In order to improve the design of the throttle, a certain throttle is taken as the research object, and its flow coefficient is studied. Investigate the flow line characteristics of the throttle valve flow channel and the value of the flow coefficient of the throttle valve, use Fluent fluid software to perform numerical simulation analysis on the throttle valve flow channel, study the relationship between the throttle opening and the switching stroke, and simulate Calculation results The chamfer design of the throttle valve has a great influence on the initial section of the flow coefficient curve, and the opening range of the valve that can accurately control the flow rate is obtained.

Parallel robot has advantages of no friction and clearance, fast response, compact structure, good rigidity, and low error accumulation, but they also have many shortcomings in geometric characteristics, such as small range of motion, poor flexibility, and singularity in the workspace. Adding redundancy can improve its geometric characteristics. Parallel robots are usually controlled by dedicated controllers, without openness, high development costs, and long cycles. This paper introduces the design of an open control system for a three-DOF redundant drive robot based on PC bus, and with "PC + motion control card" as the core.

This study systematically investigates the hot deformation behavior and microstructural evolution of AA3102 aluminum alloy through isothermal uniaxial compression tests conducted at 400–550 °C and strain rates of 0.01–10 s⁻¹. Previous studies on 3xxx-series Al–Mn alloys have mainly considered temperature and strain-rate effects while neglecting strain-dependent material parameter variations, limiting prediction accuracy under large deformation and obscuring dynamic softening mechanisms. Here, the experimental flow stress data were corrected for interfacial friction and adiabatic temperature rise. A sixth-order strain-compensated Arrhenius constitutive model was then developed to describe the coupled effects of temperature, strain rate, and strain. Full-strain-range power dissipation and flow instability maps were constructed using the dynamic material model, while optical microscopy and DEFORM-3D simulations were employed to clarify microstructural evolution and deformation inhomogeneity. The model achieved a correlation coefficient of 0.9841 and an average absolute relative error of 3.67%, demonstrating high predictive accuracy. No flow instability was detected within the investigated range, indicating excellent hot formability. The favorable compression-processing window was identified as 500–550 °C and 0.1–1 s⁻¹, while the peak power-dissipation efficiency increased from 30.55% at $\epsilon = 0.2$ to 32.90% at $\epsilon = 0.8$. Optical-microstructural observations suggest that increasing temperature and decreasing strain rate are associated with an increasing contribution of dynamic recrystallization relative to dynamic recovery. Finite-element results further reveal pronounced spatial variations in strain, temperature, strain rate, and stress during compression. These findings provide baseline constitutive and thermomechanical information for subsequent AA3102 hot-extrusion optimization.

Silicon is a promising anode for solid-state lithium batteries because of its high theoretical capacity, but large lithiation-induced volume changes and unstable electrode/electrolyte contact remain major challenges. Here, a contact-adaptive solid-state silicon (Si) architecture is developed by coupling an electrostatically assembled silicon/reduced graphene oxide (Si@rGO) nanosheet anode with a poly(ethylene oxide) (PEO)–lithium bis(trifluoromethanesulfonyl)imide (LiTFSI)–ethylene carbonate (EC) electrolyte reinforced with 10 wt% Ta-doped Li_6.5La₃Zr_1.5Ta_0.5O₁₂ (LLZTO), hereafter denoted PEC-T. Trace EC promotes Li-salt solvation and PEO plasticization, while LLZTO suppresses polymer crystallization and reinforces ion transport. PEC-T shows a reduced melting temperature from 66.7 to 51.4 °C, improved tensile strength and elongation, an ionic conductivity of 3.0 × 10⁻⁴ S cm⁻¹ at 30 °C, a Li⁺ transference number of 0.57, and an oxidative stability limit of ~4.5 V. It also supports stable Li plating/stripping for 600 h at 0.1 mA cm⁻². Meanwhile, the rGO framework mitigates irreversible Si thickness evolution and preserves interfacial integrity. Consequently, Si@rGO/PEC-T/Li batteries deliver strong rate capability and maintain 1.8 Ah g⁻¹ after 250 cycles at 1 C, demonstrating a coupled chemo-mechanical strategy for stable solid-state silicon batteries.

A hydraulic control system for tank cleaning robot based on PLC was designed to afford the operating safety and flexibility. Firstly all component elements of the hydraulic control system were confirmed after analyzing the structural characteristics and functions of the robots. Secondly, on the basis of working principle and process of every component element, a hydraulic system circuit was designed for the robot and the achieving process of every component element was analyzed. Last, the PLC control system were respectively devised.