JP2002183241A - System for supporting construction machine design - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine design support system for presenting all parameter combination ideas satisfying a plurality of requested performance so that a designer can select an optimum idea. SOLUTION: This design support system is provided with an inputting means 1 for inputting a plurality of target exponents representing a plurality of pieces of target performance, the allowable ranges of the respective target exponents, changeable parameters to realize the target performance and the variable ranges of the respective parameters, a storing means 2 for storing contents inputted by the inputting means, a simulating means 3 for performing the simulation calculation of the operation of the construction machine on the basis of the parameters stored in the storing means, a searching means 4 for calculating a parameter combination in which the value of the target exponent calculated by the simulating means is within the allowable range, and a displaying means 6 for displaying parameter combination results calculated by the searching means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a construction machine design support system, and more particularly, to a construction machine design support system that provides a designer with a combination of parameters satisfying a plurality of target performances.

[0002]

2. Description of the Related Art In order to design a construction machine, various parameters such as work performance, operation performance, ride comfort, durability performance, maintenance performance, cost, etc., are appropriately determined by appropriately setting various parameters of components. Performance must be satisfied. However, setting one parameter usually affects a plurality of performances, and setting parameters is very difficult.

For example, the operation performance is evaluated based on the responsiveness of the machine to various operation patterns. However, the demands for the responsiveness to the machine are different depending on each operation pattern, and may be contradictory. When evaluating the boom raising operation, it is better that the boom raising speed is fast.However, if such parameters are set, the balance between turning and the boom speed will be lost during the boom raising turning operation, resulting in poor operability. In addition, the vibration at the time of stopping the boom raising becomes large, and the operability and the riding comfort are deteriorated.

[0004] As described above, it is extremely difficult to appropriately determine various parameters, and a large part has relied on the experience and intuition of the designer. For this reason, it is usual to adjust the parameters on the actual machine after making the prototype machine and make design changes. However, recently, a computer-based simulation has been performed at the design stage to find appropriate parameters.

There are two ways to find appropriate parameters using simulation.

One is a method of adjusting by trial and error such that all required performances are satisfied while changing the combination of parameters.

[0007] The other one, which is not currently applied to construction machinery, uses an optimization design method as a general method. A target index and a target value of a system to be designed are determined, and the system is designed. This is a method of searching for a combination of parameters in which the target index is a value closest to the target value. in this case,
A plurality of target indices are weighted, and the sum of the products of the respective target indices and the weights is used as an overall target index, and an optimal solution is obtained as a single target problem.

[0008]

However, the method of adjusting parameters by trial and error described above is time-consuming and costly, and it is difficult to find an optimal solution. Further, since the number of combinations of parameters that can be actually tested is limited, much experience and know-how of construction machines are required, and the designer has to perform a trial and error simulation by himself.
Therefore, the designer himself / herself must have deep knowledge of the simulation, and the designer himself / herself must spend a great deal of time on the simulation.

Also, the method using the optimization design method has a problem that it is difficult to apply the construction machine because of its strong nonlinearity, and it is difficult to determine the weight when performing weighting. Also, there are performances that are difficult to digitize and formulate, and even if the solution is shown by the optimization design method,
It was difficult for the designer to judge whether or not to adopt the solution with only one solution shown.

The present invention solves the above problems and presents a designer with a combination plan of all parameters satisfying a plurality of required performances so that the designer can select an optimum plan. It is an object of the present invention to provide a design support system for a construction machine.

[0011]

In order to achieve the above object, the present invention provides a construction machine design support system for supporting a design for realizing a plurality of target performances. An input means for inputting a plurality of target indices representing a plurality of target performances, an allowable range of each of the target indices, a parameter changeable to achieve the target performance, and a variable range of each of the parameters, Storage means for storing a value input by the input means, simulation means for performing a simulation calculation of the operation of the construction machine based on the parameters stored in the storage means, and a value of the target index calculated by the simulation means Calculating means (search for obtaining a combination of the parameters falling within the allowable range previously stored in the storage means; And stage), characterized in that it comprises a display means for displaying a combinatorial result of parameters determined by the calculation means.

