Contents
Is resonance frequency affected by resistance?
The presence of the resistance also reduces the peak resonant frequency of damped oscillation, although the resonant frequency for driven oscillations remains the same as an LC circuit. Some resistance is unavoidable in real circuits, even if a resistor is not specifically included as a separate component.
What is resonance frequency explain it?
The resonant frequency is the characteristic frequency of a body or a system that reaches the maximum degree of oscillation. In an electrical system, the resonant frequency is defined as the frequency at which the transfer function reaches its maximum value. Thus for a given input, the maximum output can be obtained.
What are the resonance condition?
resonance: In an electrical circuit, the condition that exists when the inductive reactance and the capacitive reactance are of equal magnitude, causing electrical energy to oscillate between the magnetic field of the inductor and the electric field of the capacitor.
What is the relation between frequency and resistance?
R is the nominal value of the resistor. L is the stray inductance. But at very high frequencies say ω = R/2πL and higher, the Inductance value will dominate and the Reff would be much higher. And it will increase with frequency.
What is the principle of resonance?
This is known as resonance – when one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion. The word resonance comes from Latin and means to “resound” – to sound out together with a loud sound.
What is the example of resonance?
Pushing a person in a swing is a common example of resonance. The loaded swing, a pendulum, has a natural frequency of oscillation, its resonant frequency, and resists being pushed at a faster or slower rate.
What is the purpose of frequency ambiguity resolution?
Frequency ambiguity resolution is used to find true target velocity for medium pulse repetition frequency (PRF) radar systems. This is used with pulse-Doppler radar .
How is aliasing related to range ambiguity resolution?
Radar pulsing causes a phenomenon called aliasing, which occurs when the Doppler frequency created by reflector motion exceeds the pulse repetition frequency (PRF). This concept is related to range ambiguity resolution. Doppler frequency shift is introduced onto reflected signals used by radar.
When is frequency ambiguity required to obtain the true radial velocity?
Definition. Frequency ambiguity resolution is required to obtain the true radial velocity when the measurements is made using a system where the following inequality is true. The radial velocity measurements made in this way produce a modulo function of the true radial velocity.
How is the ambiguity function represented in radar?
A more concise way of representing the ambiguity function consists of examining the one-dimensional zero-delay and zero-Doppler “cuts”; that is, , respectively. The matched filter output as a function of time (the signal one would observe in a radar system) is a Doppler cut, with the constant frequency given by the target’s Doppler shift: .