TMS320F28388D: Question on parameters used for resolver i/f in Digital Power SDK project / TIDM-02009

I am looking at TIDM-02009 from the Digital Power SDK for reference code for working with a resolver.  Is there documentation or otherwise some guidance on what these parameters are and if and how some of the resolver parameters can be adjusted for a given application?

Thanks!

From trinv_settings.h:

#define RESOLVER_BIAS   2.40f           // Bias between Resolver zero and Id

#define RESOLVER_OMEGA (200.0f * 2.0f * PI)
#define RESOLVER_ZETA 0.7f
#define RESOLVER_PHASE_COMP_GAIN - 4.6585E-5f

#define RESOLVER_LPF_SPD_BW 100.0

from trinv.c:

resolver_init(&resolver1);
resolver1.resolver_theta = &resolver_theta;
resolver1.resolver_omega = &resolver_omega;
resolver1.sample_time = 1.0f / (RESOLVER_EXC_FREQUENCY * 1000.0f);
resolver1.pll_gain_in = RESOLVER_OMEGA * RESOLVER_OMEGA;
resolver1.pll_gain_ff = 2.0f * RESOLVER_ZETA / RESOLVER_OMEGA;
resolver1.bias = RESOLVER_BIAS;
resolver1.phase_comp_gain = RESOLVER_PHASE_COMP_GAIN;
FILTER_FO_init(&resolver1.lpf_spd, RESOLVER_LPF_SPD_BW,
(RESOLVER_EXC_FREQUENCY * 1000.0f));