Performance of a pneumatic force controlling servosystem: Influence of valves conductance

Abstract The paper presents the study addressed to evaluate the performance of a pneumatic force controlling servosystem. In particular, the servoactuator operating range, whereby the desired force can be controlled in steady-state working condition with speed disturbance, is analyzed. The servosystem is described with continuity flow-rate and rod equilibrium equations for the cylinder and the equation of air mass flow-rate through the valves. The parameters considered during the study are the force exerted by the cylinder, the speed of the rod, the sizes of the cylinder and valves, the pressure values of the air inside the chambers of the actuator, the coefficient of the polytropic transformation of the air. The methodology of analysis considers a dimensionless parameter in order to obtain general results which could be applied to any specific actual case. Furthermore, an application of the servosystem with digital modulated valves is presented and its nonlinear model in Matlab/Simulink environment is described. In conclusion the servosystem performance as obtained through nonlinear simulation is investigated on the basis of the non-dimensional design diagrams.

[1]  Mustapha Hamerlain,et al.  An anthropomorphic robot arm driven by artificial muscles using a variable structure control , 1995, Proceedings 1995 IEEE/RSJ International Conference on Intelligent Robots and Systems. Human Robot Interaction and Cooperative Robots.

[2]  Yukio Kawakami,et al.  EXPERIMENTAL STUDY ON SOLENOID VALVES CONTROLLED PNEUMATIC DIAPHRAGM MOTOR , 1996 .

[3]  Sadao Kawamura,et al.  PI type hierarchical feedback control scheme for pneumatic robots , 1989, Proceedings, 1989 International Conference on Robotics and Automation.

[4]  Alessandro Vigliani,et al.  Design Analysis of a Pneumatic Force Control Servosystem with Pressure Proportional Valve , 1998, J. Robotics Mechatronics.

[5]  Faryar Jabbari,et al.  Adaptive Pneumatic Force Actuation and Position Control , 1991 .

[6]  Massimo Sorli,et al.  Effect of valves conductances on a force controlling pneumatic actuator , 1998 .

[7]  Kenji Araki,et al.  THE FORCE CONTROL OF A SPOT WELDING MACHINE WITH A SPECIALLY DESIGNED PNEUMATIC CYLINDER , 1996 .

[8]  Chia-Hsiang Menq,et al.  Accurate Position Control of a Pneumatic Actuator , 1989, American Control Conference.

[9]  Sadao Kawamura,et al.  Practical Design of a Sliding Mode Controller for Pneumatic Actuators , 1997 .

[10]  E. Richard,et al.  Comparison Between Linear and Nonlinear Control of an Electropneumatic Servodrive , 1996 .

[11]  G. Walker,et al.  Variable Structure Control of a Pneumatic Actuator , 1995 .

[12]  Toshiro Noritsugu,et al.  ADAPTIVE VARIABLE STRUCTURE CONTROL OF PNEUMATICALLY ACTUATED ROBOT , 1989 .

[13]  F. W. Paul,et al.  Controlling Impact Forces in Pneumatic Robot Hand Designs , 1987 .

[14]  Ming-chang Shih,et al.  FUZZY PWM CONTROL THE POSITIONS OF A PNEUMATIC ROBOT CYLINDER BY HIGH SPEED SOLENOID VALVES , 1996 .

[15]  James E. Bobrow,et al.  Adaptive Tracking Control of an Air Powered Robot Actuator , 1993 .

[16]  Massimo Sorli,et al.  Design analysis of a force controlling pneumatic actuator , 1999 .

[17]  Toshiro Noritsugu,et al.  FORCE CONTROL OF PNEUMATIC SERVO SYSTEM USING NEURAL NETWORK , 1996 .

[18]  J. K. Hedrick,et al.  Pneumatic Actuators for Vehicle Active Suspension Applications , 1985 .

[19]  A. Jutard,et al.  Models of a Pneumatic PWM Solenoid Valve for Engineering Applications , 1992 .

[20]  Hideo Hanafusa,et al.  Pneumatic Servo Control System by Using Adaptive Gain Pressure Control , 1989 .

[21]  Mohamed Bouri,et al.  INTEGRAL SLIDING MODE CONTROLLER OF A ROTATIONAL SERVODRIVE , 1996 .

[22]  James E. Bobrow,et al.  An Analysis of a Pneumatic Servo System and Its Application to a Computer-Controlled Robot , 1988 .

[23]  Carlo Ferraresi,et al.  Force controlling pneumatic servoactuator via digital PWM modulated valves , 1995 .