Nonlinear Adaptive Control with Asymmetric Pressure Difference Compensation of a Hydraulic Pressure Servo System Using Two High Speed On/Off Valves

Gao, Qingqing

doi:10.3390/machines10010066

Cited by 18 publications

(9 citation statements)

References 24 publications

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“…Particle swarm optimization (PSO) is adopted to identify the parameters of formula (14) and the specific values of the six parameters are a 1 =48.197, a 2 =693.89, a 3 =120.471, a 4 =24.525, a 5 =274.413, a 6 =188.437 [25]. Figure 8 shows the comparison of the friction curves between the experiment and simulation.…”

Section: Mathematical Model Of the Cylindermentioning

confidence: 99%

Research on position control of bidirectional dual magnetostrictive rods-based electro-hydrostatic actuator with active rotary valve

Wang

Zhu

Jiang

et al. 2020

Smart Mater. Struct.

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In this paper, the position control system based on a dual magnetostrictive rods-based electrohydrostatic actuator (DMEHA) was presented. The bidirectional output displacement of the DMEHA is achieved by a combination of an active rotary rectification valve and two magnetostrictive piston pumps. Simulations and experiments were performed to validate the feasibility of the DMEHA's position control. The results indicate that the DMEHA's output flow rate varies under different peak to peak input current and the DMEHA achieves bidirectional output displacement by adjusting appropriate phase angle of input current without directional valves. The designed DMEHA's peak out flow rate can reach 3.136 l min −1 at the driving frequency of 200 Hz. While tracking a sinusoidal displacement command signal with amplitude 3 mm and frequency 5 Hz, the maximum tracking error displacement is 0.96 mm and the root mean squared error is 0.561 mm at 200 Hz driving frequency and 6 A peak to peak input current.

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Section: Mathematical Model Of the Cylindermentioning

confidence: 99%

Research on position control of bidirectional dual magnetostrictive rods-based electro-hydrostatic actuator with active rotary valve

Wang

Zhu

Jiang

et al. 2020

Smart Mater. Struct.

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“…To overcome the trajectory tracking control challenge, a variety of studies to improve the control performance have been conducted for the trajectory tracking control, e.g., speed control to track reference trajectory [6], speed predictive control [7], active disturbance rejection control [8,9], sliding mode control for path tracking [10,11], and adaptive control [12,13]. From these studies, the accurate trajectory tracking control behavior cannot be easily guaranteed in the presence of uncertainties or external disturbances, especially for the coal mine drilling robot for rockburst prevention (CMDR).…”

Section: Introductionmentioning

confidence: 99%

A Walking Trajectory Tracking Control Based on Uncertainties Estimation for a Drilling Robot for Rockburst Prevention

Gu,

He,

Dai

et al. 2024

Machines

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A walking trajectory tracking control approach for a walking electrohydraulic control system is developed to reduce the walking trajectory tracking deviation and enhance robustness. The model uncertainties are estimated by a designed state observer. A saturation function is used to attenuate sliding mode chattering in the designed sliding mode controller. Additionally, a walking trajectory tracking control strategy is proposed to improve the walking trajectory tracking performance in terms of response time, tracking precision, and robustness, including walking longitudinal and lateral trajectory tracking controllers. Finally, simulation and experimental results are employed to verify the trajectory tracking performance and observability of the model uncertainties. The results testify that the proposed approach is better than other comparative methods, and the longitudinal and lateral trajectory tracking average absolute errors are controlled in 10.23 mm and 22.34 mm, respectively, thereby improving the walking trajectory tracking performance of the walking electrohydraulic control system for the coal mine drilling robot for rockburst prevention.

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“…However, limited to the technical conditions at that time, the stall mechanism caused by TLF can only be explained from the external characteristics rather than the in-depth analysis of the flow field. With the development of computational fluid dynamics (CFD) and advanced experimental technology, the local flow field in rotating machinery can be described, 9,10 which provides the possibility to further explore the stall mechanism of rotating machinery. At present, many scholars believe that the distortion of the TLF is an important reason for the occurrence of rotating stall.…”

Section: Introductionmentioning

confidence: 99%

Study on passive suppression method of rotating stall in mixed-flow pump: Using different impeller rim structures

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Tip leakage flow (TLF) is not only an important factor causing hydraulic loss in mixed-flow pump, but also one of the inceptions of rotating stall. At present, limiting the stall of rotating machinery by restraining the TLF has gradually become a research hotspot of rotating machinery. However, in the field of mixed-flow pump, it is still in the initial stage of exploration. With the development of hydraulic machinery towards large-scale and high-speed, it is necessary to study its rotating stall suppression methods and expand its efficient operation range. Therefore, based on the idea of passive suppression of rotating stall, four new impeller rim structures are proposed in this study to optimize the performance of mixed-flow pump and to suppress or delay the occurrence of stall. The research results show that the geometric structure of the rim clearance has a significant impact on the energy performance of the mixed-flow pump, Bulge_Tip structure and Double_Rib_Tip structure make the critical stall and deep stall operating points shift to the low flow rate operating points, which improves the “saddle area” performance of the mixed-flow pump to a certain extent. However, there are two stall segments in the performance curve of Groove_Tip and Single_Rib_Tip structures, which worsens the pump performance in the “saddle area”. From the analysis of flow mechanism, it can be seen that Bulge_Tip structure and Double_Rib_Tip structure can restrain the loss of turbulent kinetic energy in the gap under stall condition to a certain extent, and limit the position and strength of unsteady secondary vortex (SV) structure at the impeller outlet, so as to shorten the stall range of mixed-flow pump without deteriorating the stall flow field in the impeller. Therefore, Bulge_Tip structure and Double_Rib_Tip structure has a light application prospect in stall suppression of hydraulic machinery.

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Nonlinear Adaptive Control with Asymmetric Pressure Difference Compensation of a Hydraulic Pressure Servo System Using Two High Speed On/Off Valves

Cited by 18 publications

References 24 publications

Research on position control of bidirectional dual magnetostrictive rods-based electro-hydrostatic actuator with active rotary valve

Research on position control of bidirectional dual magnetostrictive rods-based electro-hydrostatic actuator with active rotary valve

A Walking Trajectory Tracking Control Based on Uncertainties Estimation for a Drilling Robot for Rockburst Prevention

Study on passive suppression method of rotating stall in mixed-flow pump: Using different impeller rim structures

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