Adolfo Silva

13 Questions 21 Answers 0 Followers

Questions related from Adolfo Silva

How to get the model shape matrix from Nastran?

I need to include the bending mode dynamics in my simulation. So far, I am only considering the rigid body dynamics. So I need to implement the following equation: q'' + Kg*q = Phi*F(t), where:...

20 November 2020 4,449 5 View

How to prove that open loop transfer function, L(s), will approximate the target loop shape in this H Infinity setup?

Assuming that, the H-infinity norm of the transfer function H(s) is less than 1 + delta, where delta is a small number. How to prove that open loop transfer function (at the input plant), L(s),...

15 December 2016 619 6 View

Which is the correct (if there is any) to implement a gain-scheduling PI-D controller?

The control signal of a fixed gain PID controller (presented in the link below) can be written as y(t) = Kp u(t) + Ki int{u(t)} + Kd(t) d/dt{u(t)}. Note in the figure that, the error signal is...

13 June 2016 7,917 5 View

I have doubts about the non-parametric identification method, frequency response, which is the best sequence to implement digitally?

I have a previous knowledge of the system, so I've the lower and upper bound of the frequency response test. I'm performing the response frequency test, as follow:The input to the system is given...

01 October 2015 9,194 8 View

Which is the best option to make a Mach hold controller to an aircraft?

What is the best way to control the speed during the cruise phase of an airplane? I'm wondering which is the best way, because in theory I can control the speed manipulating the thrust given by...

21 September 2014 6,853 4 View

What do you think of the mathematical model of Brushless DC Motor vs Brushed DC?

A simplified mathematical model of Brushed DC motor can be easily find in the many control theory books. The mathematical model is composed by the electrical constant: inductance, resistance and...

04 August 2014 2,812 2 View

Simplified transfer function, how accurate is that?

After the linearization of the non-linear equations around an equilibrium point, I got the following transfer function: G(s) = a1 s + a0/(s³+b2s²+b1s+b0) or G(s) = K (s + z) / (s+p) (s²+2wns +...

13 January 2013 5,519 17 View

Solution Manual Digital Control of Dynamic System 3rd edition

I'm studying digital control by myself, and I would like to know if has available on the internet the solutions manual of "Digital Control of Dynamic System 3rd edition"?

03 January 2013 2,589 16 View

Software to draw Vectors and coordinate system?

I'm looking for a software to draw coordinate system{x,y,z} and vector! The software must be able to draw angles beetween the vectors and has to be able to put 3 D vector not only 2D.

09 November 2012 7,700 4 View

Does anyone know how to model error in gimbal system axis?

The navigation system can measure the attitude (EULER ANGLES) through 2 technologies, strap-down and gimbal systems. If the gimbal axis is not aligned with the "inertial axis (because some...

09 November 2012 1,635 1 View

What is the best software to draw control block diagram?

I'm writing my thesis and I am searching for good software to draw control block diagrams! Any suggestion? Thank you!

25 September 2012 5,016 53 View

Satellite Control

Anyone in this group work or already have worked with satellite attitude control?

19 May 2011 4,841 2 View

Monte Carlo Simulation Analysis of a Dynamic System

Suppose a six degree of freedom simulation of an aircraft, which some aerodynamic parameters (e.g: stability derivatives), mass configuration (e.g center of mass) and etc, are randomly choose...

01 January 1970 255 4 View