The SPMT construction method is a new rapid construction technology of large urban overpass with unblocked traffic,and unstability of SPMT construction method equipment cannot be accurately described due to the concre...
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The SPMT construction method is a new rapid construction technology of large urban overpass with unblocked traffic,and unstability of SPMT construction method equipment cannot be accurately described due to the concrete beam size,irregular shape and complex transport conditions,which is called kiloton bridge transporting and laying *** anti-rollover performance of SPMT suspension system is studied,and vehicle side slip angle and load transfer rate(LTR) are regarded as the evaluation *** active suspension adaptive anti-rollover control model of SPMT,in which roll stability affected by the structural parameters and control parameters,is built based on fuzzy PID,and the effectiveness of the control method is verified through real vehicle test.
Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound co...
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Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.
The cooling performance makes a full impact on the operation stability of the microcomputer *** to now,no effort is found toward on the experimental research of cooling performance of the micro
The cooling performance makes a full impact on the operation stability of the microcomputer *** to now,no effort is found toward on the experimental research of cooling performance of the micro
The two-rotational-degrees-of-freedom（2R） parallel mechanism（PM） with two continuous rotational axes（CRAs） has a simple kinematic *** is therefore easy to implement trajectory planning,parameter calibration,and ...
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The two-rotational-degrees-of-freedom（2R） parallel mechanism（PM） with two continuous rotational axes（CRAs） has a simple kinematic *** is therefore easy to implement trajectory planning,parameter calibration,and motion control,which allows for a variety of application ***,no systematic analysis on structural constraints of the 2R-PM with two CRAs has been performed,and there are only a few types of 2R-PM with two ***,a theory regarding the type synthesis of the 2R-PM with two CRAs is systematically ***,combining the theories of reciprocal screw and space geometry,the spatial arrangement relationships of the constraint forces applied to the moving platform by the branches are explored,which give the 2R-PM two *** different distributions of the constraint forces in each branch are also *** the basis of the obtained structural constraints of branches,and considering the geometric relationships of constraint forces in each branch,the appropriate kinematic chains are *** the reasonable configuration of branch kinematic chains corresponding to every structural constraint,a series of new 2R-PMs with two CRAs are finally obtained.
Due to the fuzziness and incompleteness of hydraulic pump single fault signal,sometimes we cannot accurately assess the working state of hydraulic *** extracting the characteristic vector
Due to the fuzziness and incompleteness of hydraulic pump single fault signal,sometimes we cannot accurately assess the working state of hydraulic *** extracting the characteristic vector
In this study, a hybrid algorithm combining genetic algorithm （GA） with back propagation （BP） neural network （GA-BP） was proposed for extracting the characteristics of multi-peak Brillouin scattering spectrum. S...
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In this study, a hybrid algorithm combining genetic algorithm （GA） with back propagation （BP） neural network （GA-BP） was proposed for extracting the characteristics of multi-peak Brillouin scattering spectrum. Simulations and experimental results show that the GA-BP hybrid algorithm can accurately identify the position and amount of peaks in multi-peak Brillouin scattering spectrum. Moreover, the proposed algorithm obtains a fitting degree of 0.9923 and a mean square error of 0.0094. Therefore, the GA-BP hybrid algorithm possesses a good fitting precision and is suitable for extracting the characteristics of multi-peak Brillouin scattering spectrum.
The equipment and transportation safety will be affected greatly by the wind in the process of the large-scale precision equipment transited *** the numerical simulation analysis of the ex
The equipment and transportation safety will be affected greatly by the wind in the process of the large-scale precision equipment transited *** the numerical simulation analysis of the ex
More and more extra large equipment transport is achieved by means of joint operation of large scale engineering *** of the characteristics of high quality,large bulk,irregular size an
More and more extra large equipment transport is achieved by means of joint operation of large scale engineering *** of the characteristics of high quality,large bulk,irregular size an
Through the descriptions and effect evaluations of the compliance of self-adaption suspension group systems in selfpropelled transport,a kind of self-adaption suspension group system was improved and
Through the descriptions and effect evaluations of the compliance of self-adaption suspension group systems in selfpropelled transport,a kind of self-adaption suspension group system was improved and
To improve the jet performance of a fire water monitor,the monitor head with three different inner contour lines were *** on FLUENT,the calculation domain was defined geometrically and then
To improve the jet performance of a fire water monitor,the monitor head with three different inner contour lines were *** on FLUENT,the calculation domain was defined geometrically and then
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