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This article is mainly talking about a molding hydraulic machine realized by telescopic cylinder under the control of constant pressure variable pump. In order to achieve a precise control of prospective pressure conditions, there is a need to determine the PID parameters by analyzing its pressure closed-loop simulation and performance, which based on the SISO Design Tool of MATLAB.
SDSim is a novel solar dryer simulator based in a multi-crop, inclined multi-pass solar air heather with in-built thermal storage mathematical model. This model has been developed as a designing and developing tool used to study and forecast the behavior of the system model in order to improve its drying efficiency and achieving a return on the dryer investment. The main feature of this simulator...
In this paper, a new bond graph method (BGM) model to describe the thin-walled elastic tube with the inviscid compressible fluid is presented. This model represents an improvement over the classical BGM model because the fluid-structure interaction, which acts an important pole in the modal analysis of the pipe with fluid, is considered in this model. The new model is applied to a short water-filled...
This paper analyzes a vibration problem occurs in multi-way valve throttle load experiment. The dynamic process of the vibration in throttle valve is first analyzed to find out the key parameters relating to the vibration. Then an AMESim model of the hydraulic system with the vibrating throttle valve has been built. Detailed research on how these parameters influence the vibration is done based on...
As electro-mechanical energy conversion interface of electro-hydraulic control valve, the electro-mechanical converter has a crucial influence on the performance of valve itself and thus the whole electro-hydraulic control system. In this paper the mathematical model of electro-mechanical converter using stepping motor was established and its frequency characteristic with voltage control and current...
High-performance robust synchronization motion control for quad-cylinder electro-hydraulic lift systems with parametric uncertainties and uncertain nonlinearities is considered. Adaptive Fuzzy logic systems are introduced as an approximator to counteract the effects of coupling among acceleration terms. Robust adaptive control by backstepping is used to handle parametric uncertainties and uncertain...
A Bond Graph model is built for the steering system of automatic vehicle and a set of model equations are derived for further analysis purpose. For identifying several uncertain parameters, an integrative approach that combine least square method with Bp Neural Network algorithm (NN) is proposed, based on features of NN algorithm, two key improvements are bring into the training method of Bp NN: taking...
In this paper, the scheduling problem of the network with limited bandwidth is considered. In order to improve the network quality of service and the quality of control simultaneously, an intelligent feedback scheduling method is proposed. The scheduler reschedules the priority, the sampling period, and the output threshold concurrently according to the control authority of each node, which is calculated...
An effective lane boundaries projective model (LBPM) and improved detection method in the images captured with a vehicle-mounted monocular camera in complex environments, especially for sharp circular curve lane, is proposed in this paper. Firstly, a lane boundaries projective model is deduced. This lane model can not only express straight-line lane boundaries, but also describe the actual sharp circular...
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