International Journal of Radio, Space and Aerospace Engineering

Author:- Apoorva Chouhan

Abstract:- This paper looks at the current information technology tools and information resources used in the aerospace business. Initially, a basic introduction of information technology and its use in the aerospace sector is provided. The advantages and disadvantages of information technology are discussed. The paper then focuses on the information tools that these organizations are now using, as well as organizational transformation as a result of technology adoption.

Keywords:- Aerospace Engineering; Information Technology; CAD; Aircraft Design Process; Innovation Management

Authors:- Rekha Rathore, Avantika Choudhary, Raghuveer singh

Abstract:- Advanced lightweight laminated composites are increasingly being employed to improve structural economy and performance in current aerospace construction. Delamination is one of the most prevalent failure types for composite materials. Remote loading on composite components is often resolved into interlinear tension and shear stresses at discontinuities, resulting in mixed mode I, II, and III delamination.The notion of filament woven composite structures for military purposes is relatively new, and such structures have recently been constructed by researchers and engineers using a variety of production procedures. Given this background, the goals of this work are that the carbon fiber reinforced prepares composite rocket motor case will be created? Delamination’s are more common in CRMC between the fabric layers on the dome section and skirt regions. To investigate the behavior and fracture toughness of a material between the fabric and the fabric layer. The model is regarded as a composite plate, and it is used to carry out fracture toughness, buckling analysis, and testing of composite plates by adjusting delamination sizes using carbon fabric prepare by hand lay-up procedure by producing delamination in between the fabric and the fabric layer. When composite plates were subjected to axial compression, different delamination’s were investigated.To describe the GI, GII, and GIII, a FEM and experimental investigation into the buckling and fracture behavior of carbon fiber reinforced plastic (CFRP) layered composite plates under axial compression is performed in this work. The VCCT approach is used to investigate the influence of fracture length, and the FEM findings are compared to test data.

Keywords:- VCCT, FEM,CFRP, Aerospace Applications,CRMC.

Authors:- Priyanka Singh, Sweety Rathi

Abstract:- Shape memory polymers (SMP) and SMP-based composites are examples of smart materials that may change from a fixed shape to their original structure in response to external stimuli. The shape memory effect is an inherent characteristic of polymers that varies depending on molecular weight and polymer components. They offer intrinsic benefits such as lightweight, large recoverable deformation capability, biocompatibility, and so forth. This research examines the current state of SMP nanocomposites and SMP filler composites in aerospace applications. We will talk about the materials and structures that could be used, as well as the general mechanism of SMPs and their composites, which have a lot of potential for new aerospace applications.

Keywords:- Shape memory polymers, SMP, polymers, composites, aerospace, applications.

 

Authors:- Arvind Goel, Richa Malhotra

Abstract:- The key to effective technology in the future is to adapt to crucial mass customization of the product, which requires the use of the most recent production techniques. This shortens the project cycle time since it takes longer to plan and then execute. The maker must be adaptable. In traditional machining, also known as subtractive machining, material is gradually removed from the stock. Traditional manufacturing procedures put limits on design and can thus be regarded as technology-driven design. On the other hand, additive manufacturing (AM) is frequently defined as technology-driven. AM allows for the production of any complicated design with no technological limits. However, the constraints of AM technology include its repeatability and efficacy in producing key sections while maintaining the required design profile.Furthermore, the confirmation of structural qualities related to design is a constraint of additive manufacturing technology. Additive manufacturing technologies of many sorts are utilised to achieve the necessary qualities of gas turbine engine components. The disadvantage of additive manufacturing is its adaptation to production due to reproducibility. This study discusses design optimization of additive manufacturing components utilising cutting-edge technologies such as Solid Thinking (Inspire, Optistruct, and Materialize) software. The study handles all of these factors in an Additive Manufacturing design, utilising cutting-edge software. A case study of redesigning a bracket in gas turbine engines is provided. This research also emphasised the need foridentifying cost-driven characteristics and selecting material/powder at the preliminary/conceptual design phase of gas turbine components.

Keywords:- Additive manufacturing, Material/Powder selection, Product life cycle.

