JP2007179263A - Computing apparatus, simulation method thereof, and program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely shorten calculation time when simulating behavior of members. <P>SOLUTION: When calculation time is in a range of a time domain TJ, time in which difference between roller velocity V<SB>R</SB>and velocity V<SB>p</SB>at all material points of the members continue keeping a state where the difference is smaller than ε<SB>v</SB>is timed by updating stability determination counter every very small time period, and when the stability determination counter is the stability determination time (CT) or more, the calculation time is set to the end time of the extracted time domain without calculating physical quantity of the members. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a calculation apparatus, a simulation method therefor, and a program therefor, and more particularly, a calculation apparatus for numerically analyzing the behavior of a member made of a sheet-like flexible medium conveyed on a conveyance path in an apparatus such as a printer and the simulation thereof. The present invention relates to a method and a program thereof.

Conventionally, there is a simulation method for designing a conveyance path of a device having a mechanism for conveying a member including a sheet-like medium (flexible medium) such as a paper, a film, or the like such as a copying machine, an LBP (laser beam printer), or an ink jet printer. Are known. Specifically, a simulation method for designing a conveyance path by analyzing the behavior of a sheet-like member when the member is conveyed in the conveyance path of the apparatus by computer simulation is known (for example, a patent) Reference 1).
JP 2004-171426 A

  In the simulation method, it is desired to shorten the analysis time.

  An object of the present invention is to provide a calculation apparatus, a simulation method therefor, and a program therefor that can reliably reduce the calculation time when simulating the behavior of a member.

  In order to achieve the above object, according to a first aspect of the present invention, there is provided a calculation apparatus according to claim 1, wherein the calculation speed of the flexible medium conveyed by the conveyance drive unit is calculated for each minute time, and the driving speed of the conveyance drive unit is constant. A region extracting means for extracting a time region, and when a calculation time that is a calculation target of the motion state of the flexible medium is within the range of the extracted time region, the speed of the flexible medium and the transport drive unit A shape discriminating means for discriminating whether or not the flexible medium maintains a constant shape based on a difference from speed; and when the shape discriminating means determines that the flexible medium maintains a constant shape, the calculation time The calculation time is calculated from the end time of the extracted time domain without calculating the motion state of the flexible medium from the end time of the extracted time domain to the end time of the extracted time domain. And a controlling means for controlling to calculate the state.

  According to the present invention, the calculation time for simulating the behavior of a member can be reliably shortened.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a diagram schematically showing a configuration of a computer as a computing device according to the present embodiment.

  In FIG. 2, a computer 100 includes a hard disk A that stores a program 1A of the simulation method according to the present embodiment, and a memory B that is loaded with the program 1A at the time of startup. Further, the computer 100 reads the program 1A in the real memory B, and executes processing necessary for the detection of selection of buttons on the display screen of the display device E, which will be described later, detection of input of numerical values, and the like. And an input device C for inputting various parameters 2A such as a paper conveyance path, a conveyance condition by a roller, and a paper type. The computer 100 also includes a display device E that displays the shape of the simulation model as needed.

  In addition to the program 1A, the hard disk A stores physical property parameters that depend on the type of paper (flexible medium) required for calculation, paper thickness, density, stiffness, and friction coefficient with the guide. The hard disk A also stores a physical quantity output as a result of the calculation.

  The CPU D is a control unit that calls various parameters 2A input from the input device C as needed and uses them for calculation.

  The display device E displays the setting of the transport path input to the input device C and the paper layout numerically calculated by the CPU D as the shape of the simulation model. Thereby, the user can visually recognize the state of the simulation.

  Further, the display device E displays the physical quantity output as a result of the calculation as needed. Thereby, the user can visually recognize the behavior animation of the paper, and can quantitatively grasp the force, speed, acceleration, and position acting on the paper and the guide on the graph.

  FIG. 3 is a diagram showing a screen displayed on the display device E in FIG. 2 when shifting to the transport path definition function.

