This In the construction elevator with high-speed inverter based on the single-chip microcomputer and single speed sensor, the response of the automatic smooth layer system is often too slow to guarantee the accurate leveling lift, so the system needs frequent calibration. This paper presents a fuzzy algorithm based elevator automatic leveling system using STC controller. Test results show that, under the condition that the load vary frequently and hoist cage fall inertia, the system can predict elevator weight-bearing state or delay in advance to control the inverter.template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text. Please make the page settings of your word processor to A4 format (21 x 29,7 cm or 8 x 11 inches); with the margins: bottom 1.5 cm (0.59 in) and top 2.5 cm (0.98 in), right/left margins must be 2 cm (0.78 in). We shall be able to publish your paper in electronic form on our web page http://www.scientific.net, if the paper format and the margins are correct. Your manuscript will be reduced by approximately 20% by the publisher. Please keep this in mind when designing your figures and tables etc.