In order to improve the efficiency of identifying parameters using the maximum likelihood method and to avoid the sensitivity of initial values, a proposed method that combines the advance and retreat method with the micro-genetic algorithm allows the initial value, the iterative increment, and the search interval to be gradually changed, and the initial value to start from zero, which ensures a stable and fast convergence compared with other algorithms.

Compared with the hydrostatic CVT used in the current cotton picker, the hydrostatic power split CVT has lower energy and fuel consumption. However, this kind of transmission usually has multiple speed regulation ranges, and the adjacent two ranges will produce impact and affect the driving comfort when shifting. In this study, the shift process of a hydrostatic power split CVT was analysed, and the results prove the feasibility of the application of this kind of CVT in the cotton picker.

This paper reviews the state-of-the-art trajectory tracking of autonomous vehicles. Autonomous vehicles have become more and more popular with the development of artificial intelligence and automatic control. If you have any interest in the trajectory tracking of autonomous vehicles, this paper is the one that you can not miss. It will give you a brief concept of the current development of the trajectory tracking of autonomous vehicles.

1. A new type of MRE torsional vibration absorber (TVA) is devised. The modal analysis, the frequency tracking scheme, and the damping effect are intensely studied. 2. A transient dynamic simulation is carried out to validate the rationality of the machine structure. The magnetic circuit simulation analysis and the magnetic field supply analysis are performed to substantiate the intellectual of the TVA. 3. A special test rig is built to assess the frequency shift characteristics of the TVA.

A program is designed for the myoelectric hand with two control pathways, one for the thumb (controlled utilizing medial nerves) and the second for the rest of the fingers (controlled by the side nerves). The robotic hand was first printed with the use of a 3D printer.

A novel bench-scale suspension plant, using magnetorheological elastomer (MRE)-based absorbers accompanied with an adaptive and global neural-network-based tracking controller, is introduced. The global adaptive neural network is used to estimate the uncertain dynamics of the quarter-car model. An auxiliary design system was added to the controller to deal with input constraint effects, and the state was analyzed for its tracking stabilization. All the signals are global, uniform, and ultimate.

Our investigations concern the dynamics of drillstring, experiment apparatus for simulating drillstring vibration was established. Hammering method is used to measure drillstring lateral natural vibration frequency when the internal and external drilling fluid is considered. The test results show that the drilling fluid can decrease the natural frequency of the drillstring. Additional mass coefficient can get the result with high precision, which can meet the needs of the project.