  In FIG. 3, a screen 300 includes a menu bar 1 for switching functions by pressing various buttons by the user, a sub-configuration menu 2 for each function, and a graphical screen 3 on which defined transport routes and results are displayed. . The screen 300 includes a command field 4 for outputting a program message and inputting a numerical value as necessary.

  The menu bar 1 includes buttons 1-0 to 1-4 for shifting to various functions. The button 1-1 is a button for shifting to the transport route definition function in response to detection of selection by the user. The button 1-2 is a button for shifting to the flexible medium model creation function in response to detection of selection by the user. The button 1-3 shifts to the transport condition setting function when pressed by the user. A button 1-0 is a button for shifting to a file processing function in response to detection of selection by the user. The button 1-4 is a button for shifting to a result display function according to detection of selection by the user.

  Further, the screen 300 displays definition buttons 2 </ b> A to 2 </ b> G in the sub-configuration menu 2 in response to detection of a user selection of the “transport route” button 1-1. The definition button 2A defines a pair of transport rollers composed of two rollers, and the definition button 2B defines a single transport roller composed of one roller. The definition button 2C defines a straight conveyance guide, and the definition button 2D defines an arc conveyance guide. The definition button 2E defines a conveyance guide with a spline curve, and the definition button 2F defines a flapper (point) that branches a path along which the flexible medium is conveyed. The definition button 2G defines a sensor that detects whether or not the flexible medium is at a predetermined position in the transport path. In the present embodiment, the transport roller, the transport guide, and the flapper are defined by the definition buttons 2A to 2G, but these definition buttons can be used as long as they define parts that constitute the transport path of an actual copying machine or printer. It is not limited.

  When the transport path is defined in response to detection of the selection of the definition buttons 2A to 2G by the user, the graphic screen 3 displays a screen that reflects the position shape of the defined transport path.

  Further, the screen 300 displays selection menus 2I to 2K in the sub-configuration menu 2 in response to the detection of the user's selection of the “medium definition” button 1-2.

  The selection menu 2I displays three input commands of a straight line, an arc, and a spline so that the user can select them. In the selection menu 2I, another input command such as freehand may be displayed. When one of the three input commands on the selection menu 2I is selected by the user, a message (FIG. 4) prompting the user to input coordinate values at both ends of the flexible medium is displayed in the command column 4.

  In the present embodiment, the coordinate values of both ends of the flexible medium are determined by inputting the coordinate values into the command field 4. However, the coordinate values of both ends of the flexible medium may be directly designated on the graphic screen 3 by a pointing device attached to the computer 100 such as a mouse.

  When the coordinate values of the both ends of the flexible medium are determined, a straight line (broken line) 22 connecting the ends 21 is drawn on the graphic screen 3. Thereby, the user can confirm how the flexible medium is installed in the conveyance path. In the present embodiment, as shown in FIG. 4, with respect to the roller pair and paper guide set in advance, one end 21 on the paper guide side and the roller pair 20 in a state of being sandwiched between the roller pair 20 are used. The other end portion 21 is disposed at the point beyond it.

The selection menu 2J displays the type of the flexible medium so that the user can select it. When one selection of the type displayed on the selection menu 2J is detected, data matching the characteristics specific to the medium is input by the input device C as one of the various parameters 2A. Specifically, information on Young's modulus, density, and thickness of the flexible medium, which are calculation parameters necessary for calculating the motion of the flexible medium in the conveyance path, is input. For example, when recycled paper A is selected as the type of flexible medium, the Young's modulus of the recycled paper A is 5409 Mpa, the density is 6.8 × 10 ⁻⁷ kg / mm ³ , and the paper thickness is 0.0951 mm. Is entered.

  In this embodiment, the selection menu 2J displays recycled paper A, recycled paper B, recycled paper C, plain paper A, plain paper B, plain paper C, and OHP as the types of flexible media that can be selected by the user. Has been. However, it is not limited to these types as long as it is a flexible medium that can be used as a member that is transported on the transport path. For example, a medium represented by a non-coated paper or a coated paper expression can be selected and displayed. It is also possible to display a medium represented by expressions such as thickness, basis weight, and product name.

