Motion control of an aircraft electro-hydraulic servo actuator

Fadel, M.; Rabie, M. G.; Youssef, Abou-Bakr M.

doi:10.1088/1757-899x/610/1/012073

Cited by 9 publications

(7 citation statements)

References 4 publications

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“…PID controller is used in more than 95 % of process control loops nowadays. The PID controllers are today found in all areas where control is used [37]. The PID algorithm is described by:…”

Section: Pid Controller Designmentioning

confidence: 99%

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Hybrid Control Algorithm Sliding Mode-PID for an Electrohydraulic Servo Actuator System Based on Particle Swarm Optimization Technique

Fadel¹

2023

JESA

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The Electro-Hydraulic Servo Actuators (EHSA) use the technology of the integration between hydraulic and electrical systems. These Actuators are widely used in many modern control systems including aircraft and missile flight control systems which can produce a rapid response, high power-to-weight ratio, and large stiffness. However, the nonlinearity of the EHSA systems has an impact on their accuracy and motion control. In this paper, a hybrid control algorithm sliding mode-PID (SMCPID) controller is designed based on the Particle Swarm Optimization (PSO) technique to maintain or enhance the performance of the utilized controller and reduce the chattering phenomena. First, a detailed non-linear mathematical model of the EHSA is developed and a computer simulation program is built using MATLAB/SIMULINK package. Then, three types of control strategies are designed and studied: PID, SMC, and hybrid SMCPID controllers. The optimization of the parameters of the PID controller and the variables of the SMC and hybrid SMCPID controllers is presented by using the PSO technique. The SMC control strategy is developed from the derived dynamic equation, whose stability is demonstrated by the Lyapunov theorem. Finally, in order to ensure the effectiveness of the optimized controllers, a comparative simulation study between the three types of controllers is presented where the root mean square error (RMS) values, and overshoot percentage (O.S %) are calculated and act as the performance indexes for comparison purposes. The simulation results show that the proposed hybrid SMCPID controller tuned by the PSO technique outperforms the PID and SMC controllers in terms of overall performance.

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“…PID controller is used in more than 95 % of process control loops nowadays. The PID controllers are today found in all areas where control is used [37]. The PID algorithm is described by:…”

Section: Pid Controller Designmentioning

confidence: 99%

“…The general expression of SMC control structure, 𝑢 𝑠𝑚𝑐 (𝑡) consists of switching control and equivalent control as shown in equation (37). The switching control, 𝑢 𝑠𝑤 (𝑡) is obtained at 𝑠(𝑡) ≠ 0 corresponding to the reaching phase.…”

Section: Sliding Mode Control (Smc)mentioning

confidence: 99%

Hybrid Control Algorithm Sliding Mode-PID for an Electrohydraulic Servo Actuator System Based on Particle Swarm Optimization Technique

Fadel¹

2023

JESA

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“…The electro-hydraulic servo control system has been widely used in aerospace, weapons, ships, large power stations, material testing machines, and other fields since it possesses many advantages such as high power-to-weight ratio, fast dynamic response, and high degree of digitization. [1][2][3][4][5][6] As the crucial component, the electro-hydraulic servo valve (EHSV) directly influences the performance of the entire system. In order to further increase the power-to-weight ratio, the EHSV has been developing towards high-pressure and large flow rate capability since its advent.…”

Section: Introductionmentioning

confidence: 99%

Novel resonance stability criterion for the 2D magnetically levitated servo-proportional valve

Meng

Zhu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The leakage of the pilot stage of the 2D valve mainly depends on the size of its initial opening. According to the Routh criterion, the pilot stage of the two-dimensional magnetically levitated servo-proportional valve (2D-MSP valve) needs to be designed to have certain positive values to increase the damping ratio to improve valve stability, which leads to the leakage flow representing a non-negligible power loss. In order to reduce leakage flow and achieve goal of energy saving, this paper presents a novel resonance stability criterion by considering nonlinear characteristics of the fluid dynamic system. First, the 2D-MSP valve is regarded as a three-way valve-controlled differential cylinder system. Based on the frequency response of the resonance state, the energy conservation method is used to solve the flow “backfilling” area, the motion equation of the cylinder piston (valve spool displacement) and the pressure waveform of the sensing chamber under different opening and pressure amplitude ratio. Then, the analytical expression of the resonance peak amplitude is obtained and the resonance stability criterion is deduced. The result is compared with the Routh stability criterion, which illustrates that the positive openings of the pilot stage can be reduced to one-third of the original value. The prototype valve is then designed and manufactured based on the resonance stability criterion. The dynamic and static characteristics under different system pressures are measured. Experimental results show that the prototype valve is an over-damped system without any overshoot, which has excellent working stability, and its static and dynamic performance can meet the demands of the industry servo-proportional control system. The research work validates the effectiveness of the proposed resonance stability criterion.

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“…This operation is one of the tasks of the control system. After detecting the faults, Fault-Tolerant Flight Control Systems (FTFCS) take the aircraft to the autopilot control mode and prevent the aircraft from crashing [4]. There are several ways to control a commercial plane, some of which are discussed below.…”

Section: Introductionmentioning

confidence: 99%

A New Type-2 Fuzzy Sliding Mode Control for Longitudinal Aerodynamic Parameters of a Commercial Aircraft

Tavoosi¹

2020

JESA

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Although sliding mode control has many advantages such as stability and robustness but there are two important disadvantages as follow: Chattering phenomenon and mathematical nonlinear dynamic equivalent controller part. So, this paper presents a new method of adaptive sliding mode control based on general type-2 fuzzy logic to overcome on the mentioned problems. First, the longitudinal motion equations of a commercial aircraft and the upper limits of the unknown functions are introduced, which include the driving errors and uncertain parameters of the model. Then, a general type-2 fuzzy neural network (GT2FNNs), with adaptive rules, estimates these limits. Estimating the limits can reduce the computational load with less rules and weight than the dynamic matrix. The Boeing 747 is being studied and an attempt has been made to use a model very close to this aircraft. The stability of the control system has been proven. The simulation results show that by applying three models of faults to the aircraft system, the proposed type-2 fuzzy-based sliding mode control has excellent performance, especially in controlling the Aileron and Rudder angles.

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Motion control of an aircraft electro-hydraulic servo actuator

Cited by 9 publications

References 4 publications

Hybrid Control Algorithm Sliding Mode-PID for an Electrohydraulic Servo Actuator System Based on Particle Swarm Optimization Technique

Hybrid Control Algorithm Sliding Mode-PID for an Electrohydraulic Servo Actuator System Based on Particle Swarm Optimization Technique

Novel resonance stability criterion for the 2D magnetically levitated servo-proportional valve

A New Type-2 Fuzzy Sliding Mode Control for Longitudinal Aerodynamic Parameters of a Commercial Aircraft

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