# Questions tagged [control-systems]

The tag has no usage guidance.

70 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
253 views

### Digital control: Exercise solution

Can you help me (show me how) to solve the following exercise? For the process with transfer function $G(s)=e^{-2s}/(s+1)$ design a digital controller with sampling time $T_{s} = 1$ that meets the ...
• 141
1k views

### How do I check controllability and observability using Gramian matrixes?

I have a pending exam and this is one of the must-know questions. It will be about checking controllability/observability of a simple MIMO linear system, using Controlability Gramian/Observability ...
• 233
113 views

### Optimal inference for nonlinear state space models

When considering a linear-Gaussian state space model, it is often referred that, optimal inference is tractable which is very rare in state space models. When considering a nonlinear state space model,...
• 648
75 views

### PID Tuning for 6 degree of freedom robot with ROS

I'd like to start by saying that I'm pretty clueless about controllers, control theory, or really anything to do with this subject. I'm a programmer, but I'm part of a project involving a 6 degree of ...
50 views

### Direct and numerically robust conversion from zero-pole to state-space representation

Note: this question was initially asked in a different community. Encouraged by the comments, I decided to cross-post here too. Given (z,p,k) my goal is to convert to a state-space representation (A, ...
• 21
46 views

### Implementing digital controller in the time domain

I have simulated a digital control system in the Z domain using MATLAB and I have got satisfactory results. However, when I converted the plant and the digital controller to difference equations and ...
• 121
156 views

### Non-rectangular meshgrid in MATLAB

I want to create a non-rectangular meshgrid in matlab. Basically I have a polygon shaped feasible set I need to make a grid of in order to interpolate 3D data points in this set. The function for ...
• 23
80 views

### Are there control loops that attempt to maximize a process variable?

I'm working on Remote-Procedure Call (RPC) server that processes incoming streams of data from clients, and looking for a way to set a limit on the number of simultaneous streams allowed. There is ...
• 121
48 views

• 394
28 views

### Peak prediction

In my block, I am changing the gain of Amplifier (PGA) in step of +/- 1dB depending on the control voltage derived from the AGC (Automatic Gain Control). But can I change the gain of PGA in one shot ...
• 11
13 views

### Advantages of Euler vs Quaternion vs Axis-Angle Paramertization

I have spent a bit of time studying attitude estimation and I noticed that uncertainty of orientation can basically be represented in three forms. Euler angles, Axis Angle and Quaternions. Quaternions ...
• 854
42 views

### Smoothing sensor signal with discontinuities on DSP for obtaining signal derivative

I am trying to implement PID control on a sensor signal that has many discontinuities in it. Due to these discontinuities, the differentiated signal does not provide a meaningful or useful signal I ...
102 views

### Performing experiment on a digital control system

I want to perform experiment(s) on a digital control system. I have several questions: In analog control systems, the adder is usually an operational amplifier. However, since here the system will be ...
27 views

### Desired trajectory generation from transfer function in control theory

I am trying to implement the backstepping techniques for quadrotor described in this article : Backstepping control for a quadrotor helicopter: Madani & Benallegue 2006 Since I am new to the ...
• 21
20 views

### how does steady-state error decrease as the pole of the compensator moves closer to the origin?

The steady-state error improves when the pole moves closer to the origin, as seen in lag or integral compensators with step input. Is there an intuitive explanation for this phenomenon?
• 131
49 views

### control system : time domain analysis

This is the question. According to this, when we solve for transfer function we will get $20/s^2+5s+24$. but this is not the correct format as numerator should be equal to the last term, i.e., 24, in ...
12 views

### Difference between H2 control and input shaping

Let us assume a system with external disturbance to reject. The system that is used for controlling has vibrations, that we would like to avoid. We assume moreover that the dynamics are known (10% ...
• 11
140 views

### Finding the region of stability of a system

Suppose we have a closed loop system controlled by some microcontroller $K$ First we take the open loop gain which is $\frac{K}{s(s+6)}$.It has 1 pole at the origin and at $s=6$ and 0 zeros. So we ...
• 295
38 views

### What is the point of using this derived PID controller?

Previously, I answer for this PID controller that I want to understand completly. This is used for control the opening $U_n$ of a valve let gas pass and reach a certain pressure (SetPoint). There is ...
26 views

### Output signal for space-state

I have a space-state system and I need to find the output signal of it. Can anyone here explain to me how to do it? My soluation: is it a right answer?
26 views

### Step response of a given input and output (Laplace or Fourier)

I am trying to calculate the step response of the following given: Should I use Laplace transform or Fourier transform?
56 views

### How to find response of step function in matlab and plot transfer function?

I have an transfer function: $$\frac{Y(s)}{F(s)} = \frac{s^2+2s+3}{s^4+6s^3+13s^2+12s+9}$$ How can I find $Y(s)$ response of step function if $f(t)=\sin(5t)$ in MATLAB. And how can I plot the transfer ...
390 views

### Is it allowable to place a zero to cancel out a complex pole?

Consider the following transfer function : $$T(s)=\frac{4}{s^{2}+2s+4}$$ I wish to design a lead-lag compensator satisfying a set of requirements. What matters for now is the process done to meet ...
• 165
26 views

### How can we translate this statement into an input signal expression?

I want to make sure if I got this right, the following statement: if the operator enters a unity sloped linearly increasing input then the output must eventually track the input and be at most 0.1 cm ...
• 129
54 views

### what is the difference between LMS and MPC?

I do understand that MPC is a control method and requires known model in the feedback path. LMS, on the other hand, is more like an adaptive filtering, which estimates the tap coefficients yielding ...
• 35
60 views

### How to handle cross products in feedback loop?

I'm trying to simplify the following block diagram from to the following block diagram However, h(t), H(s) in time domain, has a cross product in it (gyroscopic torque). How can I represent the ...
18 views

### music sampler control

I'm a reasonably competent web programmer and I would like to know how I should go about learning to program a software that would control a music sampler. The hardware setup I was given is a sampler (...
• 101