  The selection menu 2K is an equal division, unequal division, automatic as an element division method for simulating the movement state of the flexible medium when the definition of the conveyance path and the position of the flexible medium in the conveyance path are determined. These three commands are displayed so as to be selectable by the user.

  When one of the three commands displayed on the selection menu 2K is selected by the user, a message prompting the user to input parameters necessary to define the method is displayed in the command column 4. For example, when an equal division command is selected, the command column 4 prompts the user to input the number of divisions or the division size when discretizing the flexible medium into a plurality of spring-mass systems, as shown in FIG. Is displayed.

In this embodiment, the flexible medium is defined by a straight line, and the number of divisions is 10. In this case, the mass points 23 are arranged so that the set end portions 21 are divided into ten. Note that the end portions 21 are also set as mass points. These mass points 23 (including the end 21) and the rotary spring 24 connecting them represent the bending stiffness when the flexible medium is regarded as an elastic body, and the translation spring 25 expresses the tensile stiffness. Both spring constants can be derived from elasticity theory. The rotation spring constant kr and the translation spring constant ks are given by the following equations (1-1) and (1-2) using the Young's modulus E, the width w, the paper thickness t, and the distance ΔL between the mass points.

The mass m of the mass point is calculated by the following equation (2), where the length L, width w, paper thickness t, density ρ, and division number n of the flexible medium.

m = Lwtρ / (n−1) (2)

With the above operation, the flexible medium is model-defined as an elastic body that responds to bending and pulling forces on the program.

  When selection of the “conveyance condition setting function” button 1-3 is detected on the screen 300 shown in FIG. 3, the sub-configuration menu 2 includes a drive control menu 2L, a friction coefficient setting menu 2M, and a drive as shown in FIG. The sequence input button 2N is displayed so as to be selectable by the user.

  The drive control menu 2 </ b> L displays components that can be driven and controlled among the components (rollers and flappers) that control the driving of the flexible medium in a user-configurable manner. For example, when a user selects a roller in the drive control menu 2L, the user setting of the drive control of the transport roller displayed on the graphic screen 3 can be performed.

  In the present embodiment, as shown in FIG. 6, since there is no flapper on the transport path, the flapper in the drive control menu 2L cannot be selected by the user.

  In addition, as long as the flexible medium such as paper can be conveyed, items other than the roller and the flapper may be displayed in the drive control menu 2L.

When selection of the drive sequence input button 2N is detected at the time when selection of the necessary rollers is completed, a condition input screen 700 as shown in FIG. In accordance with the definition method shown on the graphical screen 3, when the roller feed amount, feed speed, roller stop time, _Tstart , _Tend , and the number of repetitions are input as needed, the roller drive conditions are set.

For example, the feed amount is 20 mm, the feed speed is 100 mm / sec, the roller stop time is 0.2 seconds, T _start is 0.1 seconds, T _end is 0.1 seconds, and this sequence of 0.3 seconds is performed three times. When repeated roller driving conditions are input, the graph of FIG. By setting such roller driving conditions, it is possible to perform behavior simulation of members when intermittent paper feeding is performed as in an ink jet printer.

At this time, a comparison file (FIG. 9) in which data in the time domain TJ is written based on the roller driving conditions is created. The time region TJ is a time zone in which the roller driving acceleration is 0, that is, the ranges C ₁ , C ₂ and C _{3 in which the} roller driving speed shown in FIG. 11 is constant, and the roller driving is stopped (roller driving speed). Is 0) range S ₁ , S ₂ , S ₃ . In this region, it is determined whether or not the calculation omission routine flag is set to ON in step S34 of FIG.

