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A set of explicit expressions for an accurate identification of unstable first order plus time delay (FOPTD) process using single relay feedback test are deduced. Thereafter, tuning rules for a feedforward and feedback combination of proportional-integral and proportional controllers are proposed to enhance the closed loop transient performance. When the process output is distorted by measurement...
The design and characterisation of a miniaturised 100 MHz antenna based on magnetoelectric (ME) composites are discussed. Ferrite - ferroelectric composites with high and equal permeability mur and permittivity epsivr have been synthesised and used as the substrate for a microstrip antenna. The composite also facilitates impedance matching to free space. A sample of nickel zinc ferrite and bismuth...
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