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To ensure the optimal use of spectrum, when the primary user or spectrum quality deterioration occurs, the secondary users need to change the spectrum, which is called as the spectrum mobility. The new handoff is called as the spectrum handoff. Among the key technologies in Cognitive Radio Networks, spectrum handoff has received extensive concern from both academia and industry. Switching request...
This paper presents an upper limb rehabilitation robot based on 3-RRC parallel mechanism. The device has three degrees of freedom and can help the disabled patient to do rehabilitation training by moving his/her arm in three-dimensional space. The paper set up the control platform, built the mechanism model and analyzed the kinematics of the selected 3-RRC parallel mechanism. Then, it was verified...
An equipment has been designed with PLC used as centre control unit, as well as specific function modules of analog processing and communication, to simulate the operation of electric steering gear. PLC receives signals and controls the rolling of stepper motor to realize this simulation process. The equipment provides three kinds of operation modes: button, HIM and remote control, and it can help...
Based on multiple gain programming PID control algorithm, a new heading controller for saving the energy is designed to reduce drain on manpower and material resources, so as to adapt to the current environment about energy conservation and emission reduction. By using matlab/simulink software, the results are showed that the controller has a very good control effect and has been achieved the control...
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