  The friction coefficient setting menu 2M (FIG. 6) displays parts (rollers, guides) that cause friction with the flexible medium in a user-selectable manner. For example, when the user selects a roller in the friction coefficient setting menu 2M, a message prompting the user to input the value of the friction coefficient μ of the transport roller is displayed in the command column 4.

  When the normal force obtained by the contact calculation between the flexible material mass point 23 and the roller or guide is N, the frictional force μN acts in the direction opposite to the paper conveyance direction as shown in FIG. Is set as follows.

  FIG. 1 is a flowchart illustrating a procedure of calculation processing of the behavior (motion state) of a flexible medium executed by the computer 100. This process is a process of calculating the physical quantity of the flexible medium at the calculation time of the calculation target of the simulation and defining the shape of the flexible medium from the calculated physical quantity. This calculation time is set for each minute interval. The flowchart shown in FIG. 1 is executed by CPU D based on program 1A.

  First, in FIG. 1, it is determined whether or not the calculation time is within a time region TJ where the roller driving acceleration is zero (step S31). Specifically, this process reads the comparison file in FIG. 9 and determines whether or not the calculation time is included in the range of the time region TJ written in this file.

  As a result of the determination in step S31, when the calculation time is not within the time region TJ, the process proceeds to step S35, and when the calculation time is within the time region TJ, it is determined whether or not the roller drive is stopped. (Step S32). In the present embodiment, specifically, it is determined whether or not the calculation time is within any one of the ranges S1, S2, and S3 in FIG. As a result of the determination in step S32, when the roller drive is stopped, the calculation skip routine flag is turned ON (step S34), and the process proceeds to step S35. When the roller drive is not stopped, that is, the roller is driven at a constant level. If so, the process proceeds to step S33.

  In step S33, it is determined whether or not there is a mass point in contact with the guide. More specifically, this processing considers that there is a mass point that comes into contact with the guide when the position of all the mass points of the flexible medium and the position of the guide are within a certain range. If the result of this determination is that there is a mass point that is in contact, the calculation omission routine flag is turned ON if there is no mass point that is in contact with the guide (step S34), and the process proceeds to step S35. In the present embodiment, in step S33, there is a mass point that comes into contact with the guide when the condition that the distance between all the mass points and the guide is within 0.01 mm is satisfied.

  According to the processing in steps S31 to S34, the calculation omission routine flag is set to ON when the calculation time is within the time domain within which the shape of the flexible medium is highly likely to be maintained, and in steps S41 to S46 described later. Process. Thereby, calculation time can be shortened more reliably.

  In step S35, calculation of the motion state of the flexible medium after a minute time Δt seconds has elapsed from the calculation time is started.

  When this calculation process is started, first, the resultant force of the forces acting on each mass point constituting the flexible medium is calculated (step S36). Specifically, in this process, a resultant force of bending, tensile force, contact force, gravity, air resistance force, and Coulomb force acting on each mass point is calculated.

  Next, the force acting on each mass point defined in step S36 is divided by the mass of each mass point, and acceleration is calculated for each mass point after Δt seconds from the calculation time (step S37). Subsequently, the speed of each mass point after Δt seconds from the calculation time is calculated by time-integrating the calculated acceleration (step S38), and the calculated speed is time-integrated to obtain Δt from the calculation time. The displacement of each mass point after 2 seconds (step S39) is calculated. Here, Euler's time integration method is employed for calculation of acceleration, velocity, and displacement of each mass point Δt seconds after the calculation time (steps S37 to S39), but Kutta-merson, Newmark-β method, Willson Other time integration methods such as the -θ method may be adopted.

  Thereafter, the displacement, velocity, and acceleration of each mass point after Δt seconds from the calculation time are stored in the hard disk A as physical quantities of the flexible medium (step S40).

  Next, it is determined whether or not the calculation omission routine flag is ON (YES in step S41). If the flag is ON, whether or not the flexible medium maintains a constant shape within the time region TJ by steps S42 to S44 described later. A shape hold determination process is performed to determine whether or not. On the other hand, if it is not ON, the process proceeds to step S45a without performing this determination process, Δt seconds is added to the value of the calculation time, and the motion calculation from step S35 is repeated.

