This paper analyzed the performance of aggregation tree constructing algorithms and proposed a global energy-efficient aggregation tree constructing algorithm based on greedy incremental tree.

,the active control method,global control method and variable replacement method.

In this report, firstly we will investigate the global controllability of gen-eral planar affine nonlinear systems under l.

Discussion on energy saving control mode under low load operation of power units;

Research on energy saving control simulation of digging robot based on virtual prototype technology;

Study on soft-start with three-phase AC voltage adjustment for three-phase asynchronous motor and on energy saving control;

Only energy saving of hydraulic system could not obtain ideal energy saving effects of the whole machine,and engine control had great influences on the whole machine saving.

Through energy saving control of central air conditioning,the purpose of significant reducing the energy consumption is reached.

Hydraulic excavator is a kind of construction equipment with high power, and the energy saving controls will directly affect the economics and reliability of the excavator.