International Forum on Strategic Technology 

About: International Forum on Strategic Technology is an academic conference. The conference publishes majorly in the area(s): Control theory & Electric power system. Over the lifetime, 1461 publications have been published by the conference receiving 4797 citations.

Research and implementation of RSA algorithm for encryption and decryption

Abstract: Cryptographic technique is one of the principal means to protect information security. Not only has it to ensure the information confidential, but also provides digital signature, authentication, secret sub-storage, system security and other functions. Therefore, the encryption and decryption solution can ensure the confidentiality of the information, as well as the integrity of information and certainty, to prevent information from tampering, forgery and counterfeiting. Encryption and decryption algorithm's security depends on the algorithm while the internal structure of the rigor of mathematics, it also depends on the key confidentiality. Key in the encryption algorithm has a pivotal position, once the key was leaked, it means that anyone can be in the encryption system to encrypt and decrypt information, it means the encryption algorithm is useless. Therefore, what kind of data you choose to be a key, how to distribute the private key, and how to save both data transmission keys are very important issues in the encryption and decryption algorithm. This paper proposed an implementation of a complete and practical RSA encrypt/decrypt solution based on the study of RSA public key algorithm. In addition, the encrypt procedure and code implementation is provided in details.

The new MPPT algorithm using ANN-based PV

Abstract: In grid connected photovoltaic (PV) systems, maximum power point tracking (MPPT) algorithm plays an important role in optimizing the solar energy efficiency. In this paper, the new artificial neural network (ANN) based MPPT method has been proposed for searching maximum power point (MPP) fast and exactly. For the first time, the combined method is proposed, which is established on the ANN-based PV model method and incremental conductance (IncCond) method. The advantage of ANN-based PV model method is the fast MPP approximation base on the ability of ANN according the parameters of PV array that used. The advantage of IncCond method is the ability to search the exactly MPP based on the feedback voltage and current but don't care the characteristic on PV array‥ The effectiveness of proposed algorithm is validated by simulation using Matlab/ Simulink and experimental results using kit field programmable gate array (FPGA) Virtex II pro of Xilinx.

Design method of CAN BUS network communication structure for electric vehicle

Abstract: According to the communication structure of CAN BUS network on EV, this paper works out a SAE J1939 application layer protocol meet the system functional requirements, and designs the software and hardware for the system. First, design the CAN BUS work nod for EV, including the master node, the light node, air conditioning node, doors and instrument node, etc, and the draw the CAN BUS topology diagram. Meanwhile, according to the concrete situation of EV, work out an application layer protocol that consistent with the SAE J1939 protocol, and the information allocation table and message structure chart of CAN BUS network node is also presented. Secondly, design the hardware and software for the CAN BUS communication network. Hardware interface circuit mainly consist of CAN communication controller SJA1000, high-speed opt coupler 6N137 and CAN BUS driver 82C250, and design schematic circuit diagram for CAN bus system hardware. The software designs for CAN BUS network are mainly the design of CAN BUS data communication and exchange between nodes, and communication processing for switch-signal, analog signal. The design of software communication module includes CAN initialization unit, message sending unit, message receiving unit and the interrupt service unit. Finally, the CAN BUS network communication system the paper designed is applied to the new energy bus produced by CENS Energy-Tech Co., Ltd. which is dedicated in the Shanghai World Expo. From the battery voltage data collected when EV are running, we can see that the system is accurate, stable without number lost, frame dropping and transfer error in data communication. The design has practical value promoting the application of new energy vehicles.

Modeling and control of quadrotor MAV using vision-based measurement

Abstract: In this paper we review the mathematics model of quadrotor using Lagrange's equation. We propose a vision-based measurement to stabilize this model. A dual camera method is used for estimating the pose of the quadrotor; positions and attitudes of the quadrotor MAV. One of these cameras is located on-board the quadrotor MAV, and the orther is located on the ground. The control system is developed in Matlab/Simulink. In this paper, we consider a linear controller for our purpose. Linear Quadratic tracking controller with integral action, and Optimal Linear Quadratic Gaussian (LQG) control with integral action are designed for stabilization of the attitude of the quadrotor MAV. Moreover, some measurement noises will be considered in the controller design, too. Finally, this paper will demonstrate how well this control works for a certain flight mission: quadrotor MAV on the ground, and then starting hover, sideway move and keeping the position with a pointing to a certain object fixed in space.

A PID backstepping controller for two-wheeled self-balancing robot

Abstract: This paper presents a method to design and control a two-wheeled self-balancing robot and it focus on hardware description, signal processing, discrete Kalman filter algorithm, system modelling and PID backstepping controller design. In the system, signals from angle sensors are filtered by a discrete Kalman filter before being fed to the PID backstepping controller. The objectives of the proposed controller are to stabilize the robot while try to keep the motion of robot to track a reference signal. The proposed PID backstepping controller has three control loops, in which the first loop uses a backstepping controller to maintain the robot at equilibrium, the second loop uses a PD controller to control the position of robot and the last uses a PI controller to control the motion direction. Simulations and experimental results show that the proposed control system has good performances in terms of quick response, good balance, stability .