The aim of this paper is to obtain the mathematical model and the real time model of the Single Input Single Output
(SISO) conical tank system. The experimental model is obtained from the open loop response in real time and the
transfer function is obtained using the two point method. For the real time model, two different controllers namely
Zeigler Nichols tuned PI controller and passivity based controller are designed and tested in simulation and the
performance of both the controllers are tested for servo operation and regulatory operation. The designed controllers
are tested in Simulation and the response is recorded. The simulation results shows that the Passivity based
Controller works better for the spherical tank process.
Bangladesh is becoming increasingly vulnerable to the growing threat of climate change induced sea level rise.
Considering the potential severe impacts that sea level rise will have on the coastal population and the country’s
economy, it has become very important to know about the regional trends of changing sea levels along the
coastlands of Bangladesh. The present study attempted to portray a representative scenario of sea level rise in the
coastal regions of Bangladesh. Historic tide gauge records, ranging from 20 to 45 years, were used to determine
reliable trends at multiple locations along the coast. Linear regression method was applied to derive the changing
trend of annual high, mean and low tidal water levels. The location-specific trends of sea level rise determined in
this study can be helpful to planners and policy makers to combat the emerging threat of SLR in a more efficient
The replacement of damaged bone is done by design of bone then analyzing its properties, In Human body Bone plays important role in body. Which support & protect body parts. Bones comes in a variety of shapes and sizes and has complex internal and external structure. During daily activities, the skeletal system is subjected to a complicated loading exerted by the different loading conditions. Such loading modes for femur bones are include tensile, compressive, bending, and torsional forces applied to the bones of the skeletal system. In this project we have done FEA Analysis with different materials like Stainless steel, Titanium, ABS, PLA and develop artificial bone by 3D printing technology. The aim of this work is analysis & manufacture femur bone which can replace characteristics. Then it is to be printed by 3D Printer as prototype model.
Multi-objective optimization problems (MOOP) involve minimization of more than one objective functions and all
of them are to be simultaneously minimized. The solution of these problems involves a large number of iterations.
The multi- objective optimization problems related structural optimization of complex engineering structures is
usually solved with finite element analysis (FEA). The solution time required to solve these FEA based solutions are
very high. So surrogate models or meta- models are used to approximate the finite element solution during the
optimization process. These surrogate assisted multi- objective optimization techniques are very commonly used in
the current literature. These optimization techniques use evolutionary algorithm and it is very difficult to guarantee
the convergence of the final solution, especially in the cases where the budget of costly function evaluations is low.
In such cases, it is required to increase the efficiency of surrogate models in terms of accuracy and total efforts
required to find the final solutions.In this paper, an advanced surrogate assisted multi- objective optimization
algorithm (ASMO) is developed. This algorithm can handle linear, equality and non- linear constraints and can be
applied to both benchmark and engineering application problems. This algorithm does not require any prior
knowledge for the selection of surrogate models. During the optimization process, best single and mixture surrogate
models are automatically selected. The advanced surrogate models are created by MATSuMoTo, the MATLAB
based tool box. These mixture models are built by Dempster- Shafer theory (DST). This theory has a capacity to
handle multiple model characteristics for the selection of best models. By adopting this strategy, it is ensured that
most accurate surrogate models are selected. There can be different kind of surrogate models for objective and
constraint functions. Multi-objective optimization of machine tool spindle is studied as the test problem for this
algorithm and it is observed that the proposed strategy is able to find the non- dominated solutions with minimum
number of costly function evaluations. The developed method can be applied to other benchmark and engineering
This is often seen that when the roads are to be repaired or re-tarred the man holes get covered up due increase in height of the road and hence they have to reconstructed to adapt to the height of the road else Misaligned manhole frames in streets often cause driving hazards, failure of pavement around the frames, cause poor access to manholes, may be responsible for inflow and infiltration and can also result in other problems. Because manhole frames are not manufactured to be adjustable, an effort to make repairs is time consuming and often in effective. Thus there is a need to develop an height adjustable manhole system where in manhole system be constructed by casting the manhole by suitable method according to the Indian Standard so as to make the system flexible enough to adjust the height of the manhole as per requirement. The scaled model of the height adjustable manhole will be made and solid modeling using Unigraphix software will be done to determine optimal dimension of gear-shaped parts through bending stress formulas and application Ansys work bench software to validate the strength of the manhole analytically. Fabrication of the scaled model will be done after appropriate selection of the nodular cast iron frame work, for nut and screw parts where as the holder elements will be developed by fabrication. Testing will be done by suitable methods to determine and experimentally validate the strength of the developed part of the manhole.