In this embodiment, the shape-retaining determining process computes the difference between the velocity V _P and the roller speed V _R of the total mass of the flexible medium after Δt seconds from the calculation time. At this time, when the difference is maintained a state of being smaller than epsilon _v stabilization determination time (CT) or, determining that the flexible medium is maintained constant shape between the current calculated time to the end time of the time domain TJ To do. The values of ε _v and stability determination time (CT) are values obtained experimentally and empirically. In this embodiment, the stability determination time (CT) is 0.01 seconds and ε _v is 10 mm / sec. Set.

  Note that the determination method of the shape retention determination process is not limited to the method of the present embodiment. For example, not only when the shape is completely constant, but also experimentally and empirically found that the variation in shape within a certain range is virtually unaffected or negligible. If so, the condition may be set so that the variation is in a certain range. Although the calculation result is rough, if rough data is to be obtained in a short time, the condition may be set so as to allow some deformation. In addition, a judgment condition setting function is provided so that the desired accuracy can be selected by the user so that the condition setting can be changed or the condition setting can be changed and adjusted manually. Also good.

  Hereinafter, the shape retention determination process will be specifically described.

First, in step S42, the difference between the velocity V _P of the mass points of the roller velocity V _R and the flexible medium is determined whether epsilon _v less. As a result of this determination, when the speed difference is greater than or equal to ε _v for all the mass points, the stability determination counter is turned ON, and the value of t ′ is set to 0 (step S46). Thereafter, Δt is added to the value of the calculation time (step S46a), and then the processing from step S35 is performed.

  Note that a step of determining whether or not the calculation time is within the range of the time region TJ may be inserted between steps S46a and S35. If the result of this determination is that the calculation time is within the time domain TJ, the process proceeds directly to step S35. However, when the time is not within the time domain TJ, the calculation time is within the time domain within which it is highly likely that the shape of the flexible medium is maintained. However, the shape could not be maintained. In this case, the calculation omission routine flag and the stability determination counter are turned OFF, and the processing from step S31 is performed.

If it is determined in step S42, when the speed difference is smaller than epsilon _v adds the Δt seconds the value of the stability determining counter t '(step S43), the process proceeds to step S44. Thus, when the difference between the velocity V _p of the total mass of the roller velocity V _R and the member persists remains epsilon _v smaller state, sequentially Δt seconds stability determination counter is added.

  In step S44, it is determined whether or not the value of the stability determination counter t 'is equal to or greater than the stability determination time CT. If the result of this determination is that the time is equal to or greater than the stability determination time CT, the process proceeds to step S47, and if it is less than the stability determination time CT, Δt seconds is added to the value of the calculation time (step S45a), Proceed to

  In step S45, it is determined whether or not the calculation time is equal to or greater than the calculation end time T. As a result of this determination, when the calculation end time T is equal to or longer than the calculation end time T, the present process is terminated, and when it is less than the calculation end time T, the process returns to step S31.

When it is determined at step S44, the stabilization determination time when it becomes more than CT is stored in the hard disk A physical quantity stored in step S40 as a physical quantity of a flexible medium period T _i from the current calculation time (step S47). Then, without periods of the driving speed of the roller constant from the current calculation time to calculate the motion state of the flexible medium until the calculated time to end, it updates the value of the calculated time to the T _i (step S47a). In the present embodiment, the time T _i refers to the times T ₁ , T ₂ , T ₃ , T ₄ , T ₅ , T ₆ in FIG. 11 when the constant roller driving speed period ends. For example, when the current calculation time is within the range S _1, the physical quantity of the flexible medium in the current calculation time from the period T ₂ together with are stored on the hard disk by the process, calculation time is updated to T ₂ The Thereby, when visualizing a calculation result with a moving image or a graph, the behavior of the member during the period when the physical quantity of the member was not calculated can be confirmed without missing.

