An application of modified adaptive bats sonar algorithm (MABSA) on fuzzy logic controller for dc motor accuracy

Controllers are mostly used to improve the control system performance. The works related to controllers attract researchers since the controller can be applied to solve many industrial problems involving speed and position. Fuzzy logic controller (FLC) gains popularity since it is widely used in industrial application. However, the FLC structure is still lacking in terms of the accuracy and time response. Although there are optimization technique used to obtain both accuracy and time response, it is still lacking. Therefore, this research presents works on the FLC system which is the fuzzy inference system that will be optimized by the modified adaptive bats sonar algorithm (MABSA) for the DC servo motor position control. The MABSA will be optimized with the range of the membership input in the FLC. The research aims are to achieve accuracy while minimizing the time response of the DC servo motor. This is done by designing the FLC using the Matlab toolbox. After the FLC is designed completely, the Simulink block diagram for the DC servo motor and FLC are built to see the performance of the controller. The range of the membership function for inputs and outputs will be optimized by the MABSA to get the best positional values. The performance of the developed FLC with the optimized MABSA is verified through the simulation and robustness tests with the system that did not use the FLC and also the system without MABSA. It was demonstrated from the study that the proposed FLC with optimization of MABSA algorithm was able to yield an improvement of 3.8% with respect to the rise time in comparison to other control schemes evaluated. When compared with PSO algorithm, proposed FLC optimized by MABSA showed improvement by 12.5% in rise time and 10% in settling time. PSO-FLC also give 0.6% steady state error compared to the MABSA-FLC. In conclusion, the results validate the better performance in terms of rise time and settling time of the developed FLC that has been optimized by the MABSA

An efficient scheme of automation and control for conventional cable manufacturing industry

In context of a 132 kV stranded conductor manufacturing plant, a unique automation scheme combining active energy front (AEF) along with variable frequency drives (VFDs) synchronization for achieving virtual electronic shaft aiming for simplified kinematics is implemented. A new design concept of tension control in take-up system and winding pitch control through autotraverse control was developed for unmanned operation. The outcome was optimum line speed and the power consumption linearly varying with increase in line speed, which is the core advantage of using synchronized line speed via VFD. There is no hidden energy loss in the system and the inertia of the whole driven system is also reduced. In case of high-voltage cable, the life expectancy depends upon the uniform pattern of lay length with compactness, and it is a significant achievement in terms of improvement in the product quality. The novelty of this work is the simultaneous implementation of various features in a single working setup. Conventional design of very long shaft attached with huge gearboxes is replaced with a virtual electronic shaft synchronizing seven VFDs attached to a very heavy inertial load. When considering the project size, there should be replacement of the high-maintenance-prone switchgears with AEF and LCL filters coupled with common dc bus; this helps in reducing the overall project cost. Self-controlled clean and quality power [below 3% of total harmonic distortion (THD)] feeding to utility network was achieved. Energy saving with improved power factor and higher efficiency is a significant achievement from this setup. Configurable automation software using the programmable logic control (PLC) and human machine interface (HMI) for flexible production was used as per market requirements (especially for 132-kV conductor sector). The scope of this paper is limited to the overview of implementing the automation scheme, energy savings, harmonics control, and other process control rel..