Self-propelled hydraulic lift can lift synchronous control in open loop and closed loop control. Open-loop control of the output back to the input is not self-propelled lifts video, but the use of the various components of the hydraulic system of their own design and manufacture of precision to achieve self-propelled lifts synchronization control, nonlinear due to leakage of the hydraulic system, components, self-propelled lifts parameters, resulting in imprecise control. Closed-loop feedback control the detected output to the input, suppress unfavorable factors, self-lifts manufacturers, accused of making a plurality of actuators to achieve high precision synchronization. Self-propelled lifts have self-propelled aerial work platforms, with automatic walking function, Beijing self-lifts, it is possible under different working conditions, fast, slow walk, only one person can complete a row up and down in the air, move forward, backward, turn and all other actions. Particularly suitable airport waiting floor, stations, terminals, shopping malls, stadiums, residential property, factories and other large-scale shop-altitude operations. Self-propelled lifts manufacturers, self-propelled lifts manufacturer, Beijing self-lifts from Jinan blue sky Lifting Machinery Limited. Jinan blue sky Lifting Machinery Co., Ltd. (www.ltsjpt.com) (www.xcsjj.com) is a leader in Jinan, hydraulic machinery and parts, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In the sky lift leadership with the staff warmly welcome all inquiries negotiations to create a better future for the sky lift.