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Accurate mathematical models especially accurate hydrodynamic parameters of unmanned underwater vehicles (UUVs) are essential for good control performance. This paper provides a general framework for the hydrodynamic modeling of a small-scale UUV. In place of physical experiments such as captive model tests, a virtual model test and simulation was conducted via commercial computational fluid dynamics...
Much insight into pedestrian flow dynamics has been achieved by conducting simulations and experiments. However, the combination of pedestrian movement and psychological influence in discrete models has not been well investigated. Here we employ a multi-grid model to understand pedestrian dynamics in counter flow, coupled with the effect of emotion propagation in a crowd stampede induced by panic...
In this thesis, a new control algorithm iterative learning control (ILC) is applied in the force load control for fatigue testing machine due to non-linearity and unmodeled character of electro-hydraulic servo system and repeatability of fatigue testing machine. A model is established to describe electro-hydraulic servo force control system. According to the model, a controller based on ILC is designed...
The paper proposed an algorithm which can get over the BP algorithm's shortcomings of slow convergence speed, computation complexity and local minimum by using the UKF to estimate the parameters of WNN. Then it takes the phenomenon of aerodynamic modeling of quasi-steady stall for ATTAS aircraft as applying background and uses the algorithm of BP, EKF and UKF to train the WNN respectively. From the...
The synthesis control of force and position in electro-hydraulic servo system has been applied to some special occasions. Analyzed a typical system which adopted this kind of control algorithm. Applying unchanged structure theory, the compensated transfer function has been deduced, the compensated state-space model is presented. Considering the synthesis control should meet the requirement to force...
An electro-hydraulic servo force feedback system is disturbed by a band-limited white noise, it adopted the conventional PID control algorithm. Simulated its dynamic characteristics. Constructed the system simplified model, Designed the GPC Controller and summarized its design procedure. The simulation based on the GPC with simplified model has been done. Compared the two simulation results, The GPC...
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