Access Restriction

Author Dunlop, G. R. ♦ Christchurch, Pb
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Nitinol Wire Actuator ♦ Feedback Control ♦ State Machine Controller ♦ Low Level ♦ Strain Generation ♦ Digital Control ♦ Strain Change ♦ Nitinol Actuator ♦ Endovascular Stent ♦ Strain Response ♦ Actuation Time ♦ Nitinol Wire Resistance ♦ Small Walking Stikito Robot ♦ Adjustable Pwm Setting ♦ Novel Control Strategy ♦ Ambient Temperature Fluctuation ♦ Nitinol Wire ♦ Minimum Time ♦ Strain State ♦ Voltage Supply ♦ Electrical Characteristic
Abstract Abstract:- The use of Nitinol wires as actuators is becoming more common and a number of applications such as endovascular stents and the small walking Stikito robots are well known. The thermodynamic and electrical characteristics associated with the strain generation are examined and a novel control strategy developed to optimise the strain response. The actuation time for both on and off operations can be minimised by using a low level constant current through the Nitinol actuator to determine the Nitinol wire resistance, and hence the strain state. In this way, the effects of voltage supply and ambient temperature fluctuations can be measured and allowed for. The result is a simple 4 state machine controller that uses timed on and off states together with an adjustable PWM setting to achieve minimum times for on and off strain changes. Key-Words:- shape-memory, digital control, Nitinol 1
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study