public void setDt(double dt) {
		for (Component e : subPanel.getElements()) {
			e.reset();
			if (e instanceof DynaSys)
				((DynaSys) e).setDt(dt);
			else if (e instanceof ApproxDif)
				((ApproxDif) e).setDt(dt);
			else if (e instanceof Integration)
				((Integration) e).setDt(dt);
		}
	}