by defining a contact mode on a crack interface; secondly, providing a method for solving large-scale symmetrical sparse matrix-inverse matrix, and thus obviously reducing the memory space needed by calculation; finally, providing a method for carrying out statistical analysis on resonant frequency of the crack impeller structure, considering dissonant factors such as manufacturing error and state degradation which exist in an actual impeller, and obtaining statistical regularity of structure resonant frequency under a random dissonant mode. According to the vibration modeling and analyzing method disclosed by the invention, the calculating accuracy is ensured, obvious improvement effect of calculating efficiency is realized at the same time, and a high-efficiency analyzing method is provided for optimal design of the impeller and quantitative diagnosis of the crack.

The invention relates to an adjustable six-freedom-degree human body head massaging health care robot which comprises a support and a massaging head hood installed below the support. The support comprises a transverse board, a supporting rod, a bottom disc seat, a front-back moving mechanism, a left-right moving mechanism, a lifting electric push rod, a rotary motor and a connector. The robot moves flexibly, multiple freedom degrees of motion are achieved, the robot makes full contact with the head, both the moving speed and the rotating speed can be adjusted, the robot can be used by people at different ages, the application range is wide, and therefore the massaging function of the robot is improved. The problems that an existing head massaging device cannot completely massage the head portion, the vibration frequency of vibration massage performed on the head by the adoption of the vibration principle of a vibration rod or a vibration motor cannot be adjusted, and the vibration rod or the vibration motor is not suitable for being used for a long time are solved. A shell is in a helmet manner, is easily matched with the head of the human body and is convenient to take and convenient and quick to use. The size of the shell is adjustable and the robot is suitable for being used by people with different sizes of heads.

An electromechanical VVA system for controlling the poppet valves in the cylinder head of an internal combustion engine. The system varies valve lift, duration, and phasing in a dependent manner for one or more banks of engine valves. A rocker subassembly for each valve is pivotably disposed in roller bearings on a rocker pivot shaft between the camshaft and a roller follower. A control shaft supports the rocker pivot shaft for controlling a plurality of rocker subassemblies mounted in roller bearings for a plurality of engine cylinders. The control shaft rotates about its axis to displace the rocker pivot shaft and change the angular relationship of the rocker subassembly to the camshaft, thus changing the valve opening, closing, lift and duration. An actuator attached to the control shaft includes a worm gear drive for positively rotating the control shaft.

The invention discloses a modular active joint type biped walking robot with six degrees of freedom. The robot consists essentially of six joint modules and two circular feet. Each joint module has a rotating freedom degree and is driven by a DC servo motor. The joint modules have two types, joint rotating shafts thereof are respectively parallel and vertical to the axis of a joint connecting rod and respectively called as I type or T type. All the modules are sequentially connected in series, and the sequence is as follows: foot-the I type joint-the T type joint-the T type joint-the T type joint-the T type joint-the I type joint- the foot. The rotating shafts of the four T type joints in the middle are parallel to each other, and vertical to the rotating shafts of the I type joints at the two ends. The robot has a plurality of walking models, including twist gait, transverse gait and flip gait. The robot is characterized by few freedom degrees, active walking, simple structure and control, good adaptability to the environment, strong obstacle-climbing capability, low energy consumption and the like. The robot can be widely used for operations such as carrying, detection, disaster relief and the like.

The invention discloses a humanoid dexterous hand with a variable-shape palm, which comprises the palm and three-five fingers connected with the palm, wherein the palm is constituted by a closed spherical five-connecting rod mechanism formed by sequentially connecting a palm arm connecting rod, a palm connecting rod I, a palm connecting rod II, a palm connecting rod III and a palm connecting rod IV; and each finger comprises a finger base, a finger base connecting rod, a finger intermediate connecting rod and a finger tail end, in each finger, the adjacent ends of the finger intermediate connecting rod and the finger tail end are sequentially connected by rotation through a rotating shaft, the finger base is fixedly connected on the connecting rod for constituting the palm, three rotatingshafts on each finger are connected with a rotary driving device, and the finger base connecting rod, the finger intermediate connecting rod and the finger tail end can rotate around the respective rotating shaft lines of the three rotating shafts under the drive of the rotary driving device. The humanoid dexterous hand comprises the palm in variable degrees of freedom and shapes; furthermore, the structure is simple and the volume is small.

