Fig. 5: The test results of the PZR sensor.

a Linearity of piezoresistive sensor at half scale ( ± 55 V); b synchronism of mechanical angle and the output voltage of piezoresistive sensor; c piezoresistive output stability; d angular resolution of the PZR sensor at 16.5 mV each step of FSM; and e angular resolution of the PZR sensor at 11 mV each step of FSM