Vaughn College of Aeronautics and Technology

About: Vaughn College of Aeronautics and Technology is a education organization based out in New York, New York, United States. It is known for research contribution in the topics: Gravitational microlensing & Planetary system. The organization has 727 authors who have published 708 publications receiving 14082 citations. The organization is also known as: College of Aeronautics.

Chapter 1 – introductory

Abstract: Publisher Summary Automatic control systems are vital manifestations of modern technology and pervade almost every area of activity. The development of a new control system usually starts with a specification containing one or more criteria to be met. A theoretical assessment is then carried out of possible arrangements of components that are most likely to comply with the specification. It is these techniques of measurement that are used to evaluate control systems and their components. This chapter is concerned with the evaluation of the parameters of an engineering situation represented by a coupled system of physical components, and to determine a system's behavior. The development of any new control system starts with a customer specification that of a well-engineered system that functions consistently at an economic level. The control engineer is required to produce a much more detailed specification to be met in the subsequent development. This detailed specification is phrased in control engineering terminology and is based on the control engineer's special knowledge of factors that will contribute toward a successful system design.

The design of the DC servo motor controller based on fuzzy immune PID algorithm

Abstract: Conventional parameter-not-adjustable PID controller has a poor dynamic response, and the output cannot follow the input quickly, accurately and stably when dealing with the uncertain parameters, non-linear, wide input system. Current mainstream self-turning algorithms are difficult to transplant to the embedded platform due to the large volume, real-time issue. A fuzzy immune PID algorithm based on the conventional PID controller is put forward to realize the self-tuning of the PID parameters following motor speed value. Against the proportional parameter, it is adjusted according to the mechanism of the human immune system, and its non-linear part is approximated by the fuzzy algorithm; Against the integral and derivative parameters, its self-adjustment is directly realized by the fuzzy algorithm. Finally, the validity of the whole algorithm is verified by using MATLAB / Simulink simulation platform. The hardware of the controller manufacture based on the STM32 produced by St semiconductor is completed and velocity tracking experiments are done. When the servo motor is given 60r/min and 360r/min speed inputs, the response time is within 130ms and the amount of overshoot is below 0.5%. In the case of external disturbance, the speed fluctuation value is within 0.2%. Then the controller is applied to full range chassis and succeeded in controlling it with high precision. Simulation and experiments both show that the controller has good dynamic and static performance, and it can effectively control the servo motor.

The grid-based identity signcryption algorithm and application in Ad Hoc network

Abstract: Identity-based signcryption which guarantees the confidentiality and authentication of message is suitable for the key management of Ad Hoc network due to its low computation cost. Aiming at the deficiencies of the existing identity-based signcryption algorithms, this paper proposes an efficient grid-based identity signcryption algorithm which adopts a low overhand, high expandability and high connectivity grid as the logical structure. By using this signcryption algorithm in the key management scheme of Ad Hoc network, the communication and computation cost of key management is reduced and the safety and efficiency of the key management scheme is enhanced. The analyses show that the Ad Hoc network has a good ability of resistance to the attack when the new signcryption algorithm is used in key management.