The invention discloses a measurement method for determining a position of a crane hook, which comprises the following steps of: 1, during the filling, ensuring that a folding cylinder only takes a working condition, locking a piston rod of the folding cylinder firmly after extending to the farthest place, finally enabling a folding arm, the folding cylinder and a telescopic arm to form a rigid body; 2, establishing a sphere coordinate system with a hinge point center of the folding arm and a rotary table as a coordinate origin O, wherein the connecting line of the coordinate origin O and thecenter point C of a fixed pulley of the crane hook is a coordinate radius phi, and regulating the telescopic direction of the telescopic arm to ensure that the telescopic arm is parallel to the coordinate radius phi, wherein the state is an initial zero state of an ejector arm of the crane; and 3, during the work, always ensuring that the telescopic direction of the telescopic arm is parallel to the coordinate radius phi, measuring the length variable value delta L of the telescopic arm, the length variable value delta h of a steel rope, the amplitude angle variable value delta alpha of the folding arm and the rotary angle theta of the rotary table by using a sensor to obtain the position of the crane hook. The invention reduces the parameters required for determining the position.

Provided is a rotatable multiple-connecting-rod controllable excavating mechanism having a metamorphic function. One end of a second driving part of the excavating mechanism is connected to a machine frame through an eighth rotating pair, the other end of the second driving part is connected with one end of a third connecting rod through a ninth rotating pair, the other end of the third connecting rod is connected with one end of a second connecting rod through a tenth rotating pair, and the other end of the second connecting rod is connected to a bucket through an eleventh rotating pair. One end of the first driving part is connected to the other end of the machine frame and connected with one end of a bucket rod, and the other end of the bucket rod is connected to the bucket. One end of a large arm is connected to the machine frame through a first rotating pair, the other end of the large arm is connected with one end of a first connecting rod through a second rotating pair, the other end of the first connecting rod is connected with the second connecting rod through a third rotating pair, and the other end of the second connecting rod is connected to the third connecting rod through a fourth rotating pair. The rotatable multiple-connecting-rod controllable excavating mechanism utilizes connecting rod transmission to replace hydraulic transmission, and the shortcomings of high maintenance cost, high hydraulic element cost, large operation noise and the like of a traditional excavating machine are overcome.

The invention discloses a dynamics modeling and analyzing method for an aerospace vehicle and belongs to the technical field of flight dynamics modeling and simulation analysis of aircrafts. According to the dynamics modeling and analyzing method, the variable-span and variable-sweepback aerospace vehicle is simplified and is composed of a fuselage, a left wing inner side, a left wing outer side, a right wing inner side and a right wing outer side, wherein the fuselage, the left wing inner side, the left wing outer side, the right wing inner side and the right wing outer side are independent rigid bodies. The deformation movement of wings relative to the fuselage is represented through a set of constraint equations, so that the freedom degree of a dynamics model is reduced; the aerodynamic force exerted on the aerospace vehicle is simplified to act on the fuselage only, and the dynamics model is established through the Kane method; related items derived from the deformation movement are extracted from the dynamics model to form additional force and additional force moment so that the influence on the dynamics characteristics of the aerospace vehicle by the inertia force and inertia moment caused by the deformation moment can be represented. The dynamics model of the aerospace vehicle is simplified through the dynamics modeling and analyzing method, and integral items and derivation terms of the inertia moment do not appear in the equations. In this way, dynamics modeling and simulating can be easily performed on the aerospace vehicle, and meanwhile accuracy is high.

The invention discloses a PID controller design method. A control model of a PID controller is C(s)=Kp(1+K / S<lambda>+K<D>S) in which K<D>=aK, u=blambda, and a and b represent proportional coefficients respectively, and the control model of the PID controller is reset as C(s)=Kp(1+K / S<lambda>+ aKS<blambda>). A transfer function of a controlled object in the control system is set as G(s)=K / (S<3>+tau1S<2>+tau2S). According to the method, the cutoff frequency omegac and phase margin phim are selected; an optimal proportion model of model parameters is controlled according to the fractional order PID controller, and values of the proportional coefficients a and b are obtained according to the cutoff frequency omegac and phase margin phim; amplitude information and phase information of the transfer function in the cutoff frequency omegac are calculated; two equations related to the integral gain KI and the fractional order lambda are listed; the integral gain KI and the fractional order lambda are solved; a differential gain KD and a fractional order u are solved; and the proportional gain KP is calculated. The proportional relation between the integral gain KI and the differential gain KD of the fractional order PID controller as well as the proportional relation between the integral order lambda and the differential order u are established, the freedom degree of parameters of the fractional order PID controller is reduded, and the difficulty in parameter setting is reduced.