According to the first aspect of the present invention, a parameter combination plan (passing plan) capable of satisfying a plurality of requirements can be found in a relatively short time by using the functions of computer simulation and performance evaluation by arithmetic means. It is possible to shorten the development period of the machine and reduce the development cost. Also, by setting the allowable range of the target index,
The present invention can be applied to a system having a target index that cannot be clearly defined numerically, and can propose a plan close to the designer's expectation, and can be applied to a wide range of design work. In addition, by providing a plurality of alternatives, designers have a choice to choose from, and if there is a design requirement other than the input target index, select an alternative from multiple alternatives that satisfies the requirement. It is possible to flexibly respond to the requirements of the designer.

According to a second aspect of the present invention, in the design support system for a construction machine according to the first aspect, the result of the combination of the parameters obtained by the operation means is arranged in accordance with the value of the target index and the relationship with the parameter. It is characterized by having a sorting means.

According to the second aspect of the present invention, since a large number of acceptable proposals are arranged and sorted from various viewpoints, a designer can easily select a proposal closest to his or her will.

According to a third aspect of the present invention, there is provided a construction machine design support system according to the first or second aspect.
The display unit displays a simulation result based on the selected parameter by selecting a combination of the displayed parameters.

According to the third aspect of the present invention, it is possible to check the details of each plan by displaying the simulation result.

According to a fourth aspect of the present invention, in the construction machine design support system according to any one of the first to third aspects, the input means and the display means are included in a first processing means. Is included in the second processing means, and the first processing means and the second processing means are connected via a network.

According to the fourth aspect of the present invention, the first processing means is located in the design department, and the second processing means is located in the system development / operation department or a specialized analysis company. Business and system analysis / optimization can be separated smoothly.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing the configuration of an embodiment of a construction machine design support system according to the present invention.

In FIG. 1, reference numeral 1 denotes an input means, which includes a plurality of target indices indicating a plurality of target performances, an allowable range of each of the target indices, and a parameter which can be changed to realize the target performance, and the like. Enter the variable range of each parameter. Reference numeral 2 denotes storage means for storing the contents input by the input means. 3 is a simulation means for performing a simulation calculation of the operation of the construction machine,
2. Description of the Related Art A system for simulating various components of a construction machine and its entirety using a general-purpose program (for example, program name ACSL) has been constructed. Reference numeral 4 denotes search means for finding a combination of parameters in which the value of the target index calculated using the simulation means 3 falls within an allowable range within a variable range of the parameters input by the input means 1. That is, the search means 4 obtains a combination within a variable range of the changeable parameters input by the input means 1 and stored in the storage means 2, and determines the combination of the parameters and the type of the target index by the simulation means 3. To determine whether the value of the target index obtained from the simulation result calculated by the simulation means 3 is within an allowable range, and obtain a combination of parameters when the value is within the allowable range. 5 is search means 4
Sorting means 6 for arranging the parameter combinations obtained in the above by their characteristics, and display means 6 for displaying the results of the parameter combinations arranged by the sorting means 5 and displaying the results verified by simulation as necessary. is there.

Here, the input means 1 and the display means 6 constitute a first processing means I, perform input / output of information with a designer, and the other means constitute a second processing means II. Performs various arithmetic processing in this system.

Next, the operation of each block in the block diagram of FIG. 1 will be described with reference to FIGS.

In FIG. 1, a designer using the present system first inputs a target index indicating a target performance of a machine to be designed, a target value of the target index, and a range of allowable values with the input means 1. . Next, a parameter that can be changed to achieve the target performance, a changeable range of the parameter, and a minimum change step for changing the parameter are input.

FIGS. 2 and 3 are diagrams showing examples of the input of the input means 1 in FIG.

FIG. 2 shows an example of inputting a target. In this figure, for example, a boom raising speed, a boom stop vibration pressure, a boom arm composite operation trajectory shift amount, etc. relating to operability are set as target index names, and a target value, a target upper limit value, and a target lower limit value are input. Thus, here, the target index and the allowable range are input for a plurality of targets.

