motionModel.m
上传用户:zfsfly
上传日期:2018-05-24
资源大小:71k
文件大小:2k
- function [ X ] = motionModel( X, action )
- % ------------------------------------------------------------------------------------------------------
- % function [ X ] = Prediction( X, action )
- %
- % Usa un modelo probabilistico para dar el siguiente estado "x" dado el anterior
- % y la "accion" que se ha realizado. En este caso:
- % x: Es un vector 3x1 de la pose del robot.
- % action: Es un vector 3x1 del cambio de pose que se ha mandado al robot
- % como accion (Ax Ay Aphi)
- %
- % J.L. Blanco - University of Malaga, Spain
- % ------------------------------------------------------------------------------------------------------
- % ------------------------------------------------------------------------------------------------------
- % Copyright (c) 2007 Jose Luis Blanco Claraco.
- %
- % Permission is hereby granted, free of charge, to any person obtaining a copy of
- % this software and associated documentation files (the "Software"), to deal in
- % the Software without restriction, including without limitation the rights to
- % use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- % of the Software, and to permit persons to whom the Software is furnished to do
- % so, subject to the following conditions:
- %
- % The above copyright notice and this permission notice shall be included in all
- % copies or substantial portions of the Software.
- %
- % THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- % IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- % FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- % AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- % LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- % OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- % SOFTWARE.
- % ------------------------------------------------------------------------------------------------------
- M = size(X,1);
- N = size(X,2);
- N0 = N - 3; % The first index of the last "triplet"
- Ax = action(1);
- Ay = action(2);
- Ap = action(3);
- Axy = sqrt(sum(action(1:2).^2));
- stdX = 0.01 * abs(Ax) + 0.01*Axy;
- stdY = 0.01 * abs(Ay) + 0.01*Axy;
- stdP = 0.02 * abs(Ap) + 0.05*Axy;
- ccos = cos(X(:,N0+3));
- csin = sin(X(:,N0+3));
- Ax2 = Ax + randn(M,1) * stdX;
- Ay2 = Ay + randn(M,1) * stdY;
- Ap2 = Ap + randn(M,1) * stdP;
- X(:,N+1) = X(:,N0+1) + Ax2 .* ccos - Ay2 .* csin;
- X(:,N+2) = X(:,N0+2) + Ax2 .* csin + Ay2 .* ccos;
- X(:,N+3) = X(:,N0+3) + Ap2;