Linear Screw Actuators : Methods of Improvement and Quantitative Estimation of Changes

Actuators often does not fulfil user's requirements, so there is a need of improvement in many different cases. Following paper presents some ways of modifying actuator to reach desired aims. Besides making modifications, there are additional requirements to simulate and to evaluate influence of changes to received characteristic. Mathematical apparatus that are useful to it are following. First - integral methods of calculating area - boarded by both axis and curve of characteristic, inertia of this area, and placement of its centroid. It allows us to estimate growth of useful area on plane described by frequency and force. Second useful method is differentiation of function that describes force-frequency characteristic.