Eliminate the surplus torque of electro-hydraulic load simulator using the actuator command dynamic compensation control

2016 ◽  
Author(s):  
Zhihui Li ◽  
Zongxia Jiao ◽  
Yaoxing Shang ◽  
Shuai Wu
Keyword(s):  
Dynamic Compensation ◽  
Compensation Control ◽  
Hydraulic Load ◽  
Load Simulator ◽  
Surplus Torque

Surplus Torque Elimination Control of Electro-Hydraulic Load Simulator Based on Actuator Velocity Input Feedforword Compensating Method

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Zhihui Li ◽  
Yaoxing Shang ◽  
Zongxia Jiao ◽  
Shuai Wu ◽  
Jianyong Yao
Keyword(s):  
Torque Control ◽  
Hardware In The Loop ◽  
New Strategy ◽  
Hydraulic Load ◽  
Actuator System ◽  
Load Simulator ◽  
Load Simulation ◽  
The Mathematical Model ◽  
Surplus Torque ◽  
Velocity Input

Electro-hydraulic load simulator (EHLS) is a typical closed-loop torque control system. It is used to simulate the load of aircraft actuator on ground hardware-in-the-loop simulation and experiments. In general, EHLS is fixed with actuator shaft together. Thus, the movement of actuator has interference torque named the surplus torque on the EHLS. The surplus torque is not only related to the velocity of the actuator movement, but also related to the frequency of actuator movement. Especially when the model of the actuator and EHLS is dissimilar, the surplus torque is obviously different on different frequencies. In order to eliminate the surplus torque for accurate load simulation, the actuator velocity input feedforword compensating method (AVIFC) is proposed in this paper. In this strategy, the actuator velocity synchronous signals are used for compensation of different frequency actuator movement to eliminate surplus torque on different frequencies. First, the mathematical model of EHLS and the actuator system is established. Based on the models, the AVIFC method is proposed. It reveals the reason that generates surplus torque on different frequencies of actuator. For verification, simulations and experiments are conducted to prove that the new strategy performs well against low, medium, and high frequency movement interference. The results show that this method can effectively suppress the surplus torque with different frequencies and improve precision of EHLS with actuator movement.

Design and Application of Large Torque Electrical Load Simulator

2013 ◽  
Vol 427-429 ◽  
pp. 660-663
Author(s):  
Zhi Qiang Wei
Keyword(s):  
Mathematical Model ◽  
High Precision ◽  
Hybrid Control ◽  
Electrical Load ◽  
Practical Application ◽  
Compensation Control ◽  
Torque Load ◽  
Load Simulator ◽  
Surplus Torque ◽  
Rudder Angle

In order to meet the testing requirement of positive and reverse operation large torque load for new rudder, an electrical load simulator is designed. The system mathematical model is established and the feedforward compensation control of torque and rudder angle is adopted to restrain the surplus torque according to the principle of invariance. The high precision large torque load under positive and reverse operation for rudder is realized by torque and position hybrid control. The practical application shows that the proposed method can effectively restrain surplus torque and the system meets the high precision torque load under positive and reverse operation for rudder very well.

scholarly journals Adaptive Nonlinear Optimal Compensation Control for Electro-hydraulic Load Simulator

2010 ◽  
Vol 23 (6) ◽  
pp. 720-733 ◽  
Author(s):  
Yao Jianyong ◽  
Jiao Zongxia ◽  
Shang Yaoxing ◽  
Huang Cheng
Keyword(s):  
Compensation Control ◽  
Hydraulic Load ◽  
Load Simulator

Research on Adaptive PID Control for Load Simulator with Varying Load

2014 ◽  
Vol 568-570 ◽  
pp. 1031-1035
Author(s):  
Ju Tian ◽  
Yao Chen
Keyword(s):  
Pid Control ◽  
Simple Structure ◽  
Control Method ◽  
Parameter Tuning ◽  
Hardware In The Loop ◽  
Tuning Method ◽  
Hydraulic Load ◽  
Variation Characteristics ◽  
Load Simulator ◽  
Adaptive Pid Control

The electro-hydraulic load simulator is an important equipment for aircraft hardware-in-the-loop simulation. An adaptive PID control method for compensating extraneous torque with simple structure and easy to implement is proposed according to the variation characteristics of load gradient in the load simulator. The control parameter tuning method is also given.

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