Abstract: This paper describes the design and implementation of a ROM-Less Direct Digital Frequency Synthesizer (DDS) using Bezier curve approximation. With Bezier curve approximation, phase values between 0 to π are mapped to sine amplitudes. Then, half wave symmetry of sine wave is exploited to construct full sine wave. The proposed approximation introduces maximum error of 7.9x10-6, which is equivalent to quantized sinusoid with 16-bit amplitude resolution. This yields very high spectrally pure sine wave output. Based on the approximation, DDS circuit is designed and validated in Matlab-Simulink

• Publication Date: 12-Mar-2012
• DOI: 10.15224/978-981-07-1847-3-868
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Abstract: An Internet based boiler drum level control system is developed, which enables the students for deeper understanding of the boiler theory, the real experiences on design and implementation of control system. In this work, remote accessed virtual laboratory for 3 types of control of boiler is established using the internal model control (IMC) method. The student can access the remote laboratory and perform experiments without any limitation of time and location by using internet. They can also observe the system performance by changing the set point of the experiment and evaluate the results. Internet based laboratory is cost-effective.

• Publication Date: 12-Mar-2012
• DOI: 10.15224/978-981-07-1847-3-871
• Views: 0
• Downloads: 0