Authors: Umesha G B, M N Shanmukha Swamy

Abstract: Orthogonal frequency division multiplexing (OFDM) provides an effective and low complexity means of eliminating inter symbol interference for transmission over frequency selective fading channels. This technique has received a lot of interest in mobile communication research as the radio channel is usually frequency selective and time variant. In OFDM system modulation may be coherent or differential Channel state information (CSI) is required for the OFDM receiver to perform coherent detection or diversity combining if multiple transmit and receive antennas are deployed. In practice CSI can be reliably estimated at the receiver by transmitting pilots along with data symbols. Pilot symbol assisted channel estimation is especially attractive for wireless links where the channel is time-varying. In this research work, we investigate and compare various efficient pilot based channel estimation schemes for OFDM systems.

Author: Md. Anwarul Abedin

Abstract: Use of solar energy is rapidly advancing as an important means of renewable energy resource. Solar tracking enables more solar energy to be generated because the solar panel is able to maintain a perpendicular profile to the sun’s rays. The dual axis solar photovoltaic panel is characterized by the capability to move in horizontal and vertical directions. The control circuit for the solar tracker is based on LS Programmable Logic Controller (PLC). The mechanical design consists of rotary joints and two DC motors. This tracking system makes the solar photovoltaic panel more efficient by keeping the panel’s face perpendicular to the sun and therefore extracts maximum solar energy resulting into increased overall efficiency. It detects the sunlight through the LDRs as a sensor and then actuates the DC motors using PLC to position the solar panel where it can receive maximum sunlight. This research study shows that if the movable structures are used in a large scale in a solar power plant, a significant amount (nearly 40%) of more energy can be produced using the same arrays. The proposed control has the capability to be installed in different regions with minor modifications.

Authors: Ashwini B N, Shruthi S Prabhu, Abhilash G 

Abstract: In this paper, implementation of amplitude modulation techniques is presented. In terrestrial television broadcasting, vestigial side modulation (VSB) is used to transmit video signal. SSB modulation is used in frequency modulation to improve the bandwidth. Compared to all amplitude modulation techniques, VSB have tradeoff between power and bandwidth. The different amplitude modulated signals are implemented in Matlab simulink and spectrums are observed.

Authors: Sahil Hamid, Ruchi Sharma, Mahinder Kumar

Abstract: Orthogonal frequency division multiplexing (OFDM) is a well-organized frequently used multicarrier modulation method for high speed data communication over multipath fading channels. OFDM modulation technique offer many benefits for multicarrier transmission at high information rates. One of the major limitations of OFDM is high peak to-average power ratio (PAPR) of the transmitted signal that badly influences the complexity of high power amplifier. Various promising procedures have been anticipated and implemented to decrease PAPR of OFDM signal at the outlay of transmitted signal power, bit error rate (BER), complexity and so on. In this paper, Clipping and Filtering, Selective Mapping (SLM), Partial Transmits Sequence (PTS), tone insertion and tone reservation techniques are discussed briefly for PAPR reduction OFDM signal at transmitter. A brief comparison of these PAPR reduction techniques is done in light of CCDF and BER.

Authors: G.Manjula, Shyamala C

Abstract: In current era, energy is the main factor in designing all the applications, maximum and efficient use of the energy is very important. Conventional methods of displaying images and text in public are using LCD display and dot-matrix LED board. Propeller LED display is a device that project an image or text with least number of LED’s that appear as if they are floating in the air. The floating image is received because of human eye limitation, i.e. because of an illusionary principle persistence of vision (POV), actually the floating images emerge by synchronizing LED'S blink to form an image at particular time and rate. The implementation for the display is done with an advanced RISC based Harvard microcontroller. This platform brings a newer coding and a different understanding of peripherals. The project also aims to build the newer display to work with modern forms of interfaces. The project can be also be implemented with help of any Android Smartphone/tablet running with higher Android versions as the extension of the current work.