FIG. 3 shows an example of inputting parameters. In this figure, parameters related to the target of FIG. 2, such as a cylinder area, a pump flow rate, and a break point in a graph of a valve opening area, are input. Then, the current value and the variable range or variable value are input. Here, the input of the variable range or the variable value may be performed by specifying a continuous range or a discrete value. In the example of FIG. 3, the cylinder area, the pump flow rate, and the like are determined by the specifications of parts. In this example, discrete values are used to select from existing products.
In this example, the valve is set to have a continuous variable range in order to newly design and manufacture. In the example of FIG. 3, the minimum change increment of the parameter takes a value set in advance, and the value is changed separately.

FIG. 4 is a flowchart showing the processing contents of an embodiment of the construction machine design support system of the present invention, and shows the processing contents of FIG. 1 in detail.

The input by the input means 1 is performed in step 1,
The target values Ii (i = 1, M) of the M target indices, the respective allowable deviation ranges Δi (i = 1, M), N parameter Pj (j = 1, N) that can be changed, and The variable range [aj, bj] (j = 1, N) of each value and the step width δj (j = 1, N) for changing each parameter
And the value Pj0 of the current parameter of the machine (j = 1,
N). In some cases, the parameter is input as a discrete value without specifying the step width δj.

The contents thus input are stored in the storage means 2 in FIG. Next, the search means 4 shown in FIG. 1 first sends the type of the target index stored in the storage means 2 to the simulation means 3, and thereafter, a plurality of parameters stored in the storage means 2, a changeable range thereof and a minimum change thereof. A combination of parameters is sequentially created based on the step and sent to the simulation means 3.

The simulation means 3 stores a simulation model created by analyzing the construction machine in advance, determines the type of simulation according to the type of the target index sent from the search means 4, and thereafter searches the simulation means 4. The simulation calculation of the construction machine is performed using the combination of the parameters sent from the third party and other parameters that do not change. Then, the simulation result is returned to the search means 4.

The search means 4 calculates the values of the target indices corresponding to the respective target indices stored in the storage means 2 based on the simulation result, and determines whether or not all the values of the target indices are within an allowable range. Find out. Then, when the value falls within the allowable range, the combination of the parameter and the value of the target index are stored as a pass plan.

The flow for searching for a pass plan by the search means 4 and the simulation means 3 is shown in steps 2 to 7 in FIG. First, in step 2, each parameter is swept within a variable range. That is, each parameter Pj is aj, aj + δj, aj + 2δj,.
.., bj are sequentially changed. Note that the parameter Pj
Is discretely input, the value is sequentially changed. In this way, combinations of the values of the parameters are sequentially obtained.

Next, in step 3, a simulation is performed on the combination of the parameters obtained in step 2 by using the simulation means 3 in order to obtain the values of the M target indices.

In step 4, M target index values Ii 'are calculated from the simulation results.

In step 5, it is determined whether or not the calculated values Ii 'of the M target indices are within the respective allowable deviations Δi, and all of the M target indices are within the deviation range. In some cases, the flow proceeds to step 6 as a pass, and when there is at least one that exceeds the deviation range, the flow returns to step 2 as a reject.

In step 6, the values of the N parameters Pj and the M target indices Ii 'of the pass plan are determined by passing the pass plan E
1 (l = 1,...).

In step 7, it is determined whether the sweep of the parameters has been completed, that is, whether or not all combinations in which all parameters have been changed within the variable range have been executed. If the execution has not been completed, the process returns to step 2; Assume that H pass plans are stored when the sweep is completed.

In this way, the combination of parameters and the simulation are repeated by the search means 4 and the simulation means 3, and a combination plan of all parameters (passing plan) in which all the values of the target index fall within the allowable deviation range. ) Is calculated. Here, the deeper the designer's experience and knowledge of inputting into the input means, the smaller the allowable range of the target index can be made. However, this range is usually large, and the number of acceptable proposals is also large.

The sorting means 5 shown in FIG. 1 is provided in order to sort out a large number of acceptable proposals and to assist the designer in making a decision. The sorting means 5 sorts the acceptable proposals according to their characteristics. For example, it is sorted and arranged in such a way that the difference between the value of the target index and the target value is the minimum, the next, the third, and the like. Similarly, classification is performed by sorting from various viewpoints, such as an optimal plan for a single performance target and a minimal plan for parameter change.

In the flowchart of FIG. 4, this processing content is a part of sorting of the acceptable proposals, and H acceptable proposals El (l =
1, H) are classified and sorted by their characteristics.