The present invention provides an aero-engine simulation test bed on the basis of a birotor simplified dynamic model design. A rotor system is the core structure of an aircraft engine, and the birotor structure is the main structure employed by the modern aircraft engine. The aero-engine simulation test bed comprises a test bed frame, and the frame is configured to support a low pressure rotating shaft (1) and a high pressure rotating shaft (2) sleeved at the outside of the low pressure rotating shaft through a 6-piont supporting structure; the high pressure rotating shaft is supported through adoption of a 1-0-1 bearing distribution mode, and the low pressure rotating shaft is supported through adoption of 1-2-1 bearing distribution mode; and the bearing of connecting one end of the high pressure rotating shaft with the low pressure rotating shaft is an inter-shaft bearing (3). For the design of the rotors of the model, a complex discrete dynamic model with multiple wheel discs is established through adoption of the finite element method, and then the model is simplified based on the centroid concentration method. The present invention is used for an aero-engine simulation test bed on the basis of a birotor simplified dynamic model design.

The method relates to a method for designing an antenna by improving the side lobe characteristics of an array wave beam directivity diagram, belonging to the technical field of array antennae. The method comprises the following steps of: setting an expected response directivity diagram A; under the unrestraint condition, determining a array wave directivity diagram B according to a minimum mean square error criterion; selecting a side lobe S to be optimized to determine an interval Omega; under the condition of taking a principle that the directivity diagram amplitude at a k equal division point is zero in the Omega as a constrict condition, calculating an optimal weighting vector Wopt(k) of an array, approaching to the directivity diagram A, according to the minimum mean square error criterion under the corresponding constraint condition to obtain a directivity diagram Ck, and searching the peak value p1(k) and a peak value p2(k) of side lobes at the left side and the right side of the k equal division point in the Ck; and marking Mr (k)=max{pr2(k), pr1 (k)}, searching a maximum value Mr (krm) in all Mr(k), determining the corresponding Wopt (krm) and a wave beam directivity diagram D, and carrying out array antenna design according to the Wopt (krm) and D. The method disclosed by the invention is used for designing the array antenna by improving the characteristics of the side lobes at the single side or both sides without carrying out hardware improvement on the original array and has the advantages of good flexibility, low cost and good effect.

The invention discloses a space time code three-dimensional self-adaptation clutter cancelling method for onboard multiple input multiple output (MIMO) radar. The method includes first building an onboard MIMO radar echo signal model, calculating residue echo signal energy, minimizing the echo signal energy to obtain a self-adaptation clutter canceller coefficient compensation device, acquiring a space time code three-dimensional self-adaptation clutter canceller through sliding window arrangement, utilizing the canceller to cancel echo signals and cancelling most clutter through preprocessing of the space time code three-dimensional self-adaptation clutter canceller. The method is used before a common space time code processing method and a dimension reducing STAP method to conduct space time code three-dimensional canceling on the clutter in the onboard MIMO radar echo signals, the clutter can be effectively restrained in the first stage of radar signal processing, and detection performance of a moving target is improved. The method is applicable to both positive side looking radars and non-positive side looking radars, and has good moving target detection capability.

The invention relates to an integrated platform of a deep sea bare rock pier guard barrel, a guide pile and an underwater cofferdam and a construction method thereof. The structure of the integrated platform is as follows: the steel guard barrel and a steel sleeve are connected into a whole; the guard pile is inserted into the steel sleeve; side plates of the cofferdam are arranged along the outer ring at the bottom of the platform to form a closed bin body which is divided into a plurality of small bins; bottoming concrete is filled into each small bin; and bin baffle plates are supported on trusses of the side plates of the cofferdam. The construction method comprises the following working procedures of manufacture of the platform, lifting and conveying, descending, leak stoppage, pouring of bottoming concrete, tapped arrangement and so on. The construction method meets the requirements of construction of a bridge foundation of a bare rock pier of a bridge spanning the sea, and the requirement of the steel protective barrel and the guard pile on the pile stabilizing depth, is safe and stable to construct the prior guard pile platform, improves the construction efficiency due to overall assembly of the platform, controls the verticality and the horizontal deviation of the platform, has high construction precision, avoids overall stability of the platform and leakage stoppage of a bottom opening of the protective barrel, and provides convenient conditions and technological guarantee for bridge construction in sea areas with severe construction conditions.

