Recent content by Illgresi

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    Second Order Approximation to Transfer Function

    Thanks for the reply! The transfer function G(s) I described is the original system parameters. The coursework revolves around finding a suitable compensator to control the system. I must admit that question 7 is somewhat confusing, perhaps I could post the whole thing... I have succesfully...
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    Second Order Approximation to Transfer Function

    Ok, I think I've figured it out. I think I was over complicating the problem in my head. Is this correct? ξ = 0.404 (from %O = 125%) ωn = √2360 → Ts = 4 / (ξ·ωn) = 0.204 s ?
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    Second Order Approximation to Transfer Function

    Hi all, hopefully this is in the correct section here. Any help is really gratefully received. 1. Homework Statement I have a coursework, one question asks us to use a 2nd order approximation of the transfer function to..."estimate the settling time (5% of the settling value of output, peak...
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    Analyzing RTD/Wheatstone Bridge Circuit: Varying R2 and R3 Values

    Ah I see the confusion. I'll use this image to try to explain more clearly. Let's assume Rx is our RTD. Rx = 100 Ω when T = 0 °C and Rx = 138.5 Ω when T = 100 °C. At 0 °C we want Vb = 0 V, therefore Rb must = 100 Ω i.e. in order for the circuit to be balanced. Using the bridge formula, Ra =...
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    Analyzing RTD/Wheatstone Bridge Circuit: Varying R2 and R3 Values

    Hi, thanks for the reply. Not sure I follow what you mean. I understand what a non-monotonic function is, a quadratic is non-monotonic, but I can still solve a quadratic equation to find the stationary points.
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    Analyzing RTD/Wheatstone Bridge Circuit: Varying R2 and R3 Values

    Homework Statement Currently writing a report about a Wheatstone Bridge circuit with RTD sensor. The sensor is to work between 0°C and 100°C and output 0 mV to 10 mV. Rx has a nominal resistance, Rn of 100 Ω, Vs=10 V and α=0.00385 °C-1. Therefore RT = 138.5 Ω Assuming RT is in the bottom...
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    Discerning the Elasticity Modulus of Brittle Cast Iron from Test Data

    FYI, I've solved the problem.
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    Discerning the Elasticity Modulus of Brittle Cast Iron from Test Data

    Hi, thanks for the reply, although I don't quite follow. I'm aware that using 0.2% proof stress is the done thing unless the material shows yield point behaviour. What I'm having difficulty with is calculating the Young's Modulus. As I state above, my figure of 22.5 GPa is more inline with...
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    Discerning the Elasticity Modulus of Brittle Cast Iron from Test Data

    Here goes try number two, the forum deleted my last post. :cry: First time poster, so hopefully I'm following the rules, I do apologise if I'm not. I have a problem with my lab report, I would be very grateful if anyone could help. Thanks. Homework Statement I'm writing a tensile test lab...