First, in step 8, sorting is performed in the order of optimum overall performance. In other words, H acceptable proposals El are arranged in ascending order of the sum of the squares of the deviations of the M target indices of each proposal and the corresponding target value 値 (Ii−Ii ′) ² . And the top three
The plans A1, A2, and A3 are stored as total performance optimum plans.

In step 9, the individual performances are sorted in the optimum order. That is, H passing proposals El are arranged in ascending order of the deviation | Ii−Ii ′ | between the value of the target index of each plan and the corresponding target value for each target index. Since the process is performed for each of the M target indices, there are M types of acceptable proposals. Then, the upper three plans Bi1, Bi2, Bi3 (i = 1, M) are stored as single performance optimum plans.

In step 10, the data is sorted in the order of the minimum total parameter change. That is, the H number of accepted proposals El are arranged in ascending order of the total change rate of the N parameter values Pj of each proposal from the current parameter value Pj0Σ [(Pj−Pj0) / (bj−aj)] ^2. . Then, the top three plans C1 and C2C3 are stored as the minimum total parameter change plans.

In step 11, the data is sorted in the order of the minimum change of each single parameter. That is, for each parameter, H pieces of acceptable proposals El are arranged in ascending order of the difference | Pj−Pj0 | between the parameter value Pj of each proposal and the current parameter value Pj0. Since the process is performed for every N parameters, there are N types of acceptable proposals. And the top three alternatives Dj
1, Dj2, Dj3 (j = 1, N) are stored as the minimum single parameter change plan. Then, it proceeds to the display of the pass proposal.

The display means 6 shown in FIG. 1 displays the parameter combinations proposed by the sorting means. Then, when any of the displayed options is selected, the combination of the parameters is sent to the simulation means 3, the simulation is executed, and the result is displayed. As a result, the designer can check the details of each plan, and can select the optimum plan.

In the flow chart of FIG. 4, the display of the pass plan indicates the content of this processing. First, in step 12, the pass plans stored by sorting the pass plans (steps 8 to 11) are displayed on the screen. This display is shown in FIG.
It looks like the screen shown by.

In step 13, the designer selects one interesting plan from among the above-mentioned acceptable plans, and selects a target index to be verified among them. If the target index is related to operability, this is the selection of the operation pattern.

In step 14, this information is sent to the simulation means 3 to simulate the machine with the selected plan.

In step 15, the results such as the response of the machine are displayed based on the calculation results of the simulation means 3.

The designer repeats Step 13 (Step 12 if necessary) to Step 15, examines each plan, and selects the best plan that best suits his or her will.

FIG. 5 is a diagram for explaining an example of display contents displayed on the display means 6 in FIG.

In FIG. 5, reference numeral 20 denotes a screen first showing the result sorted by the sorting means 5, and displays items 20a to 20d classified by the sorting means. When one of those items is selected, the previous screen indicated by the arrow is displayed, and the sorted pass proposals are shown. If there are many successful proposals, one copy is displayed. In this example, the top three alternatives are displayed.

Here, when the comprehensive performance optimization plan 20a is selected, a screen 21 is displayed, and three proposals are sequentially arranged from the pass plan with the smallest sum of deviations between the values of the plurality of target indices and the respective target values, and the total performance optimum plan 1 is selected. -3. Single performance optimization plan 2
When 0b is selected, the screen 22 is displayed first, and the target items (goal 1, target 2,...) Are displayed. When one of them is selected, the screen 23 is displayed, and the target index corresponding to the selected target is displayed. Then, three proposals are displayed as optimal proposals 1 to 3 in order from the passing proposal having the smallest deviation from the target value. When the minimum total parameter change plan 20c is selected, the screen 24 is displayed, and three plans are displayed as minimum total parameter change plans 1 to 3 in order from the pass plan with the lowest total change rate from the current value of each parameter. When the single parameter change minimum plan 20d is selected, the type of the parameter is first displayed on the screen 25, and when one of them is selected, the screen becomes the screen 26, and the deviation of the selected parameter from the current value is determined in order from the pass plan with the smallest deviation from the current value. Three plans,
These are displayed as single parameter change minimum plans 1 to 3.

As described above, the screens 21, 23, 24, 2
The various plans displayed in 5 are confirmed by simulation calculation on the screen 27, and the designer selects the most suitable plan.