Authors: Mahbubur Rahman, Mohammad Ali, Md. Mostofa Hossain

Abstract: The effect of aspect ratio on the airfoil characteristic of NACA 0012 wing is investigated through experiments as a function of angle of attack and also the passive flow separation is controlled by introducing backward facing step to the optimum airfoil. The magnitudes of aerodynamic forces on airfoils resulting from the incompressible viscous flow fields are determined experimentally. Three wing models of different aspect ratios such as AR=2, AR=1 and AR=0.5 of symmetrical airfoils type NACA 0012, are tested in this experiment, with different angle of attack ranging from 0° to 20° keeping the surface area alike. The aerodynamic characteristics such as coefficient of lift, coefficient of drag and coefficient of lift to drag ratio and coefficient of performance for different models is determined from the static pressure distribution. After analyzing the data, it is found that the pressure differences between the upper and lower surfaces are higher for wing model of AR 2 than other two models of AR 0.5 and AR 1.It is observed that the critical angle of attack of all the wing models remain around 12^o beyond which stall occurs but for optimum wing models with backward facing step stall occurs at 14^o. The experimental results also show that wing model with the aspect ratio 2 yields the optimum performance as its lift to drag coefficient ratio is higher than any other models. It is also found that by introducing backward facing step the flow separation is controlled at high angle of attack.

Authors: Nayana C.G, Shruthi S Prabhu, Parameshachari B.D, Rudresh M.D

Abstract: From last few decades many frequency domain speech denoising algorithms have been proposed for the speech enhancement. Purpose of speech enhancement is to improve the quality of speech which is most prominent in telecommunication applications. The main objective of this paper is to develop a time domain speech denoising algorithm which offers superior performance compared to previous approaches. This paper demonstrates the time domain methods of speech denoising called Empirical Mode Decomposition (EMD). EMD decomposes speech signal corrupted by noise into band limiting signals called intrinsic mode functions. Each of the IMF is thresholded directly; on the other hand the IMF’s are divided into frames then thresholded for noise removal. One of the drawbacks of EMD is mode mixing, which is often a consequence of signal intermittency. The mode mixing can be elevated by Ensemble Empirical Mode Decomposition (EEMD) which is the modification of EMD. The performance of the EMD and EEMD algorithm are evaluated for wide range of input SNR’s and good efficiency is derived for EEMD based framed thresholding for speech enhancement.

Authors: Dr. A. Narmada, Dr. P. Sudhakara Rao

Abstract: Radio Frequency Identification (RFID) and Wireless Sensor Network (WSN) are two important wireless technologies that have wide variety of applications and provide limitless future potentials. However, RFID and sensor networks almost are under development in parallel way. Integration of RFID and wireless sensor networks attracts little attention from research community. This paper first presents a brief introduction on RFID, and then investigates recent research works, new products/patents and applications that integrate RFID with sensor networks. Four types of integration are discussed. They are integrating tags with sensors, integrating tags with wireless sensor nodes, integrating readers with wireless sensor nodes and wireless devices, and mix of RFID and sensors. New challenges and future works are discussed in the end.

Authors: Zafar Ansari, Sneha Nagar

Abstract: In this paper we introduce the Position tracking system by using wireless sensor technology. In This paper present the development of the position tracking system's hardware prototype. Specifically, the system will utilize GPS to obtain a object's coordinate and transmit it using GSM modem to the user's phone through the mobile network.[1] an position tracking systems in real time has playing key role in present day scenario. Tracking System consists of a two units: one is Tracker Unit this unit senses the position and stores that information in the database and uses this data to locate the position of the vehicle on the Google maps. This paper a new technique proposed that interfaces database (vehicle information) with the Google maps. That map indicates the position of vehicle and alerts the person who is monitoring the information.[8]

Authors: Nilesh Subhash Nalawade, Anjuman Akbar Mulani

Abstract: According to International Telecommunication Union (ITU), forecasting of telecommunication data is found to be difficult due to uncertainty involved and the continuous growth of data in telecommunication markets as it helps them in planning and determining their networks. So, there is a need of a good forecasting model to predict the future. In this paper, Autoregressive Integrated Moving Average model is utilized for forecasting telecommunication data. This model adaptively uses auto regression, moving average or combined together if required. The major steps involved in the ARIMA model is identification, estimation and forecasting. The adaptive ARIMA model is then applied to M3-Competition Data to do forecasting of telecommunication data. The performance of the model is found out using the evaluation metrics such as Sum of Squared Regression, Root Mean Square Error, Mean Absolute Deviation, Mean Absolute Percentage Error and Maximum Absolute Error. The results proved that the ARIMA models provide 7.6% improvement than the neural network method in forecasting performance.