  Thereafter, the calculation omission routine flag is turned off (step S48), the stability determination counter is turned off (step S49), and the process returns to step S31.

According to this process, calculation time is within the range of the time domain TJ (YES at step S31), the difference between the velocity V _p of the total mass of the roller velocity V _R and the member persists remains epsilon _v smaller state At this time, Δt seconds is added to the stability determination counter (steps S42, S46, S43). Thereafter, when the time measured by updating the stability determination counter is equal to or greater than the stability determination time (CT) (step S44), the calculation time is set to the end time of the extracted time region without calculating the physical quantity of the member. Set (step S48). Thereby, the calculation time at the time of simulating the behavior of a member can be shortened reliably.

  After the above processing is completed, the “result display” button 1-4 on the menu bar 1 of the screen displayed on the display device E can be selected by the user.

  The screen 300 displays the moving image menu 2O and the plot menu 2P in the sub-configuration menu 2 when the user presses the “result display” button 1-4.

  The moving picture menu 2O has a play button 51, a stop button 52, a pause button 53, a fast forward button 54, and a rewind button 55. When these buttons are pressed by the user, the behavior of the flexible medium is visualized on the graphic screen 3 as shown in FIG.

  In the flexible medium displayed on the graphic screen 3 in FIG. 13, each mass point is displayed so as to be selectable by the user, and when one of the mass points is selected by the user, the mass point is set as a mass point to be graphed. The

  The plot menu 2P displays various physical quantities (acceleration, speed, displacement, resistance) in a user-selectable manner when one of the mass points of the flexible medium displayed on the graphic screen 3 is selected by the user. When one of these physical quantities is selected by the user, the calculation result of any of the acceleration, velocity, displacement, and resistance of the mass point to be graphed is displayed as a time series graph on the graphic screen 3.

  For example, when “speed” displayed on the plot menu 2P is selected by the user, a time series graph regarding the speed of the mass point selected by the user is displayed on the graphic screen 3 as shown in FIG.

In FIG. 14, ranges C ₁ , C ₂ , C ₃ , S ₁ , S ₂ , and S ₃ indicate a range where the roller drive is constant and a range where the roller drive is stopped, as in FIG. In addition, the ranges C ₁₁ , C ₂₂ , C ₃₃ , S ₁₁ , S ₂₂ , and S ₃₃ are determined by the processes in steps S 41 to S 44 in FIG. 1 that the flexible medium maintains a certain shape within the time domain TJ. Indicates the time zone.

In this embodiment, the calculation of the behavior of the flexible medium in the ranges C ₁₁ , C ₂₂ , C ₃₃ , S ₁₁ , S ₂₂ , S ₃₃ is omitted by updating the calculation time in step S47a of FIG. In addition, the physical quantity of the flexible medium in these ranges is the one stored in step S47 in FIG. 1, that is, the calculation result immediately before interrupting the behavior calculation.

  In the present embodiment, the graph is displayed after the result is graphically displayed. However, if the mass point to be graphed can be set by the user, the graph can be directly displayed without graphic display. You may do it.

FIG. 15 is a diagram illustrating a calculation result of the displacement of the mass point at the paper leading end position in the range C ₁ (0.00 to 0.25 sec).

In this embodiment, the calculation time when he became 0.19Sec, the speed difference _{V P} of each the roller speed _{V R} mass in total mass of the flexible medium is less than 10 mm / sec. Further, this state is continuously maintained even when the calculation time has passed the stability determination time CT of 0.01 seconds, that is, when the calculation time has reached 0.20 sec.

Therefore, by updating the calculation time of the step S48 in FIG. 1, between the current calculated time from Delta] t (0.01 seconds) elapsed time (0.21Sec) to _T i (0.25 sec), for each Delta] t The momentum calculation at all mass points of the flexible medium to be executed is interrupted.

  On the other hand, the momentum calculated at the calculation time (0.20 sec) immediately before the momentum calculation is interrupted by the storage process in step S47 in FIG. 1 is saved as the momentum of the flexible medium during the interruption.