A latch system includes a latch and a key barrel operably coupled via a clutch to the latch. The clutch has an engaged condition where operation of the key barrel unlatches the latch, and the clutch has a disengaged condition where operation of the key barrel does not unlatch the latch.

The invention discloses a method for indirectly measuring the deformation of an antenna structure based on strain sensors. The method comprises the following steps: (1) sorting alternative modals based on a modal coordinate evaluation vector and according to the participation deformation degree, and obtaining a minimum complete modal set capable of describing the deformation of an antenna structure according to the linear correlation between deformation vectors before and after modal deletion; (2) adopting an effective independence method to carry out sensor arrangement, and deleting the degree of freedom with minimum contribution to the independence of a target modal until the remaining number of degree of freedom is the same with the number of the sensors; (3) calculating a mapping matrix with the use of numerical simulation and measured data according to the linear relationship between the displacement and strain of the antenna structure under the condition of small deformation; and (4) using the sensors arranged in specified positions to measure the displacement, obtained through the mapping matrix after strain of the antenna structure, of the antenna structure according to the corresponding relationship between strain and displacement. By the adoption of the method of the invention, the deformation of an antenna can be indirectly measured by strain sensors, and the method has the advantages of small amount of calculation, high computing speed and high real-time performance.

The invention provides a sunflower type solid antenna capable of being spread. The sunflower type solid antenna capable of being spread aims at resolving the problems that mesh type and inflatable antenna molded surfaces are not high in precision and limited in working frequency at preset. According to the sunflower type solid antenna capable of being spread, a regular dodecagon plate body serves as a base, six driving shafts and six universal shafts are arranged in a staggered mode along the edge of the base, each driving shaft is connected with a corresponding edge on the base through the corresponding driving shaft support, the two ends of each driving shaft are respectively connected with one end of an adjacent universal shaft, each driving shaft is connected with the lower end of a main spherical shell, the other side of each auxiliary spherical shell is connected with the other side of an adjacent auxiliary spherical shell through a spherical hinge mechanism, the middle of each universal shaft is connected with the lower end of a connecting rod, and the upper end of each connecting rod is connected with the corresponding spherical hinge mechanism. The sunflower type solid antenna capable of being spread is used for the field of antennas.

The invention discloses a three-finger three-degree-of-freedom configuration robot gripper, and belongs to the technical field of robots. The robot gripper is a robot gripper between a dexterous gripper and a single-degree-of-freedom holder, and can grip objects in different shapes and sizes. The bottom of a first finger is fixed to the upper surface of a palm cover plate; the bottom of a second finger is arranged in a housing and is rotationally connected with the palm cover plate; the bottom of a third finger is arranged in the housing and is rotationally connected with the palm cover plate; three finger base joint synchronous bending mechanisms, three finger tail end joint synchronous bending mechanisms, the second finger and the third finger are coupled to an opposite-direction rotating mechanism relative to a palm and are arranged in the housing; the three finger base joint synchronous bending mechanisms drive base joints of the three fingers to synchronously bend and rotate through base joint tendon sheath driving mechanisms of the three fingers; and the three finger tail end joint synchronous bending mechanisms drive tail end joints of the three fingers to synchronously bend and rotate through tail end joint tendon sheath driving mechanisms of the three fingers. The three-finger three-degree-of-freedom configuration robot gripper is used to grip the objects.

