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Tune orbital period of spacecraft using kRPC
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import krpc, time | |
target_period = 7435 # The target orbital period in seconds | |
conn = krpc.connect() | |
vessel = conn.space_center.active_vessel | |
period = conn.add_stream(getattr, vessel.orbit, 'period') | |
vessel.control.throttle = 0.0 | |
autopilot = vessel.auto_pilot | |
autopilot.engage() | |
autopilot.reference_frame = vessel.orbital_reference_frame | |
autopilot.attenuation_angle = (0.1, 0.1, 0.1) | |
def error(): | |
return target_period - period() | |
def set_thrust_limit(n): | |
if 0 <= n <= 1: | |
for engine in vessel.parts.engines: | |
engine.thrust_limit = n | |
while abs(error()) > 0.00001: | |
if error() > 0: | |
autopilot.target_heading = 0 | |
else: | |
autopilot.target_heading = 180 | |
autopilot.wait() | |
set_thrust_limit(abs(error()) / 100.0) | |
vessel.control.throttle = 1.0 | |
scale = 1 / error() | |
last = abs(error()) | |
while vessel.control.throttle > 0.01 and abs(error()) <= last: | |
vessel.control.throttle = scale * error() | |
last = abs(error()) | |
print(error()) | |
vessel.control.throttle = 0 | |
time.sleep(0.5) | |
set_thrust_limit(1) |
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