  Therefore, as shown in FIG. 15, during the interruption (0.21 sec to 0.25 sec), the displacement (x: 1.998, y) calculated at the calculation time of 0.20 sec as the displacement stored for each Δt. : -0.502) is stored.

  Thus, even if the behavior calculation is omitted, the calculation result can be output.

  Another object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and the computer of the system or apparatus (or CPU, MPU, or the like). Is also achieved by reading and executing the program code stored in the storage medium.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention. .

  Examples of the storage medium for supplying the program code include a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, and a DVD. An optical disc such as RW or DVD + RW, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used. Alternatively, the program code may be downloaded via a network.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (Operating System) running on the computer based on the instruction of the program code Includes a case where the functions of the above-described embodiments are realized by performing part or all of the actual processing.

  Furthermore, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the expanded function is based on the instruction of the program code. This includes a case where a CPU or the like provided on the expansion board or the expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

It is a flowchart which shows the procedure of the calculation process of the behavior of the flexible medium performed by computer. It is a figure which shows roughly the structure of the computer which performs the simulation method which concerns on this Embodiment. It is a figure which shows the screen displayed on the display apparatus in FIG. 1 when transfering to a conveyance path | route definition function. It is a figure which shows the screen displayed on a display apparatus, when it transfers to a medium definition function. It is a figure which shows the modification of the screen of FIG. It is a figure which shows the screen displayed on a display apparatus, when it transfers to a conveyance condition setting function. It is a figure which shows the modification of the screen of FIG. It is a figure which shows the other modification of the screen of FIG. FIG. 9 is a diagram illustrating an example of a comparison file in which roller driving is stopped or a certain time period is extracted under the driving conditions of FIG. 8. It is a figure used for demonstrating the friction coefficient in each mass point of a flexible medium. It is a figure which shows the state of the roller drive in the conveyance conditions set by the user on the screen of FIG. It is a figure used for demonstrating the process of step S42-S44 of FIG. It is a figure which shows the screen displayed on a display apparatus when transfering to a result display function. It is a figure which shows the modification of the screen of FIG. It is a figure which shows the calculation result of the displacement of the mass point of the paper front-end | tip position in the range C1 (0.00-0.25 sec).

Explanation of symbols

A Hard disk B Memory C Input device D CPU
E Display device 1 Menu bar 2 Sub-configuration menu 3 Graphic screen 4 Command field

Claims (3)

In the calculation device that calculates the movement state for each minute time of the flexible medium conveyed by the conveyance drive unit,
A region extracting means for extracting a time region in which the driving speed of the transport driving unit is constant;
When the calculation time, which is the calculation target of the motion state of the flexible medium, is within the extracted time domain, the flexible medium has a certain shape based on the difference between the speed of the flexible medium and the speed of the transport driving unit. Shape determining means for determining whether or not
When it is determined by the shape determining means that the flexible medium maintains a certain shape, the calculation is performed without calculating the motion state of the flexible medium from the calculation time to the end time of the extracted time domain. And a control means for controlling the time so as to calculate the motion state of the flexible medium from the end time of the extracted time domain. In the simulation method of the calculation device for calculating the movement state of each flexible medium conveyed by the conveyance drive unit for each minute time,
A region extraction step in which the control unit extracts a time region in which the driving speed of the transport drive unit is constant;
When the calculation time, which is a calculation target of the motion state of the flexible medium, is within the extracted time region, the flexible medium has a fixed shape based on the difference between the speed of the flexible medium and the speed of the transport driving unit. A shape determination step in which the control unit determines whether or not
When it is determined in the shape determination step that the member has a certain shape, the calculation time is calculated without calculating the motion state of the flexible medium from the calculation time to the end time of the extracted time region. And a control step in which the control unit controls so as to calculate the motion state of the flexible medium from the end time of the extracted time domain.   A program for executing the simulation method according to claim 2.

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