The invention provides a synchronous unfolding-folding space extend arm of a triangular prism based on centripetal mechanisms, which belongs to technical field of aerospace science and formed by series connection of a plurality of triangular prism centripetal mechanisms. Each triangular prism centripetal mechanism is composed of 3 central connection components, 6 angular point connection components and 12 rod-shaped joint shafts with the same length. The central connection components are provided with cross-shaped bracket structures, each supporting end of the cross-shaped bracket structures is fixedly connected with one joint shaft through a pair of parallel bevel gears, the angular point connection components are V-shaped bracket structures, each angular point connection component is provided with two open supporting ends, and the edge of each supporting end is coaxially connected with one bevel gear through a revolving shaft. The synchronous unfolding-folding space extend arm of the triangular prism based on centripetal mechanisms is small in freedom degree, capable of being unfolded and folded synchronously, good in reliability, high in repeatability, good in structural rigidity, convenient to structure combination and simple in movement mechanism control.

Provided is a loading machine with the active metamorphic function. A bucket turnover mechanism of the loading machine is composed of a bucket and a turnover mechanism. The bucket is connected to a big arm through a ninth rotation pair and a tenth rotation pair which are coaxial. The turnover mechanism is composed of a driving piece, a first connecting rod, a second connecting rod and a third connecting rod. One end of the driving piece is connected to a machine frame, the other end of the driving piece is connected with the first connecting rod. the other end of the first connecting rod is connected to the second connecting rod, the other two ends of the second connecting rod are connected with the bucket and the third connecting rod respectively, the third connecting rod is connected with the big arm, a locking device is installed on a rotation pair, and the active metamorphic function is achieved by locking the rotation pair. The loading machine with the active metamorphic function overcomes the shortcomings that a hydraulic system of a hydraulic loading machine is complex, the requirement for machining accuracy is high and oil leakage occurs easily, can achieve active metamorphosis according to different operating conditions, not only has the flexibility of the hydraulic loading machine, but also can achieve the loading operations of two degrees of freedom, and is applicable to manufacturing various loading machines and other engineering machines.

The invention discloses a rolling robot which comprises first and second cross-shaped components (1-1, 1-2), first to fourth connecting rods (3-1, 3-2, 3-3, 3-4), first to eighth joint crosses (4-1, 4-2, 4-3, 4-4, 4-5, 4-6, 4-7, 4-8) and first and second driving motors (2-1, 2-2). The first and second cross-shaped components (1-1, 1-2) are connected with the first to fourth connecting rods (3-1, 3-2, 3-3, 3-4) through the first to eighth joint crosses (4-1, 4-2, 4-3, 4-4, 4-5, 4-6, 4-7, 4-8). The first and second driving motors (2-1, 2-2) are respectively arranged on the first and second cross-shaped components (1-1, 1-2). The formed rolling robot can realize rolling in the random direction in the plane by utilizing inertia and can be used for application such as planetary exploration, military reconnaissance and the like.

The invention relates to a profile redesigning method of an automobile covering part die based on a T spline and belongs to the technical field of automobile covering part die design. The profile redesigning method comprises the steps that firstly, an automobile covering part digital model S0 is transformed into a single sheet T spline surface S1 on any topological structure; secondly, a single sheet T spline surface S2 for expressing rebound deformation is obtained with an isogeometric analysis method; thirdly, a single sheet T spline surface S3 for expressing rebound compensation is obtained with the isogeometric analysis method; lastly, the S3 is transformed into an automobile covering part die profile S4 compatible with the international standard. According to the profile redesigning method of the automobile covering part die based on the T spline, the T spline serves as a carrier of the redesign of the profile of an automobile covering part die, isogeometric analysis serves as the means, and the design result can be used for parameterization of the design flow of the automobile covering part die. In addition, the isogeometric analysis method of rebound calculation and compensation based on a T spline primary function is adopted, and thus the degree of freedom of massive numerical calculation is greatly reduced.

This portable apparatus includes a first housing having a printed board module, a second housing coupled at one end thereof with the first housing via a hinge mechanism and having a printed board module, a flexible flat cable connected at one end thereof with the printed board module in the first housing and at the other end thereof with the printed board module in the second housing, while being at least once curled at a position corresponding to the hinge mechanism, and an insert member to be inserted into the curled portion of the flexible flat cable. This insert member is not fixed to either the first housing or the second housing but the movement thereof is restricted. The present invention relates to a portable apparatus such as a mobile phone or a notebook type personal computer, an object of which is to improve the durability of a flexible flat cable without lowering the degree of freedom of a curled portion thereof and prevent the same from being locally worn.