FIGS. 6 and 7 are diagrams showing the hardware configuration of an embodiment of a construction machine design support system according to the present invention. The first processing means I and the second processing means II in FIG. 1 are shown.
3 shows a connection form.

FIG. 6 shows the first processing means I and the second processing means I.
In this configuration, I is directly connected. At this time, the processing means II is configured on the main processing unit of the computer, and the processing means I is configured on the input / output terminal device. Such a configuration,
This is a general configuration, and a designer goes to a place where this system is installed to operate the design support system of the present invention.

FIG. 7 shows the first processing means I and the second processing means I.
In this configuration, I is connected via a network. At this time, the processing means II is configured on a server connected to the network, and the processing means I is configured on a client terminal connected to the network, and can be operated from a plurality of terminals. This network has various forms, such as an in-house LAN, an in-house wide area network, and the Internet.

If the connection is made via the network as described above, the designer can perform input / output and confirmation work using the terminal at his / her seat or in the vicinity thereof, so that the design work can be performed more efficiently. Maintenance of system analysis, simulation programs, and the like may be performed by an expert arranged on the server side.

[0060]

As described above, according to the present invention, computer simulation and calculation means (search means)
By using the performance evaluation function, it is possible to find a parameter combination plan (passing plan) that can satisfy multiple requirements in a relatively short period of time, shortening the machine development period and reducing development costs. Will be possible.

Further, by setting an allowable range of the target index, the present invention can be applied to a system having a target index that cannot be clearly defined numerically, and a proposal close to the expectations of the designer is proposed. It can be applied to a wide range of design work.

Further, by providing a plurality of alternatives, the designer is provided with a choice and, even when there is a design requirement other than the input target index, the requirement is satisfied from the plurality of alternatives. It is possible to select a plan, and it is possible to flexibly respond to a request of a designer.

In addition, the input (analysis request) and the output of the analysis result (report of the result) can be easily standardized, the division of work between the system designer and the analysis expert can be performed smoothly, and the whole development work can be efficiently advanced. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a construction machine design support system according to the present invention.

FIG. 2 is a diagram showing an example of an input of an input unit 1 in FIG.

FIG. 3 is a diagram showing an example of an input of an input unit 1 in FIG. 1;

FIG. 4 is a flowchart showing processing contents of an embodiment of a construction machine design support system according to the present invention.

5 is a diagram illustrating an example of display contents displayed on a display unit 6 in FIG.

FIG. 6 is a diagram showing a hardware configuration of an embodiment of a construction machine design support system according to the present invention.

FIG. 7 is a diagram illustrating a hardware configuration of an embodiment of a construction machine design support system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input means 2 Storage means 3 Simulation means 4 Search means 5 Sorting means 6 Display means

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Yasuhiko Fukuchi 650, Kandamachi, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. (72) Inventor Katsushika Tsukamoto 650 Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant F-term (reference) 5B046 AA00 JA04

Claims (4)

[Claims] 1. A construction machine design support system for supporting a design for realizing a plurality of target performances, comprising: a plurality of target indices representing a plurality of target performances; an allowable range of each of the target indices; and a target performance. Input means for inputting a parameter which can be changed to realize the above and a variable range of each parameter; storage means for storing the content input by the input means; and the parameter stored in the storage means A simulation means for performing a simulation calculation of the operation of the construction machine based on the calculation means; and a calculation means for obtaining a combination of the parameters in which the value of the target index calculated by the simulation means falls within the allowable range stored in the storage means in advance. And display means for displaying a combination result of the parameters obtained by the calculation means. Construction mechanical design support system, characterized by. 2. The construction machine design support system according to claim 1, further comprising a sorter for organizing a result of the combination of the parameters obtained by the calculator according to a value of a target index and a relationship with the parameter. Characteristic construction machine design support system. 3. The construction machine design support system according to claim 1, wherein said display means displays a simulation result based on the selected parameter by selecting a combination of the displayed parameters. Characteristic construction machine design support system. 4. The construction machine design support system according to claim 1, wherein the input means and the display means are included in a first processing means, and the other means is a second processing means. A construction machine design support system included in the processing means, wherein the first processing means and the second processing means are connected via a network.