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A new active-closed-loop linear time-invariant robust control strategy for reducing drag in a channel flow is presented. Using the theory of passive systems, controllers were designed so as to make the closed-loop system as close to passive as is possible. Physically, this means minimising the maximum bound on perturbation energy production within the system. Although the resulting controllers are...
Ground-penetrating radar (GPR) is a mature remote sensing technique employed by engineers and scientists to obtain information from subsurface structures. These structures range from manmade objects, such as buried utilities, pavements, and unexploded ordnance, to geological formations. GPR data collection may be viewed as a mapping from the object space (x,y,z), characterized by the object's spatial...
Creep stresses and strain rates have been obtained for a thin rotating disc of exponentially varying thickness with inclusion using transition theory. Results obtained have been discussed numerically and depicted graphically. It has been observed that circumferential stress is less for the disk whose thickness decreases exponentially along radius as compared to the flat disk. With the introduction...
A robotic assembly sequence is considered to be optimal when it minimizes assembly cost while satisfying the process constraints. The assembly cost relates to assembly operations, assembly motions and assembly direction changes. The work utilizes an ant colony optimization (ACO) for generation of robotic assembly sequences. The method relates the assembly cost to an energy function associated with...
The accurate modeling of the MOSFET channel capacitance has evolved from Meyer's reciprocal gate capacitive models to Ward's charge-based, channel partition models. Numerous models have also been proposed to represent trans-capacitive and charging current components. Recently, a solution to separate the transport and charging current components for SOI MOSFET's was proposed. The model also verified...
CORDIC stands for crdinate rotation digital computer, is an algorithm developed to compute trigonometric function through series of rotation. Para-CORDIC is the latest method of implementation of CORDIC equations and has an advantage over other implementation algorithm in terms of speed and accuracy. This paper presents the implementation of para-CORDIC algorithm and its applications in satellite...
It is well established that the position co-ordinates of the receiving antenna should be determined precisely in advance for getting Time of the GPS receiver through a single GPS satellite technique. So it is desirable to know the extent of accuracy of the position co-ordinate required for a particular timing accuracy. In this paper, an analytical expression relating to the position error and the...
There is an increasing demand of Biosensors many branch of science and technology. The Ion Sensitive Field Effect Transistor (ISFET) is one of the most essential components of ion sensing biosensor. ISFET is a field effect transistor having ion sensing capability. It has got countless potential to fabricate sophisticated sensing devices. In this article, an effort has been taken to ascribe the effect...
The paper presents hardware efficient design of digital signal processing (DSP) based bit synchronizer and lock detector circuit for bi-phase data. The system is developed for one of the payload of Chandrayaan-I mission, and tested for its performance. Apart from the implementation, paper describes the mathematical modeling of bit synchronizer. The whole design is accommodated in a single Actel-1280...
This correspondence examines the possibility of recursive prediction for the daily maximum temperature based on a state variable model. It is shown that past data can be processed for identifying a suitable noisy state model for this process. Once the model is selected the ``corrector-predictor'' algorithm of Kalman is readily applied for predicting the daily maximum temperature for a chosen lead...
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