Motilal Nehru National Institute of Technology Allahabad

About: Motilal Nehru National Institute of Technology Allahabad is a education organization based out in Allahabad, Uttar Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 2475 authors who have published 5067 publications receiving 61891 citations. The organization is also known as: NIT Allahabad & Motilal Nehru Regional Engineering College.

A Review of MPPT Algorithms Employedin Wind Energy Conversion Systems

Abstract: The depleting nature of fossil fuels and the environmental threats have resulted in the emergence of renewable energy sources (RESs) as alternative and accessible energy resources. Amongst various RESs, wind energy is one of the fastest growing distributed energy resources because of its zero-carbon emission and cost efficient generation. Although wind energy is plentiful, it is of intermittent nature, i.e., the wind speed is not constant throughout. So, the strategy followed is to harness maximum output power from this variable wind as when it is available, and various algorithms for maximum power operating point tracking (MPPT) have been proposed and implemented successfully. However, choosing an exact MPPT algorithm for a particular application requires a high degree of skill as each algorithm has its pros and cons. This paper presents a review of various MPPT algorithms suggested in the literature.

Influence of Mn doping on structural, electrical and magnetic properties of (0.90)BiFeO 3 –(0.10)BaTiO 3 composite

Abstract: Structural, electrical and magnetic properties of chemically synthesized polycrystalline Mn doped (0.90)BiFeO3–(0.10)BaTiO3 composites [(0.90)BiFe1−xMnxO3–(0.10)BaTiO3 (x = 0.0, 0.03, 0.05 and 0.10)] were studied. The dielectric constant was observed to decrease when frequency was increased from 20 Hz to 1 MHz and increased with the increase in temperature from 313 to 773 K. An interesting correlation between the antiferromagnetic Neel temperature (TN) of bismuth ferrite and temperature dependent dielectric constant was observed. The calculated values of activation energies were in the order of 0.25–0.74 eV (<1.0 eV) and decreases with an increase of Mn concentration. The variation of a.c. conductivity obeyed the Jonscher’s power law (σ ac ∝ ω s ). The observed value of exponent‘s’ were in the range 0.09 < ‘s’ < 0.78 (<1.0) for all the sample at temperature ranging from 473 to 598 K. There was a systematic increase in the value of spontaneous magnetization on increasing Mn concentration.

To design optimally tuned FOPID controller for twin rotor MIMO system

Abstract: This paper proposes a method to design optimally tuned fractional order as well as integer order proportional-integral-derivative (PID) controllers for twin rotor-multi-input multi-output system (TRMS), Two fractional order PID (FOPID) controllers for one degree of freedom (1-DOF) in horizontal plane and 1-DOF in vertical plane are designed separately using linear model. Design criterion consists of a performance index which is minimized using particle swarm optimization (PSO) to obtain the controller parameters for satisfactory responses. In order to assess the performance of closed loop control system a continuously varying reference trajectory has been taken which is tracked by actual response. It is found in simulation study that the FOPID controllers perform better than integer order PID (IOPID) controllers based on same design criteria.