Membership Function 1 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 0 0 40° -20° 0° 20° 40° -150°-100°-50° 0° 50° 100° 150° 1 0.8 0.6 0.4 0.2 0 -10 -5 0 510Membership Function -40° -20° 0° 20° 40° 0 0.2 0.4 0.6 0.8 1 -150° -100° -50° 0° 50° 100° 150° 0 0.2 0.4 0.6 0.8 1 -10 -5 0 5 10 0 0.2 0.4 0.6 0.8 1   f