Verification and Comparison of Two Tribodiagnostic Methods for Analyzing of the Worn out Oils in Service

Abstract

The paper deals with comparison and verification of two standard methods for measuring the total acid number of used oils. This is a tribodiagnostic method used to the detection of important quality parameters of oils in service, which determine the degradation of oil filling. This significantly affects the life cycle of oil and, consequently, the lubrication system. The methods for measuring aircraft motor and insulating oils are compared. The method procedures, preparation titration solutions, solvents, through the use of the test sample and electrodes to the accuracy of the measurement on the sample oils are compared. It compares the process of preparation methods of titrating solution, solvents, samples and fills through the use of electrodes to the accuracy of the measurement on the sample oils. From measurements of the samples accuracy and validity of both methods using statistical processing of measurement results is calculated. It utilizes internal control of measurements by means of an internal standard and also inter-laboratory comparison of measurement results.

Technical and Software Equipment for the Real Time Positioning Control System in Mechatronic Systems with Pneumatic Artificial Muscles

“…Fundamentals of pneumatic actuator operation are to convert pneumatic energy into mechanical energy. The muscle itself is conducting input work W in in consequence of medium (gas) impact to its inner membrane layer [6,8,9].…”

“…From this equation is obvious that the force which will muscle develop is linearly dependent on the pressure of the medium inside muscle. It is also a function of the angle between the cylinder axis and the braid fiber θ [6,8,10].…”

“…[11] Fig. 1 PAMs in antagonistic involvement [6] Control system for the experimental facility with pneumatic artificial muscles For characteristics of the artificial muscles non-linearity, controlling pneumatic actuators is proportionally complicated. This is the reason for the design of control system for manipulator position control with the sufficiently rapid response to changes in the characteristics of the artificial muscle [11].…”

“…These factors have the same impact on the performance changes in response to changes in the external load. With more recent pneumatic actuators such as McKibben muscle, Braided and Rubber actuator were eliminated several of these disadvantages, but some of them still remain [1,5,6].…”

Real Time Pressure Control in Pneumatic Actuators

“…due to reduced performance of a transition phenomenon due to changes in external load or problems due to the compressibility of the medium. For changes to the external load it is not easy to ensure the position control with high accuracy [1][2][3][4].…”